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Sourcecode: vim version File versions

option.c

/* vi:set ts=8 sts=4 sw=4:
 *
 * VIM - Vi IMproved    by Bram Moolenaar
 *
 * Do ":help uganda"  in Vim to read copying and usage conditions.
 * Do ":help credits" in Vim to see a list of people who contributed.
 * See README.txt for an overview of the Vim source code.
 */

/*
 * Code to handle user-settable options. This is all pretty much table-
 * driven. Checklist for adding a new option:
 * - Put it in the options array below (copy an existing entry).
 * - For a global option: Add a variable for it in option.h.
 * - For a buffer or window local option:
 *   - Add a PV_XX entry to the enum below.
 *   - Add a variable to the window or buffer struct in structs.h.
 *   - For a window option, add some code to copy_winopt().
 *   - For a buffer option, add some code to buf_copy_options().
 *   - For a buffer string option, add code to check_buf_options().
 * - If it's a numeric option, add any necessary bounds checks to do_set().
 * - If it's a list of flags, add some code in do_set(), search for WW_ALL.
 * - When adding an option with expansion (P_EXPAND), but with a different
 *   default for Vi and Vim (no P_VI_DEF), add some code at VIMEXP.
 * - Add documentation!  One line in doc/help.txt, full description in
 *   options.txt, and any other related places.
 * - Add an entry in runtime/optwin.vim.
 * When making changes:
 * - Adjust the help for the option in doc/option.txt.
 * - When an entry has the P_VIM flag, or is lacking the P_VI_DEF flag, add a
 *   comment at the help for the 'compatible' option.
 */

#define IN_OPTION_C
#include "vim.h"

/*
 * The options that are local to a window or buffer have "indir" set to one of
 * these values.  Special values:
 * PV_NONE: global option.
 * PV_WIN is added: window-local option
 * PV_BUF is added: buffer-local option
 * PV_BOTH is added: global option which also has a local value.
 */
#define PV_BOTH 0x1000
#define PV_WIN  0x2000
#define PV_BUF  0x4000
#define PV_MASK 0x0fff
#define OPT_WIN(x)  (idopt_T)(PV_WIN + (int)(x))
#define OPT_BUF(x)  (idopt_T)(PV_BUF + (int)(x))
#define OPT_BOTH(x) (idopt_T)(PV_BOTH + (int)(x))

/*
 * Definition of the PV_ values for buffer-local options.
 * The BV_ values are defined in option.h.
 */
#define PV_AI           OPT_BUF(BV_AI)
#define PV_AR           OPT_BOTH(OPT_BUF(BV_AR))
#ifdef FEAT_QUICKFIX
# define PV_BH          OPT_BUF(BV_BH)
# define PV_BT          OPT_BUF(BV_BT)
# define PV_EFM         OPT_BOTH(OPT_BUF(BV_EFM))
# define PV_GP          OPT_BOTH(OPT_BUF(BV_GP))
# define PV_MP          OPT_BOTH(OPT_BUF(BV_MP))
#endif
#define PV_BIN          OPT_BUF(BV_BIN)
#define PV_BL           OPT_BUF(BV_BL)
#ifdef FEAT_MBYTE
# define PV_BOMB  OPT_BUF(BV_BOMB)
#endif
#define PV_CI           OPT_BUF(BV_CI)
#ifdef FEAT_CINDENT
# define PV_CIN         OPT_BUF(BV_CIN)
# define PV_CINK  OPT_BUF(BV_CINK)
# define PV_CINO  OPT_BUF(BV_CINO)
#endif
#if defined(FEAT_SMARTINDENT) || defined(FEAT_CINDENT)
# define PV_CINW  OPT_BUF(BV_CINW)
#endif
#ifdef FEAT_FOLDING
# define PV_CMS         OPT_BUF(BV_CMS)
#endif
#ifdef FEAT_COMMENTS
# define PV_COM         OPT_BUF(BV_COM)
#endif
#ifdef FEAT_INS_EXPAND
# define PV_CPT         OPT_BUF(BV_CPT)
# define PV_DICT  OPT_BOTH(OPT_BUF(BV_DICT))
# define PV_TSR         OPT_BOTH(OPT_BUF(BV_TSR))
#endif
#ifdef FEAT_COMPL_FUNC
# define PV_CFU         OPT_BUF(BV_CFU)
#endif
#ifdef FEAT_FIND_ID
# define PV_DEF         OPT_BOTH(OPT_BUF(BV_DEF))
# define PV_INC         OPT_BOTH(OPT_BUF(BV_INC))
#endif
#define PV_EOL          OPT_BUF(BV_EOL)
#define PV_EP           OPT_BOTH(OPT_BUF(BV_EP))
#define PV_ET           OPT_BUF(BV_ET)
#ifdef FEAT_MBYTE
# define PV_FENC  OPT_BUF(BV_FENC)
#endif
#if defined(FEAT_BEVAL) && defined(FEAT_EVAL)
# define PV_BEXPR OPT_BOTH(OPT_BUF(BV_BEXPR))
#endif
#ifdef FEAT_EVAL
# define PV_FEX         OPT_BUF(BV_FEX)
#endif
#define PV_FF           OPT_BUF(BV_FF)
#define PV_FLP          OPT_BUF(BV_FLP)
#define PV_FO           OPT_BUF(BV_FO)
#ifdef FEAT_AUTOCMD
# define PV_FT          OPT_BUF(BV_FT)
#endif
#define PV_IMI          OPT_BUF(BV_IMI)
#define PV_IMS          OPT_BUF(BV_IMS)
#if defined(FEAT_CINDENT) && defined(FEAT_EVAL)
# define PV_INDE  OPT_BUF(BV_INDE)
# define PV_INDK  OPT_BUF(BV_INDK)
#endif
#if defined(FEAT_FIND_ID) && defined(FEAT_EVAL)
# define PV_INEX  OPT_BUF(BV_INEX)
#endif
#define PV_INF          OPT_BUF(BV_INF)
#define PV_ISK          OPT_BUF(BV_ISK)
#ifdef FEAT_CRYPT
# define PV_KEY         OPT_BUF(BV_KEY)
#endif
#ifdef FEAT_KEYMAP
# define PV_KMAP  OPT_BUF(BV_KMAP)
#endif
#define PV_KP           OPT_BOTH(OPT_BUF(BV_KP))
#ifdef FEAT_LISP
# define PV_LISP  OPT_BUF(BV_LISP)
#endif
#define PV_MA           OPT_BUF(BV_MA)
#define PV_ML           OPT_BUF(BV_ML)
#define PV_MOD          OPT_BUF(BV_MOD)
#define PV_MPS          OPT_BUF(BV_MPS)
#define PV_NF           OPT_BUF(BV_NF)
#ifdef FEAT_OSFILETYPE
# define PV_OFT         OPT_BUF(BV_OFT)
#endif
#ifdef FEAT_COMPL_FUNC
# define PV_OFU         OPT_BUF(BV_OFU)
#endif
#define PV_PATH         OPT_BOTH(OPT_BUF(BV_PATH))
#define PV_PI           OPT_BUF(BV_PI)
#ifdef FEAT_TEXTOBJ
# define PV_QE          OPT_BUF(BV_QE)
#endif
#define PV_RO           OPT_BUF(BV_RO)
#ifdef FEAT_SMARTINDENT
# define PV_SI          OPT_BUF(BV_SI)
#endif
#ifndef SHORT_FNAME
# define PV_SN          OPT_BUF(BV_SN)
#endif
#ifdef FEAT_SYN_HL
# define PV_SMC         OPT_BUF(BV_SMC)
# define PV_SYN         OPT_BUF(BV_SYN)
#endif
#ifdef FEAT_SPELL
# define PV_SPC         OPT_BUF(BV_SPC)
# define PV_SPF         OPT_BUF(BV_SPF)
# define PV_SPL         OPT_BUF(BV_SPL)
#endif
#define PV_STS          OPT_BUF(BV_STS)
#ifdef FEAT_SEARCHPATH
# define PV_SUA         OPT_BUF(BV_SUA)
#endif
#define PV_SW           OPT_BUF(BV_SW)
#define PV_SWF          OPT_BUF(BV_SWF)
#define PV_TAGS         OPT_BOTH(OPT_BUF(BV_TAGS))
#define PV_TS           OPT_BUF(BV_TS)
#define PV_TW           OPT_BUF(BV_TW)
#define PV_TX           OPT_BUF(BV_TX)
#define PV_WM           OPT_BUF(BV_WM)

/*
 * Definition of the PV_ values for window-local options.
 * The WV_ values are defined in option.h.
 */
#define PV_LIST         OPT_WIN(WV_LIST)
#ifdef FEAT_ARABIC
# define PV_ARAB  OPT_WIN(WV_ARAB)
#endif
#ifdef FEAT_DIFF
# define PV_DIFF  OPT_WIN(WV_DIFF)
#endif
#ifdef FEAT_FOLDING
# define PV_FDC         OPT_WIN(WV_FDC)
# define PV_FEN         OPT_WIN(WV_FEN)
# define PV_FDI         OPT_WIN(WV_FDI)
# define PV_FDL         OPT_WIN(WV_FDL)
# define PV_FDM         OPT_WIN(WV_FDM)
# define PV_FML         OPT_WIN(WV_FML)
# define PV_FDN         OPT_WIN(WV_FDN)
# ifdef FEAT_EVAL
#  define PV_FDE  OPT_WIN(WV_FDE)
#  define PV_FDT  OPT_WIN(WV_FDT)
# endif
# define PV_FMR         OPT_WIN(WV_FMR)
#endif
#ifdef FEAT_LINEBREAK
# define PV_LBR         OPT_WIN(WV_LBR)
#endif
#define PV_NU           OPT_WIN(WV_NU)
#ifdef FEAT_LINEBREAK
# define PV_NUW         OPT_WIN(WV_NUW)
#endif
#if defined(FEAT_WINDOWS) && defined(FEAT_QUICKFIX)
# define PV_PVW         OPT_WIN(WV_PVW)
#endif
#ifdef FEAT_RIGHTLEFT
# define PV_RL          OPT_WIN(WV_RL)
# define PV_RLC         OPT_WIN(WV_RLC)
#endif
#ifdef FEAT_SCROLLBIND
# define PV_SCBIND      OPT_WIN(WV_SCBIND)
#endif
#define PV_SCROLL OPT_WIN(WV_SCROLL)
#ifdef FEAT_SPELL
# define PV_SPELL OPT_WIN(WV_SPELL)
#endif
#ifdef FEAT_SYN_HL
# define PV_CUC         OPT_WIN(WV_CUC)
# define PV_CUL         OPT_WIN(WV_CUL)
#endif
#ifdef FEAT_STL_OPT
# define PV_STL         OPT_BOTH(OPT_WIN(WV_STL))
#endif
#ifdef FEAT_WINDOWS
# define PV_WFH         OPT_WIN(WV_WFH)
#endif
#ifdef FEAT_VERTSPLIT
# define PV_WFW         OPT_WIN(WV_WFW)
#endif
#define PV_WRAP         OPT_WIN(WV_WRAP)


/* WV_ and BV_ values get typecasted to this for the "indir" field */
typedef enum
{
    PV_NONE = 0,
    PV_MAXVAL = 0xffff    /* to avoid warnings for value out of range */
} idopt_T;

/*
 * Options local to a window have a value local to a buffer and global to all
 * buffers.  Indicate this by setting "var" to VAR_WIN.
 */
#define VAR_WIN ((char_u *)-1)

/*
 * These are the global values for options which are also local to a buffer.
 * Only to be used in option.c!
 */
static int  p_ai;
static int  p_bin;
#ifdef FEAT_MBYTE
static int  p_bomb;
#endif
#if defined(FEAT_QUICKFIX)
static char_u     *p_bh;
static char_u     *p_bt;
#endif
static int  p_bl;
static int  p_ci;
#ifdef FEAT_CINDENT
static int  p_cin;
static char_u     *p_cink;
static char_u     *p_cino;
#endif
#if defined(FEAT_SMARTINDENT) || defined(FEAT_CINDENT)
static char_u     *p_cinw;
#endif
#ifdef FEAT_COMMENTS
static char_u     *p_com;
#endif
#ifdef FEAT_FOLDING
static char_u     *p_cms;
#endif
#ifdef FEAT_INS_EXPAND
static char_u     *p_cpt;
#endif
#ifdef FEAT_COMPL_FUNC
static char_u     *p_cfu;
static char_u     *p_ofu;
#endif
static int  p_eol;
static int  p_et;
#ifdef FEAT_MBYTE
static char_u     *p_fenc;
#endif
static char_u     *p_ff;
static char_u     *p_fo;
static char_u     *p_flp;
#ifdef FEAT_AUTOCMD
static char_u     *p_ft;
#endif
static long p_iminsert;
static long p_imsearch;
#if defined(FEAT_FIND_ID) && defined(FEAT_EVAL)
static char_u     *p_inex;
#endif
#if defined(FEAT_CINDENT) && defined(FEAT_EVAL)
static char_u     *p_inde;
static char_u     *p_indk;
#endif
#if defined(FEAT_EVAL)
static char_u     *p_fex;
#endif
static int  p_inf;
static char_u     *p_isk;
#ifdef FEAT_CRYPT
static char_u     *p_key;
#endif
#ifdef FEAT_LISP
static int  p_lisp;
#endif
static int  p_ml;
static int  p_ma;
static int  p_mod;
static char_u     *p_mps;
static char_u     *p_nf;
#ifdef FEAT_OSFILETYPE
static char_u     *p_oft;
#endif
static int  p_pi;
#ifdef FEAT_TEXTOBJ
static char_u     *p_qe;
#endif
static int  p_ro;
#ifdef FEAT_SMARTINDENT
static int  p_si;
#endif
#ifndef SHORT_FNAME
static int  p_sn;
#endif
static long p_sts;
#if defined(FEAT_SEARCHPATH)
static char_u     *p_sua;
#endif
static long p_sw;
static int  p_swf;
#ifdef FEAT_SYN_HL
static long p_smc;
static char_u     *p_syn;
#endif
#ifdef FEAT_SPELL
static char_u     *p_spc;
static char_u     *p_spf;
static char_u     *p_spl;
#endif
static long p_ts;
static long p_tw;
static int  p_tx;
static long p_wm;
#ifdef FEAT_KEYMAP
static char_u     *p_keymap;
#endif

/* Saved values for when 'bin' is set. */
static int  p_et_nobin;
static int  p_ml_nobin;
static long p_tw_nobin;
static long p_wm_nobin;

/* Saved values for when 'paste' is set */
static long p_tw_nopaste;
static long p_wm_nopaste;
static long p_sts_nopaste;
static int  p_ai_nopaste;

struct vimoption
{
    char    *fullname;  /* full option name */
    char    *shortname; /* permissible abbreviation */
    long_u  flags;            /* see below */
    char_u  *var;       /* global option: pointer to variable;
                         * window-local option: VAR_WIN;
                         * buffer-local option: global value */
    idopt_T indir;            /* global option: PV_NONE;
                         * local option: indirect option index */
    char_u  *def_val[2];      /* default values for variable (vi and vim) */
#ifdef FEAT_EVAL
    scid_T  scriptID;   /* script in which the option was last set */
# define SCRIPTID_INIT , 0
#else
# define SCRIPTID_INIT
#endif
};

#define VI_DEFAULT  0       /* def_val[VI_DEFAULT] is Vi default value */
#define VIM_DEFAULT 1       /* def_val[VIM_DEFAULT] is Vim default value */

/*
 * Flags
 */
#define P_BOOL          0x01  /* the option is boolean */
#define P_NUM           0x02  /* the option is numeric */
#define P_STRING  0x04  /* the option is a string */
#define P_ALLOCED 0x08  /* the string option is in allocated memory,
                           must use free_string_option() when
                           assigning new value. Not set if default is
                           the same. */
#define P_EXPAND  0x10  /* environment expansion.  NOTE: P_EXPAND can
                           never be used for local or hidden options! */
#define P_NODEFAULT     0x40  /* don't set to default value */
#define P_DEF_ALLOCED   0x80  /* default value is in allocated memory, must
                            use vim_free() when assigning new value */
#define P_WAS_SET 0x100 /* option has been set/reset */
#define P_NO_MKRC 0x200 /* don't include in :mkvimrc output */
#define P_VI_DEF  0x400 /* Use Vi default for Vim */
#define P_VIM           0x800 /* Vim option, reset when 'cp' set */

                        /* when option changed, what to display: */
#define P_RSTAT         0x1000      /* redraw status lines */
#define P_RWIN          0x2000      /* redraw current window */
#define P_RBUF          0x4000      /* redraw current buffer */
#define P_RALL          0x6000      /* redraw all windows */
#define P_RCLR          0x7000      /* clear and redraw all */

#define P_COMMA         0x8000      /* comma separated list */
#define P_NODUP         0x10000L/* don't allow duplicate strings */
#define P_FLAGLIST      0x20000L/* list of single-char flags */

#define P_SECURE  0x40000L/* cannot change in modeline or secure mode */
#define P_GETTEXT 0x80000L/* expand default value with _() */
#define P_NOGLOB       0x100000L/* do not use local value for global vimrc */
#define P_NFNAME       0x200000L/* only normal file name chars allowed */
#define P_INSECURE     0x400000L/* option was set from a modeline */
#define P_PRI_MKRC     0x800000L/* priority for :mkvimrc (setting option has
                           side effects) */

#define ISK_LATIN1  (char_u *)"@,48-57,_,192-255"

/* 'isprint' for latin1 is also used for MS-Windows cp1252, where 0x80 is used
 * for the currency sign. */
#if defined(MSDOS) || defined(MSWIN) || defined(OS2)
# define ISP_LATIN1 (char_u *)"@,~-255"
#else
# define ISP_LATIN1 (char_u *)"@,161-255"
#endif

/* The 16 bit MS-DOS version is low on space, make the string as short as
 * possible when compiling with few features. */
#if defined(FEAT_DIFF) || defined(FEAT_FOLDING) || defined(FEAT_SPELL) \
      || defined(FEAT_VERTSPLIT) || defined(FEAT_CLIPBOARD) \
      || defined(FEAT_INS_EXPAND) || defined(FEAT_SYN_HL)
# define HIGHLIGHT_INIT "8:SpecialKey,@:NonText,d:Directory,e:ErrorMsg,i:IncSearch,l:Search,m:MoreMsg,M:ModeMsg,n:LineNr,r:Question,s:StatusLine,S:StatusLineNC,c:VertSplit,t:Title,v:Visual,V:VisualNOS,w:WarningMsg,W:WildMenu,f:Folded,F:FoldColumn,A:DiffAdd,C:DiffChange,D:DiffDelete,T:DiffText,>:SignColumn,B:SpellBad,P:SpellCap,R:SpellRare,L:SpellLocal,+:Pmenu,=:PmenuSel,x:PmenuSbar,X:PmenuThumb,*:TabLine,#:TabLineSel,_:TabLineFill,!:CursorColumn,.:CursorLine"
#else
# define HIGHLIGHT_INIT "8:SpecialKey,@:NonText,d:Directory,e:ErrorMsg,i:IncSearch,l:Search,m:MoreMsg,M:ModeMsg,n:LineNr,r:Question,s:StatusLine,S:StatusLineNC,t:Title,v:Visual,w:WarningMsg,W:WildMenu,>:SignColumn,*:TabLine,#:TabLineSel,_:TabLineFill"
#endif

/*
 * options[] is initialized here.
 * The order of the options MUST be alphabetic for ":set all" and findoption().
 * All option names MUST start with a lowercase letter (for findoption()).
 * Exception: "t_" options are at the end.
 * The options with a NULL variable are 'hidden': a set command for them is
 * ignored and they are not printed.
 */
static struct vimoption
#ifdef FEAT_GUI_W16
      _far
#endif
      options[] =
{
    {"aleph",         "al",   P_NUM|P_VI_DEF,
#ifdef FEAT_RIGHTLEFT
                      (char_u *)&p_aleph, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {
#if (defined(MSDOS) || defined(WIN3264) || defined(OS2)) && !defined(FEAT_GUI_W32)
                      (char_u *)128L,
#else
                      (char_u *)224L,
#endif
                                  (char_u *)0L} SCRIPTID_INIT},
    {"antialias",   "anti", P_BOOL|P_VI_DEF|P_VIM|P_RCLR,
#if defined(FEAT_GUI) && defined(MACOS_X)
                      (char_u *)&p_antialias, PV_NONE,
                      {(char_u *)FALSE, (char_u *)FALSE}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)FALSE, (char_u *)FALSE}
#endif
                      SCRIPTID_INIT},
    {"arabic",        "arab", P_BOOL|P_VI_DEF|P_VIM,
#ifdef FEAT_ARABIC
                      (char_u *)VAR_WIN, PV_ARAB,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"arabicshape", "arshape", P_BOOL|P_VI_DEF|P_VIM|P_RCLR,
#ifdef FEAT_ARABIC
                      (char_u *)&p_arshape, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
    {"allowrevins", "ari",  P_BOOL|P_VI_DEF|P_VIM,
#ifdef FEAT_RIGHTLEFT
                      (char_u *)&p_ari, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"altkeymap",   "akm",  P_BOOL|P_VI_DEF,
#ifdef FEAT_FKMAP
                      (char_u *)&p_altkeymap, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"ambiwidth",  "ambw",  P_STRING|P_VI_DEF|P_RCLR,
#if defined(FEAT_MBYTE)
                      (char_u *)&p_ambw, PV_NONE,
                      {(char_u *)"single", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
#ifdef FEAT_AUTOCHDIR
    {"autochdir",  "acd",   P_BOOL|P_VI_DEF,
                      (char_u *)&p_acd, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
#endif
    {"autoindent",  "ai",   P_BOOL|P_VI_DEF,
                      (char_u *)&p_ai, PV_AI,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"autoprint",   "ap",   P_BOOL|P_VI_DEF,
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"autoread",    "ar",   P_BOOL|P_VI_DEF,
                      (char_u *)&p_ar, PV_AR,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"autowrite",   "aw",   P_BOOL|P_VI_DEF,
                      (char_u *)&p_aw, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"autowriteall","awa",  P_BOOL|P_VI_DEF,
                      (char_u *)&p_awa, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"background",  "bg",   P_STRING|P_VI_DEF|P_RCLR,
                      (char_u *)&p_bg, PV_NONE,
                      {
#if (defined(MSDOS) || defined(OS2) || defined(WIN3264)) && !defined(FEAT_GUI)
                      (char_u *)"dark",
#else
                      (char_u *)"light",
#endif
                                  (char_u *)0L} SCRIPTID_INIT},
    {"backspace",   "bs",   P_STRING|P_VI_DEF|P_VIM|P_COMMA|P_NODUP,
                      (char_u *)&p_bs, PV_NONE,
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"backup",        "bk",   P_BOOL|P_VI_DEF|P_VIM,
                      (char_u *)&p_bk, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"backupcopy",  "bkc",  P_STRING|P_VIM|P_COMMA|P_NODUP,
                      (char_u *)&p_bkc, PV_NONE,
#ifdef UNIX
                      {(char_u *)"yes", (char_u *)"auto"}
#else
                      {(char_u *)"auto", (char_u *)"auto"}
#endif
                      SCRIPTID_INIT},
    {"backupdir",   "bdir", P_STRING|P_EXPAND|P_VI_DEF|P_COMMA|P_NODUP|P_SECURE,
                      (char_u *)&p_bdir, PV_NONE,
                      {(char_u *)DFLT_BDIR, (char_u *)0L} SCRIPTID_INIT},
    {"backupext",   "bex",  P_STRING|P_VI_DEF|P_NFNAME,
                      (char_u *)&p_bex, PV_NONE,
                      {
#ifdef VMS
                      (char_u *)"_",
#else
                      (char_u *)"~",
#endif
                                  (char_u *)0L} SCRIPTID_INIT},
    {"backupskip",  "bsk",  P_STRING|P_VI_DEF|P_COMMA,
#ifdef FEAT_WILDIGN
                      (char_u *)&p_bsk, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
#ifdef FEAT_BEVAL
    {"balloondelay","bdlay",P_NUM|P_VI_DEF,
                      (char_u *)&p_bdlay, PV_NONE,
                      {(char_u *)600L, (char_u *)0L} SCRIPTID_INIT},
    {"ballooneval", "beval",P_BOOL|P_VI_DEF|P_NO_MKRC,
                      (char_u *)&p_beval, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
# ifdef FEAT_EVAL
    {"balloonexpr", "bexpr", P_STRING|P_ALLOCED|P_VI_DEF|P_VIM,
                      (char_u *)&p_bexpr, PV_BEXPR,
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
# endif
#endif
    {"beautify",    "bf",   P_BOOL|P_VI_DEF,
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"binary",        "bin",  P_BOOL|P_VI_DEF|P_RSTAT,
                      (char_u *)&p_bin, PV_BIN,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"bioskey",       "biosk",P_BOOL|P_VI_DEF,
#ifdef MSDOS
                      (char_u *)&p_biosk, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
    {"bomb",          NULL,   P_BOOL|P_NO_MKRC|P_VI_DEF|P_RSTAT,
#ifdef FEAT_MBYTE
                      (char_u *)&p_bomb, PV_BOMB,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"breakat",       "brk",  P_STRING|P_VI_DEF|P_RALL|P_FLAGLIST,
#ifdef FEAT_LINEBREAK
                      (char_u *)&p_breakat, PV_NONE,
                      {(char_u *)" \t!@*-+;:,./?", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"browsedir",   "bsdir",P_STRING|P_VI_DEF,
#ifdef FEAT_BROWSE
                      (char_u *)&p_bsdir, PV_NONE,
                      {(char_u *)"last", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"bufhidden",   "bh",   P_STRING|P_ALLOCED|P_VI_DEF|P_NOGLOB,
#if defined(FEAT_QUICKFIX)
                      (char_u *)&p_bh, PV_BH,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"buflisted",   "bl",   P_BOOL|P_VI_DEF|P_NOGLOB,
                      (char_u *)&p_bl, PV_BL,
                      {(char_u *)1L, (char_u *)0L}
                      SCRIPTID_INIT},
    {"buftype",       "bt",   P_STRING|P_ALLOCED|P_VI_DEF|P_NOGLOB,
#if defined(FEAT_QUICKFIX)
                      (char_u *)&p_bt, PV_BT,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"casemap",       "cmp",   P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_MBYTE
                      (char_u *)&p_cmp, PV_NONE,
                      {(char_u *)"internal,keepascii", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"cdpath",        "cd",   P_STRING|P_EXPAND|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_SEARCHPATH
                      (char_u *)&p_cdpath, PV_NONE,
                      {(char_u *)",,", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"cedit",         NULL,   P_STRING,
#ifdef FEAT_CMDWIN
                      (char_u *)&p_cedit, PV_NONE,
                      {(char_u *)"", (char_u *)CTRL_F_STR}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"charconvert",  "ccv", P_STRING|P_VI_DEF|P_SECURE,
#if defined(FEAT_MBYTE) && defined(FEAT_EVAL)
                      (char_u *)&p_ccv, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"cindent",       "cin",  P_BOOL|P_VI_DEF|P_VIM,
#ifdef FEAT_CINDENT
                      (char_u *)&p_cin, PV_CIN,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"cinkeys",       "cink", P_STRING|P_ALLOCED|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_CINDENT
                      (char_u *)&p_cink, PV_CINK,
                      {(char_u *)"0{,0},0),:,0#,!^F,o,O,e", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"cinoptions",  "cino", P_STRING|P_ALLOCED|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_CINDENT
                      (char_u *)&p_cino, PV_CINO,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"cinwords",    "cinw", P_STRING|P_ALLOCED|P_VI_DEF|P_COMMA|P_NODUP,
#if defined(FEAT_SMARTINDENT) || defined(FEAT_CINDENT)
                      (char_u *)&p_cinw, PV_CINW,
                      {(char_u *)"if,else,while,do,for,switch",
                        (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"clipboard",   "cb",   P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_CLIPBOARD
                      (char_u *)&p_cb, PV_NONE,
# ifdef FEAT_XCLIPBOARD
                      {(char_u *)"autoselect,exclude:cons\\|linux",
                                                 (char_u *)0L}
# else
                      {(char_u *)"", (char_u *)0L}
# endif
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"cmdheight",   "ch",   P_NUM|P_VI_DEF|P_RALL,
                      (char_u *)&p_ch, PV_NONE,
                      {(char_u *)1L, (char_u *)0L} SCRIPTID_INIT},
    {"cmdwinheight", "cwh", P_NUM|P_VI_DEF,
#ifdef FEAT_CMDWIN
                      (char_u *)&p_cwh, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)7L, (char_u *)0L} SCRIPTID_INIT},
    {"columns",       "co",   P_NUM|P_NODEFAULT|P_NO_MKRC|P_VI_DEF|P_RCLR,
                      (char_u *)&Columns, PV_NONE,
                      {(char_u *)80L, (char_u *)0L} SCRIPTID_INIT},
    {"comments",    "com",  P_STRING|P_ALLOCED|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_COMMENTS
                      (char_u *)&p_com, PV_COM,
                      {(char_u *)"s1:/*,mb:*,ex:*/,://,b:#,:%,:XCOMM,n:>,fb:-",
                        (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"commentstring", "cms", P_STRING|P_ALLOCED|P_VI_DEF,
#ifdef FEAT_FOLDING
                      (char_u *)&p_cms, PV_CMS,
                      {(char_u *)"/*%s*/", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
                      /* P_PRI_MKRC isn't needed here, optval_default()
                       * always returns TRUE for 'compatible' */
    {"compatible",  "cp",   P_BOOL|P_RALL,
                      (char_u *)&p_cp, PV_NONE,
                      {(char_u *)TRUE, (char_u *)FALSE} SCRIPTID_INIT},
    {"complete",    "cpt",  P_STRING|P_ALLOCED|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_INS_EXPAND
                      (char_u *)&p_cpt, PV_CPT,
                      {(char_u *)".,w,b,u,t,i", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"completefunc", "cfu", P_STRING|P_ALLOCED|P_VI_DEF|P_SECURE,
#ifdef FEAT_COMPL_FUNC
                      (char_u *)&p_cfu, PV_CFU,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"completeopt",   "cot",  P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_INS_EXPAND
                      (char_u *)&p_cot, PV_NONE,
                      {(char_u *)"menu,preview", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"confirm",     "cf",   P_BOOL|P_VI_DEF,
#if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
                      (char_u *)&p_confirm, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"conskey",       "consk",P_BOOL|P_VI_DEF,
#ifdef MSDOS
                      (char_u *)&p_consk, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"copyindent",  "ci",   P_BOOL|P_VI_DEF|P_VIM,
                      (char_u *)&p_ci, PV_CI,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"cpoptions",   "cpo",  P_STRING|P_VIM|P_RALL|P_FLAGLIST,
                      (char_u *)&p_cpo, PV_NONE,
                      {(char_u *)CPO_VI, (char_u *)CPO_VIM}
                      SCRIPTID_INIT},
    {"cscopepathcomp", "cspc", P_NUM|P_VI_DEF|P_VIM,
#ifdef FEAT_CSCOPE
                      (char_u *)&p_cspc, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
    {"cscopeprg",   "csprg", P_STRING|P_EXPAND|P_VI_DEF|P_SECURE,
#ifdef FEAT_CSCOPE
                      (char_u *)&p_csprg, PV_NONE,
                      {(char_u *)"cscope", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"cscopequickfix", "csqf", P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
#if defined(FEAT_CSCOPE) && defined(FEAT_QUICKFIX)
                      (char_u *)&p_csqf, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"cscopetag",   "cst",  P_BOOL|P_VI_DEF|P_VIM,
#ifdef FEAT_CSCOPE
                      (char_u *)&p_cst, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
    {"cscopetagorder", "csto", P_NUM|P_VI_DEF|P_VIM,
#ifdef FEAT_CSCOPE
                      (char_u *)&p_csto, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
    {"cscopeverbose", "csverb", P_BOOL|P_VI_DEF|P_VIM,
#ifdef FEAT_CSCOPE
                      (char_u *)&p_csverbose, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
    {"cursorcolumn", "cuc", P_BOOL|P_VI_DEF|P_RWIN,
#ifdef FEAT_SYN_HL
                      (char_u *)VAR_WIN, PV_CUC,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"cursorline",   "cul", P_BOOL|P_VI_DEF|P_RWIN,
#ifdef FEAT_SYN_HL
                      (char_u *)VAR_WIN, PV_CUL,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"debug",         NULL,   P_STRING|P_VI_DEF,
                      (char_u *)&p_debug, PV_NONE,
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"define",        "def",  P_STRING|P_ALLOCED|P_VI_DEF,
#ifdef FEAT_FIND_ID
                      (char_u *)&p_def, PV_DEF,
                      {(char_u *)"^\\s*#\\s*define", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"delcombine", "deco",  P_BOOL|P_VI_DEF|P_VIM,
#ifdef FEAT_MBYTE
                      (char_u *)&p_deco, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"dictionary",  "dict", P_STRING|P_EXPAND|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_INS_EXPAND
                      (char_u *)&p_dict, PV_DICT,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"diff",          NULL,   P_BOOL|P_VI_DEF|P_RWIN|P_NOGLOB,
#ifdef FEAT_DIFF
                      (char_u *)VAR_WIN, PV_DIFF,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"diffexpr",    "dex",  P_STRING|P_VI_DEF|P_SECURE,
#if defined(FEAT_DIFF) && defined(FEAT_EVAL)
                      (char_u *)&p_dex, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"diffopt",       "dip",  P_STRING|P_ALLOCED|P_VI_DEF|P_RWIN|P_COMMA|P_NODUP,
#ifdef FEAT_DIFF
                      (char_u *)&p_dip, PV_NONE,
                      {(char_u *)"filler", (char_u *)NULL}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)"", (char_u *)NULL}
#endif
                      SCRIPTID_INIT},
    {"digraph",       "dg",   P_BOOL|P_VI_DEF|P_VIM,
#ifdef FEAT_DIGRAPHS
                      (char_u *)&p_dg, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"directory",   "dir",  P_STRING|P_EXPAND|P_VI_DEF|P_COMMA|P_NODUP|P_SECURE,
                      (char_u *)&p_dir, PV_NONE,
                      {(char_u *)DFLT_DIR, (char_u *)0L} SCRIPTID_INIT},
    {"display",       "dy",   P_STRING|P_VI_DEF|P_COMMA|P_RALL|P_NODUP,
                      (char_u *)&p_dy, PV_NONE,
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"eadirection", "ead",  P_STRING|P_VI_DEF,
#ifdef FEAT_VERTSPLIT
                      (char_u *)&p_ead, PV_NONE,
                      {(char_u *)"both", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"edcompatible","ed",   P_BOOL|P_VI_DEF,
                      (char_u *)&p_ed, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"encoding",    "enc",  P_STRING|P_VI_DEF|P_RCLR,
#ifdef FEAT_MBYTE
                      (char_u *)&p_enc, PV_NONE,
                      {(char_u *)ENC_DFLT, (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"endofline",   "eol",  P_BOOL|P_NO_MKRC|P_VI_DEF|P_RSTAT,
                      (char_u *)&p_eol, PV_EOL,
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
    {"equalalways", "ea",   P_BOOL|P_VI_DEF|P_RALL,
                      (char_u *)&p_ea, PV_NONE,
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
    {"equalprg",    "ep",   P_STRING|P_EXPAND|P_VI_DEF|P_SECURE,
                      (char_u *)&p_ep, PV_EP,
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"errorbells",  "eb",   P_BOOL|P_VI_DEF,
                      (char_u *)&p_eb, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"errorfile",   "ef",   P_STRING|P_EXPAND|P_VI_DEF|P_SECURE,
#ifdef FEAT_QUICKFIX
                      (char_u *)&p_ef, PV_NONE,
                      {(char_u *)DFLT_ERRORFILE, (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"errorformat", "efm",  P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_QUICKFIX
                      (char_u *)&p_efm, PV_EFM,
                      {(char_u *)DFLT_EFM, (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"esckeys",       "ek",   P_BOOL|P_VIM,
                      (char_u *)&p_ek, PV_NONE,
                      {(char_u *)FALSE, (char_u *)TRUE} SCRIPTID_INIT},
    {"eventignore", "ei",   P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_AUTOCMD
                      (char_u *)&p_ei, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"expandtab",   "et",   P_BOOL|P_VI_DEF|P_VIM,
                      (char_u *)&p_et, PV_ET,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"exrc",          "ex",   P_BOOL|P_VI_DEF|P_SECURE,
                      (char_u *)&p_exrc, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"fileencoding","fenc", P_STRING|P_ALLOCED|P_VI_DEF|P_RSTAT|P_RBUF|P_NO_MKRC,
#ifdef FEAT_MBYTE
                      (char_u *)&p_fenc, PV_FENC,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"fileencodings","fencs", P_STRING|P_VI_DEF|P_COMMA,
#ifdef FEAT_MBYTE
                      (char_u *)&p_fencs, PV_NONE,
                      {(char_u *)"ucs-bom", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"fileformat",  "ff",   P_STRING|P_ALLOCED|P_VI_DEF|P_RSTAT|P_NO_MKRC,
                      (char_u *)&p_ff, PV_FF,
                      {(char_u *)DFLT_FF, (char_u *)0L} SCRIPTID_INIT},
    {"fileformats", "ffs",  P_STRING|P_VIM|P_COMMA|P_NODUP,
                      (char_u *)&p_ffs, PV_NONE,
                      {(char_u *)DFLT_FFS_VI, (char_u *)DFLT_FFS_VIM}
                      SCRIPTID_INIT},
    {"filetype",    "ft",   P_STRING|P_ALLOCED|P_VI_DEF|P_NOGLOB|P_NFNAME,
#ifdef FEAT_AUTOCMD
                      (char_u *)&p_ft, PV_FT,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"fillchars",   "fcs",  P_STRING|P_VI_DEF|P_RALL|P_COMMA|P_NODUP,
#if defined(FEAT_WINDOWS) || defined(FEAT_FOLDING)
                      (char_u *)&p_fcs, PV_NONE,
                      {(char_u *)"vert:|,fold:-", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"fkmap",         "fk",   P_BOOL|P_VI_DEF,
#ifdef FEAT_FKMAP
                      (char_u *)&p_fkmap, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"flash",         "fl",   P_BOOL|P_VI_DEF,
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
#ifdef FEAT_FOLDING
    {"foldclose",   "fcl",  P_STRING|P_VI_DEF|P_COMMA|P_NODUP|P_RWIN,
                      (char_u *)&p_fcl, PV_NONE,
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"foldcolumn",  "fdc",  P_NUM|P_VI_DEF|P_RWIN,
                      (char_u *)VAR_WIN, PV_FDC,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"foldenable",  "fen",  P_BOOL|P_VI_DEF|P_RWIN,
                      (char_u *)VAR_WIN, PV_FEN,
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
    {"foldexpr",    "fde",  P_STRING|P_ALLOCED|P_VIM|P_VI_DEF|P_RWIN,
# ifdef FEAT_EVAL
                      (char_u *)VAR_WIN, PV_FDE,
                      {(char_u *)"0", (char_u *)NULL}
# else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
# endif
                      SCRIPTID_INIT},
    {"foldignore",  "fdi",  P_STRING|P_ALLOCED|P_VIM|P_VI_DEF|P_RWIN,
                      (char_u *)VAR_WIN, PV_FDI,
                      {(char_u *)"#", (char_u *)NULL} SCRIPTID_INIT},
    {"foldlevel",   "fdl",  P_NUM|P_VI_DEF|P_RWIN,
                      (char_u *)VAR_WIN, PV_FDL,
                      {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
    {"foldlevelstart","fdls", P_NUM|P_VI_DEF,
                      (char_u *)&p_fdls, PV_NONE,
                      {(char_u *)-1L, (char_u *)0L} SCRIPTID_INIT},
    {"foldmarker",  "fmr",  P_STRING|P_ALLOCED|P_VIM|P_VI_DEF|
                                           P_RWIN|P_COMMA|P_NODUP,
                      (char_u *)VAR_WIN, PV_FMR,
                      {(char_u *)"{{{,}}}", (char_u *)NULL}
                      SCRIPTID_INIT},
    {"foldmethod",  "fdm",  P_STRING|P_ALLOCED|P_VIM|P_VI_DEF|P_RWIN,
                      (char_u *)VAR_WIN, PV_FDM,
                      {(char_u *)"manual", (char_u *)NULL} SCRIPTID_INIT},
    {"foldminlines","fml",  P_NUM|P_VI_DEF|P_RWIN,
                      (char_u *)VAR_WIN, PV_FML,
                      {(char_u *)1L, (char_u *)0L} SCRIPTID_INIT},
    {"foldnestmax", "fdn",  P_NUM|P_VI_DEF|P_RWIN,
                      (char_u *)VAR_WIN, PV_FDN,
                      {(char_u *)20L, (char_u *)0L} SCRIPTID_INIT},
    {"foldopen",    "fdo",  P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
                      (char_u *)&p_fdo, PV_NONE,
             {(char_u *)"block,hor,mark,percent,quickfix,search,tag,undo",
                                     (char_u *)0L} SCRIPTID_INIT},
    {"foldtext",    "fdt",  P_STRING|P_ALLOCED|P_VIM|P_VI_DEF|P_RWIN,
# ifdef FEAT_EVAL
                      (char_u *)VAR_WIN, PV_FDT,
                      {(char_u *)"foldtext()", (char_u *)NULL}
# else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
# endif
                      SCRIPTID_INIT},
#endif
    {"formatexpr", "fex",   P_STRING|P_ALLOCED|P_VI_DEF|P_VIM,
#ifdef FEAT_EVAL
                      (char_u *)&p_fex, PV_FEX,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"formatoptions","fo",  P_STRING|P_ALLOCED|P_VIM|P_FLAGLIST,
                      (char_u *)&p_fo, PV_FO,
                      {(char_u *)DFLT_FO_VI, (char_u *)DFLT_FO_VIM}
                      SCRIPTID_INIT},
    {"formatlistpat","flp", P_STRING|P_ALLOCED|P_VI_DEF,
                      (char_u *)&p_flp, PV_FLP,
                      {(char_u *)"^\\s*\\d\\+[\\]:.)}\\t ]\\s*",
                                     (char_u *)0L} SCRIPTID_INIT},
    {"formatprg",   "fp",   P_STRING|P_EXPAND|P_VI_DEF|P_SECURE,
                      (char_u *)&p_fp, PV_NONE,
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"fsync",       "fs",   P_BOOL|P_SECURE|P_VI_DEF,
#ifdef HAVE_FSYNC
                      (char_u *)&p_fs, PV_NONE,
                      {(char_u *)TRUE, (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"gdefault",    "gd",   P_BOOL|P_VI_DEF|P_VIM,
                      (char_u *)&p_gd, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"graphic",       "gr",   P_BOOL|P_VI_DEF,
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"grepformat",  "gfm",  P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_QUICKFIX
                      (char_u *)&p_gefm, PV_NONE,
                      {(char_u *)DFLT_GREPFORMAT, (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"grepprg",       "gp",   P_STRING|P_EXPAND|P_VI_DEF|P_SECURE,
#ifdef FEAT_QUICKFIX
                      (char_u *)&p_gp, PV_GP,
                      {
# ifdef WIN3264
                      /* may be changed to "grep -n" in os_win32.c */
                      (char_u *)"findstr /n",
# else
#  ifdef UNIX
                      /* Add an extra file name so that grep will always
                       * insert a file name in the match line. */
                      (char_u *)"grep -n $* /dev/null",
#  else
#   ifdef VMS
                      (char_u *)"SEARCH/NUMBERS ",
#   else
                      (char_u *)"grep -n ",
#   endif
#  endif
# endif
                      (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"guicursor",    "gcr",  P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef CURSOR_SHAPE
                      (char_u *)&p_guicursor, PV_NONE,
                      {
# ifdef FEAT_GUI
                        (char_u *)"n-v-c:block-Cursor/lCursor,ve:ver35-Cursor,o:hor50-Cursor,i-ci:ver25-Cursor/lCursor,r-cr:hor20-Cursor/lCursor,sm:block-Cursor-blinkwait175-blinkoff150-blinkon175",
# else      /* MSDOS or Win32 console */
                        (char_u *)"n-v-c:block,o:hor50,i-ci:hor15,r-cr:hor30,sm:block",
# endif
                            (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"guifont",       "gfn",  P_STRING|P_VI_DEF|P_RCLR|P_COMMA|P_NODUP,
#ifdef FEAT_GUI
                      (char_u *)&p_guifont, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"guifontset",  "gfs",  P_STRING|P_VI_DEF|P_RCLR|P_COMMA,
#if defined(FEAT_GUI) && defined(FEAT_XFONTSET)
                      (char_u *)&p_guifontset, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"guifontwide", "gfw",  P_STRING|P_VI_DEF|P_RCLR|P_COMMA|P_NODUP,
#if defined(FEAT_GUI) && defined(FEAT_MBYTE)
                      (char_u *)&p_guifontwide, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"guiheadroom", "ghr",  P_NUM|P_VI_DEF,
#if defined(FEAT_GUI_GTK) || defined(FEAT_GUI_X11)
                      (char_u *)&p_ghr, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)50L, (char_u *)0L} SCRIPTID_INIT},
    {"guioptions",  "go",   P_STRING|P_VI_DEF|P_RALL|P_FLAGLIST,
#if defined(FEAT_GUI)
                      (char_u *)&p_go, PV_NONE,
# if defined(UNIX) && !defined(MACOS)
                      {(char_u *)"aegimrLtT", (char_u *)0L}
# else
                      {(char_u *)"egmrLtT", (char_u *)0L}
# endif
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"guipty",        NULL,   P_BOOL|P_VI_DEF,
#if defined(FEAT_GUI)
                      (char_u *)&p_guipty, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
    {"guitablabel",  "gtl", P_STRING|P_VI_DEF|P_RWIN,
#if defined(FEAT_GUI_TABLINE)
                      (char_u *)&p_gtl, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"guitabtooltip",  "gtt", P_STRING|P_VI_DEF|P_RWIN,
#if defined(FEAT_GUI_TABLINE)
                      (char_u *)&p_gtt, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"hardtabs",    "ht",   P_NUM|P_VI_DEF,
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
    {"helpfile",    "hf",   P_STRING|P_EXPAND|P_VI_DEF|P_SECURE,
                      (char_u *)&p_hf, PV_NONE,
                      {(char_u *)DFLT_HELPFILE, (char_u *)0L}
                      SCRIPTID_INIT},
    {"helpheight",  "hh",   P_NUM|P_VI_DEF,
#ifdef FEAT_WINDOWS
                      (char_u *)&p_hh, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)20L, (char_u *)0L} SCRIPTID_INIT},
    {"helplang",    "hlg",  P_STRING|P_VI_DEF|P_COMMA,
#ifdef FEAT_MULTI_LANG
                      (char_u *)&p_hlg, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"hidden",        "hid",  P_BOOL|P_VI_DEF,
                      (char_u *)&p_hid, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"highlight",   "hl",   P_STRING|P_VI_DEF|P_RCLR|P_COMMA|P_NODUP,
                      (char_u *)&p_hl, PV_NONE,
                      {(char_u *)HIGHLIGHT_INIT, (char_u *)0L}
                      SCRIPTID_INIT},
    {"history",       "hi",   P_NUM|P_VIM,
                      (char_u *)&p_hi, PV_NONE,
                      {(char_u *)0L, (char_u *)20L} SCRIPTID_INIT},
    {"hkmap",         "hk",   P_BOOL|P_VI_DEF|P_VIM,
#ifdef FEAT_RIGHTLEFT
                      (char_u *)&p_hkmap, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"hkmapp",        "hkp",  P_BOOL|P_VI_DEF|P_VIM,
#ifdef FEAT_RIGHTLEFT
                      (char_u *)&p_hkmapp, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"hlsearch",    "hls",  P_BOOL|P_VI_DEF|P_VIM|P_RALL,
                      (char_u *)&p_hls, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"icon",          NULL,   P_BOOL|P_VI_DEF,
#ifdef FEAT_TITLE
                      (char_u *)&p_icon, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"iconstring",  NULL,   P_STRING|P_VI_DEF,
#ifdef FEAT_TITLE
                      (char_u *)&p_iconstring, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"ignorecase",  "ic",   P_BOOL|P_VI_DEF,
                      (char_u *)&p_ic, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"imactivatekey","imak",P_STRING|P_VI_DEF,
#if defined(FEAT_XIM) && defined(FEAT_GUI_GTK)
                      (char_u *)&p_imak, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"imcmdline",   "imc",  P_BOOL|P_VI_DEF,
#ifdef USE_IM_CONTROL
                      (char_u *)&p_imcmdline, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"imdisable",   "imd",  P_BOOL|P_VI_DEF,
#ifdef USE_IM_CONTROL
                      (char_u *)&p_imdisable, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
#ifdef __sgi
                      {(char_u *)TRUE, (char_u *)0L}
#else
                      {(char_u *)FALSE, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"iminsert",    "imi",  P_NUM|P_VI_DEF,
                      (char_u *)&p_iminsert, PV_IMI,
#ifdef B_IMODE_IM
                      {(char_u *)B_IMODE_IM, (char_u *)0L}
#else
                      {(char_u *)B_IMODE_NONE, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"imsearch",    "ims",  P_NUM|P_VI_DEF,
                      (char_u *)&p_imsearch, PV_IMS,
#ifdef B_IMODE_IM
                      {(char_u *)B_IMODE_IM, (char_u *)0L}
#else
                      {(char_u *)B_IMODE_NONE, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"include",       "inc",  P_STRING|P_ALLOCED|P_VI_DEF,
#ifdef FEAT_FIND_ID
                      (char_u *)&p_inc, PV_INC,
                      {(char_u *)"^\\s*#\\s*include", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"includeexpr", "inex", P_STRING|P_ALLOCED|P_VI_DEF,
#if defined(FEAT_FIND_ID) && defined(FEAT_EVAL)
                      (char_u *)&p_inex, PV_INEX,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"incsearch",   "is",   P_BOOL|P_VI_DEF|P_VIM,
                      (char_u *)&p_is, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"indentexpr", "inde",  P_STRING|P_ALLOCED|P_VI_DEF|P_VIM,
#if defined(FEAT_CINDENT) && defined(FEAT_EVAL)
                      (char_u *)&p_inde, PV_INDE,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"indentkeys", "indk",  P_STRING|P_ALLOCED|P_VI_DEF|P_COMMA|P_NODUP,
#if defined(FEAT_CINDENT) && defined(FEAT_EVAL)
                      (char_u *)&p_indk, PV_INDK,
                      {(char_u *)"0{,0},:,0#,!^F,o,O,e", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"infercase",   "inf",  P_BOOL|P_VI_DEF,
                      (char_u *)&p_inf, PV_INF,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"insertmode",  "im",   P_BOOL|P_VI_DEF|P_VIM,
                      (char_u *)&p_im, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"isfname",       "isf",  P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
                      (char_u *)&p_isf, PV_NONE,
                      {
#ifdef BACKSLASH_IN_FILENAME
                        /* Excluded are: & and ^ are special in cmd.exe
                         * ( and ) are used in text separating fnames */
                      (char_u *)"@,48-57,/,\\,.,-,_,+,,,#,$,%,{,},[,],:,@-@,!,~,=",
#else
# ifdef AMIGA
                      (char_u *)"@,48-57,/,.,-,_,+,,,$,:",
# else
#  ifdef VMS
                      (char_u *)"@,48-57,/,.,-,_,+,,,#,$,%,<,>,[,],:,;,~",
#  else /* UNIX et al. */
#   ifdef EBCDIC
                      (char_u *)"@,240-249,/,.,-,_,+,,,#,$,%,~,=",
#   else
                      (char_u *)"@,48-57,/,.,-,_,+,,,#,$,%,~,=",
#   endif
#  endif
# endif
#endif
                        (char_u *)0L} SCRIPTID_INIT},
    {"isident",       "isi",  P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
                      (char_u *)&p_isi, PV_NONE,
                      {
#if defined(MSDOS) || defined(MSWIN) || defined(OS2)
                      (char_u *)"@,48-57,_,128-167,224-235",
#else
# ifdef EBCDIC
                      /* TODO: EBCDIC Check this! @ == isalpha()*/
                      (char_u *)"@,240-249,_,66-73,81-89,98-105,"
                            "112-120,128,140-142,156,158,172,"
                            "174,186,191,203-207,219-225,235-239,"
                            "251-254",
# else
                      (char_u *)"@,48-57,_,192-255",
# endif
#endif
                        (char_u *)0L} SCRIPTID_INIT},
    {"iskeyword",   "isk",  P_STRING|P_ALLOCED|P_VIM|P_COMMA|P_NODUP,
                      (char_u *)&p_isk, PV_ISK,
                      {
#ifdef EBCDIC
                       (char_u *)"@,240-249,_",
                       /* TODO: EBCDIC Check this! @ == isalpha()*/
                       (char_u *)"@,240-249,_,66-73,81-89,98-105,"
                            "112-120,128,140-142,156,158,172,"
                            "174,186,191,203-207,219-225,235-239,"
                            "251-254",
#else
                        (char_u *)"@,48-57,_",
# if defined(MSDOS) || defined(MSWIN) || defined(OS2)
                        (char_u *)"@,48-57,_,128-167,224-235"
# else
                        ISK_LATIN1
# endif
#endif
                      } SCRIPTID_INIT},
    {"isprint",       "isp",  P_STRING|P_VI_DEF|P_RALL|P_COMMA|P_NODUP,
                      (char_u *)&p_isp, PV_NONE,
                      {
#if defined(MSDOS) || defined(MSWIN) || defined(OS2) \
            || (defined(MACOS) && !defined(MACOS_X)) \
            || defined(VMS)
                      (char_u *)"@,~-255",
#else
# ifdef EBCDIC
                      /* all chars above 63 are printable */
                      (char_u *)"63-255",
# else
                      ISP_LATIN1,
# endif
#endif
                        (char_u *)0L} SCRIPTID_INIT},
    {"joinspaces",  "js",   P_BOOL|P_VI_DEF|P_VIM,
                      (char_u *)&p_js, PV_NONE,
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
    {"key",     NULL,   P_STRING|P_ALLOCED|P_VI_DEF|P_NO_MKRC,
#ifdef FEAT_CRYPT
                      (char_u *)&p_key, PV_KEY,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"keymap",        "kmp",  P_STRING|P_ALLOCED|P_VI_DEF|P_RBUF|P_RSTAT|P_NFNAME|P_PRI_MKRC,
#ifdef FEAT_KEYMAP
                      (char_u *)&p_keymap, PV_KMAP,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"keymodel",    "km",   P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_VISUAL
                      (char_u *)&p_km, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"keywordprg",  "kp",   P_STRING|P_EXPAND|P_VI_DEF|P_SECURE,
                      (char_u *)&p_kp, PV_KP,
                      {
#if defined(MSDOS) || defined(MSWIN)
                      (char_u *)":help",
#else
#ifdef VMS
                      (char_u *)"help",
#else
# if defined(OS2)
                      (char_u *)"view /",
# else
#  ifdef USEMAN_S
                      (char_u *)"man -s",
#  else
                      (char_u *)"man",
#  endif
# endif
#endif
#endif
                        (char_u *)0L} SCRIPTID_INIT},
    {"langmap",     "lmap", P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_LANGMAP
                      (char_u *)&p_langmap, PV_NONE,
                      {(char_u *)"",      /* unmatched } */
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL,
#endif
                        (char_u *)0L} SCRIPTID_INIT},
    {"langmenu",    "lm",   P_STRING|P_VI_DEF|P_NFNAME,
#if defined(FEAT_MENU) && defined(FEAT_MULTI_LANG)
                      (char_u *)&p_lm, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"laststatus",  "ls",   P_NUM|P_VI_DEF|P_RALL,
#ifdef FEAT_WINDOWS
                      (char_u *)&p_ls, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)1L, (char_u *)0L} SCRIPTID_INIT},
    {"lazyredraw",  "lz",   P_BOOL|P_VI_DEF,
                      (char_u *)&p_lz, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"linebreak",   "lbr",  P_BOOL|P_VI_DEF|P_RWIN,
#ifdef FEAT_LINEBREAK
                      (char_u *)VAR_WIN, PV_LBR,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"lines",         NULL,   P_NUM|P_NODEFAULT|P_NO_MKRC|P_VI_DEF|P_RCLR,
                      (char_u *)&Rows, PV_NONE,
                      {
#if defined(MSDOS) || defined(WIN3264) || defined(OS2)
                      (char_u *)25L,
#else
                      (char_u *)24L,
#endif
                                  (char_u *)0L} SCRIPTID_INIT},
    {"linespace",   "lsp",  P_NUM|P_VI_DEF|P_RCLR,
#ifdef FEAT_GUI
                      (char_u *)&p_linespace, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
#ifdef FEAT_GUI_W32
                      {(char_u *)1L, (char_u *)0L}
#else
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"lisp",          NULL,   P_BOOL|P_VI_DEF,
#ifdef FEAT_LISP
                      (char_u *)&p_lisp, PV_LISP,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"lispwords",   "lw",   P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_LISP
                      (char_u *)&p_lispwords, PV_NONE,
                      {(char_u *)LISPWORD_VALUE, (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"list",          NULL,   P_BOOL|P_VI_DEF|P_RWIN,
                      (char_u *)VAR_WIN, PV_LIST,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"listchars",   "lcs",  P_STRING|P_VI_DEF|P_RALL|P_COMMA|P_NODUP,
                      (char_u *)&p_lcs, PV_NONE,
                      {(char_u *)"eol:$", (char_u *)0L} SCRIPTID_INIT},
    {"loadplugins", "lpl",  P_BOOL|P_VI_DEF,
                      (char_u *)&p_lpl, PV_NONE,
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
#ifdef FEAT_GUI_MAC
    {"macatsui",    NULL,   P_BOOL|P_VI_DEF|P_RCLR,
                      (char_u *)&p_macatsui, PV_NONE,
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
#endif
    {"magic",         NULL,   P_BOOL|P_VI_DEF,
                      (char_u *)&p_magic, PV_NONE,
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
    {"makeef",        "mef",  P_STRING|P_EXPAND|P_VI_DEF|P_SECURE,
#ifdef FEAT_QUICKFIX
                      (char_u *)&p_mef, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"makeprg",       "mp",   P_STRING|P_EXPAND|P_VI_DEF|P_SECURE,
#ifdef FEAT_QUICKFIX
                      (char_u *)&p_mp, PV_MP,
# ifdef VMS
                      {(char_u *)"MMS", (char_u *)0L}
# else
                      {(char_u *)"make", (char_u *)0L}
# endif
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"matchpairs",  "mps",  P_STRING|P_ALLOCED|P_VI_DEF|P_COMMA|P_NODUP,
                      (char_u *)&p_mps, PV_MPS,
                      {(char_u *)"(:),{:},[:]", (char_u *)0L}
                      SCRIPTID_INIT},
    {"matchtime",   "mat",  P_NUM|P_VI_DEF,
                      (char_u *)&p_mat, PV_NONE,
                      {(char_u *)5L, (char_u *)0L} SCRIPTID_INIT},
    {"maxcombine",  "mco",  P_NUM|P_VI_DEF,
#ifdef FEAT_MBYTE
                      (char_u *)&p_mco, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)2, (char_u *)0L} SCRIPTID_INIT},
    {"maxfuncdepth", "mfd", P_NUM|P_VI_DEF,
#ifdef FEAT_EVAL
                      (char_u *)&p_mfd, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)100L, (char_u *)0L} SCRIPTID_INIT},
    {"maxmapdepth", "mmd",  P_NUM|P_VI_DEF,
                      (char_u *)&p_mmd, PV_NONE,
                      {(char_u *)1000L, (char_u *)0L} SCRIPTID_INIT},
    {"maxmem",        "mm",   P_NUM|P_VI_DEF,
                      (char_u *)&p_mm, PV_NONE,
                      {(char_u *)DFLT_MAXMEM, (char_u *)0L}
                      SCRIPTID_INIT},
    {"maxmempattern","mmp", P_NUM|P_VI_DEF,
                      (char_u *)&p_mmp, PV_NONE,
                      {(char_u *)1000L, (char_u *)0L} SCRIPTID_INIT},
    {"maxmemtot",   "mmt",  P_NUM|P_VI_DEF,
                      (char_u *)&p_mmt, PV_NONE,
                      {(char_u *)DFLT_MAXMEMTOT, (char_u *)0L}
                      SCRIPTID_INIT},
    {"menuitems",   "mis",  P_NUM|P_VI_DEF,
#ifdef FEAT_MENU
                      (char_u *)&p_mis, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)25L, (char_u *)0L} SCRIPTID_INIT},
    {"mesg",          NULL,   P_BOOL|P_VI_DEF,
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"mkspellmem",  "msm",  P_STRING|P_VI_DEF|P_EXPAND|P_SECURE,
#ifdef FEAT_SPELL
                      (char_u *)&p_msm, PV_NONE,
                      {(char_u *)"460000,2000,500", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"modeline",    "ml",   P_BOOL|P_VIM,
                      (char_u *)&p_ml, PV_ML,
                      {(char_u *)FALSE, (char_u *)TRUE} SCRIPTID_INIT},
    {"modelines",   "mls",  P_NUM|P_VI_DEF,
                      (char_u *)&p_mls, PV_NONE,
                      {(char_u *)5L, (char_u *)0L} SCRIPTID_INIT},
    {"modifiable",  "ma",   P_BOOL|P_VI_DEF|P_NOGLOB,
                      (char_u *)&p_ma, PV_MA,
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
    {"modified",    "mod",  P_BOOL|P_NO_MKRC|P_VI_DEF|P_RSTAT,
                      (char_u *)&p_mod, PV_MOD,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"more",          NULL,   P_BOOL|P_VIM,
                      (char_u *)&p_more, PV_NONE,
                      {(char_u *)FALSE, (char_u *)TRUE} SCRIPTID_INIT},
    {"mouse",         NULL,   P_STRING|P_VI_DEF|P_FLAGLIST,
                      (char_u *)&p_mouse, PV_NONE,
                      {
#if defined(MSDOS) || defined(WIN3264)
                        (char_u *)"a",
#else
                        (char_u *)"",
#endif
                        (char_u *)0L} SCRIPTID_INIT},
    {"mousefocus",   "mousef", P_BOOL|P_VI_DEF,
#ifdef FEAT_GUI
                      (char_u *)&p_mousef, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"mousehide",   "mh",   P_BOOL|P_VI_DEF,
#ifdef FEAT_GUI
                      (char_u *)&p_mh, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
    {"mousemodel",  "mousem", P_STRING|P_VI_DEF,
                      (char_u *)&p_mousem, PV_NONE,
                      {
#if defined(MSDOS) || defined(MSWIN)
                        (char_u *)"popup",
#else
# if defined(MACOS)
                        (char_u *)"popup_setpos",
# else
                        (char_u *)"extend",
# endif
#endif
                        (char_u *)0L} SCRIPTID_INIT},
    {"mouseshape",  "mouses",  P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_MOUSESHAPE
                      (char_u *)&p_mouseshape, PV_NONE,
                      {(char_u *)"i-r:beam,s:updown,sd:udsizing,vs:leftright,vd:lrsizing,m:no,ml:up-arrow,v:rightup-arrow", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"mousetime",   "mouset", P_NUM|P_VI_DEF,
                      (char_u *)&p_mouset, PV_NONE,
                      {(char_u *)500L, (char_u *)0L} SCRIPTID_INIT},
    {"mzquantum",  "mzq",   P_NUM,
#ifdef FEAT_MZSCHEME
                      (char_u *)&p_mzq, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)100L, (char_u *)100L} SCRIPTID_INIT},
    {"novice",        NULL,   P_BOOL|P_VI_DEF,
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"nrformats",   "nf",   P_STRING|P_ALLOCED|P_VI_DEF|P_COMMA|P_NODUP,
                      (char_u *)&p_nf, PV_NF,
                      {(char_u *)"octal,hex", (char_u *)0L}
                      SCRIPTID_INIT},
    {"number",        "nu",   P_BOOL|P_VI_DEF|P_RWIN,
                      (char_u *)VAR_WIN, PV_NU,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"numberwidth", "nuw",  P_NUM|P_RWIN|P_VIM,
#ifdef FEAT_LINEBREAK
                      (char_u *)VAR_WIN, PV_NUW,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)8L, (char_u *)4L} SCRIPTID_INIT},
    {"omnifunc",    "ofu",  P_STRING|P_ALLOCED|P_VI_DEF|P_SECURE,
#ifdef FEAT_COMPL_FUNC
                      (char_u *)&p_ofu, PV_OFU,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"open",          NULL,   P_BOOL|P_VI_DEF,
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"opendevice",  "odev", P_BOOL|P_VI_DEF,
#if defined(MSDOS) || defined(MSWIN) || defined(OS2)
                      (char_u *)&p_odev, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)FALSE}
                      SCRIPTID_INIT},
    {"operatorfunc", "opfunc", P_STRING|P_VI_DEF|P_SECURE,
                      (char_u *)&p_opfunc, PV_NONE,
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"optimize",    "opt",  P_BOOL|P_VI_DEF,
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"osfiletype",  "oft",  P_STRING|P_ALLOCED|P_VI_DEF,
#ifdef FEAT_OSFILETYPE
                      (char_u *)&p_oft, PV_OFT,
                      {(char_u *)DFLT_OFT, (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"paragraphs",  "para", P_STRING|P_VI_DEF,
                      (char_u *)&p_para, PV_NONE,
                      {(char_u *)"IPLPPPQPP TPHPLIPpLpItpplpipbp",
                        (char_u *)0L} SCRIPTID_INIT},
    {"paste",         NULL,   P_BOOL|P_VI_DEF|P_PRI_MKRC,
                      (char_u *)&p_paste, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"pastetoggle", "pt",   P_STRING|P_VI_DEF,
                      (char_u *)&p_pt, PV_NONE,
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"patchexpr",   "pex",  P_STRING|P_VI_DEF|P_SECURE,
#if defined(FEAT_DIFF) && defined(FEAT_EVAL)
                      (char_u *)&p_pex, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"patchmode",   "pm",   P_STRING|P_VI_DEF|P_NFNAME,
                      (char_u *)&p_pm, PV_NONE,
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"path",          "pa",   P_STRING|P_EXPAND|P_VI_DEF|P_COMMA|P_NODUP,
                      (char_u *)&p_path, PV_PATH,
                      {
#if defined AMIGA || defined MSDOS || defined MSWIN
                      (char_u *)".,,",
#else
# if defined(__EMX__)
                      (char_u *)".,/emx/include,,",
# else /* Unix, probably */
                      (char_u *)".,/usr/include,,",
# endif
#endif
                        (char_u *)0L} SCRIPTID_INIT},
    {"preserveindent", "pi", P_BOOL|P_VI_DEF|P_VIM,
                      (char_u *)&p_pi, PV_PI,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"previewheight", "pvh", P_NUM|P_VI_DEF,
#if defined(FEAT_WINDOWS) && defined(FEAT_QUICKFIX)
                      (char_u *)&p_pvh, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)12L, (char_u *)0L} SCRIPTID_INIT},
    {"previewwindow", "pvw", P_BOOL|P_VI_DEF|P_RSTAT|P_NOGLOB,
#if defined(FEAT_WINDOWS) && defined(FEAT_QUICKFIX)
                      (char_u *)VAR_WIN, PV_PVW,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"printdevice", "pdev", P_STRING|P_VI_DEF|P_SECURE,
#ifdef FEAT_PRINTER
                      (char_u *)&p_pdev, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"printencoding", "penc", P_STRING|P_VI_DEF,
#ifdef FEAT_POSTSCRIPT
                      (char_u *)&p_penc, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"printexpr", "pexpr",  P_STRING|P_VI_DEF,
#ifdef FEAT_POSTSCRIPT
                      (char_u *)&p_pexpr, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"printfont", "pfn",    P_STRING|P_VI_DEF,
#ifdef FEAT_PRINTER
                      (char_u *)&p_pfn, PV_NONE,
                      {
# ifdef MSWIN
                        (char_u *)"Courier_New:h10",
# else
                        (char_u *)"courier",
# endif
                        (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"printheader", "pheader",  P_STRING|P_VI_DEF|P_GETTEXT,
#ifdef FEAT_PRINTER
                      (char_u *)&p_header, PV_NONE,
                      {(char_u *)N_("%<%f%h%m%=Page %N"), (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
   {"printmbcharset", "pmbcs",  P_STRING|P_VI_DEF,
#if defined(FEAT_POSTSCRIPT) && defined(FEAT_MBYTE)
                      (char_u *)&p_pmcs, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"printmbfont", "pmbfn",  P_STRING|P_VI_DEF,
#if defined(FEAT_POSTSCRIPT) && defined(FEAT_MBYTE)
                      (char_u *)&p_pmfn, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"printoptions", "popt", P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_PRINTER
                      (char_u *)&p_popt, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"prompt",        NULL,   P_BOOL|P_VI_DEF,
                      (char_u *)&p_prompt, PV_NONE,
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
    {"pumheight",   "ph",   P_NUM|P_VI_DEF,
#ifdef FEAT_INS_EXPAND
                      (char_u *)&p_ph, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
    {"quoteescape", "qe",   P_STRING|P_ALLOCED|P_VI_DEF,
#ifdef FEAT_TEXTOBJ
                      (char_u *)&p_qe, PV_QE,
                      {(char_u *)"\\", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"readonly",    "ro",   P_BOOL|P_VI_DEF|P_RSTAT|P_NOGLOB,
                      (char_u *)&p_ro, PV_RO,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"redraw",        NULL,   P_BOOL|P_VI_DEF,
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"redrawtime",  "rdt",  P_NUM|P_VI_DEF,
#ifdef FEAT_RELTIME
                      (char_u *)&p_rdt, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)2000L, (char_u *)0L} SCRIPTID_INIT},
    {"remap",         NULL,   P_BOOL|P_VI_DEF,
                      (char_u *)&p_remap, PV_NONE,
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
    {"report",        NULL,   P_NUM|P_VI_DEF,
                      (char_u *)&p_report, PV_NONE,
                      {(char_u *)2L, (char_u *)0L} SCRIPTID_INIT},
    {"restorescreen", "rs", P_BOOL|P_VI_DEF,
#ifdef WIN3264
                      (char_u *)&p_rs, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
    {"revins",        "ri",   P_BOOL|P_VI_DEF|P_VIM,
#ifdef FEAT_RIGHTLEFT
                      (char_u *)&p_ri, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"rightleft",   "rl",   P_BOOL|P_VI_DEF|P_RWIN,
#ifdef FEAT_RIGHTLEFT
                      (char_u *)VAR_WIN, PV_RL,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"rightleftcmd", "rlc", P_STRING|P_ALLOCED|P_VI_DEF|P_RWIN,
#ifdef FEAT_RIGHTLEFT
                      (char_u *)VAR_WIN, PV_RLC,
                      {(char_u *)"search", (char_u *)NULL}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"ruler",         "ru",   P_BOOL|P_VI_DEF|P_VIM|P_RSTAT,
#ifdef FEAT_CMDL_INFO
                      (char_u *)&p_ru, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"rulerformat", "ruf",  P_STRING|P_VI_DEF|P_ALLOCED|P_RSTAT,
#ifdef FEAT_STL_OPT
                      (char_u *)&p_ruf, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"runtimepath", "rtp",  P_STRING|P_VI_DEF|P_EXPAND|P_COMMA|P_NODUP|P_SECURE,
                      (char_u *)&p_rtp, PV_NONE,
                      {(char_u *)DFLT_RUNTIMEPATH, (char_u *)0L}
                      SCRIPTID_INIT},
    {"scroll",        "scr",  P_NUM|P_NO_MKRC|P_VI_DEF,
                      (char_u *)VAR_WIN, PV_SCROLL,
                      {(char_u *)12L, (char_u *)0L} SCRIPTID_INIT},
    {"scrollbind",  "scb",  P_BOOL|P_VI_DEF,
#ifdef FEAT_SCROLLBIND
                      (char_u *)VAR_WIN, PV_SCBIND,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"scrolljump",  "sj",   P_NUM|P_VI_DEF|P_VIM,
                      (char_u *)&p_sj, PV_NONE,
                      {(char_u *)1L, (char_u *)0L} SCRIPTID_INIT},
    {"scrolloff",   "so",   P_NUM|P_VI_DEF|P_VIM|P_RALL,
                      (char_u *)&p_so, PV_NONE,
                      {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
    {"scrollopt",   "sbo",  P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_SCROLLBIND
                      (char_u *)&p_sbo, PV_NONE,
                      {(char_u *)"ver,jump", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"sections",    "sect", P_STRING|P_VI_DEF,
                      (char_u *)&p_sections, PV_NONE,
                      {(char_u *)"SHNHH HUnhsh", (char_u *)0L}
                      SCRIPTID_INIT},
    {"secure",        NULL,   P_BOOL|P_VI_DEF|P_SECURE,
                      (char_u *)&p_secure, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"selection",   "sel",  P_STRING|P_VI_DEF,
#ifdef FEAT_VISUAL
                      (char_u *)&p_sel, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)"inclusive", (char_u *)0L}
                      SCRIPTID_INIT},
    {"selectmode",  "slm",  P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_VISUAL
                      (char_u *)&p_slm, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"sessionoptions", "ssop", P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_SESSION
                      (char_u *)&p_ssop, PV_NONE,
       {(char_u *)"blank,buffers,curdir,folds,help,options,tabpages,winsize",
                                                 (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"shell",         "sh",   P_STRING|P_EXPAND|P_VI_DEF|P_SECURE,
                      (char_u *)&p_sh, PV_NONE,
                      {
#ifdef VMS
                      (char_u *)"-",
#else
# if defined(MSDOS)
                      (char_u *)"command",
# else
#  if defined(WIN16)
                      (char_u *)"command.com",
#  else
#   if defined(WIN3264)
                      (char_u *)"", /* set in set_init_1() */
#   else
#    if defined(OS2)
                      (char_u *)"cmd.exe",
#    else
#     if defined(ARCHIE)
                      (char_u *)"gos",
#     else
                      (char_u *)"sh",
#     endif
#    endif
#   endif
#  endif
# endif
#endif /* VMS */
                        (char_u *)0L} SCRIPTID_INIT},
    {"shellcmdflag","shcf", P_STRING|P_VI_DEF|P_SECURE,
                      (char_u *)&p_shcf, PV_NONE,
                      {
#if defined(MSDOS) || defined(MSWIN)
                      (char_u *)"/c",
#else
# if defined(OS2)
                      (char_u *)"/c",
# else
                      (char_u *)"-c",
# endif
#endif
                        (char_u *)0L} SCRIPTID_INIT},
    {"shellpipe",   "sp",   P_STRING|P_VI_DEF|P_SECURE,
#ifdef FEAT_QUICKFIX
                      (char_u *)&p_sp, PV_NONE,
                      {
#if defined(UNIX) || defined(OS2)
# ifdef ARCHIE
                      (char_u *)"2>",
# else
                      (char_u *)"| tee",
# endif
#else
                      (char_u *)">",
#endif
                        (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"shellquote",  "shq",  P_STRING|P_VI_DEF|P_SECURE,
                      (char_u *)&p_shq, PV_NONE,
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"shellredir",  "srr",  P_STRING|P_VI_DEF|P_SECURE,
                      (char_u *)&p_srr, PV_NONE,
                      {(char_u *)">", (char_u *)0L} SCRIPTID_INIT},
    {"shellslash",  "ssl",   P_BOOL|P_VI_DEF,
#ifdef BACKSLASH_IN_FILENAME
                      (char_u *)&p_ssl, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"shelltemp",   "stmp", P_BOOL,
                      (char_u *)&p_stmp, PV_NONE,
                      {(char_u *)FALSE, (char_u *)TRUE} SCRIPTID_INIT},
    {"shelltype",   "st",   P_NUM|P_VI_DEF,
#ifdef AMIGA
                      (char_u *)&p_st, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
    {"shellxquote", "sxq",  P_STRING|P_VI_DEF|P_SECURE,
                      (char_u *)&p_sxq, PV_NONE,
                      {
#if defined(UNIX) && defined(USE_SYSTEM) && !defined(__EMX__)
                      (char_u *)"\"",
#else
                      (char_u *)"",
#endif
                        (char_u *)0L} SCRIPTID_INIT},
    {"shiftround",  "sr",   P_BOOL|P_VI_DEF|P_VIM,
                      (char_u *)&p_sr, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"shiftwidth",  "sw",   P_NUM|P_VI_DEF,
                      (char_u *)&p_sw, PV_SW,
                      {(char_u *)8L, (char_u *)0L} SCRIPTID_INIT},
    {"shortmess",   "shm",  P_STRING|P_VIM|P_FLAGLIST,
                      (char_u *)&p_shm, PV_NONE,
                      {(char_u *)"", (char_u *)"filnxtToO"}
                      SCRIPTID_INIT},
    {"shortname",   "sn",   P_BOOL|P_VI_DEF,
#ifdef SHORT_FNAME
                      (char_u *)NULL, PV_NONE,
#else
                      (char_u *)&p_sn, PV_SN,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"showbreak",   "sbr",  P_STRING|P_VI_DEF|P_RALL,
#ifdef FEAT_LINEBREAK
                      (char_u *)&p_sbr, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"showcmd",       "sc",   P_BOOL|P_VIM,
#ifdef FEAT_CMDL_INFO
                      (char_u *)&p_sc, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE,
#ifdef UNIX
                        (char_u *)FALSE
#else
                        (char_u *)TRUE
#endif
                        } SCRIPTID_INIT},
    {"showfulltag", "sft",  P_BOOL|P_VI_DEF,
                      (char_u *)&p_sft, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"showmatch",   "sm",   P_BOOL|P_VI_DEF,
                      (char_u *)&p_sm, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"showmode",    "smd",  P_BOOL|P_VIM,
                      (char_u *)&p_smd, PV_NONE,
                      {(char_u *)FALSE, (char_u *)TRUE} SCRIPTID_INIT},
    {"showtabline", "stal", P_NUM|P_VI_DEF|P_RALL,
#ifdef FEAT_WINDOWS
                      (char_u *)&p_stal, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)1L, (char_u *)0L} SCRIPTID_INIT},
    {"sidescroll",  "ss",   P_NUM|P_VI_DEF,
                      (char_u *)&p_ss, PV_NONE,
                      {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
    {"sidescrolloff", "siso", P_NUM|P_VI_DEF|P_VIM|P_RBUF,
                      (char_u *)&p_siso, PV_NONE,
                      {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
    {"slowopen",    "slow", P_BOOL|P_VI_DEF,
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"smartcase",   "scs",  P_BOOL|P_VI_DEF|P_VIM,
                      (char_u *)&p_scs, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"smartindent", "si",   P_BOOL|P_VI_DEF|P_VIM,
#ifdef FEAT_SMARTINDENT
                      (char_u *)&p_si, PV_SI,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"smarttab",    "sta",  P_BOOL|P_VI_DEF|P_VIM,
                      (char_u *)&p_sta, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"softtabstop", "sts",  P_NUM|P_VI_DEF|P_VIM,
                      (char_u *)&p_sts, PV_STS,
                      {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
    {"sourceany",   NULL,   P_BOOL|P_VI_DEF,
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"spell",         NULL,   P_BOOL|P_VI_DEF|P_RWIN,
#ifdef FEAT_SPELL
                      (char_u *)VAR_WIN, PV_SPELL,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"spellcapcheck", "spc", P_STRING|P_ALLOCED|P_VI_DEF|P_RBUF,
#ifdef FEAT_SPELL
                      (char_u *)&p_spc, PV_SPC,
                      {(char_u *)"[.?!]\\_[\\])'\"     ]\\+", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"spellfile",   "spf",  P_STRING|P_EXPAND|P_ALLOCED|P_VI_DEF|P_SECURE|P_COMMA,
#ifdef FEAT_SPELL
                      (char_u *)&p_spf, PV_SPF,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"spelllang",   "spl",  P_STRING|P_ALLOCED|P_VI_DEF|P_COMMA|P_RBUF|P_EXPAND,
#ifdef FEAT_SPELL
                      (char_u *)&p_spl, PV_SPL,
                      {(char_u *)"en", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"spellsuggest", "sps", P_STRING|P_VI_DEF|P_EXPAND|P_SECURE|P_COMMA,
#ifdef FEAT_SPELL
                      (char_u *)&p_sps, PV_NONE,
                      {(char_u *)"best", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"splitbelow",  "sb",   P_BOOL|P_VI_DEF,
#ifdef FEAT_WINDOWS
                      (char_u *)&p_sb, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"splitright",  "spr",  P_BOOL|P_VI_DEF,
#ifdef FEAT_VERTSPLIT
                      (char_u *)&p_spr, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"startofline", "sol",  P_BOOL|P_VI_DEF|P_VIM,
                      (char_u *)&p_sol, PV_NONE,
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
    {"statusline"  ,"stl",  P_STRING|P_VI_DEF|P_ALLOCED|P_RSTAT,
#ifdef FEAT_STL_OPT
                      (char_u *)&p_stl, PV_STL,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"suffixes",    "su",   P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
                      (char_u *)&p_su, PV_NONE,
                      {(char_u *)".bak,~,.o,.h,.info,.swp,.obj",
                        (char_u *)0L} SCRIPTID_INIT},
    {"suffixesadd", "sua",  P_STRING|P_VI_DEF|P_ALLOCED|P_COMMA|P_NODUP,
#ifdef FEAT_SEARCHPATH
                      (char_u *)&p_sua, PV_SUA,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"swapfile",    "swf",  P_BOOL|P_VI_DEF|P_RSTAT,
                      (char_u *)&p_swf, PV_SWF,
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
    {"swapsync",    "sws",  P_STRING|P_VI_DEF,
                      (char_u *)&p_sws, PV_NONE,
                      {(char_u *)"fsync", (char_u *)0L} SCRIPTID_INIT},
    {"switchbuf",   "swb",  P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
                      (char_u *)&p_swb, PV_NONE,
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"synmaxcol",   "smc",  P_NUM|P_VI_DEF|P_RBUF,
#ifdef FEAT_SYN_HL
                      (char_u *)&p_smc, PV_SMC,
                      {(char_u *)3000L, (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"syntax",        "syn",  P_STRING|P_ALLOCED|P_VI_DEF|P_NOGLOB|P_NFNAME,
#ifdef FEAT_SYN_HL
                      (char_u *)&p_syn, PV_SYN,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"tabline",       "tal",  P_STRING|P_VI_DEF|P_RALL,
#ifdef FEAT_STL_OPT
                      (char_u *)&p_tal, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"tabpagemax",  "tpm",  P_NUM|P_VI_DEF,
#ifdef FEAT_WINDOWS
                      (char_u *)&p_tpm, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)10L, (char_u *)0L} SCRIPTID_INIT},
    {"tabstop",       "ts",   P_NUM|P_VI_DEF|P_RBUF,
                      (char_u *)&p_ts, PV_TS,
                      {(char_u *)8L, (char_u *)0L} SCRIPTID_INIT},
    {"tagbsearch",  "tbs",   P_BOOL|P_VI_DEF,
                      (char_u *)&p_tbs, PV_NONE,
#ifdef VMS  /* binary searching doesn't appear to work on VMS */
                      {(char_u *)0L, (char_u *)0L}
#else
                      {(char_u *)TRUE, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"taglength",   "tl",   P_NUM|P_VI_DEF,
                      (char_u *)&p_tl, PV_NONE,
                      {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
    {"tagrelative", "tr",   P_BOOL|P_VIM,
                      (char_u *)&p_tr, PV_NONE,
                      {(char_u *)FALSE, (char_u *)TRUE} SCRIPTID_INIT},
    {"tags",          "tag",  P_STRING|P_EXPAND|P_VI_DEF|P_COMMA|P_NODUP,
                      (char_u *)&p_tags, PV_TAGS,
                      {
#if defined(FEAT_EMACS_TAGS) && !defined(CASE_INSENSITIVE_FILENAME)
                      (char_u *)"./tags,./TAGS,tags,TAGS",
#else
                      (char_u *)"./tags,tags",
#endif
                        (char_u *)0L} SCRIPTID_INIT},
    {"tagstack",    "tgst", P_BOOL|P_VI_DEF,
                      (char_u *)&p_tgst, PV_NONE,
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
    {"term",          NULL,   P_STRING|P_EXPAND|P_NODEFAULT|P_NO_MKRC|P_VI_DEF|P_RALL,
                      (char_u *)&T_NAME, PV_NONE,
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"termbidi", "tbidi",   P_BOOL|P_VI_DEF,
#ifdef FEAT_ARABIC
                      (char_u *)&p_tbidi, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"termencoding", "tenc", P_STRING|P_VI_DEF|P_RCLR,
#ifdef FEAT_MBYTE
                      (char_u *)&p_tenc, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"terse",         NULL,   P_BOOL|P_VI_DEF,
                      (char_u *)&p_terse, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"textauto",    "ta",   P_BOOL|P_VIM,
                      (char_u *)&p_ta, PV_NONE,
                      {(char_u *)DFLT_TEXTAUTO, (char_u *)TRUE}
                      SCRIPTID_INIT},
    {"textmode",    "tx",   P_BOOL|P_VI_DEF|P_NO_MKRC,
                      (char_u *)&p_tx, PV_TX,
                      {
#ifdef USE_CRNL
                      (char_u *)TRUE,
#else
                      (char_u *)FALSE,
#endif
                        (char_u *)0L} SCRIPTID_INIT},
    {"textwidth",   "tw",   P_NUM|P_VI_DEF|P_VIM,
                      (char_u *)&p_tw, PV_TW,
                      {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
    {"thesaurus",   "tsr",  P_STRING|P_EXPAND|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_INS_EXPAND
                      (char_u *)&p_tsr, PV_TSR,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"tildeop",       "top",  P_BOOL|P_VI_DEF|P_VIM,
                      (char_u *)&p_to, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"timeout",       "to",   P_BOOL|P_VI_DEF,
                      (char_u *)&p_timeout, PV_NONE,
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
    {"timeoutlen",  "tm",   P_NUM|P_VI_DEF,
                      (char_u *)&p_tm, PV_NONE,
                      {(char_u *)1000L, (char_u *)0L} SCRIPTID_INIT},
    {"title",         NULL,   P_BOOL|P_VI_DEF,
#ifdef FEAT_TITLE
                      (char_u *)&p_title, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"titlelen",    NULL,   P_NUM|P_VI_DEF,
#ifdef FEAT_TITLE
                      (char_u *)&p_titlelen, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)85L, (char_u *)0L} SCRIPTID_INIT},
    {"titleold",    NULL,   P_STRING|P_VI_DEF|P_GETTEXT|P_SECURE|P_NO_MKRC,
#ifdef FEAT_TITLE
                      (char_u *)&p_titleold, PV_NONE,
                      {(char_u *)N_("Thanks for flying Vim"),
                                                 (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"titlestring", NULL,   P_STRING|P_VI_DEF,
#ifdef FEAT_TITLE
                      (char_u *)&p_titlestring, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
#if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_W32)
    {"toolbar",     "tb",   P_STRING|P_COMMA|P_VI_DEF|P_NODUP,
                      (char_u *)&p_toolbar, PV_NONE,
                      {(char_u *)"icons,tooltips", (char_u *)0L}
                      SCRIPTID_INIT},
#endif
#if defined(FEAT_TOOLBAR) && defined(FEAT_GUI_GTK) && defined(HAVE_GTK2)
    {"toolbariconsize", "tbis", P_STRING|P_VI_DEF,
                      (char_u *)&p_tbis, PV_NONE,
                      {(char_u *)"small", (char_u *)0L} SCRIPTID_INIT},
#endif
    {"ttimeout",    NULL,   P_BOOL|P_VI_DEF|P_VIM,
                      (char_u *)&p_ttimeout, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"ttimeoutlen", "ttm",  P_NUM|P_VI_DEF,
                      (char_u *)&p_ttm, PV_NONE,
                      {(char_u *)-1L, (char_u *)0L} SCRIPTID_INIT},
    {"ttybuiltin",  "tbi",  P_BOOL|P_VI_DEF,
                      (char_u *)&p_tbi, PV_NONE,
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
    {"ttyfast",       "tf",   P_BOOL|P_NO_MKRC|P_VI_DEF,
                      (char_u *)&p_tf, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"ttymouse",    "ttym", P_STRING|P_NODEFAULT|P_NO_MKRC|P_VI_DEF,
#if defined(FEAT_MOUSE) && (defined(UNIX) || defined(VMS))
                      (char_u *)&p_ttym, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"ttyscroll",   "tsl",  P_NUM|P_VI_DEF,
                      (char_u *)&p_ttyscroll, PV_NONE,
                      {(char_u *)999L, (char_u *)0L} SCRIPTID_INIT},
    {"ttytype",       "tty",  P_STRING|P_EXPAND|P_NODEFAULT|P_NO_MKRC|P_VI_DEF|P_RALL,
                      (char_u *)&T_NAME, PV_NONE,
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"undolevels",  "ul",   P_NUM|P_VI_DEF,
                      (char_u *)&p_ul, PV_NONE,
                      {
#if defined(UNIX) || defined(WIN3264) || defined(OS2) || defined(VMS)
                      (char_u *)1000L,
#else
                      (char_u *)100L,
#endif
                        (char_u *)0L} SCRIPTID_INIT},
    {"updatecount", "uc",   P_NUM|P_VI_DEF,
                      (char_u *)&p_uc, PV_NONE,
                      {(char_u *)200L, (char_u *)0L} SCRIPTID_INIT},
    {"updatetime",  "ut",   P_NUM|P_VI_DEF,
                      (char_u *)&p_ut, PV_NONE,
                      {(char_u *)4000L, (char_u *)0L} SCRIPTID_INIT},
    {"verbose",       "vbs",  P_NUM|P_VI_DEF,
                      (char_u *)&p_verbose, PV_NONE,
                      {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
    {"verbosefile", "vfile", P_STRING|P_EXPAND|P_VI_DEF|P_SECURE,
                      (char_u *)&p_vfile, PV_NONE,
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"viewdir",     "vdir", P_STRING|P_EXPAND|P_VI_DEF|P_SECURE,
#ifdef FEAT_SESSION
                      (char_u *)&p_vdir, PV_NONE,
                      {(char_u *)DFLT_VDIR, (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"viewoptions", "vop",  P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_SESSION
                      (char_u *)&p_vop, PV_NONE,
                      {(char_u *)"folds,options,cursor", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"viminfo",       "vi",   P_STRING|P_COMMA|P_NODUP|P_SECURE,
#ifdef FEAT_VIMINFO
                      (char_u *)&p_viminfo, PV_NONE,
#if defined(MSDOS) || defined(MSWIN) || defined(OS2)
                      {(char_u *)"", (char_u *)"'100,<50,s10,h,rA:,rB:"}
#else
# ifdef AMIGA
                      {(char_u *)"",
                         (char_u *)"'100,<50,s10,h,rdf0:,rdf1:,rdf2:"}
# else
                      {(char_u *)"", (char_u *)"'100,<50,s10,h"}
# endif
#endif
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"virtualedit", "ve",   P_STRING|P_COMMA|P_NODUP|P_VI_DEF|P_VIM,
#ifdef FEAT_VIRTUALEDIT
                      (char_u *)&p_ve, PV_NONE,
                      {(char_u *)"", (char_u *)""}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"visualbell",  "vb",   P_BOOL|P_VI_DEF,
                      (char_u *)&p_vb, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"w300",          NULL,   P_NUM|P_VI_DEF,
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
    {"w1200",         NULL,   P_NUM|P_VI_DEF,
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
    {"w9600",         NULL,   P_NUM|P_VI_DEF,
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
    {"warn",          NULL,   P_BOOL|P_VI_DEF,
                      (char_u *)&p_warn, PV_NONE,
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
    {"weirdinvert", "wiv",  P_BOOL|P_VI_DEF|P_RCLR,
                      (char_u *)&p_wiv, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"whichwrap",   "ww",   P_STRING|P_VIM|P_COMMA|P_FLAGLIST,
                      (char_u *)&p_ww, PV_NONE,
                      {(char_u *)"", (char_u *)"b,s"} SCRIPTID_INIT},
    {"wildchar",    "wc",   P_NUM|P_VIM,
                      (char_u *)&p_wc, PV_NONE,
                      {(char_u *)(long)Ctrl_E, (char_u *)(long)TAB}
                      SCRIPTID_INIT},
    {"wildcharm",   "wcm",   P_NUM|P_VI_DEF,
                      (char_u *)&p_wcm, PV_NONE,
                      {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
    {"wildignore",  "wig",  P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
#ifdef FEAT_WILDIGN
                      (char_u *)&p_wig, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
    {"wildmenu",    "wmnu", P_BOOL|P_VI_DEF,
#ifdef FEAT_WILDMENU
                      (char_u *)&p_wmnu, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"wildmode",    "wim",  P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
                      (char_u *)&p_wim, PV_NONE,
                      {(char_u *)"full", (char_u *)0L} SCRIPTID_INIT},
    {"wildoptions", "wop",  P_STRING|P_VI_DEF,
#ifdef FEAT_CMDL_COMPL
                      (char_u *)&p_wop, PV_NONE,
                      {(char_u *)"", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"winaltkeys",  "wak",  P_STRING|P_VI_DEF,
#ifdef FEAT_WAK
                      (char_u *)&p_wak, PV_NONE,
                      {(char_u *)"menu", (char_u *)0L}
#else
                      (char_u *)NULL, PV_NONE,
                      {(char_u *)NULL, (char_u *)0L}
#endif
                      SCRIPTID_INIT},
    {"window",        "wi",   P_NUM|P_VI_DEF,
                      (char_u *)&p_window, PV_NONE,
                      {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
    {"winheight",   "wh",   P_NUM|P_VI_DEF,
#ifdef FEAT_WINDOWS
                      (char_u *)&p_wh, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)1L, (char_u *)0L} SCRIPTID_INIT},
    {"winfixheight", "wfh", P_BOOL|P_VI_DEF|P_RSTAT,
#ifdef FEAT_WINDOWS
                      (char_u *)VAR_WIN, PV_WFH,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"winfixwidth", "wfw", P_BOOL|P_VI_DEF|P_RSTAT,
#ifdef FEAT_VERTSPLIT
                      (char_u *)VAR_WIN, PV_WFW,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"winminheight", "wmh", P_NUM|P_VI_DEF,
#ifdef FEAT_WINDOWS
                      (char_u *)&p_wmh, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)1L, (char_u *)0L} SCRIPTID_INIT},
    {"winminwidth", "wmw", P_NUM|P_VI_DEF,
#ifdef FEAT_VERTSPLIT
                      (char_u *)&p_wmw, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)1L, (char_u *)0L} SCRIPTID_INIT},
    {"winwidth",   "wiw",   P_NUM|P_VI_DEF,
#ifdef FEAT_VERTSPLIT
                      (char_u *)&p_wiw, PV_NONE,
#else
                      (char_u *)NULL, PV_NONE,
#endif
                      {(char_u *)20L, (char_u *)0L} SCRIPTID_INIT},
    {"wrap",          NULL,   P_BOOL|P_VI_DEF|P_RWIN,
                      (char_u *)VAR_WIN, PV_WRAP,
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
    {"wrapmargin",  "wm",   P_NUM|P_VI_DEF,
                      (char_u *)&p_wm, PV_WM,
                      {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
    {"wrapscan",    "ws",   P_BOOL|P_VI_DEF,
                      (char_u *)&p_ws, PV_NONE,
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
    {"write",         NULL,   P_BOOL|P_VI_DEF,
                      (char_u *)&p_write, PV_NONE,
                      {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
    {"writeany",    "wa",   P_BOOL|P_VI_DEF,
                      (char_u *)&p_wa, PV_NONE,
                      {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
    {"writebackup", "wb",   P_BOOL|P_VI_DEF|P_VIM,
                      (char_u *)&p_wb, PV_NONE,
                      {
#ifdef FEAT_WRITEBACKUP
                      (char_u *)TRUE,
#else
                      (char_u *)FALSE,
#endif
                        (char_u *)0L} SCRIPTID_INIT},
    {"writedelay",  "wd",   P_NUM|P_VI_DEF,
                      (char_u *)&p_wd, PV_NONE,
                      {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},

/* terminal output codes */
#define p_term(sss, vvv)   {sss, NULL, P_STRING|P_VI_DEF|P_RALL|P_SECURE, \
                      (char_u *)&vvv, PV_NONE, \
                      {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},

    p_term("t_AB", T_CAB)
    p_term("t_AF", T_CAF)
    p_term("t_AL", T_CAL)
    p_term("t_al", T_AL)
    p_term("t_bc", T_BC)
    p_term("t_cd", T_CD)
    p_term("t_ce", T_CE)
    p_term("t_cl", T_CL)
    p_term("t_cm", T_CM)
    p_term("t_Co", T_CCO)
    p_term("t_CS", T_CCS)
    p_term("t_cs", T_CS)
#ifdef FEAT_VERTSPLIT
    p_term("t_CV", T_CSV)
#endif
    p_term("t_ut", T_UT)
    p_term("t_da", T_DA)
    p_term("t_db", T_DB)
    p_term("t_DL", T_CDL)
    p_term("t_dl", T_DL)
    p_term("t_fs", T_FS)
    p_term("t_IE", T_CIE)
    p_term("t_IS", T_CIS)
    p_term("t_ke", T_KE)
    p_term("t_ks", T_KS)
    p_term("t_le", T_LE)
    p_term("t_mb", T_MB)
    p_term("t_md", T_MD)
    p_term("t_me", T_ME)
    p_term("t_mr", T_MR)
    p_term("t_ms", T_MS)
    p_term("t_nd", T_ND)
    p_term("t_op", T_OP)
    p_term("t_RI", T_CRI)
    p_term("t_RV", T_CRV)
    p_term("t_Sb", T_CSB)
    p_term("t_Sf", T_CSF)
    p_term("t_se", T_SE)
    p_term("t_so", T_SO)
    p_term("t_sr", T_SR)
    p_term("t_ts", T_TS)
    p_term("t_te", T_TE)
    p_term("t_ti", T_TI)
    p_term("t_ue", T_UE)
    p_term("t_us", T_US)
    p_term("t_vb", T_VB)
    p_term("t_ve", T_VE)
    p_term("t_vi", T_VI)
    p_term("t_vs", T_VS)
    p_term("t_WP", T_CWP)
    p_term("t_WS", T_CWS)
    p_term("t_SI", T_CSI)
    p_term("t_EI", T_CEI)
    p_term("t_xs", T_XS)
    p_term("t_ZH", T_CZH)
    p_term("t_ZR", T_CZR)

/* terminal key codes are not in here */

    /* end marker */
    {NULL, NULL, 0, NULL, PV_NONE, {NULL, NULL} SCRIPTID_INIT}
};

#define PARAM_COUNT (sizeof(options) / sizeof(struct vimoption))

#ifdef FEAT_MBYTE
static char *(p_ambw_values[]) = {"single", "double", NULL};
#endif
static char *(p_bg_values[]) = {"light", "dark", NULL};
static char *(p_nf_values[]) = {"octal", "hex", "alpha", NULL};
static char *(p_ff_values[]) = {FF_UNIX, FF_DOS, FF_MAC, NULL};
#ifdef FEAT_CMDL_COMPL
static char *(p_wop_values[]) = {"tagfile", NULL};
#endif
#ifdef FEAT_WAK
static char *(p_wak_values[]) = {"yes", "menu", "no", NULL};
#endif
static char *(p_mousem_values[]) = {"extend", "popup", "popup_setpos", "mac", NULL};
#ifdef FEAT_VISUAL
static char *(p_sel_values[]) = {"inclusive", "exclusive", "old", NULL};
static char *(p_slm_values[]) = {"mouse", "key", "cmd", NULL};
#endif
#ifdef FEAT_VISUAL
static char *(p_km_values[]) = {"startsel", "stopsel", NULL};
#endif
#ifdef FEAT_BROWSE
static char *(p_bsdir_values[]) = {"current", "last", "buffer", NULL};
#endif
#ifdef FEAT_SCROLLBIND
static char *(p_scbopt_values[]) = {"ver", "hor", "jump", NULL};
#endif
static char *(p_debug_values[]) = {"msg", "throw", "beep", NULL};
#ifdef FEAT_VERTSPLIT
static char *(p_ead_values[]) = {"both", "ver", "hor", NULL};
#endif
#if defined(FEAT_QUICKFIX)
# ifdef FEAT_AUTOCMD
static char *(p_buftype_values[]) = {"nofile", "nowrite", "quickfix", "help", "acwrite", NULL};
# else
static char *(p_buftype_values[]) = {"nofile", "nowrite", "quickfix", "help", NULL};
# endif
static char *(p_bufhidden_values[]) = {"hide", "unload", "delete", "wipe", NULL};
#endif
static char *(p_bs_values[]) = {"indent", "eol", "start", NULL};
#ifdef FEAT_FOLDING
static char *(p_fdm_values[]) = {"manual", "expr", "marker", "indent", "syntax",
# ifdef FEAT_DIFF
                        "diff",
# endif
                        NULL};
static char *(p_fcl_values[]) = {"all", NULL};
#endif
#ifdef FEAT_INS_EXPAND
static char *(p_cot_values[]) = {"menu", "menuone", "longest", "preview", NULL};
#endif

static void set_option_default __ARGS((int, int opt_flags, int compatible));
static void set_options_default __ARGS((int opt_flags));
static char_u *term_bg_default __ARGS((void));
static void did_set_option __ARGS((int opt_idx, int opt_flags, int new_value));
static char_u *illegal_char __ARGS((char_u *, int));
static int string_to_key __ARGS((char_u *arg));
#ifdef FEAT_CMDWIN
static char_u *check_cedit __ARGS((void));
#endif
#ifdef FEAT_TITLE
static void did_set_title __ARGS((int icon));
#endif
static char_u *option_expand __ARGS((int opt_idx, char_u *val));
static void didset_options __ARGS((void));
static void check_string_option __ARGS((char_u **pp));
#if defined(FEAT_EVAL) || defined(PROTO)
static long_u *insecure_flag __ARGS((int opt_idx, int opt_flags));
#else
# define insecure_flag(opt_idx, opt_flags) (&options[opt_idx].flags)
#endif
static void set_string_option_global __ARGS((int opt_idx, char_u **varp));
static void set_string_option __ARGS((int opt_idx, char_u *value, int opt_flags));
static char_u *did_set_string_option __ARGS((int opt_idx, char_u **varp, int new_value_alloced, char_u *oldval, char_u *errbuf, int opt_flags));
static char_u *set_chars_option __ARGS((char_u **varp));
#ifdef FEAT_CLIPBOARD
static char_u *check_clipboard_option __ARGS((void));
#endif
#ifdef FEAT_SPELL
static char_u *compile_cap_prog __ARGS((buf_T *buf));
#endif
#ifdef FEAT_EVAL
static void set_option_scriptID_idx __ARGS((int opt_idx, int opt_flags, int id));
#endif
static char_u *set_bool_option __ARGS((int opt_idx, char_u *varp, int value, int opt_flags));
static char_u *set_num_option __ARGS((int opt_idx, char_u *varp, long value, char_u *errbuf, size_t errbuflen, int opt_flags));
static void check_redraw __ARGS((long_u flags));
static int findoption __ARGS((char_u *));
static int find_key_option __ARGS((char_u *));
static void showoptions __ARGS((int all, int opt_flags));
static int optval_default __ARGS((struct vimoption *, char_u *varp));
static void showoneopt __ARGS((struct vimoption *, int opt_flags));
static int put_setstring __ARGS((FILE *fd, char *cmd, char *name, char_u **valuep, int expand));
static int put_setnum __ARGS((FILE *fd, char *cmd, char *name, long *valuep));
static int put_setbool __ARGS((FILE *fd, char *cmd, char *name, int value));
static int  istermoption __ARGS((struct vimoption *));
static char_u *get_varp_scope __ARGS((struct vimoption *p, int opt_flags));
static char_u *get_varp __ARGS((struct vimoption *));
static void option_value2string __ARGS((struct vimoption *, int opt_flags));
static int wc_use_keyname __ARGS((char_u *varp, long *wcp));
#ifdef FEAT_LANGMAP
static void langmap_init __ARGS((void));
static void langmap_set __ARGS((void));
#endif
static void paste_option_changed __ARGS((void));
static void compatible_set __ARGS((void));
#ifdef FEAT_LINEBREAK
static void fill_breakat_flags __ARGS((void));
#endif
static int opt_strings_flags __ARGS((char_u *val, char **values, unsigned *flagp, int list));
static int check_opt_strings __ARGS((char_u *val, char **values, int));
static int check_opt_wim __ARGS((void));

/*
 * Initialize the options, first part.
 *
 * Called only once from main(), just after creating the first buffer.
 */
    void
set_init_1()
{
    char_u  *p;
    int           opt_idx;
    long_u  n;

#ifdef FEAT_LANGMAP
    langmap_init();
#endif

    /* Be Vi compatible by default */
    p_cp = TRUE;

    /* Use POSIX compatibility when $VIM_POSIX is set. */
    if (mch_getenv((char_u *)"VIM_POSIX") != NULL)
    {
      set_string_default("cpo", (char_u *)CPO_ALL);
      set_string_default("shm", (char_u *)"A");
    }

    /*
     * Find default value for 'shell' option.
     * Don't use it if it is empty.
     */
    if (((p = mch_getenv((char_u *)"SHELL")) != NULL && *p != NUL)
#if defined(MSDOS) || defined(MSWIN) || defined(OS2)
# ifdef __EMX__
          || ((p = mch_getenv((char_u *)"EMXSHELL")) != NULL && *p != NUL)
# endif
          || ((p = mch_getenv((char_u *)"COMSPEC")) != NULL && *p != NUL)
# ifdef WIN3264
          || ((p = default_shell()) != NULL && *p != NUL)
# endif
#endif
          )
      set_string_default("sh", p);

#ifdef FEAT_WILDIGN
    /*
     * Set the default for 'backupskip' to include environment variables for
     * temp files.
     */
    {
# ifdef UNIX
      static char *(names[4]) = {"", "TMPDIR", "TEMP", "TMP"};
# else
      static char *(names[3]) = {"TMPDIR", "TEMP", "TMP"};
# endif
      int         len;
      garray_T    ga;
      int         mustfree;

      ga_init2(&ga, 1, 100);
      for (n = 0; n < (long)(sizeof(names) / sizeof(char *)); ++n)
      {
          mustfree = FALSE;
# ifdef UNIX
          if (*names[n] == NUL)
            p = (char_u *)"/tmp";
          else
# endif
            p = vim_getenv((char_u *)names[n], &mustfree);
          if (p != NULL && *p != NUL)
          {
            /* First time count the NUL, otherwise count the ','. */
            len = (int)STRLEN(p) + 3;
            if (ga_grow(&ga, len) == OK)
            {
                if (ga.ga_len > 0)
                  STRCAT(ga.ga_data, ",");
                STRCAT(ga.ga_data, p);
                add_pathsep(ga.ga_data);
                STRCAT(ga.ga_data, "*");
                ga.ga_len += len;
            }
          }
          if (mustfree)
            vim_free(p);
      }
      if (ga.ga_data != NULL)
      {
          set_string_default("bsk", ga.ga_data);
          vim_free(ga.ga_data);
      }
    }
#endif

    /*
     * 'maxmemtot' and 'maxmem' may have to be adjusted for available memory
     */
    opt_idx = findoption((char_u *)"maxmemtot");
    if (opt_idx >= 0)
    {
#if !defined(HAVE_AVAIL_MEM) && !defined(HAVE_TOTAL_MEM)
      if (options[opt_idx].def_val[VI_DEFAULT] == (char_u *)0L)
#endif
      {
#ifdef HAVE_AVAIL_MEM
          /* Use amount of memory available at this moment. */
          n = (mch_avail_mem(FALSE) >> 11);
#else
# ifdef HAVE_TOTAL_MEM
          /* Use amount of memory available to Vim. */
          n = (mch_total_mem(FALSE) >> 1);
# else
          n = (0x7fffffff >> 11);
# endif
#endif
          options[opt_idx].def_val[VI_DEFAULT] = (char_u *)n;
          opt_idx = findoption((char_u *)"maxmem");
          if (opt_idx >= 0)
          {
#if !defined(HAVE_AVAIL_MEM) && !defined(HAVE_TOTAL_MEM)
            if ((long)options[opt_idx].def_val[VI_DEFAULT] > n
                  || (long)options[opt_idx].def_val[VI_DEFAULT] == 0L)
#endif
                options[opt_idx].def_val[VI_DEFAULT] = (char_u *)n;
          }
      }
    }

#ifdef FEAT_GUI_W32
    /* force 'shortname' for Win32s */
    if (gui_is_win32s())
    {
      opt_idx = findoption((char_u *)"shortname");
      if (opt_idx >= 0)
          options[opt_idx].def_val[VI_DEFAULT] = (char_u *)TRUE;
    }
#endif

#ifdef FEAT_SEARCHPATH
    {
      char_u      *cdpath;
      char_u      *buf;
      int   i;
      int   j;
      int   mustfree = FALSE;

      /* Initialize the 'cdpath' option's default value. */
      cdpath = vim_getenv((char_u *)"CDPATH", &mustfree);
      if (cdpath != NULL)
      {
          buf = alloc((unsigned)((STRLEN(cdpath) << 1) + 2));
          if (buf != NULL)
          {
            buf[0] = ',';         /* start with ",", current dir first */
            j = 1;
            for (i = 0; cdpath[i] != NUL; ++i)
            {
                if (vim_ispathlistsep(cdpath[i]))
                  buf[j++] = ',';
                else
                {
                  if (cdpath[i] == ' ' || cdpath[i] == ',')
                      buf[j++] = '\\';
                  buf[j++] = cdpath[i];
                }
            }
            buf[j] = NUL;
            opt_idx = findoption((char_u *)"cdpath");
            if (opt_idx >= 0)
            {
                options[opt_idx].def_val[VI_DEFAULT] = buf;
                options[opt_idx].flags |= P_DEF_ALLOCED;
            }
          }
          if (mustfree)
            vim_free(cdpath);
      }
    }
#endif

#if defined(FEAT_POSTSCRIPT) && (defined(MSWIN) || defined(OS2) || defined(VMS) || defined(EBCDIC) || defined(MAC) || defined(hpux))
    /* Set print encoding on platforms that don't default to latin1 */
    set_string_default("penc",
# if defined(MSWIN) || defined(OS2)
                   (char_u *)"cp1252"
# else
#  ifdef VMS
                   (char_u *)"dec-mcs"
#  else
#   ifdef EBCDIC
                   (char_u *)"ebcdic-uk"
#   else
#    ifdef MAC
                   (char_u *)"mac-roman"
#    else /* HPUX */
                   (char_u *)"hp-roman8"
#    endif
#   endif
#  endif
# endif
                   );
#endif

#ifdef FEAT_POSTSCRIPT
    /* 'printexpr' must be allocated to be able to evaluate it. */
    set_string_default("pexpr",
# if defined(MSWIN) || defined(MSDOS) || defined(OS2)
          (char_u *)"system('copy' . ' ' . v:fname_in . (&printdevice == '' ? ' LPT1:' : (' \"' . &printdevice . '\"'))) . delete(v:fname_in)"
# else
#  ifdef VMS
          (char_u *)"system('print/delete' . (&printdevice == '' ? '' : ' /queue=' . &printdevice) . ' ' . v:fname_in)"

#  else
          (char_u *)"system('lpr' . (&printdevice == '' ? '' : ' -P' . &printdevice) . ' ' . v:fname_in) . delete(v:fname_in) + v:shell_error"
#  endif
# endif
          );
#endif

    /*
     * Set all the options (except the terminal options) to their default
     * value.  Also set the global value for local options.
     */
    set_options_default(0);

#ifdef FEAT_GUI
    if (found_reverse_arg)
      set_option_value((char_u *)"bg", 0L, (char_u *)"dark", 0);
#endif

    curbuf->b_p_initialized = TRUE;
    curbuf->b_p_ar = -1;      /* no local 'autoread' value */
    check_buf_options(curbuf);
    check_win_options(curwin);
    check_options();

    /* Must be before option_expand(), because that one needs vim_isIDc() */
    didset_options();

#ifdef FEAT_SPELL
    /* Use the current chartab for the generic chartab. */
    init_spell_chartab();
#endif

#ifdef FEAT_LINEBREAK
    /*
     * initialize the table for 'breakat'.
     */
    fill_breakat_flags();
#endif

    /*
     * Expand environment variables and things like "~" for the defaults.
     * If option_expand() returns non-NULL the variable is expanded.  This can
     * only happen for non-indirect options.
     * Also set the default to the expanded value, so ":set" does not list
     * them.
     * Don't set the P_ALLOCED flag, because we don't want to free the
     * default.
     */
    for (opt_idx = 0; !istermoption(&options[opt_idx]); opt_idx++)
    {
      if ((options[opt_idx].flags & P_GETTEXT)
                                    && options[opt_idx].var != NULL)
          p = (char_u *)_(*(char **)options[opt_idx].var);
      else
          p = option_expand(opt_idx, NULL);
      if (p != NULL && (p = vim_strsave(p)) != NULL)
      {
          *(char_u **)options[opt_idx].var = p;
          /* VIMEXP
           * Defaults for all expanded options are currently the same for Vi
           * and Vim.  When this changes, add some code here!  Also need to
           * split P_DEF_ALLOCED in two.
           */
          if (options[opt_idx].flags & P_DEF_ALLOCED)
            vim_free(options[opt_idx].def_val[VI_DEFAULT]);
          options[opt_idx].def_val[VI_DEFAULT] = p;
          options[opt_idx].flags |= P_DEF_ALLOCED;
      }
    }

    /* Initialize the highlight_attr[] table. */
    highlight_changed();

    save_file_ff(curbuf);     /* Buffer is unchanged */

    /* Parse default for 'wildmode'  */
    check_opt_wim();

#if defined(FEAT_ARABIC)
    /* Detect use of mlterm.
     * Mlterm is a terminal emulator akin to xterm that has some special
     * abilities (bidi namely).
     * NOTE: mlterm's author is being asked to 'set' a variable
     *       instead of an environment variable due to inheritance.
     */
    if (mch_getenv((char_u *)"MLTERM") != NULL)
      set_option_value((char_u *)"tbidi", 1L, NULL, 0);
#endif

#if defined(FEAT_WINDOWS) || defined(FEAT_FOLDING)
    /* Parse default for 'fillchars'. */
    (void)set_chars_option(&p_fcs);
#endif

#ifdef FEAT_CLIPBOARD
    /* Parse default for 'clipboard' */
    (void)check_clipboard_option();
#endif

#ifdef FEAT_MBYTE
# if defined(WIN3264) && defined(FEAT_GETTEXT)
    /*
     * If $LANG isn't set, try to get a good value for it.  This makes the
     * right language be used automatically.  Don't do this for English.
     */
    if (mch_getenv((char_u *)"LANG") == NULL)
    {
      char  buf[20];

      /* Could use LOCALE_SISO639LANGNAME, but it's not in Win95.
       * LOCALE_SABBREVLANGNAME gives us three letters, like "enu", we use
       * only the first two. */
      n = GetLocaleInfo(LOCALE_USER_DEFAULT, LOCALE_SABBREVLANGNAME,
                                               (LPTSTR)buf, 20);
      if (n >= 2 && STRNICMP(buf, "en", 2) != 0)
      {
          /* There are a few exceptions (probably more) */
          if (STRNICMP(buf, "cht", 3) == 0 || STRNICMP(buf, "zht", 3) == 0)
            STRCPY(buf, "zh_TW");
          else if (STRNICMP(buf, "chs", 3) == 0
                                    || STRNICMP(buf, "zhc", 3) == 0)
            STRCPY(buf, "zh_CN");
          else if (STRNICMP(buf, "jp", 2) == 0)
            STRCPY(buf, "ja");
          else
            buf[2] = NUL;           /* truncate to two-letter code */
          vim_setenv("LANG", buf);
      }
    }
# else
#  ifdef MACOS_CONVERT
    /* Moved to os_mac_conv.c to avoid dependency problems. */
    mac_lang_init();
#  endif
# endif

    /* enc_locale() will try to find the encoding of the current locale. */
    p = enc_locale();
    if (p != NULL)
    {
      char_u *save_enc;

      /* Try setting 'encoding' and check if the value is valid.
       * If not, go back to the default "latin1". */
      save_enc = p_enc;
      p_enc = p;
      if (STRCMP(p_enc, "gb18030") == 0)
      {
          /* We don't support "gb18030", but "cp936" is a good substitute
           * for practical purposes, thus use that.  It's not an alias to
           * still support conversion between gb18030 and utf-8. */
          p_enc = vim_strsave((char_u *)"cp936");
          vim_free(p);
      }
      if (mb_init() == NULL)
      {
          opt_idx = findoption((char_u *)"encoding");
          if (opt_idx >= 0)
          {
            options[opt_idx].def_val[VI_DEFAULT] = p_enc;
            options[opt_idx].flags |= P_DEF_ALLOCED;
          }

#if defined(MSDOS) || defined(MSWIN) || defined(OS2) || defined(MACOS) \
            || defined(VMS)
          if (STRCMP(p_enc, "latin1") == 0
# ifdef FEAT_MBYTE
                || enc_utf8
# endif
                )
          {
            /* Adjust the default for 'isprint' and 'iskeyword' to match
             * latin1.  Also set the defaults for when 'nocompatible' is
             * set. */
            set_string_option_direct((char_u *)"isp", -1,
                                    ISP_LATIN1, OPT_FREE, SID_NONE);
            set_string_option_direct((char_u *)"isk", -1,
                                    ISK_LATIN1, OPT_FREE, SID_NONE);
            opt_idx = findoption((char_u *)"isp");
            if (opt_idx >= 0)
                options[opt_idx].def_val[VIM_DEFAULT] = ISP_LATIN1;
            opt_idx = findoption((char_u *)"isk");
            if (opt_idx >= 0)
                options[opt_idx].def_val[VIM_DEFAULT] = ISK_LATIN1;
            (void)init_chartab();
          }
#endif

# if defined(WIN3264) && !defined(FEAT_GUI)
          /* Win32 console: When GetACP() returns a different value from
           * GetConsoleCP() set 'termencoding'. */
          if (GetACP() != GetConsoleCP())
          {
            char  buf[50];

            sprintf(buf, "cp%ld", (long)GetConsoleCP());
            p_tenc = vim_strsave((char_u *)buf);
            if (p_tenc != NULL)
            {
                opt_idx = findoption((char_u *)"termencoding");
                if (opt_idx >= 0)
                {
                  options[opt_idx].def_val[VI_DEFAULT] = p_tenc;
                  options[opt_idx].flags |= P_DEF_ALLOCED;
                }
                convert_setup(&input_conv, p_tenc, p_enc);
                convert_setup(&output_conv, p_enc, p_tenc);
            }
            else
                p_tenc = empty_option;
          }
# endif
# if defined(WIN3264) && defined(FEAT_MBYTE)
          /* $HOME may have characters in active code page. */
          init_homedir();
# endif
      }
      else
      {
          vim_free(p_enc);
          p_enc = save_enc;
      }
    }
#endif

#ifdef FEAT_MULTI_LANG
    /* Set the default for 'helplang'. */
    set_helplang_default(get_mess_lang());
#endif
}

/*
 * Set an option to its default value.
 * This does not take care of side effects!
 */
    static void
set_option_default(opt_idx, opt_flags, compatible)
    int           opt_idx;
    int           opt_flags;  /* OPT_FREE, OPT_LOCAL and/or OPT_GLOBAL */
    int           compatible; /* use Vi default value */
{
    char_u  *varp;            /* pointer to variable for current option */
    int           dvi;        /* index in def_val[] */
    long_u  flags;
    long_u  *flagsp;
    int           both = (opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0;

    varp = get_varp_scope(&(options[opt_idx]), both ? OPT_LOCAL : opt_flags);
    flags = options[opt_idx].flags;
    if (varp != NULL)       /* skip hidden option, nothing to do for it */
    {
      dvi = ((flags & P_VI_DEF) || compatible) ? VI_DEFAULT : VIM_DEFAULT;
      if (flags & P_STRING)
      {
          /* Use set_string_option_direct() for local options to handle
           * freeing and allocating the value. */
          if (options[opt_idx].indir != PV_NONE)
            set_string_option_direct(NULL, opt_idx,
                         options[opt_idx].def_val[dvi], opt_flags, 0);
          else
          {
            if ((opt_flags & OPT_FREE) && (flags & P_ALLOCED))
                free_string_option(*(char_u **)(varp));
            *(char_u **)varp = options[opt_idx].def_val[dvi];
            options[opt_idx].flags &= ~P_ALLOCED;
          }
      }
      else if (flags & P_NUM)
      {
          if (options[opt_idx].indir == PV_SCROLL)
            win_comp_scroll(curwin);
          else
          {
            *(long *)varp = (long)(long_i)options[opt_idx].def_val[dvi];
            /* May also set global value for local option. */
            if (both)
                *(long *)get_varp_scope(&(options[opt_idx]), OPT_GLOBAL) =
                                                *(long *)varp;
          }
      }
      else  /* P_BOOL */
      {
          /* the cast to long is required for Manx C, long_i is needed for
           * MSVC */
          *(int *)varp = (int)(long)(long_i)options[opt_idx].def_val[dvi];
#ifdef UNIX
          /* 'modeline' defaults to off for root */
          if (options[opt_idx].indir == PV_ML && getuid() == ROOT_UID)
            *(int *)varp = FALSE;
#endif
          /* May also set global value for local option. */
          if (both)
            *(int *)get_varp_scope(&(options[opt_idx]), OPT_GLOBAL) =
                                                *(int *)varp;
      }

      /* The default value is not insecure. */
      flagsp = insecure_flag(opt_idx, opt_flags);
      *flagsp = *flagsp & ~P_INSECURE;
    }

#ifdef FEAT_EVAL
    set_option_scriptID_idx(opt_idx, opt_flags, current_SID);
#endif
}

/*
 * Set all options (except terminal options) to their default value.
 */
    static void
set_options_default(opt_flags)
    int           opt_flags;  /* OPT_FREE, OPT_LOCAL and/or OPT_GLOBAL */
{
    int           i;
#ifdef FEAT_WINDOWS
    win_T   *wp;
    tabpage_T     *tp;
#endif

    for (i = 0; !istermoption(&options[i]); i++)
      if (!(options[i].flags & P_NODEFAULT))
          set_option_default(i, opt_flags, p_cp);

#ifdef FEAT_WINDOWS
    /* The 'scroll' option must be computed for all windows. */
    FOR_ALL_TAB_WINDOWS(tp, wp)
      win_comp_scroll(wp);
#else
      win_comp_scroll(curwin);
#endif
}

/*
 * Set the Vi-default value of a string option.
 * Used for 'sh', 'backupskip' and 'term'.
 */
    void
set_string_default(name, val)
    char    *name;
    char_u  *val;
{
    char_u  *p;
    int           opt_idx;

    p = vim_strsave(val);
    if (p != NULL)            /* we don't want a NULL */
    {
      opt_idx = findoption((char_u *)name);
      if (opt_idx >= 0)
      {
          if (options[opt_idx].flags & P_DEF_ALLOCED)
            vim_free(options[opt_idx].def_val[VI_DEFAULT]);
          options[opt_idx].def_val[VI_DEFAULT] = p;
          options[opt_idx].flags |= P_DEF_ALLOCED;
      }
    }
}

/*
 * Set the Vi-default value of a number option.
 * Used for 'lines' and 'columns'.
 */
    void
set_number_default(name, val)
    char    *name;
    long    val;
{
    int           opt_idx;

    opt_idx = findoption((char_u *)name);
    if (opt_idx >= 0)
      options[opt_idx].def_val[VI_DEFAULT] = (char_u *)(long_i)val;
}

#if defined(EXITFREE) || defined(PROTO)
/*
 * Free all options.
 */
    void
free_all_options()
{
    int           i;

    for (i = 0; !istermoption(&options[i]); i++)
    {
      if (options[i].indir == PV_NONE)
      {
          /* global option: free value and default value. */
          if (options[i].flags & P_ALLOCED && options[i].var != NULL)
            free_string_option(*(char_u **)options[i].var);
          if (options[i].flags & P_DEF_ALLOCED)
            free_string_option(options[i].def_val[VI_DEFAULT]);
      }
      else if (options[i].var != VAR_WIN
            && (options[i].flags & P_STRING))
          /* buffer-local option: free global value */
          free_string_option(*(char_u **)options[i].var);
    }
}
#endif


/*
 * Initialize the options, part two: After getting Rows and Columns and
 * setting 'term'.
 */
    void
set_init_2()
{
    int           idx;

    /*
     * 'scroll' defaults to half the window height. Note that this default is
     * wrong when the window height changes.
     */
    set_number_default("scroll", (long)((long_u)Rows >> 1));
    idx = findoption((char_u *)"scroll");
    if (idx >= 0 && !(options[idx].flags & P_WAS_SET))
      set_option_default(idx, OPT_LOCAL, p_cp);
    comp_col();

    /*
     * 'window' is only for backwards compatibility with Vi.
     * Default is Rows - 1.
     */
    if (!option_was_set((char_u *)"window"))
      p_window = Rows - 1;
    set_number_default("window", Rows - 1);

    /* For DOS console the default is always black. */
#if !((defined(MSDOS) || defined(OS2) || defined(WIN3264)) && !defined(FEAT_GUI))
    /*
     * If 'background' wasn't set by the user, try guessing the value,
     * depending on the terminal name.  Only need to check for terminals
     * with a dark background, that can handle color.
     */
    idx = findoption((char_u *)"bg");
    if (idx >= 0 && !(options[idx].flags & P_WAS_SET)
                                     && *term_bg_default() == 'd')
    {
      set_string_option_direct(NULL, idx, (char_u *)"dark", OPT_FREE, 0);
      /* don't mark it as set, when starting the GUI it may be
       * changed again */
      options[idx].flags &= ~P_WAS_SET;
    }
#endif

#ifdef CURSOR_SHAPE
    parse_shape_opt(SHAPE_CURSOR); /* set cursor shapes from 'guicursor' */
#endif
#ifdef FEAT_MOUSESHAPE
    parse_shape_opt(SHAPE_MOUSE);  /* set mouse shapes from 'mouseshape' */
#endif
#ifdef FEAT_PRINTER
    (void)parse_printoptions();         /* parse 'printoptions' default value */
#endif
}

/*
 * Return "dark" or "light" depending on the kind of terminal.
 * This is just guessing!  Recognized are:
 * "linux"      Linux console
 * "screen.linux"   Linux console with screen
 * "cygwin"     Cygwin shell
 * "putty"      Putty program
 * We also check the COLORFGBG environment variable, which is set by
 * rxvt and derivatives. This variable contains either two or three
 * values separated by semicolons; we want the last value in either
 * case. If this value is 0-6 or 8, our background is dark.
 */
    static char_u *
term_bg_default()
{
#if defined(MSDOS) || defined(OS2) || defined(WIN3264)
    /* DOS console nearly always black */
    return (char_u *)"dark";
#else
    char_u  *p;

    if (STRCMP(T_NAME, "linux") == 0
          || STRCMP(T_NAME, "screen.linux") == 0
          || STRCMP(T_NAME, "cygwin") == 0
          || STRCMP(T_NAME, "putty") == 0
          || ((p = mch_getenv((char_u *)"COLORFGBG")) != NULL
            && (p = vim_strrchr(p, ';')) != NULL
            && ((p[1] >= '0' && p[1] <= '6') || p[1] == '8')
            && p[2] == NUL))
      return (char_u *)"dark";
    return (char_u *)"light";
#endif
}

/*
 * Initialize the options, part three: After reading the .vimrc
 */
    void
set_init_3()
{
#if defined(UNIX) || defined(OS2) || defined(WIN3264)
/*
 * Set 'shellpipe' and 'shellredir', depending on the 'shell' option.
 * This is done after other initializations, where 'shell' might have been
 * set, but only if they have not been set before.
 */
    char_u  *p;
    int         idx_srr;
    int         do_srr;
#ifdef FEAT_QUICKFIX
    int         idx_sp;
    int         do_sp;
#endif

    idx_srr = findoption((char_u *)"srr");
    if (idx_srr < 0)
      do_srr = FALSE;
    else
      do_srr = !(options[idx_srr].flags & P_WAS_SET);
#ifdef FEAT_QUICKFIX
    idx_sp = findoption((char_u *)"sp");
    if (idx_sp < 0)
      do_sp = FALSE;
    else
      do_sp = !(options[idx_sp].flags & P_WAS_SET);
#endif

    /*
     * Isolate the name of the shell:
     * - Skip beyond any path.  E.g., "/usr/bin/csh -f" -> "csh -f".
     * - Remove any argument.  E.g., "csh -f" -> "csh".
     */
    p = gettail(p_sh);
    p = vim_strnsave(p, (int)(skiptowhite(p) - p));
    if (p != NULL)
    {
      /*
       * Default for p_sp is "| tee", for p_srr is ">".
       * For known shells it is changed here to include stderr.
       */
      if (     fnamecmp(p, "csh") == 0
            || fnamecmp(p, "tcsh") == 0
# if defined(OS2) || defined(WIN3264)     /* also check with .exe extension */
            || fnamecmp(p, "csh.exe") == 0
            || fnamecmp(p, "tcsh.exe") == 0
# endif
         )
      {
#if defined(FEAT_QUICKFIX)
          if (do_sp)
          {
# ifdef WIN3264
            p_sp = (char_u *)">&";
# else
            p_sp = (char_u *)"|& tee";
# endif
            options[idx_sp].def_val[VI_DEFAULT] = p_sp;
          }
#endif
          if (do_srr)
          {
            p_srr = (char_u *)">&";
            options[idx_srr].def_val[VI_DEFAULT] = p_srr;
          }
      }
      else
# ifndef OS2      /* Always use bourne shell style redirection if we reach this */
          if (       fnamecmp(p, "sh") == 0
                || fnamecmp(p, "ksh") == 0
                || fnamecmp(p, "zsh") == 0
                || fnamecmp(p, "zsh-beta") == 0
                || fnamecmp(p, "bash") == 0
#  ifdef WIN3264
                || fnamecmp(p, "cmd") == 0
                || fnamecmp(p, "sh.exe") == 0
                || fnamecmp(p, "ksh.exe") == 0
                || fnamecmp(p, "zsh.exe") == 0
                || fnamecmp(p, "zsh-beta.exe") == 0
                || fnamecmp(p, "bash.exe") == 0
                || fnamecmp(p, "cmd.exe") == 0
#  endif
                )
# endif
          {
#if defined(FEAT_QUICKFIX)
            if (do_sp)
            {
# ifdef WIN3264
                p_sp = (char_u *)">%s 2>&1";
# else
                p_sp = (char_u *)"2>&1| tee";
# endif
                options[idx_sp].def_val[VI_DEFAULT] = p_sp;
            }
#endif
            if (do_srr)
            {
                p_srr = (char_u *)">%s 2>&1";
                options[idx_srr].def_val[VI_DEFAULT] = p_srr;
            }
          }
      vim_free(p);
    }
#endif

#if defined(MSDOS) || defined(WIN3264) || defined(OS2)
    /*
     * Set 'shellcmdflag and 'shellquote' depending on the 'shell' option.
     * This is done after other initializations, where 'shell' might have been
     * set, but only if they have not been set before.  Default for p_shcf is
     * "/c", for p_shq is "".  For "sh" like  shells it is changed here to
     * "-c" and "\"", but not for DJGPP, because it starts the shell without
     * command.com.  And for Win32 we need to set p_sxq instead.
     */
    if (strstr((char *)gettail(p_sh), "sh") != NULL)
    {
      int   idx3;

      idx3 = findoption((char_u *)"shcf");
      if (idx3 >= 0 && !(options[idx3].flags & P_WAS_SET))
      {
          p_shcf = (char_u *)"-c";
          options[idx3].def_val[VI_DEFAULT] = p_shcf;
      }

# ifndef DJGPP
#  ifdef WIN3264
      /* Somehow Win32 requires the quotes around the redirection too */
      idx3 = findoption((char_u *)"sxq");
      if (idx3 >= 0 && !(options[idx3].flags & P_WAS_SET))
      {
          p_sxq = (char_u *)"\"";
          options[idx3].def_val[VI_DEFAULT] = p_sxq;
      }
#  else
      idx3 = findoption((char_u *)"shq");
      if (idx3 >= 0 && !(options[idx3].flags & P_WAS_SET))
      {
          p_shq = (char_u *)"\"";
          options[idx3].def_val[VI_DEFAULT] = p_shq;
      }
#  endif
# endif
    }
#endif

#ifdef FEAT_TITLE
    set_title_defaults();
#endif
}

#if defined(FEAT_MULTI_LANG) || defined(PROTO)
/*
 * When 'helplang' is still at its default value, set it to "lang".
 * Only the first two characters of "lang" are used.
 */
    void
set_helplang_default(lang)
    char_u  *lang;
{
    int           idx;

    if (lang == NULL || STRLEN(lang) < 2) /* safety check */
      return;
    idx = findoption((char_u *)"hlg");
    if (idx >= 0 && !(options[idx].flags & P_WAS_SET))
    {
      if (options[idx].flags & P_ALLOCED)
          free_string_option(p_hlg);
      p_hlg = vim_strsave(lang);
      if (p_hlg == NULL)
          p_hlg = empty_option;
      else
      {
          /* zh_CN becomes "cn", zh_TW becomes "tw". */
          if (STRNICMP(p_hlg, "zh_", 3) == 0 && STRLEN(p_hlg) >= 5)
          {
            p_hlg[0] = TOLOWER_ASC(p_hlg[3]);
            p_hlg[1] = TOLOWER_ASC(p_hlg[4]);
          }
          p_hlg[2] = NUL;
      }
      options[idx].flags |= P_ALLOCED;
    }
}
#endif

#ifdef FEAT_GUI
static char_u *gui_bg_default __ARGS((void));

    static char_u *
gui_bg_default()
{
    if (gui_get_lightness(gui.back_pixel) < 127)
      return (char_u *)"dark";
    return (char_u *)"light";
}

/*
 * Option initializations that can only be done after opening the GUI window.
 */
    void
init_gui_options()
{
    /* Set the 'background' option according to the lightness of the
     * background color, unless the user has set it already. */
    if (!option_was_set((char_u *)"bg") && STRCMP(p_bg, gui_bg_default()) != 0)
    {
      set_option_value((char_u *)"bg", 0L, gui_bg_default(), 0);
      highlight_changed();
    }
}
#endif

#ifdef FEAT_TITLE
/*
 * 'title' and 'icon' only default to true if they have not been set or reset
 * in .vimrc and we can read the old value.
 * When 'title' and 'icon' have been reset in .vimrc, we won't even check if
 * they can be reset.  This reduces startup time when using X on a remote
 * machine.
 */
    void
set_title_defaults()
{
    int         idx1;
    long    val;

    /*
     * If GUI is (going to be) used, we can always set the window title and
     * icon name.  Saves a bit of time, because the X11 display server does
     * not need to be contacted.
     */
    idx1 = findoption((char_u *)"title");
    if (idx1 >= 0 && !(options[idx1].flags & P_WAS_SET))
    {
#ifdef FEAT_GUI
      if (gui.starting || gui.in_use)
          val = TRUE;
      else
#endif
          val = mch_can_restore_title();
      options[idx1].def_val[VI_DEFAULT] = (char_u *)(long_i)val;
      p_title = val;
    }
    idx1 = findoption((char_u *)"icon");
    if (idx1 >= 0 && !(options[idx1].flags & P_WAS_SET))
    {
#ifdef FEAT_GUI
      if (gui.starting || gui.in_use)
          val = TRUE;
      else
#endif
          val = mch_can_restore_icon();
      options[idx1].def_val[VI_DEFAULT] = (char_u *)(long_i)val;
      p_icon = val;
    }
}
#endif

/*
 * Parse 'arg' for option settings.
 *
 * 'arg' may be IObuff, but only when no errors can be present and option
 * does not need to be expanded with option_expand().
 * "opt_flags":
 * 0 for ":set"
 * OPT_GLOBAL   for ":setglobal"
 * OPT_LOCAL    for ":setlocal" and a modeline
 * OPT_MODELINE for a modeline
 * OPT_WINONLY  to only set window-local options
 * OPT_NOWIN      to skip setting window-local options
 *
 * returns FAIL if an error is detected, OK otherwise
 */
    int
do_set(arg, opt_flags)
    char_u  *arg;       /* option string (may be written to!) */
    int           opt_flags;
{
    int           opt_idx;
    char_u  *errmsg;
    char_u  errbuf[80];
    char_u  *startarg;
    int           prefix;     /* 1: nothing, 0: "no", 2: "inv" in front of name */
    int           nextchar;       /* next non-white char after option name */
    int           afterchar;      /* character just after option name */
    int           len;
    int           i;
    long    value;
    int           key;
    long_u  flags;                /* flags for current option */
    char_u  *varp = NULL;         /* pointer to variable for current option */
    int           did_show = FALSE;   /* already showed one value */
    int           adding;               /* "opt+=arg" */
    int           prepending;     /* "opt^=arg" */
    int           removing;       /* "opt-=arg" */
    int           cp_val = 0;
    char_u  key_name[2];

    if (*arg == NUL)
    {
      showoptions(0, opt_flags);
      did_show = TRUE;
      goto theend;
    }

    while (*arg != NUL)       /* loop to process all options */
    {
      errmsg = NULL;
      startarg = arg;         /* remember for error message */

      if (STRNCMP(arg, "all", 3) == 0 && !isalpha(arg[3])
                                    && !(opt_flags & OPT_MODELINE))
      {
          /*
           * ":set all"  show all options.
           * ":set all&" set all options to their default value.
           */
          arg += 3;
          if (*arg == '&')
          {
            ++arg;
            /* Only for :set command set global value of local options. */
            set_options_default(OPT_FREE | opt_flags);
          }
          else
          {
            showoptions(1, opt_flags);
            did_show = TRUE;
          }
      }
      else if (STRNCMP(arg, "termcap", 7) == 0 && !(opt_flags & OPT_MODELINE))
      {
          showoptions(2, opt_flags);
          show_termcodes();
          did_show = TRUE;
          arg += 7;
      }
      else
      {
          prefix = 1;
          if (STRNCMP(arg, "no", 2) == 0 && STRNCMP(arg, "novice", 6) != 0)
          {
            prefix = 0;
            arg += 2;
          }
          else if (STRNCMP(arg, "inv", 3) == 0)
          {
            prefix = 2;
            arg += 3;
          }

          /* find end of name */
          key = 0;
          if (*arg == '<')
          {
            nextchar = 0;
            opt_idx = -1;
            /* look out for <t_>;> */
            if (arg[1] == 't' && arg[2] == '_' && arg[3] && arg[4])
                len = 5;
            else
            {
                len = 1;
                while (arg[len] != NUL && arg[len] != '>')
                  ++len;
            }
            if (arg[len] != '>')
            {
                errmsg = e_invarg;
                goto skip;
            }
            arg[len] = NUL;                   /* put NUL after name */
            if (arg[1] == 't' && arg[2] == '_') /* could be term code */
                opt_idx = findoption(arg + 1);
            arg[len++] = '>';           /* restore '>' */
            if (opt_idx == -1)
                key = find_key_option(arg + 1);
          }
          else
          {
            len = 0;
            /*
             * The two characters after "t_" may not be alphanumeric.
             */
            if (arg[0] == 't' && arg[1] == '_' && arg[2] && arg[3])
                len = 4;
            else
                while (ASCII_ISALNUM(arg[len]) || arg[len] == '_')
                  ++len;
            nextchar = arg[len];
            arg[len] = NUL;                   /* put NUL after name */
            opt_idx = findoption(arg);
            arg[len] = nextchar;              /* restore nextchar */
            if (opt_idx == -1)
                key = find_key_option(arg);
          }

          /* remember character after option name */
          afterchar = arg[len];

          /* skip white space, allow ":set ai  ?" */
          while (vim_iswhite(arg[len]))
            ++len;

          adding = FALSE;
          prepending = FALSE;
          removing = FALSE;
          if (arg[len] != NUL && arg[len + 1] == '=')
          {
            if (arg[len] == '+')
            {
                adding = TRUE;            /* "+=" */
                ++len;
            }
            else if (arg[len] == '^')
            {
                prepending = TRUE;        /* "^=" */
                ++len;
            }
            else if (arg[len] == '-')
            {
                removing = TRUE;          /* "-=" */
                ++len;
            }
          }
          nextchar = arg[len];

          if (opt_idx == -1 && key == 0)  /* found a mismatch: skip */
          {
            errmsg = (char_u *)N_("E518: Unknown option");
            goto skip;
          }

          if (opt_idx >= 0)
          {
            if (options[opt_idx].var == NULL)   /* hidden option: skip */
            {
                /* Only give an error message when requesting the value of
                 * a hidden option, ignore setting it. */
                if (vim_strchr((char_u *)"=:!&<", nextchar) == NULL
                      && (!(options[opt_idx].flags & P_BOOL)
                        || nextchar == '?'))
                  errmsg = (char_u *)N_("E519: Option not supported");
                goto skip;
            }

            flags = options[opt_idx].flags;
            varp = get_varp_scope(&(options[opt_idx]), opt_flags);
          }
          else
          {
            flags = P_STRING;
            if (key < 0)
            {
                key_name[0] = KEY2TERMCAP0(key);
                key_name[1] = KEY2TERMCAP1(key);
            }
            else
            {
                key_name[0] = KS_KEY;
                key_name[1] = (key & 0xff);
            }
          }

          /* Skip all options that are not window-local (used when showing
           * an already loaded buffer in a window). */
          if ((opt_flags & OPT_WINONLY)
                    && (opt_idx < 0 || options[opt_idx].var != VAR_WIN))
            goto skip;

          /* Skip all options that are window-local (used for :vimgrep). */
          if ((opt_flags & OPT_NOWIN) && opt_idx >= 0
                                 && options[opt_idx].var == VAR_WIN)
            goto skip;

          /* Disallow changing some options from modelines. */
          if (opt_flags & OPT_MODELINE)
          {
            if (flags & P_SECURE)
            {
                errmsg = (char_u *)_("E520: Not allowed in a modeline");
                goto skip;
            }
#ifdef FEAT_DIFF
            /* In diff mode some options are overruled.  This avoids that
             * 'foldmethod' becomes "marker" instead of "diff" and that
             * "wrap" gets set. */
            if (curwin->w_p_diff
                  && (options[opt_idx].indir == PV_FDM
                      || options[opt_idx].indir == PV_WRAP))
                goto skip;
#endif
          }

#ifdef HAVE_SANDBOX
          /* Disallow changing some options in the sandbox */
          if (sandbox != 0 && (flags & P_SECURE))
          {
            errmsg = (char_u *)_(e_sandbox);
            goto skip;
          }
#endif

          if (vim_strchr((char_u *)"?=:!&<", nextchar) != NULL)
          {
            arg += len;
            cp_val = p_cp;
            if (nextchar == '&' && arg[1] == 'v' && arg[2] == 'i')
            {
                if (arg[3] == 'm')  /* "opt&vim": set to Vim default */
                {
                  cp_val = FALSE;
                  arg += 3;
                }
                else          /* "opt&vi": set to Vi default */
                {
                  cp_val = TRUE;
                  arg += 2;
                }
            }
            if (vim_strchr((char_u *)"?!&<", nextchar) != NULL
                  && arg[1] != NUL && !vim_iswhite(arg[1]))
            {
                errmsg = e_trailing;
                goto skip;
            }
          }

          /*
           * allow '=' and ':' as MSDOS command.com allows only one
           * '=' character per "set" command line. grrr. (jw)
           */
          if (nextchar == '?'
                || (prefix == 1
                  && vim_strchr((char_u *)"=:&<", nextchar) == NULL
                  && !(flags & P_BOOL)))
          {
            /*
             * print value
             */
            if (did_show)
                msg_putchar('\n');      /* cursor below last one */
            else
            {
                gotocmdline(TRUE);      /* cursor at status line */
                did_show = TRUE;        /* remember that we did a line */
            }
            if (opt_idx >= 0)
            {
                showoneopt(&options[opt_idx], opt_flags);
#ifdef FEAT_EVAL
                if (p_verbose > 0)
                {
                  /* Mention where the option was last set. */
                  if (varp == options[opt_idx].var)
                      last_set_msg(options[opt_idx].scriptID);
                  else if ((int)options[opt_idx].indir & PV_WIN)
                      last_set_msg(curwin->w_p_scriptID[
                              (int)options[opt_idx].indir & PV_MASK]);
                  else if ((int)options[opt_idx].indir & PV_BUF)
                      last_set_msg(curbuf->b_p_scriptID[
                              (int)options[opt_idx].indir & PV_MASK]);
                }
#endif
            }
            else
            {
                char_u      *p;

                p = find_termcode(key_name);
                if (p == NULL)
                {
                  errmsg = (char_u *)N_("E518: Unknown option");
                  goto skip;
                }
                else
                  (void)show_one_termcode(key_name, p, TRUE);
            }
            if (nextchar != '?'
                  && nextchar != NUL && !vim_iswhite(afterchar))
                errmsg = e_trailing;
          }
          else
          {
            if (flags & P_BOOL)               /* boolean */
            {
                if (nextchar == '=' || nextchar == ':')
                {
                  errmsg = e_invarg;
                  goto skip;
                }

                /*
                 * ":set opt!": invert
                 * ":set opt&": reset to default value
                 * ":set opt<": reset to global value
                 */
                if (nextchar == '!')
                  value = *(int *)(varp) ^ 1;
                else if (nextchar == '&')
                  value = (int)(long)(long_i)options[opt_idx].def_val[
                                    ((flags & P_VI_DEF) || cp_val)
                                     ?  VI_DEFAULT : VIM_DEFAULT];
                else if (nextchar == '<')
                {
                  /* For 'autoread' -1 means to use global value. */
                  if ((int *)varp == &curbuf->b_p_ar
                                        && opt_flags == OPT_LOCAL)
                      value = -1;
                  else
                      value = *(int *)get_varp_scope(&(options[opt_idx]),
                                                  OPT_GLOBAL);
                }
                else
                {
                  /*
                   * ":set invopt": invert
                   * ":set opt" or ":set noopt": set or reset
                   */
                  if (nextchar != NUL && !vim_iswhite(afterchar))
                  {
                      errmsg = e_trailing;
                      goto skip;
                  }
                  if (prefix == 2)  /* inv */
                      value = *(int *)(varp) ^ 1;
                  else
                      value = prefix;
                }

                errmsg = set_bool_option(opt_idx, varp, (int)value,
                                                   opt_flags);
            }
            else                        /* numeric or string */
            {
                if (vim_strchr((char_u *)"=:&<", nextchar) == NULL
                                                 || prefix != 1)
                {
                  errmsg = e_invarg;
                  goto skip;
                }

                if (flags & P_NUM)            /* numeric */
                {
                  /*
                   * Different ways to set a number option:
                   * &      set to default value
                   * <      set to global value
                   * <xx>         accept special key codes for 'wildchar'
                   * c      accept any non-digit for 'wildchar'
                   * [-]0-9   set number
                   * other    error
                   */
                  ++arg;
                  if (nextchar == '&')
                      value = (long)(long_i)options[opt_idx].def_val[
                                    ((flags & P_VI_DEF) || cp_val)
                                     ?  VI_DEFAULT : VIM_DEFAULT];
                  else if (nextchar == '<')
                      value = *(long *)get_varp_scope(&(options[opt_idx]),
                                                  OPT_GLOBAL);
                  else if (((long *)varp == &p_wc
                            || (long *)varp == &p_wcm)
                        && (*arg == '<'
                            || *arg == '^'
                            || ((!arg[1] || vim_iswhite(arg[1]))
                              && !VIM_ISDIGIT(*arg))))
                  {
                      value = string_to_key(arg);
                      if (value == 0 && (long *)varp != &p_wcm)
                      {
                        errmsg = e_invarg;
                        goto skip;
                      }
                  }
                        /* allow negative numbers (for 'undolevels') */
                  else if (*arg == '-' || VIM_ISDIGIT(*arg))
                  {
                      i = 0;
                      if (*arg == '-')
                        i = 1;
#ifdef HAVE_STRTOL
                      value = strtol((char *)arg, NULL, 0);
                      if (arg[i] == '0' && TOLOWER_ASC(arg[i + 1]) == 'x')
                        i += 2;
#else
                      value = atol((char *)arg);
#endif
                      while (VIM_ISDIGIT(arg[i]))
                        ++i;
                      if (arg[i] != NUL && !vim_iswhite(arg[i]))
                      {
                        errmsg = e_invarg;
                        goto skip;
                      }
                  }
                  else
                  {
                      errmsg = (char_u *)N_("E521: Number required after =");
                      goto skip;
                  }

                  if (adding)
                      value = *(long *)varp + value;
                  if (prepending)
                      value = *(long *)varp * value;
                  if (removing)
                      value = *(long *)varp - value;
                  errmsg = set_num_option(opt_idx, varp, value,
                                 errbuf, sizeof(errbuf), opt_flags);
                }
                else if (opt_idx >= 0)              /* string */
                {
                  char_u          *save_arg = NULL;
                  char_u          *s = NULL;
                  char_u          *oldval;      /* previous value if *varp */
                  char_u          *newval;
                  char_u          *origval;
                  unsigned    newlen;
                  int       comma;
                  int       bs;
                  int       new_value_alloced;  /* new string option
                                             was allocated */

                  /* When using ":set opt=val" for a global option
                   * with a local value the local value will be
                   * reset, use the global value here. */
                  if ((opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0
                        && ((int)options[opt_idx].indir & PV_BOTH))
                      varp = options[opt_idx].var;

                  /* The old value is kept until we are sure that the
                   * new value is valid. */
                  oldval = *(char_u **)varp;
                  if (nextchar == '&')    /* set to default val */
                  {
                      newval = options[opt_idx].def_val[
                                    ((flags & P_VI_DEF) || cp_val)
                                     ?  VI_DEFAULT : VIM_DEFAULT];
                      if ((char_u **)varp == &p_bg)
                      {
                        /* guess the value of 'background' */
#ifdef FEAT_GUI
                        if (gui.in_use)
                            newval = gui_bg_default();
                        else
#endif
                            newval = term_bg_default();
                      }

                      /* expand environment variables and ~ (since the
                       * default value was already expanded, only
                       * required when an environment variable was set
                       * later */
                      if (newval == NULL)
                        newval = empty_option;
                      else
                      {
                        s = option_expand(opt_idx, newval);
                        if (s == NULL)
                            s = newval;
                        newval = vim_strsave(s);
                      }
                      new_value_alloced = TRUE;
                  }
                  else if (nextchar == '<')     /* set to global val */
                  {
                      newval = vim_strsave(*(char_u **)get_varp_scope(
                                   &(options[opt_idx]), OPT_GLOBAL));
                      new_value_alloced = TRUE;
                  }
                  else
                  {
                      ++arg;  /* jump to after the '=' or ':' */

                      /*
                       * Set 'keywordprg' to ":help" if an empty
                       * value was passed to :set by the user.
                       * Misuse errbuf[] for the resulting string.
                       */
                      if (varp == (char_u *)&p_kp
                                    && (*arg == NUL || *arg == ' '))
                      {
                        STRCPY(errbuf, ":help");
                        save_arg = arg;
                        arg = errbuf;
                      }
                      /*
                       * Convert 'whichwrap' number to string, for
                       * backwards compatibility with Vim 3.0.
                       * Misuse errbuf[] for the resulting string.
                       */
                      else if (varp == (char_u *)&p_ww
                                           && VIM_ISDIGIT(*arg))
                      {
                        *errbuf = NUL;
                        i = getdigits(&arg);
                        if (i & 1)
                            STRCAT(errbuf, "b,");
                        if (i & 2)
                            STRCAT(errbuf, "s,");
                        if (i & 4)
                            STRCAT(errbuf, "h,l,");
                        if (i & 8)
                            STRCAT(errbuf, "<,>,");
                        if (i & 16)
                            STRCAT(errbuf, "[,],");
                        if (*errbuf != NUL)     /* remove trailing , */
                            errbuf[STRLEN(errbuf) - 1] = NUL;
                        save_arg = arg;
                        arg = errbuf;
                      }
                      /*
                       * Remove '>' before 'dir' and 'bdir', for
                       * backwards compatibility with version 3.0
                       */
                      else if (  *arg == '>'
                            && (varp == (char_u *)&p_dir
                                  || varp == (char_u *)&p_bdir))
                      {
                        ++arg;
                      }

                      /* When setting the local value of a global
                       * option, the old value may be the global value. */
                      if (((int)options[opt_idx].indir & PV_BOTH)
                                       && (opt_flags & OPT_LOCAL))
                        origval = *(char_u **)get_varp(
                                             &options[opt_idx]);
                      else
                        origval = oldval;

                      /*
                       * Copy the new string into allocated memory.
                       * Can't use set_string_option_direct(), because
                       * we need to remove the backslashes.
                       */
                      /* get a bit too much */
                      newlen = (unsigned)STRLEN(arg) + 1;
                      if (adding || prepending || removing)
                        newlen += (unsigned)STRLEN(origval) + 1;
                      newval = alloc(newlen);
                      if (newval == NULL)  /* out of mem, don't change */
                        break;
                      s = newval;

                      /*
                       * Copy the string, skip over escaped chars.
                       * For MS-DOS and WIN32 backslashes before normal
                       * file name characters are not removed, and keep
                       * backslash at start, for "\\machine\path", but
                       * do remove it for "\\\\machine\\path".
                       * The reverse is found in ExpandOldSetting().
                       */
                      while (*arg && !vim_iswhite(*arg))
                      {
                        if (*arg == '\\' && arg[1] != NUL
#ifdef BACKSLASH_IN_FILENAME
                              && !((flags & P_EXPAND)
                                    && vim_isfilec(arg[1])
                                    && (arg[1] != '\\'
                                        || (s == newval
                                          && arg[2] != '\\')))
#endif
                                                    )
                            ++arg;  /* remove backslash */
#ifdef FEAT_MBYTE
                        if (has_mbyte
                              && (i = (*mb_ptr2len)(arg)) > 1)
                        {
                            /* copy multibyte char */
                            mch_memmove(s, arg, (size_t)i);
                            arg += i;
                            s += i;
                        }
                        else
#endif
                            *s++ = *arg++;
                      }
                      *s = NUL;

                      /*
                       * Expand environment variables and ~.
                       * Don't do it when adding without inserting a
                       * comma.
                       */
                      if (!(adding || prepending || removing)
                                           || (flags & P_COMMA))
                      {
                        s = option_expand(opt_idx, newval);
                        if (s != NULL)
                        {
                            vim_free(newval);
                            newlen = (unsigned)STRLEN(s) + 1;
                            if (adding || prepending || removing)
                              newlen += (unsigned)STRLEN(origval) + 1;
                            newval = alloc(newlen);
                            if (newval == NULL)
                              break;
                            STRCPY(newval, s);
                        }
                      }

                      /* locate newval[] in origval[] when removing it
                       * and when adding to avoid duplicates */
                      i = 0;  /* init for GCC */
                      if (removing || (flags & P_NODUP))
                      {
                        i = (int)STRLEN(newval);
                        bs = 0;
                        for (s = origval; *s; ++s)
                        {
                            if ((!(flags & P_COMMA)
                                    || s == origval
                                    || (s[-1] == ',' && !(bs & 1)))
                                  && STRNCMP(s, newval, i) == 0
                                  && (!(flags & P_COMMA)
                                    || s[i] == ','
                                    || s[i] == NUL))
                              break;
                            /* Count backspaces.  Only a comma with an
                             * even number of backspaces before it is
                             * recognized as a separator */
                            if (s > origval && s[-1] == '\\')
                              ++bs;
                            else
                              bs = 0;
                        }

                        /* do not add if already there */
                        if ((adding || prepending) && *s)
                        {
                            prepending = FALSE;
                            adding = FALSE;
                            STRCPY(newval, origval);
                        }
                      }

                      /* concatenate the two strings; add a ',' if
                       * needed */
                      if (adding || prepending)
                      {
                        comma = ((flags & P_COMMA) && *origval != NUL
                                             && *newval != NUL);
                        if (adding)
                        {
                            i = (int)STRLEN(origval);
                            mch_memmove(newval + i + comma, newval,
                                            STRLEN(newval) + 1);
                            mch_memmove(newval, origval, (size_t)i);
                        }
                        else
                        {
                            i = (int)STRLEN(newval);
                            STRMOVE(newval + i + comma, origval);
                        }
                        if (comma)
                            newval[i] = ',';
                      }

                      /* Remove newval[] from origval[]. (Note: "i" has
                       * been set above and is used here). */
                      if (removing)
                      {
                        STRCPY(newval, origval);
                        if (*s)
                        {
                            /* may need to remove a comma */
                            if (flags & P_COMMA)
                            {
                              if (s == origval)
                              {
                                  /* include comma after string */
                                  if (s[i] == ',')
                                    ++i;
                              }
                              else
                              {
                                  /* include comma before string */
                                  --s;
                                  ++i;
                              }
                            }
                            STRMOVE(newval + (s - origval), s + i);
                        }
                      }

                      if (flags & P_FLAGLIST)
                      {
                        /* Remove flags that appear twice. */
                        for (s = newval; *s; ++s)
                            if ((!(flags & P_COMMA) || *s != ',')
                                  && vim_strchr(s + 1, *s) != NULL)
                            {
                              STRMOVE(s, s + 1);
                              --s;
                            }
                      }

                      if (save_arg != NULL)   /* number for 'whichwrap' */
                        arg = save_arg;
                      new_value_alloced = TRUE;
                  }

                  /* Set the new value. */
                  *(char_u **)(varp) = newval;

                  /* Handle side effects, and set the global value for
                   * ":set" on local options. */
                  errmsg = did_set_string_option(opt_idx, (char_u **)varp,
                        new_value_alloced, oldval, errbuf, opt_flags);

                  /* If error detected, print the error message. */
                  if (errmsg != NULL)
                      goto skip;
                }
                else        /* key code option */
                {
                  char_u          *p;

                  if (nextchar == '&')
                  {
                      if (add_termcap_entry(key_name, TRUE) == FAIL)
                        errmsg = (char_u *)N_("E522: Not found in termcap");
                  }
                  else
                  {
                      ++arg; /* jump to after the '=' or ':' */
                      for (p = arg; *p && !vim_iswhite(*p); ++p)
                        if (*p == '\\' && p[1] != NUL)
                            ++p;
                      nextchar = *p;
                      *p = NUL;
                      add_termcode(key_name, arg, FALSE);
                      *p = nextchar;
                  }
                  if (full_screen)
                      ttest(FALSE);
                  redraw_all_later(CLEAR);
                }
            }

            if (opt_idx >= 0)
                did_set_option(opt_idx, opt_flags,
                               !prepending && !adding && !removing);
          }

skip:
          /*
           * Advance to next argument.
           * - skip until a blank found, taking care of backslashes
           * - skip blanks
           * - skip one "=val" argument (for hidden options ":set gfn =xx")
           */
          for (i = 0; i < 2 ; ++i)
          {
            while (*arg != NUL && !vim_iswhite(*arg))
                if (*arg++ == '\\' && *arg != NUL)
                  ++arg;
            arg = skipwhite(arg);
            if (*arg != '=')
                break;
          }
      }

      if (errmsg != NULL)
      {
          vim_strncpy(IObuff, (char_u *)_(errmsg), IOSIZE - 1);
          i = (int)STRLEN(IObuff) + 2;
          if (i + (arg - startarg) < IOSIZE)
          {
            /* append the argument with the error */
            STRCAT(IObuff, ": ");
            mch_memmove(IObuff + i, startarg, (arg - startarg));
            IObuff[i + (arg - startarg)] = NUL;
          }
          /* make sure all characters are printable */
          trans_characters(IObuff, IOSIZE);

          ++no_wait_return;   /* wait_return done later */
          emsg(IObuff); /* show error highlighted */
          --no_wait_return;

          return FAIL;
      }

      arg = skipwhite(arg);
    }

theend:
    if (silent_mode && did_show)
    {
      /* After displaying option values in silent mode. */
      silent_mode = FALSE;
      info_message = TRUE;    /* use mch_msg(), not mch_errmsg() */
      msg_putchar('\n');
      cursor_on();            /* msg_start() switches it off */
      out_flush();
      silent_mode = TRUE;
      info_message = FALSE;   /* use mch_msg(), not mch_errmsg() */
    }

    return OK;
}

/*
 * Call this when an option has been given a new value through a user command.
 * Sets the P_WAS_SET flag and takes care of the P_INSECURE flag.
 */
    static void
did_set_option(opt_idx, opt_flags, new_value)
    int         opt_idx;
    int         opt_flags;        /* possibly with OPT_MODELINE */
    int         new_value;        /* value was replaced completely */
{
    long_u  *p;

    options[opt_idx].flags |= P_WAS_SET;

    /* When an option is set in the sandbox, from a modeline or in secure mode
     * set the P_INSECURE flag.  Otherwise, if a new value is stored reset the
     * flag. */
    p = insecure_flag(opt_idx, opt_flags);
    if (secure
#ifdef HAVE_SANDBOX
          || sandbox != 0
#endif
          || (opt_flags & OPT_MODELINE))
      *p = *p | P_INSECURE;
    else if (new_value)
      *p = *p & ~P_INSECURE;
}

    static char_u *
illegal_char(errbuf, c)
    char_u  *errbuf;
    int           c;
{
    if (errbuf == NULL)
      return (char_u *)"";
    sprintf((char *)errbuf, _("E539: Illegal character <%s>"),
                                          (char *)transchar(c));
    return errbuf;
}

/*
 * Convert a key name or string into a key value.
 * Used for 'wildchar' and 'cedit' options.
 */
    static int
string_to_key(arg)
    char_u  *arg;
{
    if (*arg == '<')
      return find_key_option(arg + 1);
    if (*arg == '^')
      return Ctrl_chr(arg[1]);
    return *arg;
}

#ifdef FEAT_CMDWIN
/*
 * Check value of 'cedit' and set cedit_key.
 * Returns NULL if value is OK, error message otherwise.
 */
    static char_u *
check_cedit()
{
    int n;

    if (*p_cedit == NUL)
      cedit_key = -1;
    else
    {
      n = string_to_key(p_cedit);
      if (vim_isprintc(n))
          return e_invarg;
      cedit_key = n;
    }
    return NULL;
}
#endif

#ifdef FEAT_TITLE
/*
 * When changing 'title', 'titlestring', 'icon' or 'iconstring', call
 * maketitle() to create and display it.
 * When switching the title or icon off, call mch_restore_title() to get
 * the old value back.
 */
    static void
did_set_title(icon)
    int         icon;       /* Did set icon instead of title */
{
    if (starting != NO_SCREEN
#ifdef FEAT_GUI
          && !gui.starting
#endif
                        )
    {
      maketitle();
      if (icon)
      {
          if (!p_icon)
            mch_restore_title(2);
      }
      else
      {
          if (!p_title)
            mch_restore_title(1);
      }
    }
}
#endif

/*
 * set_options_bin -  called when 'bin' changes value.
 */
    void
set_options_bin(oldval, newval, opt_flags)
    int           oldval;
    int           newval;
    int           opt_flags;  /* OPT_LOCAL and/or OPT_GLOBAL */
{
    /*
     * The option values that are changed when 'bin' changes are
     * copied when 'bin is set and restored when 'bin' is reset.
     */
    if (newval)
    {
      if (!oldval)            /* switched on */
      {
          if (!(opt_flags & OPT_GLOBAL))
          {
            curbuf->b_p_tw_nobin = curbuf->b_p_tw;
            curbuf->b_p_wm_nobin = curbuf->b_p_wm;
            curbuf->b_p_ml_nobin = curbuf->b_p_ml;
            curbuf->b_p_et_nobin = curbuf->b_p_et;
          }
          if (!(opt_flags & OPT_LOCAL))
          {
            p_tw_nobin = p_tw;
            p_wm_nobin = p_wm;
            p_ml_nobin = p_ml;
            p_et_nobin = p_et;
          }
      }

      if (!(opt_flags & OPT_GLOBAL))
      {
          curbuf->b_p_tw = 0; /* no automatic line wrap */
          curbuf->b_p_wm = 0; /* no automatic line wrap */
          curbuf->b_p_ml = 0; /* no modelines */
          curbuf->b_p_et = 0; /* no expandtab */
      }
      if (!(opt_flags & OPT_LOCAL))
      {
          p_tw = 0;
          p_wm = 0;
          p_ml = FALSE;
          p_et = FALSE;
          p_bin = TRUE; /* needed when called for the "-b" argument */
      }
    }
    else if (oldval)          /* switched off */
    {
      if (!(opt_flags & OPT_GLOBAL))
      {
          curbuf->b_p_tw = curbuf->b_p_tw_nobin;
          curbuf->b_p_wm = curbuf->b_p_wm_nobin;
          curbuf->b_p_ml = curbuf->b_p_ml_nobin;
          curbuf->b_p_et = curbuf->b_p_et_nobin;
      }
      if (!(opt_flags & OPT_LOCAL))
      {
          p_tw = p_tw_nobin;
          p_wm = p_wm_nobin;
          p_ml = p_ml_nobin;
          p_et = p_et_nobin;
      }
    }
}

#ifdef FEAT_VIMINFO
/*
 * Find the parameter represented by the given character (eg ', :, ", or /),
 * and return its associated value in the 'viminfo' string.
 * Only works for number parameters, not for 'r' or 'n'.
 * If the parameter is not specified in the string or there is no following
 * number, return -1.
 */
    int
get_viminfo_parameter(type)
    int         type;
{
    char_u  *p;

    p = find_viminfo_parameter(type);
    if (p != NULL && VIM_ISDIGIT(*p))
      return atoi((char *)p);
    return -1;
}

/*
 * Find the parameter represented by the given character (eg ''', ':', '"', or
 * '/') in the 'viminfo' option and return a pointer to the string after it.
 * Return NULL if the parameter is not specified in the string.
 */
    char_u *
find_viminfo_parameter(type)
    int         type;
{
    char_u  *p;

    for (p = p_viminfo; *p; ++p)
    {
      if (*p == type)
          return p + 1;
      if (*p == 'n')              /* 'n' is always the last one */
          break;
      p = vim_strchr(p, ',');     /* skip until next ',' */
      if (p == NULL)              /* hit the end without finding parameter */
          break;
    }
    return NULL;
}
#endif

/*
 * Expand environment variables for some string options.
 * These string options cannot be indirect!
 * If "val" is NULL expand the current value of the option.
 * Return pointer to NameBuff, or NULL when not expanded.
 */
    static char_u *
option_expand(opt_idx, val)
    int           opt_idx;
    char_u  *val;
{
    /* if option doesn't need expansion nothing to do */
    if (!(options[opt_idx].flags & P_EXPAND) || options[opt_idx].var == NULL)
      return NULL;

    /* If val is longer than MAXPATHL no meaningful expansion can be done,
     * expand_env() would truncate the string. */
    if (val != NULL && STRLEN(val) > MAXPATHL)
      return NULL;

    if (val == NULL)
      val = *(char_u **)options[opt_idx].var;

    /*
     * Expanding this with NameBuff, expand_env() must not be passed IObuff.
     * Escape spaces when expanding 'tags', they are used to separate file
     * names.
     * For 'spellsuggest' expand after "file:".
     */
    expand_env_esc(val, NameBuff, MAXPATHL,
          (char_u **)options[opt_idx].var == &p_tags, FALSE,
#ifdef FEAT_SPELL
          (char_u **)options[opt_idx].var == &p_sps ? (char_u *)"file:" :
#endif
                          NULL);
    if (STRCMP(NameBuff, val) == 0)   /* they are the same */
      return NULL;

    return NameBuff;
}

/*
 * After setting various option values: recompute variables that depend on
 * option values.
 */
    static void
didset_options()
{
    /* initialize the table for 'iskeyword' et.al. */
    (void)init_chartab();

#ifdef FEAT_MBYTE
    (void)opt_strings_flags(p_cmp, p_cmp_values, &cmp_flags, TRUE);
#endif
    (void)opt_strings_flags(p_bkc, p_bkc_values, &bkc_flags, TRUE);
#ifdef FEAT_SESSION
    (void)opt_strings_flags(p_ssop, p_ssop_values, &ssop_flags, TRUE);
    (void)opt_strings_flags(p_vop, p_ssop_values, &vop_flags, TRUE);
#endif
#ifdef FEAT_FOLDING
    (void)opt_strings_flags(p_fdo, p_fdo_values, &fdo_flags, TRUE);
#endif
    (void)opt_strings_flags(p_dy, p_dy_values, &dy_flags, TRUE);
#ifdef FEAT_VIRTUALEDIT
    (void)opt_strings_flags(p_ve, p_ve_values, &ve_flags, TRUE);
#endif
#if defined(FEAT_MOUSE) && (defined(UNIX) || defined(VMS))
    (void)opt_strings_flags(p_ttym, p_ttym_values, &ttym_flags, FALSE);
#endif
#ifdef FEAT_SPELL
    (void)spell_check_msm();
    (void)spell_check_sps();
    (void)compile_cap_prog(curbuf);
#endif
#if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_W32)
    (void)opt_strings_flags(p_toolbar, p_toolbar_values, &toolbar_flags, TRUE);
#endif
#if defined(FEAT_TOOLBAR) && defined(FEAT_GUI_GTK) && defined(HAVE_GTK2)
    (void)opt_strings_flags(p_tbis, p_tbis_values, &tbis_flags, FALSE);
#endif
#ifdef FEAT_CMDWIN
    /* set cedit_key */
    (void)check_cedit();
#endif
}

/*
 * Check for string options that are NULL (normally only termcap options).
 */
    void
check_options()
{
    int           opt_idx;

    for (opt_idx = 0; options[opt_idx].fullname != NULL; opt_idx++)
      if ((options[opt_idx].flags & P_STRING) && options[opt_idx].var != NULL)
          check_string_option((char_u **)get_varp(&(options[opt_idx])));
}

/*
 * Check string options in a buffer for NULL value.
 */
    void
check_buf_options(buf)
    buf_T   *buf;
{
#if defined(FEAT_QUICKFIX)
    check_string_option(&buf->b_p_bh);
    check_string_option(&buf->b_p_bt);
#endif
#ifdef FEAT_MBYTE
    check_string_option(&buf->b_p_fenc);
#endif
    check_string_option(&buf->b_p_ff);
#ifdef FEAT_FIND_ID
    check_string_option(&buf->b_p_def);
    check_string_option(&buf->b_p_inc);
# ifdef FEAT_EVAL
    check_string_option(&buf->b_p_inex);
# endif
#endif
#if defined(FEAT_CINDENT) && defined(FEAT_EVAL)
    check_string_option(&buf->b_p_inde);
    check_string_option(&buf->b_p_indk);
#endif
#if defined(FEAT_BEVAL) && defined(FEAT_EVAL)
    check_string_option(&buf->b_p_bexpr);
#endif
#if defined(FEAT_EVAL)
    check_string_option(&buf->b_p_fex);
#endif
#ifdef FEAT_CRYPT
    check_string_option(&buf->b_p_key);
#endif
    check_string_option(&buf->b_p_kp);
    check_string_option(&buf->b_p_mps);
    check_string_option(&buf->b_p_fo);
    check_string_option(&buf->b_p_flp);
    check_string_option(&buf->b_p_isk);
#ifdef FEAT_COMMENTS
    check_string_option(&buf->b_p_com);
#endif
#ifdef FEAT_FOLDING
    check_string_option(&buf->b_p_cms);
#endif
    check_string_option(&buf->b_p_nf);
#ifdef FEAT_TEXTOBJ
    check_string_option(&buf->b_p_qe);
#endif
#ifdef FEAT_SYN_HL
    check_string_option(&buf->b_p_syn);
#endif
#ifdef FEAT_SPELL
    check_string_option(&buf->b_p_spc);
    check_string_option(&buf->b_p_spf);
    check_string_option(&buf->b_p_spl);
#endif
#ifdef FEAT_SEARCHPATH
    check_string_option(&buf->b_p_sua);
#endif
#ifdef FEAT_CINDENT
    check_string_option(&buf->b_p_cink);
    check_string_option(&buf->b_p_cino);
#endif
#ifdef FEAT_AUTOCMD
    check_string_option(&buf->b_p_ft);
#endif
#ifdef FEAT_OSFILETYPE
    check_string_option(&buf->b_p_oft);
#endif
#if defined(FEAT_SMARTINDENT) || defined(FEAT_CINDENT)
    check_string_option(&buf->b_p_cinw);
#endif
#ifdef FEAT_INS_EXPAND
    check_string_option(&buf->b_p_cpt);
#endif
#ifdef FEAT_COMPL_FUNC
    check_string_option(&buf->b_p_cfu);
    check_string_option(&buf->b_p_ofu);
#endif
#ifdef FEAT_KEYMAP
    check_string_option(&buf->b_p_keymap);
#endif
#ifdef FEAT_QUICKFIX
    check_string_option(&buf->b_p_gp);
    check_string_option(&buf->b_p_mp);
    check_string_option(&buf->b_p_efm);
#endif
    check_string_option(&buf->b_p_ep);
    check_string_option(&buf->b_p_path);
    check_string_option(&buf->b_p_tags);
#ifdef FEAT_INS_EXPAND
    check_string_option(&buf->b_p_dict);
    check_string_option(&buf->b_p_tsr);
#endif
}

/*
 * Free the string allocated for an option.
 * Checks for the string being empty_option. This may happen if we're out of
 * memory, vim_strsave() returned NULL, which was replaced by empty_option by
 * check_options().
 * Does NOT check for P_ALLOCED flag!
 */
    void
free_string_option(p)
    char_u  *p;
{
    if (p != empty_option)
      vim_free(p);
}

    void
clear_string_option(pp)
    char_u  **pp;
{
    if (*pp != empty_option)
      vim_free(*pp);
    *pp = empty_option;
}

    static void
check_string_option(pp)
    char_u  **pp;
{
    if (*pp == NULL)
      *pp = empty_option;
}

/*
 * Mark a terminal option as allocated, found by a pointer into term_strings[].
 */
    void
set_term_option_alloced(p)
    char_u **p;
{
    int           opt_idx;

    for (opt_idx = 1; options[opt_idx].fullname != NULL; opt_idx++)
      if (options[opt_idx].var == (char_u *)p)
      {
          options[opt_idx].flags |= P_ALLOCED;
          return;
      }
    return; /* cannot happen: didn't find it! */
}

#if defined(FEAT_EVAL) || defined(PROTO)
/*
 * Return TRUE when option "opt" was set from a modeline or in secure mode.
 * Return FALSE when it wasn't.
 * Return -1 for an unknown option.
 */
    int
was_set_insecurely(opt, opt_flags)
    char_u  *opt;
    int         opt_flags;
{
    int         idx = findoption(opt);
    long_u  *flagp;

    if (idx >= 0)
    {
      flagp = insecure_flag(idx, opt_flags);
      return (*flagp & P_INSECURE) != 0;
    }
    EMSG2(_(e_intern2), "was_set_insecurely()");
    return -1;
}

/*
 * Get a pointer to the flags used for the P_INSECURE flag of option
 * "opt_idx".  For some local options a local flags field is used.
 */
    static long_u *
insecure_flag(opt_idx, opt_flags)
    int           opt_idx;
    int           opt_flags;
{
    if (opt_flags & OPT_LOCAL)
      switch ((int)options[opt_idx].indir)
      {
#ifdef FEAT_STL_OPT
          case PV_STL:  return &curwin->w_p_stl_flags;
#endif
#ifdef FEAT_EVAL
# ifdef FEAT_FOLDING
          case PV_FDE:  return &curwin->w_p_fde_flags;
          case PV_FDT:  return &curwin->w_p_fdt_flags;
# endif
# ifdef FEAT_BEVAL
          case PV_BEXPR:      return &curbuf->b_p_bexpr_flags;
# endif
# if defined(FEAT_CINDENT)
          case PV_INDE: return &curbuf->b_p_inde_flags;
# endif
          case PV_FEX:  return &curbuf->b_p_fex_flags;
# ifdef FEAT_FIND_ID
          case PV_INEX: return &curbuf->b_p_inex_flags;
# endif
#endif
      }

    /* Nothing special, return global flags field. */
    return &options[opt_idx].flags;
}
#endif

#ifdef FEAT_TITLE
static void redraw_titles __ARGS((void));

/*
 * Redraw the window title and/or tab page text later.
 */
static void redraw_titles()
{
    need_maketitle = TRUE;
# ifdef FEAT_WINDOWS
    redraw_tabline = TRUE;
# endif
}
#endif

/*
 * Set a string option to a new value (without checking the effect).
 * The string is copied into allocated memory.
 * if ("opt_idx" == -1) "name" is used, otherwise "opt_idx" is used.
 * When "set_sid" is zero set the scriptID to current_SID.  When "set_sid" is
 * SID_NONE don't set the scriptID.  Otherwise set the scriptID to "set_sid".
 */
    void
set_string_option_direct(name, opt_idx, val, opt_flags, set_sid)
    char_u  *name;
    int           opt_idx;
    char_u  *val;
    int           opt_flags;  /* OPT_FREE, OPT_LOCAL and/or OPT_GLOBAL */
    int           set_sid UNUSED;
{
    char_u  *s;
    char_u  **varp;
    int           both = (opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0;
    int           idx = opt_idx;

    if (idx == -1)            /* use name */
    {
      idx = findoption(name);
      if (idx < 0)      /* not found (should not happen) */
      {
          EMSG2(_(e_intern2), "set_string_option_direct()");
          return;
      }
    }

    if (options[idx].var == NULL)   /* can't set hidden option */
      return;

    s = vim_strsave(val);
    if (s != NULL)
    {
      varp = (char_u **)get_varp_scope(&(options[idx]),
                                     both ? OPT_LOCAL : opt_flags);
      if ((opt_flags & OPT_FREE) && (options[idx].flags & P_ALLOCED))
          free_string_option(*varp);
      *varp = s;

      /* For buffer/window local option may also set the global value. */
      if (both)
          set_string_option_global(idx, varp);

      options[idx].flags |= P_ALLOCED;

      /* When setting both values of a global option with a local value,
       * make the local value empty, so that the global value is used. */
      if (((int)options[idx].indir & PV_BOTH) && both)
      {
          free_string_option(*varp);
          *varp = empty_option;
      }
# ifdef FEAT_EVAL
      if (set_sid != SID_NONE)
          set_option_scriptID_idx(idx, opt_flags,
                              set_sid == 0 ? current_SID : set_sid);
# endif
    }
}

/*
 * Set global value for string option when it's a local option.
 */
    static void
set_string_option_global(opt_idx, varp)
    int           opt_idx;    /* option index */
    char_u  **varp;           /* pointer to option variable */
{
    char_u  **p, *s;

    /* the global value is always allocated */
    if (options[opt_idx].var == VAR_WIN)
      p = (char_u **)GLOBAL_WO(varp);
    else
      p = (char_u **)options[opt_idx].var;
    if (options[opt_idx].indir != PV_NONE
          && p != varp
          && (s = vim_strsave(*varp)) != NULL)
    {
      free_string_option(*p);
      *p = s;
    }
}

/*
 * Set a string option to a new value, and handle the effects.
 */
    static void
set_string_option(opt_idx, value, opt_flags)
    int           opt_idx;
    char_u  *value;
    int           opt_flags;  /* OPT_LOCAL and/or OPT_GLOBAL */
{
    char_u  *s;
    char_u  **varp;
    char_u  *oldval;

    if (options[opt_idx].var == NULL)     /* don't set hidden option */
      return;

    s = vim_strsave(value);
    if (s != NULL)
    {
      varp = (char_u **)get_varp_scope(&(options[opt_idx]),
            (opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0
                ? (((int)options[opt_idx].indir & PV_BOTH)
                  ? OPT_GLOBAL : OPT_LOCAL)
                : opt_flags);
      oldval = *varp;
      *varp = s;
      if (did_set_string_option(opt_idx, varp, TRUE, oldval, NULL,
                                             opt_flags) == NULL)
          did_set_option(opt_idx, opt_flags, TRUE);
    }
}

/*
 * Handle string options that need some action to perform when changed.
 * Returns NULL for success, or an error message for an error.
 */
    static char_u *
did_set_string_option(opt_idx, varp, new_value_alloced, oldval, errbuf,
                                                    opt_flags)
    int           opt_idx;          /* index in options[] table */
    char_u  **varp;                 /* pointer to the option variable */
    int           new_value_alloced;      /* new value was allocated */
    char_u  *oldval;          /* previous value of the option */
    char_u  *errbuf;          /* buffer for errors, or NULL */
    int           opt_flags;        /* OPT_LOCAL and/or OPT_GLOBAL */
{
    char_u  *errmsg = NULL;
    char_u  *s, *p;
    int           did_chartab = FALSE;
    char_u  **gvarp;
    long_u  free_oldval = (options[opt_idx].flags & P_ALLOCED);
#ifdef FEAT_GUI
    /* set when changing an option that only requires a redraw in the GUI */
    int           redraw_gui_only = FALSE;
#endif

    /* Get the global option to compare with, otherwise we would have to check
     * two values for all local options. */
    gvarp = (char_u **)get_varp_scope(&(options[opt_idx]), OPT_GLOBAL);

    /* Disallow changing some options from secure mode */
    if ((secure
#ifdef HAVE_SANDBOX
            || sandbox != 0
#endif
            ) && (options[opt_idx].flags & P_SECURE))
    {
      errmsg = e_secure;
    }

    /* Check for a "normal" file name in some options.  Disallow a path
     * separator (slash and/or backslash), wildcards and characters that are
     * often illegal in a file name. */
    else if ((options[opt_idx].flags & P_NFNAME)
                   && vim_strpbrk(*varp, (char_u *)"/\\*?[|<>") != NULL)
    {
      errmsg = e_invarg;
    }

    /* 'term' */
    else if (varp == &T_NAME)
    {
      if (T_NAME[0] == NUL)
          errmsg = (char_u *)N_("E529: Cannot set 'term' to empty string");
#ifdef FEAT_GUI
      if (gui.in_use)
          errmsg = (char_u *)N_("E530: Cannot change term in GUI");
      else if (term_is_gui(T_NAME))
          errmsg = (char_u *)N_("E531: Use \":gui\" to start the GUI");
#endif
      else if (set_termname(T_NAME) == FAIL)
          errmsg = (char_u *)N_("E522: Not found in termcap");
      else
          /* Screen colors may have changed. */
          redraw_later_clear();
    }

    /* 'backupcopy' */
    else if (varp == &p_bkc)
    {
      if (opt_strings_flags(p_bkc, p_bkc_values, &bkc_flags, TRUE) != OK)
          errmsg = e_invarg;
      if (((bkc_flags & BKC_AUTO) != 0)
            + ((bkc_flags & BKC_YES) != 0)
            + ((bkc_flags & BKC_NO) != 0) != 1)
      {
          /* Must have exactly one of "auto", "yes"  and "no". */
          (void)opt_strings_flags(oldval, p_bkc_values, &bkc_flags, TRUE);
          errmsg = e_invarg;
      }
    }

    /* 'backupext' and 'patchmode' */
    else if (varp == &p_bex || varp == &p_pm)
    {
      if (STRCMP(*p_bex == '.' ? p_bex + 1 : p_bex,
                 *p_pm == '.' ? p_pm + 1 : p_pm) == 0)
          errmsg = (char_u *)N_("E589: 'backupext' and 'patchmode' are equal");
    }

    /*
     * 'isident', 'iskeyword', 'isprint or 'isfname' option: refill chartab[]
     * If the new option is invalid, use old value.  'lisp' option: refill
     * chartab[] for '-' char
     */
    else if (  varp == &p_isi
          || varp == &(curbuf->b_p_isk)
          || varp == &p_isp
          || varp == &p_isf)
    {
      if (init_chartab() == FAIL)
      {
          did_chartab = TRUE;     /* need to restore it below */
          errmsg = e_invarg;      /* error in value */
      }
    }

    /* 'helpfile' */
    else if (varp == &p_hf)
    {
      /* May compute new values for $VIM and $VIMRUNTIME */
      if (didset_vim)
      {
          vim_setenv((char_u *)"VIM", (char_u *)"");
          didset_vim = FALSE;
      }
      if (didset_vimruntime)
      {
          vim_setenv((char_u *)"VIMRUNTIME", (char_u *)"");
          didset_vimruntime = FALSE;
      }
    }

#ifdef FEAT_MULTI_LANG
    /* 'helplang' */
    else if (varp == &p_hlg)
    {
      /* Check for "", "ab", "ab,cd", etc. */
      for (s = p_hlg; *s != NUL; s += 3)
      {
          if (s[1] == NUL || ((s[2] != ',' || s[3] == NUL) && s[2] != NUL))
          {
            errmsg = e_invarg;
            break;
          }
          if (s[2] == NUL)
            break;
      }
    }
#endif

    /* 'highlight' */
    else if (varp == &p_hl)
    {
      if (highlight_changed() == FAIL)
          errmsg = e_invarg;  /* invalid flags */
    }

    /* 'nrformats' */
    else if (gvarp == &p_nf)
    {
      if (check_opt_strings(*varp, p_nf_values, TRUE) != OK)
          errmsg = e_invarg;
    }

#ifdef FEAT_SESSION
    /* 'sessionoptions' */
    else if (varp == &p_ssop)
    {
      if (opt_strings_flags(p_ssop, p_ssop_values, &ssop_flags, TRUE) != OK)
          errmsg = e_invarg;
      if ((ssop_flags & SSOP_CURDIR) && (ssop_flags & SSOP_SESDIR))
      {
          /* Don't allow both "sesdir" and "curdir". */
          (void)opt_strings_flags(oldval, p_ssop_values, &ssop_flags, TRUE);
          errmsg = e_invarg;
      }
    }
    /* 'viewoptions' */
    else if (varp == &p_vop)
    {
      if (opt_strings_flags(p_vop, p_ssop_values, &vop_flags, TRUE) != OK)
          errmsg = e_invarg;
    }
#endif

    /* 'scrollopt' */
#ifdef FEAT_SCROLLBIND
    else if (varp == &p_sbo)
    {
      if (check_opt_strings(p_sbo, p_scbopt_values, TRUE) != OK)
          errmsg = e_invarg;
    }
#endif

    /* 'ambiwidth' */
#ifdef FEAT_MBYTE
    else if (varp == &p_ambw)
    {
      if (check_opt_strings(p_ambw, p_ambw_values, FALSE) != OK)
          errmsg = e_invarg;
    }
#endif

    /* 'background' */
    else if (varp == &p_bg)
    {
      if (check_opt_strings(p_bg, p_bg_values, FALSE) == OK)
      {
#ifdef FEAT_EVAL
          int dark = (*p_bg == 'd');
#endif

          init_highlight(FALSE, FALSE);

#ifdef FEAT_EVAL
          if (dark != (*p_bg == 'd')
                    && get_var_value((char_u *)"g:colors_name") != NULL)
          {
            /* The color scheme must have set 'background' back to another
             * value, that's not what we want here.  Disable the color
             * scheme and set the colors again. */
            do_unlet((char_u *)"g:colors_name", TRUE);
            free_string_option(p_bg);
            p_bg = vim_strsave((char_u *)(dark ? "dark" : "light"));
            check_string_option(&p_bg);
            init_highlight(FALSE, FALSE);
          }
#endif
      }
      else
          errmsg = e_invarg;
    }

    /* 'wildmode' */
    else if (varp == &p_wim)
    {
      if (check_opt_wim() == FAIL)
          errmsg = e_invarg;
    }

#ifdef FEAT_CMDL_COMPL
    /* 'wildoptions' */
    else if (varp == &p_wop)
    {
      if (check_opt_strings(p_wop, p_wop_values, TRUE) != OK)
          errmsg = e_invarg;
    }
#endif

#ifdef FEAT_WAK
    /* 'winaltkeys' */
    else if (varp == &p_wak)
    {
      if (*p_wak == NUL
            || check_opt_strings(p_wak, p_wak_values, FALSE) != OK)
          errmsg = e_invarg;
# ifdef FEAT_MENU
#  ifdef FEAT_GUI_MOTIF
      else if (gui.in_use)
          gui_motif_set_mnemonics(p_wak[0] == 'y' || p_wak[0] == 'm');
#  else
#   ifdef FEAT_GUI_GTK
      else if (gui.in_use)
          gui_gtk_set_mnemonics(p_wak[0] == 'y' || p_wak[0] == 'm');
#   endif
#  endif
# endif
    }
#endif

#ifdef FEAT_AUTOCMD
    /* 'eventignore' */
    else if (varp == &p_ei)
    {
      if (check_ei() == FAIL)
          errmsg = e_invarg;
    }
#endif

#ifdef FEAT_MBYTE
    /* 'encoding' and 'fileencoding' */
    else if (varp == &p_enc || gvarp == &p_fenc || varp == &p_tenc)
    {
      if (gvarp == &p_fenc)
      {
          if (!curbuf->b_p_ma && opt_flags != OPT_GLOBAL)
            errmsg = e_modifiable;
          else if (vim_strchr(*varp, ',') != NULL)
            /* No comma allowed in 'fileencoding'; catches confusing it
             * with 'fileencodings'. */
            errmsg = e_invarg;
          else
          {
# ifdef FEAT_TITLE
            /* May show a "+" in the title now. */
            redraw_titles();
# endif
            /* Add 'fileencoding' to the swap file. */
            ml_setflags(curbuf);
          }
      }
      if (errmsg == NULL)
      {
          /* canonize the value, so that STRCMP() can be used on it */
          p = enc_canonize(*varp);
          if (p != NULL)
          {
            vim_free(*varp);
            *varp = p;
          }
          if (varp == &p_enc)
          {
            errmsg = mb_init();
# ifdef FEAT_TITLE
            redraw_titles();
# endif
          }
      }

# if defined(FEAT_GUI_GTK) && defined(HAVE_GTK2)
      if (errmsg == NULL && varp == &p_tenc && gui.in_use)
      {
          /* GTK+ 2 uses only a single encoding, and that is UTF-8. */
          if (STRCMP(p_tenc, "utf-8") != 0)
            errmsg = (char_u *)N_("E617: Cannot be changed in the GTK+ 2 GUI");
      }
# endif

      if (errmsg == NULL)
      {
# ifdef FEAT_KEYMAP
          /* When 'keymap' is used and 'encoding' changes, reload the keymap
           * (with another encoding). */
          if (varp == &p_enc && *curbuf->b_p_keymap != NUL)
            (void)keymap_init();
# endif

          /* When 'termencoding' is not empty and 'encoding' changes or when
           * 'termencoding' changes, need to setup for keyboard input and
           * display output conversion. */
          if (((varp == &p_enc && *p_tenc != NUL) || varp == &p_tenc))
          {
            convert_setup(&input_conv, p_tenc, p_enc);
            convert_setup(&output_conv, p_enc, p_tenc);
          }

# if defined(WIN3264) && defined(FEAT_MBYTE)
          /* $HOME may have characters in active code page. */
          if (varp == &p_enc)
            init_homedir();
# endif
      }
    }
#endif

#if defined(FEAT_POSTSCRIPT)
    else if (varp == &p_penc)
    {
      /* Canonize printencoding if VIM standard one */
      p = enc_canonize(p_penc);
      if (p != NULL)
      {
          vim_free(p_penc);
          p_penc = p;
      }
      else
      {
          /* Ensure lower case and '-' for '_' */
          for (s = p_penc; *s != NUL; s++)
          {
            if (*s == '_')
                *s = '-';
            else
                *s = TOLOWER_ASC(*s);
          }
      }
    }
#endif

#if defined(FEAT_XIM) && defined(FEAT_GUI_GTK)
    else if (varp == &p_imak)
    {
      if (gui.in_use && !im_xim_isvalid_imactivate())
          errmsg = e_invarg;
    }
#endif

#ifdef FEAT_KEYMAP
    else if (varp == &curbuf->b_p_keymap)
    {
      /* load or unload key mapping tables */
      errmsg = keymap_init();

      if (errmsg == NULL)
      {
          if (*curbuf->b_p_keymap != NUL)
          {
            /* Installed a new keymap, switch on using it. */
            curbuf->b_p_iminsert = B_IMODE_LMAP;
            if (curbuf->b_p_imsearch != B_IMODE_USE_INSERT)
                curbuf->b_p_imsearch = B_IMODE_LMAP;
          }
          else
          {
            /* Cleared the keymap, may reset 'iminsert' and 'imsearch'. */
            if (curbuf->b_p_iminsert == B_IMODE_LMAP)
                curbuf->b_p_iminsert = B_IMODE_NONE;
            if (curbuf->b_p_imsearch == B_IMODE_LMAP)
                curbuf->b_p_imsearch = B_IMODE_USE_INSERT;
          }
          if ((opt_flags & OPT_LOCAL) == 0)
          {
            set_iminsert_global();
            set_imsearch_global();
          }
# ifdef FEAT_WINDOWS
          status_redraw_curbuf();
# endif
      }
    }
#endif

    /* 'fileformat' */
    else if (gvarp == &p_ff)
    {
      if (!curbuf->b_p_ma && !(opt_flags & OPT_GLOBAL))
          errmsg = e_modifiable;
      else if (check_opt_strings(*varp, p_ff_values, FALSE) != OK)
          errmsg = e_invarg;
      else
      {
          /* may also change 'textmode' */
          if (get_fileformat(curbuf) == EOL_DOS)
            curbuf->b_p_tx = TRUE;
          else
            curbuf->b_p_tx = FALSE;
#ifdef FEAT_TITLE
          redraw_titles();
#endif
          /* update flag in swap file */
          ml_setflags(curbuf);
      }
    }

    /* 'fileformats' */
    else if (varp == &p_ffs)
    {
      if (check_opt_strings(p_ffs, p_ff_values, TRUE) != OK)
          errmsg = e_invarg;
      else
      {
          /* also change 'textauto' */
          if (*p_ffs == NUL)
            p_ta = FALSE;
          else
            p_ta = TRUE;
      }
    }

#if defined(FEAT_CRYPT) && defined(FEAT_CMDHIST)
    /* 'cryptkey' */
    else if (gvarp == &p_key)
    {
      /* Make sure the ":set" command doesn't show the new value in the
       * history. */
      remove_key_from_history();
    }
#endif

    /* 'matchpairs' */
    else if (gvarp == &p_mps)
    {
      /* Check for "x:y,x:y" */
      for (p = *varp; *p != NUL; p += 4)
      {
          if (p[1] != ':' || p[2] == NUL || (p[3] != NUL && p[3] != ','))
          {
            errmsg = e_invarg;
            break;
          }
          if (p[3] == NUL)
            break;
      }
    }

#ifdef FEAT_COMMENTS
    /* 'comments' */
    else if (gvarp == &p_com)
    {
      for (s = *varp; *s; )
      {
          while (*s && *s != ':')
          {
            if (vim_strchr((char_u *)COM_ALL, *s) == NULL
                                   && !VIM_ISDIGIT(*s) && *s != '-')
            {
                errmsg = illegal_char(errbuf, *s);
                break;
            }
            ++s;
          }
          if (*s++ == NUL)
            errmsg = (char_u *)N_("E524: Missing colon");
          else if (*s == ',' || *s == NUL)
            errmsg = (char_u *)N_("E525: Zero length string");
          if (errmsg != NULL)
            break;
          while (*s && *s != ',')
          {
            if (*s == '\\' && s[1] != NUL)
                ++s;
            ++s;
          }
          s = skip_to_option_part(s);
      }
    }
#endif

    /* 'listchars' */
    else if (varp == &p_lcs)
    {
      errmsg = set_chars_option(varp);
    }

#if defined(FEAT_WINDOWS) || defined(FEAT_FOLDING)
    /* 'fillchars' */
    else if (varp == &p_fcs)
    {
      errmsg = set_chars_option(varp);
    }
#endif

#ifdef FEAT_CMDWIN
    /* 'cedit' */
    else if (varp == &p_cedit)
    {
      errmsg = check_cedit();
    }
#endif

    /* 'verbosefile' */
    else if (varp == &p_vfile)
    {
      verbose_stop();
      if (*p_vfile != NUL && verbose_open() == FAIL)
          errmsg = e_invarg;
    }

#ifdef FEAT_VIMINFO
    /* 'viminfo' */
    else if (varp == &p_viminfo)
    {
      for (s = p_viminfo; *s;)
      {
          /* Check it's a valid character */
          if (vim_strchr((char_u *)"!\"%'/:<@cfhnrs", *s) == NULL)
          {
            errmsg = illegal_char(errbuf, *s);
            break;
          }
          if (*s == 'n')      /* name is always last one */
          {
            break;
          }
          else if (*s == 'r') /* skip until next ',' */
          {
            while (*++s && *s != ',')
                ;
          }
          else if (*s == '%')
          {
            /* optional number */
            while (vim_isdigit(*++s))
                ;
          }
          else if (*s == '!' || *s == 'h' || *s == 'c')
            ++s;        /* no extra chars */
          else          /* must have a number */
          {
            while (vim_isdigit(*++s))
                ;

            if (!VIM_ISDIGIT(*(s - 1)))
            {
                if (errbuf != NULL)
                {
                  sprintf((char *)errbuf,
                               _("E526: Missing number after <%s>"),
                                        transchar_byte(*(s - 1)));
                  errmsg = errbuf;
                }
                else
                  errmsg = (char_u *)"";
                break;
            }
          }
          if (*s == ',')
            ++s;
          else if (*s)
          {
            if (errbuf != NULL)
                errmsg = (char_u *)N_("E527: Missing comma");
            else
                errmsg = (char_u *)"";
            break;
          }
      }
      if (*p_viminfo && errmsg == NULL && get_viminfo_parameter('\'') < 0)
          errmsg = (char_u *)N_("E528: Must specify a ' value");
    }
#endif /* FEAT_VIMINFO */

    /* terminal options */
    else if (istermoption(&options[opt_idx]) && full_screen)
    {
      /* ":set t_Co=0" and ":set t_Co=1" do ":set t_Co=" */
      if (varp == &T_CCO)
      {
          int colors = atoi((char *)T_CCO);

          /* Only reinitialize colors if t_Co value has really changed to
           * avoid expensive reload of colorscheme if t_Co is set to the
           * same value multiple times. */
          if (colors != t_colors)
          {
            t_colors = colors;
            if (t_colors <= 1)
            {
                if (new_value_alloced)
                  vim_free(T_CCO);
                T_CCO = empty_option;
            }
            /* We now have a different color setup, initialize it again. */
            init_highlight(TRUE, FALSE);
          }
      }
      ttest(FALSE);
      if (varp == &T_ME)
      {
          out_str(T_ME);
          redraw_later(CLEAR);
#if defined(MSDOS) || (defined(WIN3264) && !defined(FEAT_GUI_W32))
          /* Since t_me has been set, this probably means that the user
           * wants to use this as default colors.  Need to reset default
           * background/foreground colors. */
          mch_set_normal_colors();
#endif
      }
    }

#ifdef FEAT_LINEBREAK
    /* 'showbreak' */
    else if (varp == &p_sbr)
    {
      for (s = p_sbr; *s; )
      {
          if (ptr2cells(s) != 1)
            errmsg = (char_u *)N_("E595: contains unprintable or wide character");
          mb_ptr_adv(s);
      }
    }
#endif

#ifdef FEAT_GUI
    /* 'guifont' */
    else if (varp == &p_guifont)
    {
      if (gui.in_use)
      {
          p = p_guifont;
# if defined(FEAT_GUI_GTK)
          /*
           * Put up a font dialog and let the user select a new value.
           * If this is cancelled go back to the old value but don't
           * give an error message.
           */
          if (STRCMP(p, "*") == 0)
          {
            p = gui_mch_font_dialog(oldval);

            if (new_value_alloced)
                free_string_option(p_guifont);

            p_guifont = (p != NULL) ? p : vim_strsave(oldval);
            new_value_alloced = TRUE;
          }
# endif
          if (p != NULL && gui_init_font(p_guifont, FALSE) != OK)
          {
# if defined(FEAT_GUI_MSWIN) || defined(FEAT_GUI_PHOTON)
            if (STRCMP(p_guifont, "*") == 0)
            {
                /* Dialog was cancelled: Keep the old value without giving
                 * an error message. */
                if (new_value_alloced)
                  free_string_option(p_guifont);
                p_guifont = vim_strsave(oldval);
                new_value_alloced = TRUE;
            }
            else
# endif
                errmsg = (char_u *)N_("E596: Invalid font(s)");
          }
      }
      redraw_gui_only = TRUE;
    }
# ifdef FEAT_XFONTSET
    else if (varp == &p_guifontset)
    {
      if (STRCMP(p_guifontset, "*") == 0)
          errmsg = (char_u *)N_("E597: can't select fontset");
      else if (gui.in_use && gui_init_font(p_guifontset, TRUE) != OK)
          errmsg = (char_u *)N_("E598: Invalid fontset");
      redraw_gui_only = TRUE;
    }
# endif
# ifdef FEAT_MBYTE
    else if (varp == &p_guifontwide)
    {
      if (STRCMP(p_guifontwide, "*") == 0)
          errmsg = (char_u *)N_("E533: can't select wide font");
      else if (gui_get_wide_font() == FAIL)
          errmsg = (char_u *)N_("E534: Invalid wide font");
      redraw_gui_only = TRUE;
    }
# endif
#endif

#ifdef CURSOR_SHAPE
    /* 'guicursor' */
    else if (varp == &p_guicursor)
      errmsg = parse_shape_opt(SHAPE_CURSOR);
#endif

#ifdef FEAT_MOUSESHAPE
    /* 'mouseshape' */
    else if (varp == &p_mouseshape)
    {
      errmsg = parse_shape_opt(SHAPE_MOUSE);
      update_mouseshape(-1);
    }
#endif

#ifdef FEAT_PRINTER
    else if (varp == &p_popt)
      errmsg = parse_printoptions();
# if defined(FEAT_MBYTE) && defined(FEAT_POSTSCRIPT)
    else if (varp == &p_pmfn)
      errmsg = parse_printmbfont();
# endif
#endif

#ifdef FEAT_LANGMAP
    /* 'langmap' */
    else if (varp == &p_langmap)
      langmap_set();
#endif

#ifdef FEAT_LINEBREAK
    /* 'breakat' */
    else if (varp == &p_breakat)
      fill_breakat_flags();
#endif

#ifdef FEAT_TITLE
    /* 'titlestring' and 'iconstring' */
    else if (varp == &p_titlestring || varp == &p_iconstring)
    {
# ifdef FEAT_STL_OPT
      int   flagval = (varp == &p_titlestring) ? STL_IN_TITLE : STL_IN_ICON;

      /* NULL => statusline syntax */
      if (vim_strchr(*varp, '%') && check_stl_option(*varp) == NULL)
          stl_syntax |= flagval;
      else
          stl_syntax &= ~flagval;
# endif
      did_set_title(varp == &p_iconstring);

    }
#endif

#ifdef FEAT_GUI
    /* 'guioptions' */
    else if (varp == &p_go)
    {
      gui_init_which_components(oldval);
      redraw_gui_only = TRUE;
    }
#endif

#if defined(FEAT_GUI_TABLINE)
    /* 'guitablabel' */
    else if (varp == &p_gtl)
    {
      redraw_tabline = TRUE;
      redraw_gui_only = TRUE;
    }
    /* 'guitabtooltip' */
    else if (varp == &p_gtt)
    {
      redraw_gui_only = TRUE;
    }
#endif

#if defined(FEAT_MOUSE_TTY) && (defined(UNIX) || defined(VMS))
    /* 'ttymouse' */
    else if (varp == &p_ttym)
    {
      /* Switch the mouse off before changing the escape sequences used for
       * that. */
      mch_setmouse(FALSE);
      if (opt_strings_flags(p_ttym, p_ttym_values, &ttym_flags, FALSE) != OK)
          errmsg = e_invarg;
      else
          check_mouse_termcode();
      if (termcap_active)
          setmouse();         /* may switch it on again */
    }
#endif

#ifdef FEAT_VISUAL
    /* 'selection' */
    else if (varp == &p_sel)
    {
      if (*p_sel == NUL
            || check_opt_strings(p_sel, p_sel_values, FALSE) != OK)
          errmsg = e_invarg;
    }

    /* 'selectmode' */
    else if (varp == &p_slm)
    {
      if (check_opt_strings(p_slm, p_slm_values, TRUE) != OK)
          errmsg = e_invarg;
    }
#endif

#ifdef FEAT_BROWSE
    /* 'browsedir' */
    else if (varp == &p_bsdir)
    {
      if (check_opt_strings(p_bsdir, p_bsdir_values, FALSE) != OK
            && !mch_isdir(p_bsdir))
          errmsg = e_invarg;
    }
#endif

#ifdef FEAT_VISUAL
    /* 'keymodel' */
    else if (varp == &p_km)
    {
      if (check_opt_strings(p_km, p_km_values, TRUE) != OK)
          errmsg = e_invarg;
      else
      {
          km_stopsel = (vim_strchr(p_km, 'o') != NULL);
          km_startsel = (vim_strchr(p_km, 'a') != NULL);
      }
    }
#endif

    /* 'mousemodel' */
    else if (varp == &p_mousem)
    {
      if (check_opt_strings(p_mousem, p_mousem_values, FALSE) != OK)
          errmsg = e_invarg;
#if defined(FEAT_GUI_MOTIF) && defined(FEAT_MENU) && (XmVersion <= 1002)
      else if (*p_mousem != *oldval)
          /* Changed from "extend" to "popup" or "popup_setpos" or vv: need
           * to create or delete the popup menus. */
          gui_motif_update_mousemodel(root_menu);
#endif
    }

    /* 'switchbuf' */
    else if (varp == &p_swb)
    {
      if (opt_strings_flags(p_swb, p_swb_values, &swb_flags, TRUE) != OK)
          errmsg = e_invarg;
    }

    /* 'debug' */
    else if (varp == &p_debug)
    {
      if (check_opt_strings(p_debug, p_debug_values, TRUE) != OK)
          errmsg = e_invarg;
    }

    /* 'display' */
    else if (varp == &p_dy)
    {
      if (opt_strings_flags(p_dy, p_dy_values, &dy_flags, TRUE) != OK)
          errmsg = e_invarg;
      else
          (void)init_chartab();

    }

#ifdef FEAT_VERTSPLIT
    /* 'eadirection' */
    else if (varp == &p_ead)
    {
      if (check_opt_strings(p_ead, p_ead_values, FALSE) != OK)
          errmsg = e_invarg;
    }
#endif

#ifdef FEAT_CLIPBOARD
    /* 'clipboard' */
    else if (varp == &p_cb)
      errmsg = check_clipboard_option();
#endif

#ifdef FEAT_SPELL
    /* When 'spelllang' or 'spellfile' is set and there is a window for this
     * buffer in which 'spell' is set load the wordlists. */
    else if (varp == &(curbuf->b_p_spl) || varp == &(curbuf->b_p_spf))
    {
      win_T     *wp;
      int       l;

      if (varp == &(curbuf->b_p_spf))
      {
          l = (int)STRLEN(curbuf->b_p_spf);
          if (l > 0 && (l < 4 || STRCMP(curbuf->b_p_spf + l - 4,
                                                ".add") != 0))
            errmsg = e_invarg;
      }

      if (errmsg == NULL)
      {
          FOR_ALL_WINDOWS(wp)
            if (wp->w_buffer == curbuf && wp->w_p_spell)
            {
                errmsg = did_set_spelllang(curbuf);
# ifdef FEAT_WINDOWS
                break;
# endif
            }
      }
    }
    /* When 'spellcapcheck' is set compile the regexp program. */
    else if (varp == &(curbuf->b_p_spc))
    {
      errmsg = compile_cap_prog(curbuf);
    }
    /* 'spellsuggest' */
    else if (varp == &p_sps)
    {
      if (spell_check_sps() != OK)
          errmsg = e_invarg;
    }
    /* 'mkspellmem' */
    else if (varp == &p_msm)
    {
      if (spell_check_msm() != OK)
          errmsg = e_invarg;
    }
#endif

#ifdef FEAT_QUICKFIX
    /* When 'bufhidden' is set, check for valid value. */
    else if (gvarp == &p_bh)
    {
      if (check_opt_strings(curbuf->b_p_bh, p_bufhidden_values, FALSE) != OK)
          errmsg = e_invarg;
    }

    /* When 'buftype' is set, check for valid value. */
    else if (gvarp == &p_bt)
    {
      if (check_opt_strings(curbuf->b_p_bt, p_buftype_values, FALSE) != OK)
          errmsg = e_invarg;
      else
      {
# ifdef FEAT_WINDOWS
          if (curwin->w_status_height)
          {
            curwin->w_redr_status = TRUE;
            redraw_later(VALID);
          }
# endif
          curbuf->b_help = (curbuf->b_p_bt[0] == 'h');
      }
    }
#endif

#ifdef FEAT_STL_OPT
    /* 'statusline' or 'rulerformat' */
    else if (gvarp == &p_stl || varp == &p_ruf)
    {
      int wid;

      if (varp == &p_ruf)     /* reset ru_wid first */
          ru_wid = 0;
      s = *varp;
      if (varp == &p_ruf && *s == '%')
      {
          /* set ru_wid if 'ruf' starts with "%99(" */
          if (*++s == '-')    /* ignore a '-' */
            s++;
          wid = getdigits(&s);
          if (wid && *s == '(' && (errmsg = check_stl_option(p_ruf)) == NULL)
            ru_wid = wid;
          else
            errmsg = check_stl_option(p_ruf);
      }
      /* check 'statusline' only if it doesn't start with "%!" */
      else if (varp == &p_ruf || s[0] != '%' || s[1] != '!')
          errmsg = check_stl_option(s);
      if (varp == &p_ruf && errmsg == NULL)
          comp_col();
    }
#endif

#ifdef FEAT_INS_EXPAND
    /* check if it is a valid value for 'complete' -- Acevedo */
    else if (gvarp == &p_cpt)
    {
      for (s = *varp; *s;)
      {
          while(*s == ',' || *s == ' ')
            s++;
          if (!*s)
            break;
          if (vim_strchr((char_u *)".wbuksid]tU", *s) == NULL)
          {
            errmsg = illegal_char(errbuf, *s);
            break;
          }
          if (*++s != NUL && *s != ',' && *s != ' ')
          {
            if (s[-1] == 'k' || s[-1] == 's')
            {
                /* skip optional filename after 'k' and 's' */
                while (*s && *s != ',' && *s != ' ')
                {
                  if (*s == '\\')
                      ++s;
                  ++s;
                }
            }
            else
            {
                if (errbuf != NULL)
                {
                  sprintf((char *)errbuf,
                             _("E535: Illegal character after <%c>"),
                             *--s);
                  errmsg = errbuf;
                }
                else
                  errmsg = (char_u *)"";
                break;
            }
          }
      }
    }

    /* 'completeopt' */
    else if (varp == &p_cot)
    {
      if (check_opt_strings(p_cot, p_cot_values, TRUE) != OK)
          errmsg = e_invarg;
    }
#endif /* FEAT_INS_EXPAND */


#if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_W32)
    else if (varp == &p_toolbar)
    {
      if (opt_strings_flags(p_toolbar, p_toolbar_values,
                        &toolbar_flags, TRUE) != OK)
          errmsg = e_invarg;
      else
      {
          out_flush();
          gui_mch_show_toolbar((toolbar_flags &
                          (TOOLBAR_TEXT | TOOLBAR_ICONS)) != 0);
      }
    }
#endif

#if defined(FEAT_TOOLBAR) && defined(FEAT_GUI_GTK) && defined(HAVE_GTK2)
    /* 'toolbariconsize': GTK+ 2 only */
    else if (varp == &p_tbis)
    {
      if (opt_strings_flags(p_tbis, p_tbis_values, &tbis_flags, FALSE) != OK)
          errmsg = e_invarg;
      else
      {
          out_flush();
          gui_mch_show_toolbar((toolbar_flags &
                          (TOOLBAR_TEXT | TOOLBAR_ICONS)) != 0);
      }
    }
#endif

    /* 'pastetoggle': translate key codes like in a mapping */
    else if (varp == &p_pt)
    {
      if (*p_pt)
      {
          (void)replace_termcodes(p_pt, &p, TRUE, TRUE, FALSE);
          if (p != NULL)
          {
            if (new_value_alloced)
                free_string_option(p_pt);
            p_pt = p;
            new_value_alloced = TRUE;
          }
      }
    }

    /* 'backspace' */
    else if (varp == &p_bs)
    {
      if (VIM_ISDIGIT(*p_bs))
      {
          if (*p_bs >'2' || p_bs[1] != NUL)
            errmsg = e_invarg;
      }
      else if (check_opt_strings(p_bs, p_bs_values, TRUE) != OK)
          errmsg = e_invarg;
    }

#ifdef FEAT_MBYTE
    /* 'casemap' */
    else if (varp == &p_cmp)
    {
      if (opt_strings_flags(p_cmp, p_cmp_values, &cmp_flags, TRUE) != OK)
          errmsg = e_invarg;
    }
#endif

#ifdef FEAT_DIFF
    /* 'diffopt' */
    else if (varp == &p_dip)
    {
      if (diffopt_changed() == FAIL)
          errmsg = e_invarg;
    }
#endif

#ifdef FEAT_FOLDING
    /* 'foldmethod' */
    else if (gvarp == &curwin->w_allbuf_opt.wo_fdm)
    {
      if (check_opt_strings(*varp, p_fdm_values, FALSE) != OK
            || *curwin->w_p_fdm == NUL)
          errmsg = e_invarg;
      else
          foldUpdateAll(curwin);
    }
# ifdef FEAT_EVAL
    /* 'foldexpr' */
    else if (varp == &curwin->w_p_fde)
    {
      if (foldmethodIsExpr(curwin))
          foldUpdateAll(curwin);
    }
# endif
    /* 'foldmarker' */
    else if (gvarp == &curwin->w_allbuf_opt.wo_fmr)
    {
      p = vim_strchr(*varp, ',');
      if (p == NULL)
          errmsg = (char_u *)N_("E536: comma required");
      else if (p == *varp || p[1] == NUL)
          errmsg = e_invarg;
      else if (foldmethodIsMarker(curwin))
          foldUpdateAll(curwin);
    }
    /* 'commentstring' */
    else if (gvarp == &p_cms)
    {
      if (**varp != NUL && strstr((char *)*varp, "%s") == NULL)
          errmsg = (char_u *)N_("E537: 'commentstring' must be empty or contain %s");
    }
    /* 'foldopen' */
    else if (varp == &p_fdo)
    {
      if (opt_strings_flags(p_fdo, p_fdo_values, &fdo_flags, TRUE) != OK)
          errmsg = e_invarg;
    }
    /* 'foldclose' */
    else if (varp == &p_fcl)
    {
      if (check_opt_strings(p_fcl, p_fcl_values, TRUE) != OK)
          errmsg = e_invarg;
    }
    /* 'foldignore' */
    else if (gvarp == &curwin->w_allbuf_opt.wo_fdi)
    {
      if (foldmethodIsIndent(curwin))
          foldUpdateAll(curwin);
    }
#endif

#ifdef FEAT_VIRTUALEDIT
    /* 'virtualedit' */
    else if (varp == &p_ve)
    {
      if (opt_strings_flags(p_ve, p_ve_values, &ve_flags, TRUE) != OK)
          errmsg = e_invarg;
      else if (STRCMP(p_ve, oldval) != 0)
      {
          /* Recompute cursor position in case the new 've' setting
           * changes something. */
          validate_virtcol();
          coladvance(curwin->w_virtcol);
      }
    }
#endif

#if defined(FEAT_CSCOPE) && defined(FEAT_QUICKFIX)
    else if (varp == &p_csqf)
    {
      if (p_csqf != NULL)
      {
          p = p_csqf;
          while (*p != NUL)
          {
            if (vim_strchr((char_u *)CSQF_CMDS, *p) == NULL
                  || p[1] == NUL
                  || vim_strchr((char_u *)CSQF_FLAGS, p[1]) == NULL
                  || (p[2] != NUL && p[2] != ','))
            {
                errmsg = e_invarg;
                break;
            }
            else if (p[2] == NUL)
                break;
            else
                p += 3;
          }
      }
    }
#endif

    /* Options that are a list of flags. */
    else
    {
      p = NULL;
      if (varp == &p_ww)
          p = (char_u *)WW_ALL;
      if (varp == &p_shm)
          p = (char_u *)SHM_ALL;
      else if (varp == &(p_cpo))
          p = (char_u *)CPO_ALL;
      else if (varp == &(curbuf->b_p_fo))
          p = (char_u *)FO_ALL;
      else if (varp == &p_mouse)
      {
#ifdef FEAT_MOUSE
          p = (char_u *)MOUSE_ALL;
#else
          if (*p_mouse != NUL)
            errmsg = (char_u *)N_("E538: No mouse support");
#endif
      }
#if defined(FEAT_GUI)
      else if (varp == &p_go)
          p = (char_u *)GO_ALL;
#endif
      if (p != NULL)
      {
          for (s = *varp; *s; ++s)
            if (vim_strchr(p, *s) == NULL)
            {
                errmsg = illegal_char(errbuf, *s);
                break;
            }
      }
    }

    /*
     * If error detected, restore the previous value.
     */
    if (errmsg != NULL)
    {
      if (new_value_alloced)
          free_string_option(*varp);
      *varp = oldval;
      /*
       * When resetting some values, need to act on it.
       */
      if (did_chartab)
          (void)init_chartab();
      if (varp == &p_hl)
          (void)highlight_changed();
    }
    else
    {
#ifdef FEAT_EVAL
      /* Remember where the option was set. */
      set_option_scriptID_idx(opt_idx, opt_flags, current_SID);
#endif
      /*
       * Free string options that are in allocated memory.
       * Use "free_oldval", because recursiveness may change the flags under
       * our fingers (esp. init_highlight()).
       */
      if (free_oldval)
          free_string_option(oldval);
      if (new_value_alloced)
          options[opt_idx].flags |= P_ALLOCED;
      else
          options[opt_idx].flags &= ~P_ALLOCED;

      if ((opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0
            && ((int)options[opt_idx].indir & PV_BOTH))
      {
          /* global option with local value set to use global value; free
           * the local value and make it empty */
          p = get_varp_scope(&(options[opt_idx]), OPT_LOCAL);
          free_string_option(*(char_u **)p);
          *(char_u **)p = empty_option;
      }

      /* May set global value for local option. */
      else if (!(opt_flags & OPT_LOCAL) && opt_flags != OPT_GLOBAL)
          set_string_option_global(opt_idx, varp);

#ifdef FEAT_AUTOCMD
      /*
       * Trigger the autocommand only after setting the flags.
       */
# ifdef FEAT_SYN_HL
      /* When 'syntax' is set, load the syntax of that name */
      if (varp == &(curbuf->b_p_syn))
      {
          apply_autocmds(EVENT_SYNTAX, curbuf->b_p_syn,
                                     curbuf->b_fname, TRUE, curbuf);
      }
# endif
      else if (varp == &(curbuf->b_p_ft))
      {
          /* 'filetype' is set, trigger the FileType autocommand */
          did_filetype = TRUE;
          apply_autocmds(EVENT_FILETYPE, curbuf->b_p_ft,
                                     curbuf->b_fname, TRUE, curbuf);
      }
#endif
#ifdef FEAT_SPELL
      if (varp == &(curbuf->b_p_spl))
      {
          char_u  fname[200];

          /*
           * Source the spell/LANG.vim in 'runtimepath'.
           * They could set 'spellcapcheck' depending on the language.
           * Use the first name in 'spelllang' up to '_region' or
           * '.encoding'.
           */
          for (p = curbuf->b_p_spl; *p != NUL; ++p)
            if (vim_strchr((char_u *)"_.,", *p) != NULL)
                break;
          vim_snprintf((char *)fname, 200, "spell/%.*s.vim",
                         (int)(p - curbuf->b_p_spl), curbuf->b_p_spl);
          source_runtime(fname, TRUE);
      }
#endif
    }

#ifdef FEAT_MOUSE
    if (varp == &p_mouse)
    {
# ifdef FEAT_MOUSE_TTY
      if (*p_mouse == NUL)
          mch_setmouse(FALSE);    /* switch mouse off */
      else
# endif
          setmouse();             /* in case 'mouse' changed */
    }
#endif

    if (curwin->w_curswant != MAXCOL)
      curwin->w_set_curswant = TRUE;  /* in case 'showbreak' changed */
#ifdef FEAT_GUI
    /* check redraw when it's not a GUI option or the GUI is active. */
    if (!redraw_gui_only || gui.in_use)
#endif
      check_redraw(options[opt_idx].flags);

    return errmsg;
}

/*
 * Handle setting 'listchars' or 'fillchars'.
 * Returns error message, NULL if it's OK.
 */
    static char_u *
set_chars_option(varp)
    char_u  **varp;
{
    int           round, i, len, entries;
    char_u  *p, *s;
    int           c1, c2 = 0;
    struct charstab
    {
      int   *cp;
      char  *name;
    };
#if defined(FEAT_WINDOWS) || defined(FEAT_FOLDING)
    static struct charstab filltab[] =
    {
      {&fill_stl, "stl"},
      {&fill_stlnc,     "stlnc"},
      {&fill_vert,      "vert"},
      {&fill_fold,      "fold"},
      {&fill_diff,      "diff"},
    };
#endif
    static struct charstab lcstab[] =
    {
      {&lcs_eol,  "eol"},
      {&lcs_ext,  "extends"},
      {&lcs_nbsp, "nbsp"},
      {&lcs_prec, "precedes"},
      {&lcs_tab2, "tab"},
      {&lcs_trail,      "trail"},
    };
    struct charstab *tab;

#if defined(FEAT_WINDOWS) || defined(FEAT_FOLDING)
    if (varp == &p_lcs)
#endif
    {
      tab = lcstab;
      entries = sizeof(lcstab) / sizeof(struct charstab);
    }
#if defined(FEAT_WINDOWS) || defined(FEAT_FOLDING)
    else
    {
      tab = filltab;
      entries = sizeof(filltab) / sizeof(struct charstab);
    }
#endif

    /* first round: check for valid value, second round: assign values */
    for (round = 0; round <= 1; ++round)
    {
      if (round)
      {
          /* After checking that the value is valid: set defaults: space for
           * 'fillchars', NUL for 'listchars' */
          for (i = 0; i < entries; ++i)
            *(tab[i].cp) = (varp == &p_lcs ? NUL : ' ');
          if (varp == &p_lcs)
            lcs_tab1 = NUL;
#if defined(FEAT_WINDOWS) || defined(FEAT_FOLDING)
          else
            fill_diff = '-';
#endif
      }
      p = *varp;
      while (*p)
      {
          for (i = 0; i < entries; ++i)
          {
            len = (int)STRLEN(tab[i].name);
            if (STRNCMP(p, tab[i].name, len) == 0
                  && p[len] == ':'
                  && p[len + 1] != NUL)
            {
                s = p + len + 1;
#ifdef FEAT_MBYTE
                c1 = mb_ptr2char_adv(&s);
                if (mb_char2cells(c1) > 1)
                  continue;
#else
                c1 = *s++;
#endif
                if (tab[i].cp == &lcs_tab2)
                {
                  if (*s == NUL)
                      continue;
#ifdef FEAT_MBYTE
                  c2 = mb_ptr2char_adv(&s);
                  if (mb_char2cells(c2) > 1)
                      continue;
#else
                  c2 = *s++;
#endif
                }
                if (*s == ',' || *s == NUL)
                {
                  if (round)
                  {
                      if (tab[i].cp == &lcs_tab2)
                      {
                        lcs_tab1 = c1;
                        lcs_tab2 = c2;
                      }
                      else
                        *(tab[i].cp) = c1;

                  }
                  p = s;
                  break;
                }
            }
          }

          if (i == entries)
            return e_invarg;
          if (*p == ',')
            ++p;
      }
    }

    return NULL;  /* no error */
}

#ifdef FEAT_STL_OPT
/*
 * Check validity of options with the 'statusline' format.
 * Return error message or NULL.
 */
    char_u *
check_stl_option(s)
    char_u  *s;
{
    int           itemcnt = 0;
    int           groupdepth = 0;
    static char_u   errbuf[80];

    while (*s && itemcnt < STL_MAX_ITEM)
    {
      /* Check for valid keys after % sequences */
      while (*s && *s != '%')
          s++;
      if (!*s)
          break;
      s++;
      if (*s != '%' && *s != ')')
          ++itemcnt;
      if (*s == '%' || *s == STL_TRUNCMARK || *s == STL_MIDDLEMARK)
      {
          s++;
          continue;
      }
      if (*s == ')')
      {
          s++;
          if (--groupdepth < 0)
            break;
          continue;
      }
      if (*s == '-')
          s++;
      while (VIM_ISDIGIT(*s))
          s++;
      if (*s == STL_USER_HL)
          continue;
      if (*s == '.')
      {
          s++;
          while (*s && VIM_ISDIGIT(*s))
            s++;
      }
      if (*s == '(')
      {
          groupdepth++;
          continue;
      }
      if (vim_strchr(STL_ALL, *s) == NULL)
      {
          return illegal_char(errbuf, *s);
      }
      if (*s == '{')
      {
          s++;
          while (*s != '}' && *s)
            s++;
          if (*s != '}')
            return (char_u *)N_("E540: Unclosed expression sequence");
      }
    }
    if (itemcnt >= STL_MAX_ITEM)
      return (char_u *)N_("E541: too many items");
    if (groupdepth != 0)
      return (char_u *)N_("E542: unbalanced groups");
    return NULL;
}
#endif

#ifdef FEAT_CLIPBOARD
/*
 * Extract the items in the 'clipboard' option and set global values.
 */
    static char_u *
check_clipboard_option()
{
    int           new_unnamed = FALSE;
    int           new_autoselect = FALSE;
    int           new_autoselectml = FALSE;
    int           new_html = FALSE;
    regprog_T     *new_exclude_prog = NULL;
    char_u  *errmsg = NULL;
    char_u  *p;

    for (p = p_cb; *p != NUL; )
    {
      if (STRNCMP(p, "unnamed", 7) == 0 && (p[7] == ',' || p[7] == NUL))
      {
          new_unnamed = TRUE;
          p += 7;
      }
      else if (STRNCMP(p, "autoselect", 10) == 0
                              && (p[10] == ',' || p[10] == NUL))
      {
          new_autoselect = TRUE;
          p += 10;
      }
      else if (STRNCMP(p, "autoselectml", 12) == 0
                              && (p[12] == ',' || p[12] == NUL))
      {
          new_autoselectml = TRUE;
          p += 12;
      }
      else if (STRNCMP(p, "html", 4) == 0 && (p[4] == ',' || p[4] == NUL))
      {
          new_html = TRUE;
          p += 4;
      }
      else if (STRNCMP(p, "exclude:", 8) == 0 && new_exclude_prog == NULL)
      {
          p += 8;
          new_exclude_prog = vim_regcomp(p, RE_MAGIC);
          if (new_exclude_prog == NULL)
            errmsg = e_invarg;
          break;
      }
      else
      {
          errmsg = e_invarg;
          break;
      }
      if (*p == ',')
          ++p;
    }
    if (errmsg == NULL)
    {
      clip_unnamed = new_unnamed;
      clip_autoselect = new_autoselect;
      clip_autoselectml = new_autoselectml;
      clip_html = new_html;
      vim_free(clip_exclude_prog);
      clip_exclude_prog = new_exclude_prog;
    }
    else
      vim_free(new_exclude_prog);

    return errmsg;
}
#endif

#ifdef FEAT_SPELL
/*
 * Set curbuf->b_cap_prog to the regexp program for 'spellcapcheck'.
 * Return error message when failed, NULL when OK.
 */
    static char_u *
compile_cap_prog(buf)
    buf_T   *buf;
{
    regprog_T   *rp = buf->b_cap_prog;
    char_u  *re;

    if (*buf->b_p_spc == NUL)
      buf->b_cap_prog = NULL;
    else
    {
      /* Prepend a ^ so that we only match at one column */
      re = concat_str((char_u *)"^", buf->b_p_spc);
      if (re != NULL)
      {
          buf->b_cap_prog = vim_regcomp(re, RE_MAGIC);
          if (buf->b_cap_prog == NULL)
          {
            buf->b_cap_prog = rp; /* restore the previous program */
            return e_invarg;
          }
          vim_free(re);
      }
    }

    vim_free(rp);
    return NULL;
}
#endif

#if defined(FEAT_EVAL) || defined(PROTO)
/*
 * Set the scriptID for an option, taking care of setting the buffer- or
 * window-local value.
 */
    static void
set_option_scriptID_idx(opt_idx, opt_flags, id)
    int         opt_idx;
    int         opt_flags;
    int         id;
{
    int           both = (opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0;
    int           indir = (int)options[opt_idx].indir;

    /* Remember where the option was set.  For local options need to do that
     * in the buffer or window structure. */
    if (both || (opt_flags & OPT_GLOBAL) || (indir & (PV_BUF|PV_WIN)) == 0)
      options[opt_idx].scriptID = id;
    if (both || (opt_flags & OPT_LOCAL))
    {
      if (indir & PV_BUF)
          curbuf->b_p_scriptID[indir & PV_MASK] = id;
      else if (indir & PV_WIN)
          curwin->w_p_scriptID[indir & PV_MASK] = id;
    }
}
#endif

/*
 * Set the value of a boolean option, and take care of side effects.
 * Returns NULL for success, or an error message for an error.
 */
    static char_u *
set_bool_option(opt_idx, varp, value, opt_flags)
    int           opt_idx;          /* index in options[] table */
    char_u  *varp;                  /* pointer to the option variable */
    int           value;                  /* new value */
    int           opt_flags;        /* OPT_LOCAL and/or OPT_GLOBAL */
{
    int           old_value = *(int *)varp;

    /* Disallow changing some options from secure mode */
    if ((secure
#ifdef HAVE_SANDBOX
            || sandbox != 0
#endif
            ) && (options[opt_idx].flags & P_SECURE))
      return e_secure;

    *(int *)varp = value;         /* set the new value */
#ifdef FEAT_EVAL
    /* Remember where the option was set. */
    set_option_scriptID_idx(opt_idx, opt_flags, current_SID);
#endif

#ifdef FEAT_GUI
    need_mouse_correct = TRUE;
#endif

    /* May set global value for local option. */
    if ((opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0)
      *(int *)get_varp_scope(&(options[opt_idx]), OPT_GLOBAL) = value;

    /*
     * Handle side effects of changing a bool option.
     */

    /* 'compatible' */
    if ((int *)varp == &p_cp)
    {
      compatible_set();
    }

    /* 'list', 'number' */
    else if ((int *)varp == &curwin->w_p_list
        || (int *)varp == &curwin->w_p_nu)
    {
      if (curwin->w_curswant != MAXCOL)
          curwin->w_set_curswant = TRUE;
    }

    else if ((int *)varp == &curbuf->b_p_ro)
    {
      /* when 'readonly' is reset globally, also reset readonlymode */
      if (!curbuf->b_p_ro && (opt_flags & OPT_LOCAL) == 0)
          readonlymode = FALSE;

      /* when 'readonly' is set may give W10 again */
      if (curbuf->b_p_ro)
          curbuf->b_did_warn = FALSE;

#ifdef FEAT_TITLE
      redraw_titles();
#endif
    }

#ifdef FEAT_TITLE
    /* when 'modifiable' is changed, redraw the window title */
    else if ((int *)varp == &curbuf->b_p_ma)
    {
      redraw_titles();
    }
    /* when 'endofline' is changed, redraw the window title */
    else if ((int *)varp == &curbuf->b_p_eol)
    {
      redraw_titles();
    }
# ifdef FEAT_MBYTE
    /* when 'bomb' is changed, redraw the window title and tab page text */
    else if ((int *)varp == &curbuf->b_p_bomb)
    {
      redraw_titles();
    }
# endif
#endif

    /* when 'bin' is set also set some other options */
    else if ((int *)varp == &curbuf->b_p_bin)
    {
      set_options_bin(old_value, curbuf->b_p_bin, opt_flags);
#ifdef FEAT_TITLE
      redraw_titles();
#endif
    }

#ifdef FEAT_AUTOCMD
    /* when 'buflisted' changes, trigger autocommands */
    else if ((int *)varp == &curbuf->b_p_bl && old_value != curbuf->b_p_bl)
    {
      apply_autocmds(curbuf->b_p_bl ? EVENT_BUFADD : EVENT_BUFDELETE,
                                        NULL, NULL, TRUE, curbuf);
    }
#endif

    /* when 'swf' is set, create swapfile, when reset remove swapfile */
    else if ((int *)varp == &curbuf->b_p_swf)
    {
      if (curbuf->b_p_swf && p_uc)
          ml_open_file(curbuf);           /* create the swap file */
      else
          /* no need to reset curbuf->b_may_swap, ml_open_file() will check
           * buf->b_p_swf */
          mf_close_file(curbuf, TRUE);    /* remove the swap file */
    }

    /* when 'terse' is set change 'shortmess' */
    else if ((int *)varp == &p_terse)
    {
      char_u      *p;

      p = vim_strchr(p_shm, SHM_SEARCH);

      /* insert 's' in p_shm */
      if (p_terse && p == NULL)
      {
          STRCPY(IObuff, p_shm);
          STRCAT(IObuff, "s");
          set_string_option_direct((char_u *)"shm", -1, IObuff, OPT_FREE, 0);
      }
      /* remove 's' from p_shm */
      else if (!p_terse && p != NULL)
          STRMOVE(p, p + 1);
    }

    /* when 'paste' is set or reset also change other options */
    else if ((int *)varp == &p_paste)
    {
      paste_option_changed();
    }

    /* when 'insertmode' is set from an autocommand need to do work here */
    else if ((int *)varp == &p_im)
    {
      if (p_im)
      {
          if ((State & INSERT) == 0)
            need_start_insertmode = TRUE;
          stop_insert_mode = FALSE;
      }
      else
      {
          need_start_insertmode = FALSE;
          stop_insert_mode = TRUE;
          if (restart_edit != 0 && mode_displayed)
            clear_cmdline = TRUE;   /* remove "(insert)" */
          restart_edit = 0;
      }
    }

    /* when 'ignorecase' is set or reset and 'hlsearch' is set, redraw */
    else if ((int *)varp == &p_ic && p_hls)
    {
      redraw_all_later(SOME_VALID);
    }

#ifdef FEAT_SEARCH_EXTRA
    /* when 'hlsearch' is set or reset: reset no_hlsearch */
    else if ((int *)varp == &p_hls)
    {
      no_hlsearch = FALSE;
    }
#endif

#ifdef FEAT_SCROLLBIND
    /* when 'scrollbind' is set: snapshot the current position to avoid a jump
     * at the end of normal_cmd() */
    else if ((int *)varp == &curwin->w_p_scb)
    {
      if (curwin->w_p_scb)
          do_check_scrollbind(FALSE);
    }
#endif

#if defined(FEAT_WINDOWS) && defined(FEAT_QUICKFIX)
    /* There can be only one window with 'previewwindow' set. */
    else if ((int *)varp == &curwin->w_p_pvw)
    {
      if (curwin->w_p_pvw)
      {
          win_T   *win;

          for (win = firstwin; win != NULL; win = win->w_next)
            if (win->w_p_pvw && win != curwin)
            {
                curwin->w_p_pvw = FALSE;
                return (char_u *)N_("E590: A preview window already exists");
            }
      }
    }
#endif

    /* when 'textmode' is set or reset also change 'fileformat' */
    else if ((int *)varp == &curbuf->b_p_tx)
    {
      set_fileformat(curbuf->b_p_tx ? EOL_DOS : EOL_UNIX, opt_flags);
    }

    /* when 'textauto' is set or reset also change 'fileformats' */
    else if ((int *)varp == &p_ta)
      set_string_option_direct((char_u *)"ffs", -1,
                         p_ta ? (char_u *)DFLT_FFS_VIM : (char_u *)"",
                                         OPT_FREE | opt_flags, 0);

    /*
     * When 'lisp' option changes include/exclude '-' in
     * keyword characters.
     */
#ifdef FEAT_LISP
    else if (varp == (char_u *)&(curbuf->b_p_lisp))
    {
      (void)buf_init_chartab(curbuf, FALSE);        /* ignore errors */
    }
#endif

#ifdef FEAT_TITLE
    /* when 'title' changed, may need to change the title; same for 'icon' */
    else if ((int *)varp == &p_title)
    {
      did_set_title(FALSE);
    }

    else if ((int *)varp == &p_icon)
    {
      did_set_title(TRUE);
    }
#endif

    else if ((int *)varp == &curbuf->b_changed)
    {
      if (!value)
          save_file_ff(curbuf);     /* Buffer is unchanged */
#ifdef FEAT_TITLE
      redraw_titles();
#endif
#ifdef FEAT_AUTOCMD
      modified_was_set = value;
#endif
    }

#ifdef BACKSLASH_IN_FILENAME
    else if ((int *)varp == &p_ssl)
    {
      if (p_ssl)
      {
          psepc = '/';
          psepcN = '\\';
          pseps[0] = '/';
      }
      else
      {
          psepc = '\\';
          psepcN = '/';
          pseps[0] = '\\';
      }

      /* need to adjust the file name arguments and buffer names. */
      buflist_slash_adjust();
      alist_slash_adjust();
# ifdef FEAT_EVAL
      scriptnames_slash_adjust();
# endif
    }
#endif

    /* If 'wrap' is set, set w_leftcol to zero. */
    else if ((int *)varp == &curwin->w_p_wrap)
    {
      if (curwin->w_p_wrap)
          curwin->w_leftcol = 0;
    }

#ifdef FEAT_WINDOWS
    else if ((int *)varp == &p_ea)
    {
      if (p_ea && !old_value)
          win_equal(curwin, FALSE, 0);
    }
#endif

    else if ((int *)varp == &p_wiv)
    {
      /*
       * When 'weirdinvert' changed, set/reset 't_xs'.
       * Then set 'weirdinvert' according to value of 't_xs'.
       */
      if (p_wiv && !old_value)
          T_XS = (char_u *)"y";
      else if (!p_wiv && old_value)
          T_XS = empty_option;
      p_wiv = (*T_XS != NUL);
    }

#ifdef FEAT_BEVAL
    else if ((int *)varp == &p_beval)
    {
      if (p_beval == TRUE)
          gui_mch_enable_beval_area(balloonEval);
      else
          gui_mch_disable_beval_area(balloonEval);
    }
#endif

#ifdef FEAT_AUTOCHDIR
    else if ((int *)varp == &p_acd)
    {
      /* Change directories when the 'acd' option is set now. */
      DO_AUTOCHDIR
    }
#endif

#ifdef FEAT_DIFF
    /* 'diff' */
    else if ((int *)varp == &curwin->w_p_diff)
    {
      /* May add or remove the buffer from the list of diff buffers. */
      diff_buf_adjust(curwin);
# ifdef FEAT_FOLDING
      if (foldmethodIsDiff(curwin))
          foldUpdateAll(curwin);
# endif
    }
#endif

#ifdef USE_IM_CONTROL
    /* 'imdisable' */
    else if ((int *)varp == &p_imdisable)
    {
      /* Only de-activate it here, it will be enabled when changing mode. */
      if (p_imdisable)
          im_set_active(FALSE);
    }
#endif

#ifdef FEAT_SPELL
    /* 'spell' */
    else if ((int *)varp == &curwin->w_p_spell)
    {
      if (curwin->w_p_spell)
      {
          char_u  *errmsg = did_set_spelllang(curbuf);

          if (errmsg != NULL)
            EMSG(_(errmsg));
      }
    }
#endif

#ifdef FEAT_FKMAP
    else if ((int *)varp == &p_altkeymap)
    {
      if (old_value != p_altkeymap)
      {
          if (!p_altkeymap)
          {
            p_hkmap = p_fkmap;
            p_fkmap = 0;
          }
          else
          {
            p_fkmap = p_hkmap;
            p_hkmap = 0;
          }
          (void)init_chartab();
      }
    }

    /*
     * In case some second language keymapping options have changed, check
     * and correct the setting in a consistent way.
     */

    /*
     * If hkmap or fkmap are set, reset Arabic keymapping.
     */
    if ((p_hkmap || p_fkmap) && p_altkeymap)
    {
      p_altkeymap = p_fkmap;
# ifdef FEAT_ARABIC
      curwin->w_p_arab = FALSE;
# endif
      (void)init_chartab();
    }

    /*
     * If hkmap set, reset Farsi keymapping.
     */
    if (p_hkmap && p_altkeymap)
    {
      p_altkeymap = 0;
      p_fkmap = 0;
# ifdef FEAT_ARABIC
      curwin->w_p_arab = FALSE;
# endif
      (void)init_chartab();
    }

    /*
     * If fkmap set, reset Hebrew keymapping.
     */
    if (p_fkmap && !p_altkeymap)
    {
      p_altkeymap = 1;
      p_hkmap = 0;
# ifdef FEAT_ARABIC
      curwin->w_p_arab = FALSE;
# endif
      (void)init_chartab();
    }
#endif

#ifdef FEAT_ARABIC
    if ((int *)varp == &curwin->w_p_arab)
    {
      if (curwin->w_p_arab)
      {
          /*
           * 'arabic' is set, handle various sub-settings.
           */
          if (!p_tbidi)
          {
            /* set rightleft mode */
            if (!curwin->w_p_rl)
            {
                curwin->w_p_rl = TRUE;
                changed_window_setting();
            }

            /* Enable Arabic shaping (major part of what Arabic requires) */
            if (!p_arshape)
            {
                p_arshape = TRUE;
                redraw_later_clear();
            }
          }

          /* Arabic requires a utf-8 encoding, inform the user if its not
           * set. */
          if (STRCMP(p_enc, "utf-8") != 0)
          {
            static char *w_arabic = N_("W17: Arabic requires UTF-8, do ':set encoding=utf-8'");

            msg_source(hl_attr(HLF_W));
            MSG_ATTR(_(w_arabic), hl_attr(HLF_W));
#ifdef FEAT_EVAL
            set_vim_var_string(VV_WARNINGMSG, (char_u *)_(w_arabic), -1);
#endif
          }

# ifdef FEAT_MBYTE
          /* set 'delcombine' */
          p_deco = TRUE;
# endif

# ifdef FEAT_KEYMAP
          /* Force-set the necessary keymap for arabic */
          set_option_value((char_u *)"keymap", 0L, (char_u *)"arabic",
                                                   OPT_LOCAL);
# endif
# ifdef FEAT_FKMAP
          p_altkeymap = 0;
          p_hkmap = 0;
          p_fkmap = 0;
          (void)init_chartab();
# endif
      }
      else
      {
          /*
           * 'arabic' is reset, handle various sub-settings.
           */
          if (!p_tbidi)
          {
            /* reset rightleft mode */
            if (curwin->w_p_rl)
            {
                curwin->w_p_rl = FALSE;
                changed_window_setting();
            }

            /* 'arabicshape' isn't reset, it is a global option and
             * another window may still need it "on". */
          }

          /* 'delcombine' isn't reset, it is a global option and another
           * window may still want it "on". */

# ifdef FEAT_KEYMAP
          /* Revert to the default keymap */
          curbuf->b_p_iminsert = B_IMODE_NONE;
          curbuf->b_p_imsearch = B_IMODE_USE_INSERT;
# endif
      }
      if (curwin->w_curswant != MAXCOL)
          curwin->w_set_curswant = TRUE;
    }

    else if ((int *)varp == &p_arshape)
    {
      if (curwin->w_curswant != MAXCOL)
          curwin->w_set_curswant = TRUE;
    }
#endif

    /*
     * End of handling side effects for bool options.
     */

    options[opt_idx].flags |= P_WAS_SET;

    comp_col();                   /* in case 'ruler' or 'showcmd' changed */

    check_redraw(options[opt_idx].flags);

    return NULL;
}

/*
 * Set the value of a number option, and take care of side effects.
 * Returns NULL for success, or an error message for an error.
 */
    static char_u *
set_num_option(opt_idx, varp, value, errbuf, errbuflen, opt_flags)
    int           opt_idx;          /* index in options[] table */
    char_u  *varp;                  /* pointer to the option variable */
    long    value;                  /* new value */
    char_u  *errbuf;          /* buffer for error messages */
    size_t  errbuflen;        /* length of "errbuf" */
    int           opt_flags;        /* OPT_LOCAL, OPT_GLOBAL and
                                 OPT_MODELINE */
{
    char_u  *errmsg = NULL;
    long    old_value = *(long *)varp;
    long    old_Rows = Rows;  /* remember old Rows */
    long    old_Columns = Columns;  /* remember old Columns */
    long    *pp = (long *)varp;

    /* Disallow changing some options from secure mode. */
    if ((secure
#ifdef HAVE_SANDBOX
            || sandbox != 0
#endif
            ) && (options[opt_idx].flags & P_SECURE))
      return e_secure;

    *pp = value;
#ifdef FEAT_EVAL
    /* Remember where the option was set. */
    set_option_scriptID_idx(opt_idx, opt_flags, current_SID);
#endif
#ifdef FEAT_GUI
    need_mouse_correct = TRUE;
#endif

    if (curbuf->b_p_sw <= 0)
    {
      errmsg = e_positive;
      curbuf->b_p_sw = curbuf->b_p_ts;
    }

    /*
     * Number options that need some action when changed
     */
#ifdef FEAT_WINDOWS
    if (pp == &p_wh || pp == &p_hh)
    {
      if (p_wh < 1)
      {
          errmsg = e_positive;
          p_wh = 1;
      }
      if (p_wmh > p_wh)
      {
          errmsg = e_winheight;
          p_wh = p_wmh;
      }
      if (p_hh < 0)
      {
          errmsg = e_positive;
          p_hh = 0;
      }

      /* Change window height NOW */
      if (lastwin != firstwin)
      {
          if (pp == &p_wh && curwin->w_height < p_wh)
            win_setheight((int)p_wh);
          if (pp == &p_hh && curbuf->b_help && curwin->w_height < p_hh)
            win_setheight((int)p_hh);
      }
    }

    /* 'winminheight' */
    else if (pp == &p_wmh)
    {
      if (p_wmh < 0)
      {
          errmsg = e_positive;
          p_wmh = 0;
      }
      if (p_wmh > p_wh)
      {
          errmsg = e_winheight;
          p_wmh = p_wh;
      }
      win_setminheight();
    }

# ifdef FEAT_VERTSPLIT
    else if (pp == &p_wiw)
    {
      if (p_wiw < 1)
      {
          errmsg = e_positive;
          p_wiw = 1;
      }
      if (p_wmw > p_wiw)
      {
          errmsg = e_winwidth;
          p_wiw = p_wmw;
      }

      /* Change window width NOW */
      if (lastwin != firstwin && curwin->w_width < p_wiw)
          win_setwidth((int)p_wiw);
    }

    /* 'winminwidth' */
    else if (pp == &p_wmw)
    {
      if (p_wmw < 0)
      {
          errmsg = e_positive;
          p_wmw = 0;
      }
      if (p_wmw > p_wiw)
      {
          errmsg = e_winwidth;
          p_wmw = p_wiw;
      }
      win_setminheight();
    }
# endif

#endif

#ifdef FEAT_WINDOWS
    /* (re)set last window status line */
    else if (pp == &p_ls)
    {
      last_status(FALSE);
    }

    /* (re)set tab page line */
    else if (pp == &p_stal)
    {
      shell_new_rows(); /* recompute window positions and heights */
    }
#endif

#ifdef FEAT_GUI
    else if (pp == &p_linespace)
    {
      /* Recompute gui.char_height and resize the Vim window to keep the
       * same number of lines. */
      if (gui.in_use && gui_mch_adjust_charheight() == OK)
          gui_set_shellsize(FALSE, FALSE, RESIZE_VERT);
    }
#endif

#ifdef FEAT_FOLDING
    /* 'foldlevel' */
    else if (pp == &curwin->w_p_fdl)
    {
      if (curwin->w_p_fdl < 0)
          curwin->w_p_fdl = 0;
      newFoldLevel();
    }

    /* 'foldminlines' */
    else if (pp == &curwin->w_p_fml)
    {
      foldUpdateAll(curwin);
    }

    /* 'foldnestmax' */
    else if (pp == &curwin->w_p_fdn)
    {
      if (foldmethodIsSyntax(curwin) || foldmethodIsIndent(curwin))
          foldUpdateAll(curwin);
    }

    /* 'foldcolumn' */
    else if (pp == &curwin->w_p_fdc)
    {
      if (curwin->w_p_fdc < 0)
      {
          errmsg = e_positive;
          curwin->w_p_fdc = 0;
      }
      else if (curwin->w_p_fdc > 12)
      {
          errmsg = e_invarg;
          curwin->w_p_fdc = 12;
      }
    }

    /* 'shiftwidth' or 'tabstop' */
    else if (pp == &curbuf->b_p_sw || pp == &curbuf->b_p_ts)
    {
      if (foldmethodIsIndent(curwin))
          foldUpdateAll(curwin);
    }
#endif /* FEAT_FOLDING */

#ifdef FEAT_MBYTE
    /* 'maxcombine' */
    else if (pp == &p_mco)
    {
      if (p_mco > MAX_MCO)
          p_mco = MAX_MCO;
      else if (p_mco < 0)
          p_mco = 0;
      screenclear();        /* will re-allocate the screen */
    }
#endif

    else if (pp == &curbuf->b_p_iminsert)
    {
      if (curbuf->b_p_iminsert < 0 || curbuf->b_p_iminsert > B_IMODE_LAST)
      {
          errmsg = e_invarg;
          curbuf->b_p_iminsert = B_IMODE_NONE;
      }
      p_iminsert = curbuf->b_p_iminsert;
      if (termcap_active)     /* don't do this in the alternate screen */
          showmode();
#if defined(FEAT_WINDOWS) && defined(FEAT_KEYMAP)
      /* Show/unshow value of 'keymap' in status lines. */
      status_redraw_curbuf();
#endif
    }

    else if (pp == &p_window)
    {
      if (p_window < 1)
          p_window = 1;
      else if (p_window >= Rows)
          p_window = Rows - 1;
    }

    else if (pp == &curbuf->b_p_imsearch)
    {
      if (curbuf->b_p_imsearch < -1 || curbuf->b_p_imsearch > B_IMODE_LAST)
      {
          errmsg = e_invarg;
          curbuf->b_p_imsearch = B_IMODE_NONE;
      }
      p_imsearch = curbuf->b_p_imsearch;
    }

#ifdef FEAT_TITLE
    /* if 'titlelen' has changed, redraw the title */
    else if (pp == &p_titlelen)
    {
      if (p_titlelen < 0)
      {
          errmsg = e_positive;
          p_titlelen = 85;
      }
      if (starting != NO_SCREEN && old_value != p_titlelen)
          need_maketitle = TRUE;
    }
#endif

    /* if p_ch changed value, change the command line height */
    else if (pp == &p_ch)
    {
      if (p_ch < 1)
      {
          errmsg = e_positive;
          p_ch = 1;
      }
      if (p_ch > Rows - min_rows() + 1)
          p_ch = Rows - min_rows() + 1;

      /* Only compute the new window layout when startup has been
       * completed. Otherwise the frame sizes may be wrong. */
      if (p_ch != old_value && full_screen
#ifdef FEAT_GUI
            && !gui.starting
#endif
         )
          command_height();
    }

    /* when 'updatecount' changes from zero to non-zero, open swap files */
    else if (pp == &p_uc)
    {
      if (p_uc < 0)
      {
          errmsg = e_positive;
          p_uc = 100;
      }
      if (p_uc && !old_value)
          ml_open_files();
    }
#ifdef MZSCHEME_GUI_THREADS
    else if (pp == &p_mzq)
      mzvim_reset_timer();
#endif

    /* sync undo before 'undolevels' changes */
    else if (pp == &p_ul)
    {
      /* use the old value, otherwise u_sync() may not work properly */
      p_ul = old_value;
      u_sync(TRUE);
      p_ul = value;
    }

#ifdef FEAT_LINEBREAK
    /* 'numberwidth' must be positive */
    else if (pp == &curwin->w_p_nuw)
    {
      if (curwin->w_p_nuw < 1)
      {
          errmsg = e_positive;
          curwin->w_p_nuw = 1;
      }
      if (curwin->w_p_nuw > 10)
      {
          errmsg = e_invarg;
          curwin->w_p_nuw = 10;
      }
      curwin->w_nrwidth_line_count = 0;
    }
#endif

    /*
     * Check the bounds for numeric options here
     */
    if (Rows < min_rows() && full_screen)
    {
      if (errbuf != NULL)
      {
          vim_snprintf((char *)errbuf, errbuflen,
                         _("E593: Need at least %d lines"), min_rows());
          errmsg = errbuf;
      }
      Rows = min_rows();
    }
    if (Columns < MIN_COLUMNS && full_screen)
    {
      if (errbuf != NULL)
      {
          vim_snprintf((char *)errbuf, errbuflen,
                      _("E594: Need at least %d columns"), MIN_COLUMNS);
          errmsg = errbuf;
      }
      Columns = MIN_COLUMNS;
    }
    /* Limit the values to avoid an overflow in Rows * Columns. */
    if (Columns > 10000)
      Columns = 10000;
    if (Rows > 1000)
      Rows = 1000;

#ifdef DJGPP
    /* avoid a crash by checking for a too large value of 'columns' */
    if (old_Columns != Columns && full_screen && term_console)
      mch_check_columns();
#endif

    /*
     * If the screen (shell) height has been changed, assume it is the
     * physical screenheight.
     */
    if (old_Rows != Rows || old_Columns != Columns)
    {
      /* Changing the screen size is not allowed while updating the screen. */
      if (updating_screen)
          *pp = old_value;
      else if (full_screen
#ifdef FEAT_GUI
            && !gui.starting
#endif
          )
          set_shellsize((int)Columns, (int)Rows, TRUE);
      else
      {
          /* Postpone the resizing; check the size and cmdline position for
           * messages. */
          check_shellsize();
          if (cmdline_row > Rows - p_ch && Rows > p_ch)
            cmdline_row = Rows - p_ch;
      }
      if (p_window >= Rows || !option_was_set((char_u *)"window"))
          p_window = Rows - 1;
    }

    if (curbuf->b_p_sts < 0)
    {
      errmsg = e_positive;
      curbuf->b_p_sts = 0;
    }
    if (curbuf->b_p_ts <= 0)
    {
      errmsg = e_positive;
      curbuf->b_p_ts = 8;
    }
    if (curbuf->b_p_tw < 0)
    {
      errmsg = e_positive;
      curbuf->b_p_tw = 0;
    }
    if (p_tm < 0)
    {
      errmsg = e_positive;
      p_tm = 0;
    }
    if ((curwin->w_p_scr <= 0
            || (curwin->w_p_scr > curwin->w_height
                && curwin->w_height > 0))
          && full_screen)
    {
      if (pp == &(curwin->w_p_scr))
      {
          if (curwin->w_p_scr != 0)
            errmsg = e_scroll;
          win_comp_scroll(curwin);
      }
      /* If 'scroll' became invalid because of a side effect silently adjust
       * it. */
      else if (curwin->w_p_scr <= 0)
          curwin->w_p_scr = 1;
      else /* curwin->w_p_scr > curwin->w_height */
          curwin->w_p_scr = curwin->w_height;
    }
    if (p_hi < 0)
    {
      errmsg = e_positive;
      p_hi = 0;
    }
    if (p_report < 0)
    {
      errmsg = e_positive;
      p_report = 1;
    }
    if ((p_sj < -100 || p_sj >= Rows) && full_screen)
    {
      if (Rows != old_Rows)   /* Rows changed, just adjust p_sj */
          p_sj = Rows / 2;
      else
      {
          errmsg = e_scroll;
          p_sj = 1;
      }
    }
    if (p_so < 0 && full_screen)
    {
      errmsg = e_scroll;
      p_so = 0;
    }
    if (p_siso < 0 && full_screen)
    {
      errmsg = e_positive;
      p_siso = 0;
    }
#ifdef FEAT_CMDWIN
    if (p_cwh < 1)
    {
      errmsg = e_positive;
      p_cwh = 1;
    }
#endif
    if (p_ut < 0)
    {
      errmsg = e_positive;
      p_ut = 2000;
    }
    if (p_ss < 0)
    {
      errmsg = e_positive;
      p_ss = 0;
    }

    /* May set global value for local option. */
    if ((opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0)
      *(long *)get_varp_scope(&(options[opt_idx]), OPT_GLOBAL) = *pp;

    options[opt_idx].flags |= P_WAS_SET;

    comp_col();                   /* in case 'columns' or 'ls' changed */
    if (curwin->w_curswant != MAXCOL)
      curwin->w_set_curswant = TRUE;  /* in case 'tabstop' changed */
    check_redraw(options[opt_idx].flags);

    return errmsg;
}

/*
 * Called after an option changed: check if something needs to be redrawn.
 */
    static void
check_redraw(flags)
    long_u  flags;
{
    /* Careful: P_RCLR and P_RALL are a combination of other P_ flags */
    int           clear = (flags & P_RCLR) == P_RCLR;
    int           all = ((flags & P_RALL) == P_RALL || clear);

#ifdef FEAT_WINDOWS
    if ((flags & P_RSTAT) || all)   /* mark all status lines dirty */
      status_redraw_all();
#endif

    if ((flags & P_RBUF) || (flags & P_RWIN) || all)
      changed_window_setting();
    if (flags & P_RBUF)
      redraw_curbuf_later(NOT_VALID);
    if (clear)
      redraw_all_later(CLEAR);
    else if (all)
      redraw_all_later(NOT_VALID);
}

/*
 * Find index for option 'arg'.
 * Return -1 if not found.
 */
    static int
findoption(arg)
    char_u *arg;
{
    int               opt_idx;
    char        *s, *p;
    static short    quick_tab[27] = {0, 0};     /* quick access table */
    int               is_term_opt;

    /*
     * For first call: Initialize the quick-access table.
     * It contains the index for the first option that starts with a certain
     * letter.  There are 26 letters, plus the first "t_" option.
     */
    if (quick_tab[1] == 0)
    {
      p = options[0].fullname;
      for (opt_idx = 1; (s = options[opt_idx].fullname) != NULL; opt_idx++)
      {
          if (s[0] != p[0])
          {
            if (s[0] == 't' && s[1] == '_')
                quick_tab[26] = opt_idx;
            else
                quick_tab[CharOrdLow(s[0])] = opt_idx;
          }
          p = s;
      }
    }

    /*
     * Check for name starting with an illegal character.
     */
#ifdef EBCDIC
    if (!islower(arg[0]))
#else
    if (arg[0] < 'a' || arg[0] > 'z')
#endif
      return -1;

    is_term_opt = (arg[0] == 't' && arg[1] == '_');
    if (is_term_opt)
      opt_idx = quick_tab[26];
    else
      opt_idx = quick_tab[CharOrdLow(arg[0])];
    for ( ; (s = options[opt_idx].fullname) != NULL; opt_idx++)
    {
      if (STRCMP(arg, s) == 0)                /* match full name */
          break;
    }
    if (s == NULL && !is_term_opt)
    {
      opt_idx = quick_tab[CharOrdLow(arg[0])];
      for ( ; options[opt_idx].fullname != NULL; opt_idx++)
      {
          s = options[opt_idx].shortname;
          if (s != NULL && STRCMP(arg, s) == 0)   /* match short name */
            break;
          s = NULL;
      }
    }
    if (s == NULL)
      opt_idx = -1;
    return opt_idx;
}

#if defined(FEAT_EVAL) || defined(FEAT_TCL) || defined(FEAT_MZSCHEME)
/*
 * Get the value for an option.
 *
 * Returns:
 * Number or Toggle option: 1, *numval gets value.
 *         String option: 0, *stringval gets allocated string.
 * Hidden Number or Toggle option: -1.
 *         hidden String option: -2.
 *             unknown option: -3.
 */
    int
get_option_value(name, numval, stringval, opt_flags)
    char_u  *name;
    long    *numval;
    char_u  **stringval;          /* NULL when only checking existance */
    int           opt_flags;
{
    int           opt_idx;
    char_u  *varp;

    opt_idx = findoption(name);
    if (opt_idx < 0)              /* unknown option */
      return -3;

    varp = get_varp_scope(&(options[opt_idx]), opt_flags);

    if (options[opt_idx].flags & P_STRING)
    {
      if (varp == NULL)           /* hidden option */
          return -2;
      if (stringval != NULL)
      {
#ifdef FEAT_CRYPT
          /* never return the value of the crypt key */
          if ((char_u **)varp == &curbuf->b_p_key
                                    && **(char_u **)(varp) != NUL)
            *stringval = vim_strsave((char_u *)"*****");
          else
#endif
            *stringval = vim_strsave(*(char_u **)(varp));
      }
      return 0;
    }

    if (varp == NULL)             /* hidden option */
      return -1;
    if (options[opt_idx].flags & P_NUM)
      *numval = *(long *)varp;
    else
    {
      /* Special case: 'modified' is b_changed, but we also want to consider
       * it set when 'ff' or 'fenc' changed. */
      if ((int *)varp == &curbuf->b_changed)
          *numval = curbufIsChanged();
      else
          *numval = *(int *)varp;
    }
    return 1;
}
#endif

/*
 * Set the value of option "name".
 * Use "string" for string options, use "number" for other options.
 */
    void
set_option_value(name, number, string, opt_flags)
    char_u  *name;
    long    number;
    char_u  *string;
    int           opt_flags;  /* OPT_LOCAL or 0 (both) */
{
    int           opt_idx;
    char_u  *varp;
    long_u  flags;

    opt_idx = findoption(name);
    if (opt_idx < 0)
      EMSG2(_("E355: Unknown option: %s"), name);
    else
    {
      flags = options[opt_idx].flags;
#ifdef HAVE_SANDBOX
      /* Disallow changing some options in the sandbox */
      if (sandbox > 0 && (flags & P_SECURE))
      {
          EMSG(_(e_sandbox));
          return;
      }
#endif
      if (flags & P_STRING)
          set_string_option(opt_idx, string, opt_flags);
      else
      {
          varp = get_varp_scope(&(options[opt_idx]), opt_flags);
          if (varp != NULL)   /* hidden option is not changed */
          {
            if (number == 0 && string != NULL)
            {
                int idx;

                /* Either we are given a string or we are setting option
                 * to zero. */
                for (idx = 0; string[idx] == '0'; ++idx)
                  ;
                if (string[idx] != NUL || idx == 0)
                {
                  /* There's another character after zeros or the string
                   * is empty.  In both cases, we are trying to set a
                   * num option using a string. */
                  EMSG3(_("E521: Number required: &%s = '%s'"),
                                                name, string);
                  return;     /* do nothing as we hit an error */

                }
            }
            if (flags & P_NUM)
                (void)set_num_option(opt_idx, varp, number,
                                            NULL, 0, opt_flags);
            else
                (void)set_bool_option(opt_idx, varp, (int)number,
                                                   opt_flags);
          }
      }
    }
}

/*
 * Get the terminal code for a terminal option.
 * Returns NULL when not found.
 */
    char_u *
get_term_code(tname)
    char_u  *tname;
{
    int         opt_idx;
    char_u  *varp;

    if (tname[0] != 't' || tname[1] != '_' ||
          tname[2] == NUL || tname[3] == NUL)
      return NULL;
    if ((opt_idx = findoption(tname)) >= 0)
    {
      varp = get_varp(&(options[opt_idx]));
      if (varp != NULL)
          varp = *(char_u **)(varp);
      return varp;
    }
    return find_termcode(tname + 2);
}

    char_u *
get_highlight_default()
{
    int i;

    i = findoption((char_u *)"hl");
    if (i >= 0)
      return options[i].def_val[VI_DEFAULT];
    return (char_u *)NULL;
}

#if defined(FEAT_MBYTE) || defined(PROTO)
    char_u *
get_encoding_default()
{
    int i;

    i = findoption((char_u *)"enc");
    if (i >= 0)
      return options[i].def_val[VI_DEFAULT];
    return (char_u *)NULL;
}
#endif

/*
 * Translate a string like "t_xx", "<t_xx>" or "<S-Tab>" to a key number.
 */
    static int
find_key_option(arg)
    char_u *arg;
{
    int           key;
    int           modifiers;

    /*
     * Don't use get_special_key_code() for t_xx, we don't want it to call
     * add_termcap_entry().
     */
    if (arg[0] == 't' && arg[1] == '_' && arg[2] && arg[3])
      key = TERMCAP2KEY(arg[2], arg[3]);
    else
    {
      --arg;                      /* put arg at the '<' */
      modifiers = 0;
      key = find_special_key(&arg, &modifiers, TRUE, TRUE);
      if (modifiers)              /* can't handle modifiers here */
          key = 0;
    }
    return key;
}

/*
 * if 'all' == 0: show changed options
 * if 'all' == 1: show all normal options
 * if 'all' == 2: show all terminal options
 */
    static void
showoptions(all, opt_flags)
    int           all;
    int           opt_flags;  /* OPT_LOCAL and/or OPT_GLOBAL */
{
    struct vimoption    *p;
    int                 col;
    int                 isterm;
    char_u        *varp;
    struct vimoption    **items;
    int                 item_count;
    int                 run;
    int                 row, rows;
    int                 cols;
    int                 i;
    int                 len;

#define INC 20
#define GAP 3

    items = (struct vimoption **)alloc((unsigned)(sizeof(struct vimoption *) *
                                                PARAM_COUNT));
    if (items == NULL)
      return;

    /* Highlight title */
    if (all == 2)
      MSG_PUTS_TITLE(_("\n--- Terminal codes ---"));
    else if (opt_flags & OPT_GLOBAL)
      MSG_PUTS_TITLE(_("\n--- Global option values ---"));
    else if (opt_flags & OPT_LOCAL)
      MSG_PUTS_TITLE(_("\n--- Local option values ---"));
    else
      MSG_PUTS_TITLE(_("\n--- Options ---"));

    /*
     * do the loop two times:
     * 1. display the short items
     * 2. display the long items (only strings and numbers)
     */
    for (run = 1; run <= 2 && !got_int; ++run)
    {
      /*
       * collect the items in items[]
       */
      item_count = 0;
      for (p = &options[0]; p->fullname != NULL; p++)
      {
          varp = NULL;
          isterm = istermoption(p);
          if (opt_flags != 0)
          {
            if (p->indir != PV_NONE && !isterm)
                varp = get_varp_scope(p, opt_flags);
          }
          else
            varp = get_varp(p);
          if (varp != NULL
                && ((all == 2 && isterm)
                  || (all == 1 && !isterm)
                  || (all == 0 && !optval_default(p, varp))))
          {
            if (p->flags & P_BOOL)
                len = 1;            /* a toggle option fits always */
            else
            {
                option_value2string(p, opt_flags);
                len = (int)STRLEN(p->fullname) + vim_strsize(NameBuff) + 1;
            }
            if ((len <= INC - GAP && run == 1) ||
                                    (len > INC - GAP && run == 2))
                items[item_count++] = p;
          }
      }

      /*
       * display the items
       */
      if (run == 1)
      {
          cols = (Columns + GAP - 3) / INC;
          if (cols == 0)
            cols = 1;
          rows = (item_count + cols - 1) / cols;
      }
      else  /* run == 2 */
          rows = item_count;
      for (row = 0; row < rows && !got_int; ++row)
      {
          msg_putchar('\n');              /* go to next line */
          if (got_int)              /* 'q' typed in more */
            break;
          col = 0;
          for (i = row; i < item_count; i += rows)
          {
            msg_col = col;                /* make columns */
            showoneopt(items[i], opt_flags);
            col += INC;
          }
          out_flush();
          ui_breakcheck();
      }
    }
    vim_free(items);
}

/*
 * Return TRUE if option "p" has its default value.
 */
    static int
optval_default(p, varp)
    struct vimoption    *p;
    char_u        *varp;
{
    int           dvi;

    if (varp == NULL)
      return TRUE;          /* hidden option is always at default */
    dvi = ((p->flags & P_VI_DEF) || p_cp) ? VI_DEFAULT : VIM_DEFAULT;
    if (p->flags & P_NUM)
      return (*(long *)varp == (long)(long_i)p->def_val[dvi]);
    if (p->flags & P_BOOL)
                  /* the cast to long is required for Manx C, long_i is
                   * needed for MSVC */
      return (*(int *)varp == (int)(long)(long_i)p->def_val[dvi]);
    /* P_STRING */
    return (STRCMP(*(char_u **)varp, p->def_val[dvi]) == 0);
}

/*
 * showoneopt: show the value of one option
 * must not be called with a hidden option!
 */
    static void
showoneopt(p, opt_flags)
    struct vimoption    *p;
    int                 opt_flags;  /* OPT_LOCAL or OPT_GLOBAL */
{
    char_u  *varp;
    int           save_silent = silent_mode;

    silent_mode = FALSE;
    info_message = TRUE;      /* use mch_msg(), not mch_errmsg() */

    varp = get_varp_scope(p, opt_flags);

    /* for 'modified' we also need to check if 'ff' or 'fenc' changed. */
    if ((p->flags & P_BOOL) && ((int *)varp == &curbuf->b_changed
                              ? !curbufIsChanged() : !*(int *)varp))
      MSG_PUTS("no");
    else if ((p->flags & P_BOOL) && *(int *)varp < 0)
      MSG_PUTS("--");
    else
      MSG_PUTS("  ");
    MSG_PUTS(p->fullname);
    if (!(p->flags & P_BOOL))
    {
      msg_putchar('=');
      /* put value string in NameBuff */
      option_value2string(p, opt_flags);
      msg_outtrans(NameBuff);
    }

    silent_mode = save_silent;
    info_message = FALSE;
}

/*
 * Write modified options as ":set" commands to a file.
 *
 * There are three values for "opt_flags":
 * OPT_GLOBAL:             Write global option values and fresh values of
 *                   buffer-local options (used for start of a session
 *                   file).
 * OPT_GLOBAL + OPT_LOCAL: Idem, add fresh values of window-local options for
 *                   curwin (used for a vimrc file).
 * OPT_LOCAL:              Write buffer-local option values for curbuf, fresh
 *                   and local values for window-local options of
 *                   curwin.  Local values are also written when at the
 *                   default value, because a modeline or autocommand
 *                   may have set them when doing ":edit file" and the
 *                   user has set them back at the default or fresh
 *                   value.
 *                   When "local_only" is TRUE, don't write fresh
 *                   values, only local values (for ":mkview").
 * (fresh value = value used for a new buffer or window for a local option).
 *
 * Return FAIL on error, OK otherwise.
 */
    int
makeset(fd, opt_flags, local_only)
    FILE    *fd;
    int           opt_flags;
    int           local_only;
{
    struct vimoption    *p;
    char_u        *varp;                  /* currently used value */
    char_u        *varp_fresh;            /* local value */
    char_u        *varp_local = NULL;     /* fresh value */
    char          *cmd;
    int                 round;
    int                 pri;

    /*
     * The options that don't have a default (terminal name, columns, lines)
     * are never written.  Terminal options are also not written.
     * Do the loop over "options[]" twice: once for options with the
     * P_PRI_MKRC flag and once without.
     */
    for (pri = 1; pri >= 0; --pri)
    {
      for (p = &options[0]; !istermoption(p); p++)
      if (!(p->flags & P_NO_MKRC)
            && !istermoption(p)
            && ((pri == 1) == ((p->flags & P_PRI_MKRC) != 0)))
      {
          /* skip global option when only doing locals */
          if (p->indir == PV_NONE && !(opt_flags & OPT_GLOBAL))
            continue;

          /* Do not store options like 'bufhidden' and 'syntax' in a vimrc
           * file, they are always buffer-specific. */
          if ((opt_flags & OPT_GLOBAL) && (p->flags & P_NOGLOB))
            continue;

          /* Global values are only written when not at the default value. */
          varp = get_varp_scope(p, opt_flags);
          if ((opt_flags & OPT_GLOBAL) && optval_default(p, varp))
            continue;

          round = 2;
          if (p->indir != PV_NONE)
          {
            if (p->var == VAR_WIN)
            {
                /* skip window-local option when only doing globals */
                if (!(opt_flags & OPT_LOCAL))
                  continue;
                /* When fresh value of window-local option is not at the
                 * default, need to write it too. */
                if (!(opt_flags & OPT_GLOBAL) && !local_only)
                {
                  varp_fresh = get_varp_scope(p, OPT_GLOBAL);
                  if (!optval_default(p, varp_fresh))
                  {
                      round = 1;
                      varp_local = varp;
                      varp = varp_fresh;
                  }
                }
            }
          }

          /* Round 1: fresh value for window-local options.
           * Round 2: other values */
          for ( ; round <= 2; varp = varp_local, ++round)
          {
            if (round == 1 || (opt_flags & OPT_GLOBAL))
                cmd = "set";
            else
                cmd = "setlocal";

            if (p->flags & P_BOOL)
            {
                if (put_setbool(fd, cmd, p->fullname, *(int *)varp) == FAIL)
                  return FAIL;
            }
            else if (p->flags & P_NUM)
            {
                if (put_setnum(fd, cmd, p->fullname, (long *)varp) == FAIL)
                  return FAIL;
            }
            else    /* P_STRING */
            {
#if defined(FEAT_SYN_HL) || defined(FEAT_AUTOCMD)
                int           do_endif = FALSE;

                /* Don't set 'syntax' and 'filetype' again if the value is
                 * already right, avoids reloading the syntax file. */
                if (
# if defined(FEAT_SYN_HL)
                      p->indir == PV_SYN
#  if defined(FEAT_AUTOCMD)
                      ||
#  endif
# endif
# if defined(FEAT_AUTOCMD)
                      p->indir == PV_FT
# endif
                      )
                {
                  if (fprintf(fd, "if &%s != '%s'", p->fullname,
                                           *(char_u **)(varp)) < 0
                        || put_eol(fd) < 0)
                      return FAIL;
                  do_endif = TRUE;
                }
#endif
                if (put_setstring(fd, cmd, p->fullname, (char_u **)varp,
                                (p->flags & P_EXPAND) != 0) == FAIL)
                  return FAIL;
#if defined(FEAT_SYN_HL) || defined(FEAT_AUTOCMD)
                if (do_endif)
                {
                  if (put_line(fd, "endif") == FAIL)
                      return FAIL;
                }
#endif
            }
          }
      }
    }
    return OK;
}

#if defined(FEAT_FOLDING) || defined(PROTO)
/*
 * Generate set commands for the local fold options only.  Used when
 * 'sessionoptions' or 'viewoptions' contains "folds" but not "options".
 */
    int
makefoldset(fd)
    FILE    *fd;
{
    if (put_setstring(fd, "setlocal", "fdm", &curwin->w_p_fdm, FALSE) == FAIL
# ifdef FEAT_EVAL
          || put_setstring(fd, "setlocal", "fde", &curwin->w_p_fde, FALSE)
                                                       == FAIL
# endif
          || put_setstring(fd, "setlocal", "fmr", &curwin->w_p_fmr, FALSE)
                                                       == FAIL
          || put_setstring(fd, "setlocal", "fdi", &curwin->w_p_fdi, FALSE)
                                                       == FAIL
          || put_setnum(fd, "setlocal", "fdl", &curwin->w_p_fdl) == FAIL
          || put_setnum(fd, "setlocal", "fml", &curwin->w_p_fml) == FAIL
          || put_setnum(fd, "setlocal", "fdn", &curwin->w_p_fdn) == FAIL
          || put_setbool(fd, "setlocal", "fen", curwin->w_p_fen) == FAIL
          )
      return FAIL;

    return OK;
}
#endif

    static int
put_setstring(fd, cmd, name, valuep, expand)
    FILE    *fd;
    char    *cmd;
    char    *name;
    char_u  **valuep;
    int           expand;
{
    char_u  *s;
    char_u  buf[MAXPATHL];

    if (fprintf(fd, "%s %s=", cmd, name) < 0)
      return FAIL;
    if (*valuep != NULL)
    {
      /* Output 'pastetoggle' as key names.  For other
       * options some characters have to be escaped with
       * CTRL-V or backslash */
      if (valuep == &p_pt)
      {
          s = *valuep;
          while (*s != NUL)
            if (put_escstr(fd, str2special(&s, FALSE), 2) == FAIL)
                return FAIL;
      }
      else if (expand)
      {
          home_replace(NULL, *valuep, buf, MAXPATHL, FALSE);
          if (put_escstr(fd, buf, 2) == FAIL)
            return FAIL;
      }
      else if (put_escstr(fd, *valuep, 2) == FAIL)
          return FAIL;
    }
    if (put_eol(fd) < 0)
      return FAIL;
    return OK;
}

    static int
put_setnum(fd, cmd, name, valuep)
    FILE    *fd;
    char    *cmd;
    char    *name;
    long    *valuep;
{
    long    wc;

    if (fprintf(fd, "%s %s=", cmd, name) < 0)
      return FAIL;
    if (wc_use_keyname((char_u *)valuep, &wc))
    {
      /* print 'wildchar' and 'wildcharm' as a key name */
      if (fputs((char *)get_special_key_name((int)wc, 0), fd) < 0)
          return FAIL;
    }
    else if (fprintf(fd, "%ld", *valuep) < 0)
      return FAIL;
    if (put_eol(fd) < 0)
      return FAIL;
    return OK;
}

    static int
put_setbool(fd, cmd, name, value)
    FILE    *fd;
    char    *cmd;
    char    *name;
    int           value;
{
    if (value < 0)      /* global/local option using global value */
      return OK;
    if (fprintf(fd, "%s %s%s", cmd, value ? "" : "no", name) < 0
          || put_eol(fd) < 0)
      return FAIL;
    return OK;
}

/*
 * Clear all the terminal options.
 * If the option has been allocated, free the memory.
 * Terminal options are never hidden or indirect.
 */
    void
clear_termoptions()
{
    /*
     * Reset a few things before clearing the old options. This may cause
     * outputting a few things that the terminal doesn't understand, but the
     * screen will be cleared later, so this is OK.
     */
#ifdef FEAT_MOUSE_TTY
    mch_setmouse(FALSE);          /* switch mouse off */
#endif
#ifdef FEAT_TITLE
    mch_restore_title(3);         /* restore window titles */
#endif
#if defined(FEAT_XCLIPBOARD) && defined(FEAT_GUI)
    /* When starting the GUI close the display opened for the clipboard.
     * After restoring the title, because that will need the display. */
    if (gui.starting)
      clear_xterm_clip();
#endif
#ifdef WIN3264
    /*
     * Check if this is allowed now.
     */
    if (can_end_termcap_mode(FALSE) == TRUE)
#endif
      stoptermcap();                /* stop termcap mode */

    free_termoptions();
}

    void
free_termoptions()
{
    struct vimoption   *p;

    for (p = &options[0]; p->fullname != NULL; p++)
      if (istermoption(p))
      {
          if (p->flags & P_ALLOCED)
            free_string_option(*(char_u **)(p->var));
          if (p->flags & P_DEF_ALLOCED)
            free_string_option(p->def_val[VI_DEFAULT]);
          *(char_u **)(p->var) = empty_option;
          p->def_val[VI_DEFAULT] = empty_option;
          p->flags &= ~(P_ALLOCED|P_DEF_ALLOCED);
      }
    clear_termcodes();
}

/*
 * Free the string for one term option, if it was allocated.
 * Set the string to empty_option and clear allocated flag.
 * "var" points to the option value.
 */
    void
free_one_termoption(var)
    char_u *var;
{
    struct vimoption   *p;

    for (p = &options[0]; p->fullname != NULL; p++)
      if (p->var == var)
      {
          if (p->flags & P_ALLOCED)
            free_string_option(*(char_u **)(p->var));
          *(char_u **)(p->var) = empty_option;
          p->flags &= ~P_ALLOCED;
          break;
      }
}

/*
 * Set the terminal option defaults to the current value.
 * Used after setting the terminal name.
 */
    void
set_term_defaults()
{
    struct vimoption   *p;

    for (p = &options[0]; p->fullname != NULL; p++)
    {
      if (istermoption(p) && p->def_val[VI_DEFAULT] != *(char_u **)(p->var))
      {
          if (p->flags & P_DEF_ALLOCED)
          {
            free_string_option(p->def_val[VI_DEFAULT]);
            p->flags &= ~P_DEF_ALLOCED;
          }
          p->def_val[VI_DEFAULT] = *(char_u **)(p->var);
          if (p->flags & P_ALLOCED)
          {
            p->flags |= P_DEF_ALLOCED;
            p->flags &= ~P_ALLOCED;  /* don't free the value now */
          }
      }
    }
}

/*
 * return TRUE if 'p' starts with 't_'
 */
    static int
istermoption(p)
    struct vimoption *p;
{
    return (p->fullname[0] == 't' && p->fullname[1] == '_');
}

/*
 * Compute columns for ruler and shown command. 'sc_col' is also used to
 * decide what the maximum length of a message on the status line can be.
 * If there is a status line for the last window, 'sc_col' is independent
 * of 'ru_col'.
 */

#define COL_RULER 17        /* columns needed by standard ruler */

    void
comp_col()
{
#if defined(FEAT_CMDL_INFO) && defined(FEAT_WINDOWS)
    int last_has_status = (p_ls == 2 || (p_ls == 1 && firstwin != lastwin));

    sc_col = 0;
    ru_col = 0;
    if (p_ru)
    {
#ifdef FEAT_STL_OPT
      ru_col = (ru_wid ? ru_wid : COL_RULER) + 1;
#else
      ru_col = COL_RULER + 1;
#endif
      /* no last status line, adjust sc_col */
      if (!last_has_status)
          sc_col = ru_col;
    }
    if (p_sc)
    {
      sc_col += SHOWCMD_COLS;
      if (!p_ru || last_has_status)     /* no need for separating space */
          ++sc_col;
    }
    sc_col = Columns - sc_col;
    ru_col = Columns - ru_col;
    if (sc_col <= 0)          /* screen too narrow, will become a mess */
      sc_col = 1;
    if (ru_col <= 0)
      ru_col = 1;
#else
    sc_col = Columns;
    ru_col = Columns;
#endif
}

/*
 * Get pointer to option variable, depending on local or global scope.
 */
    static char_u *
get_varp_scope(p, opt_flags)
    struct vimoption    *p;
    int                 opt_flags;
{
    if ((opt_flags & OPT_GLOBAL) && p->indir != PV_NONE)
    {
      if (p->var == VAR_WIN)
          return (char_u *)GLOBAL_WO(get_varp(p));
      return p->var;
    }
    if ((opt_flags & OPT_LOCAL) && ((int)p->indir & PV_BOTH))
    {
      switch ((int)p->indir)
      {
#ifdef FEAT_QUICKFIX
          case PV_EFM:  return (char_u *)&(curbuf->b_p_efm);
          case PV_GP:   return (char_u *)&(curbuf->b_p_gp);
          case PV_MP:   return (char_u *)&(curbuf->b_p_mp);
#endif
          case PV_EP:   return (char_u *)&(curbuf->b_p_ep);
          case PV_KP:   return (char_u *)&(curbuf->b_p_kp);
          case PV_PATH: return (char_u *)&(curbuf->b_p_path);
          case PV_AR:   return (char_u *)&(curbuf->b_p_ar);
          case PV_TAGS: return (char_u *)&(curbuf->b_p_tags);
#ifdef FEAT_FIND_ID
          case PV_DEF:  return (char_u *)&(curbuf->b_p_def);
          case PV_INC:  return (char_u *)&(curbuf->b_p_inc);
#endif
#ifdef FEAT_INS_EXPAND
          case PV_DICT: return (char_u *)&(curbuf->b_p_dict);
          case PV_TSR:  return (char_u *)&(curbuf->b_p_tsr);
#endif
#if defined(FEAT_BEVAL) && defined(FEAT_EVAL)
          case PV_BEXPR: return (char_u *)&(curbuf->b_p_bexpr);
#endif
#ifdef FEAT_STL_OPT
          case PV_STL:  return (char_u *)&(curwin->w_p_stl);
#endif
      }
      return NULL; /* "cannot happen" */
    }
    return get_varp(p);
}

/*
 * Get pointer to option variable.
 */
    static char_u *
get_varp(p)
    struct vimoption    *p;
{
    /* hidden option, always return NULL */
    if (p->var == NULL)
      return NULL;

    switch ((int)p->indir)
    {
      case PV_NONE:     return p->var;

      /* global option with local value: use local value if it's been set */
      case PV_EP: return *curbuf->b_p_ep != NUL
                            ? (char_u *)&curbuf->b_p_ep : p->var;
      case PV_KP: return *curbuf->b_p_kp != NUL
                            ? (char_u *)&curbuf->b_p_kp : p->var;
      case PV_PATH:     return *curbuf->b_p_path != NUL
                            ? (char_u *)&(curbuf->b_p_path) : p->var;
      case PV_AR: return curbuf->b_p_ar >= 0
                            ? (char_u *)&(curbuf->b_p_ar) : p->var;
      case PV_TAGS:     return *curbuf->b_p_tags != NUL
                            ? (char_u *)&(curbuf->b_p_tags) : p->var;
#ifdef FEAT_FIND_ID
      case PV_DEF:      return *curbuf->b_p_def != NUL
                            ? (char_u *)&(curbuf->b_p_def) : p->var;
      case PV_INC:      return *curbuf->b_p_inc != NUL
                            ? (char_u *)&(curbuf->b_p_inc) : p->var;
#endif
#ifdef FEAT_INS_EXPAND
      case PV_DICT:     return *curbuf->b_p_dict != NUL
                            ? (char_u *)&(curbuf->b_p_dict) : p->var;
      case PV_TSR:      return *curbuf->b_p_tsr != NUL
                            ? (char_u *)&(curbuf->b_p_tsr) : p->var;
#endif
#ifdef FEAT_QUICKFIX
      case PV_EFM:      return *curbuf->b_p_efm != NUL
                            ? (char_u *)&(curbuf->b_p_efm) : p->var;
      case PV_GP: return *curbuf->b_p_gp != NUL
                            ? (char_u *)&(curbuf->b_p_gp) : p->var;
      case PV_MP: return *curbuf->b_p_mp != NUL
                            ? (char_u *)&(curbuf->b_p_mp) : p->var;
#endif
#if defined(FEAT_BEVAL) && defined(FEAT_EVAL)
      case PV_BEXPR:    return *curbuf->b_p_bexpr != NUL
                            ? (char_u *)&(curbuf->b_p_bexpr) : p->var;
#endif
#ifdef FEAT_STL_OPT
      case PV_STL:      return *curwin->w_p_stl != NUL
                            ? (char_u *)&(curwin->w_p_stl) : p->var;
#endif

#ifdef FEAT_ARABIC
      case PV_ARAB:     return (char_u *)&(curwin->w_p_arab);
#endif
      case PV_LIST:     return (char_u *)&(curwin->w_p_list);
#ifdef FEAT_SPELL
      case PV_SPELL:    return (char_u *)&(curwin->w_p_spell);
#endif
#ifdef FEAT_SYN_HL
      case PV_CUC:      return (char_u *)&(curwin->w_p_cuc);
      case PV_CUL:      return (char_u *)&(curwin->w_p_cul);
#endif
#ifdef FEAT_DIFF
      case PV_DIFF:     return (char_u *)&(curwin->w_p_diff);
#endif
#ifdef FEAT_FOLDING
      case PV_FDC:      return (char_u *)&(curwin->w_p_fdc);
      case PV_FEN:      return (char_u *)&(curwin->w_p_fen);
      case PV_FDI:      return (char_u *)&(curwin->w_p_fdi);
      case PV_FDL:      return (char_u *)&(curwin->w_p_fdl);
      case PV_FDM:      return (char_u *)&(curwin->w_p_fdm);
      case PV_FML:      return (char_u *)&(curwin->w_p_fml);
      case PV_FDN:      return (char_u *)&(curwin->w_p_fdn);
# ifdef FEAT_EVAL
      case PV_FDE:      return (char_u *)&(curwin->w_p_fde);
      case PV_FDT:      return (char_u *)&(curwin->w_p_fdt);
# endif
      case PV_FMR:      return (char_u *)&(curwin->w_p_fmr);
#endif
      case PV_NU: return (char_u *)&(curwin->w_p_nu);
#ifdef FEAT_LINEBREAK
      case PV_NUW:      return (char_u *)&(curwin->w_p_nuw);
#endif
#ifdef FEAT_WINDOWS
      case PV_WFH:      return (char_u *)&(curwin->w_p_wfh);
#endif
#ifdef FEAT_VERTSPLIT
      case PV_WFW:      return (char_u *)&(curwin->w_p_wfw);
#endif
#if defined(FEAT_WINDOWS) && defined(FEAT_QUICKFIX)
      case PV_PVW:      return (char_u *)&(curwin->w_p_pvw);
#endif
#ifdef FEAT_RIGHTLEFT
      case PV_RL: return (char_u *)&(curwin->w_p_rl);
      case PV_RLC:      return (char_u *)&(curwin->w_p_rlc);
#endif
      case PV_SCROLL:   return (char_u *)&(curwin->w_p_scr);
      case PV_WRAP:     return (char_u *)&(curwin->w_p_wrap);
#ifdef FEAT_LINEBREAK
      case PV_LBR:      return (char_u *)&(curwin->w_p_lbr);
#endif
#ifdef FEAT_SCROLLBIND
      case PV_SCBIND: return (char_u *)&(curwin->w_p_scb);
#endif

      case PV_AI: return (char_u *)&(curbuf->b_p_ai);
      case PV_BIN:      return (char_u *)&(curbuf->b_p_bin);
#ifdef FEAT_MBYTE
      case PV_BOMB:     return (char_u *)&(curbuf->b_p_bomb);
#endif
#if defined(FEAT_QUICKFIX)
      case PV_BH: return (char_u *)&(curbuf->b_p_bh);
      case PV_BT: return (char_u *)&(curbuf->b_p_bt);
#endif
      case PV_BL: return (char_u *)&(curbuf->b_p_bl);
      case PV_CI: return (char_u *)&(curbuf->b_p_ci);
#ifdef FEAT_CINDENT
      case PV_CIN:      return (char_u *)&(curbuf->b_p_cin);
      case PV_CINK:     return (char_u *)&(curbuf->b_p_cink);
      case PV_CINO:     return (char_u *)&(curbuf->b_p_cino);
#endif
#if defined(FEAT_SMARTINDENT) || defined(FEAT_CINDENT)
      case PV_CINW:     return (char_u *)&(curbuf->b_p_cinw);
#endif
#ifdef FEAT_COMMENTS
      case PV_COM:      return (char_u *)&(curbuf->b_p_com);
#endif
#ifdef FEAT_FOLDING
      case PV_CMS:      return (char_u *)&(curbuf->b_p_cms);
#endif
#ifdef FEAT_INS_EXPAND
      case PV_CPT:      return (char_u *)&(curbuf->b_p_cpt);
#endif
#ifdef FEAT_COMPL_FUNC
      case PV_CFU:      return (char_u *)&(curbuf->b_p_cfu);
      case PV_OFU:      return (char_u *)&(curbuf->b_p_ofu);
#endif
      case PV_EOL:      return (char_u *)&(curbuf->b_p_eol);
      case PV_ET: return (char_u *)&(curbuf->b_p_et);
#ifdef FEAT_MBYTE
      case PV_FENC:     return (char_u *)&(curbuf->b_p_fenc);
#endif
      case PV_FF: return (char_u *)&(curbuf->b_p_ff);
#ifdef FEAT_AUTOCMD
      case PV_FT: return (char_u *)&(curbuf->b_p_ft);
#endif
      case PV_FO: return (char_u *)&(curbuf->b_p_fo);
      case PV_FLP:      return (char_u *)&(curbuf->b_p_flp);
      case PV_IMI:      return (char_u *)&(curbuf->b_p_iminsert);
      case PV_IMS:      return (char_u *)&(curbuf->b_p_imsearch);
      case PV_INF:      return (char_u *)&(curbuf->b_p_inf);
      case PV_ISK:      return (char_u *)&(curbuf->b_p_isk);
#ifdef FEAT_FIND_ID
# ifdef FEAT_EVAL
      case PV_INEX:     return (char_u *)&(curbuf->b_p_inex);
# endif
#endif
#if defined(FEAT_CINDENT) && defined(FEAT_EVAL)
      case PV_INDE:     return (char_u *)&(curbuf->b_p_inde);
      case PV_INDK:     return (char_u *)&(curbuf->b_p_indk);
#endif
#ifdef FEAT_EVAL
      case PV_FEX:      return (char_u *)&(curbuf->b_p_fex);
#endif
#ifdef FEAT_CRYPT
      case PV_KEY:      return (char_u *)&(curbuf->b_p_key);
#endif
#ifdef FEAT_LISP
      case PV_LISP:     return (char_u *)&(curbuf->b_p_lisp);
#endif
      case PV_ML: return (char_u *)&(curbuf->b_p_ml);
      case PV_MPS:      return (char_u *)&(curbuf->b_p_mps);
      case PV_MA: return (char_u *)&(curbuf->b_p_ma);
      case PV_MOD:      return (char_u *)&(curbuf->b_changed);
      case PV_NF: return (char_u *)&(curbuf->b_p_nf);
#ifdef FEAT_OSFILETYPE
      case PV_OFT:      return (char_u *)&(curbuf->b_p_oft);
#endif
      case PV_PI: return (char_u *)&(curbuf->b_p_pi);
#ifdef FEAT_TEXTOBJ
      case PV_QE: return (char_u *)&(curbuf->b_p_qe);
#endif
      case PV_RO: return (char_u *)&(curbuf->b_p_ro);
#ifdef FEAT_SMARTINDENT
      case PV_SI: return (char_u *)&(curbuf->b_p_si);
#endif
#ifndef SHORT_FNAME
      case PV_SN: return (char_u *)&(curbuf->b_p_sn);
#endif
      case PV_STS:      return (char_u *)&(curbuf->b_p_sts);
#ifdef FEAT_SEARCHPATH
      case PV_SUA:      return (char_u *)&(curbuf->b_p_sua);
#endif
      case PV_SWF:      return (char_u *)&(curbuf->b_p_swf);
#ifdef FEAT_SYN_HL
      case PV_SMC:      return (char_u *)&(curbuf->b_p_smc);
      case PV_SYN:      return (char_u *)&(curbuf->b_p_syn);
#endif
#ifdef FEAT_SPELL
      case PV_SPC:      return (char_u *)&(curbuf->b_p_spc);
      case PV_SPF:      return (char_u *)&(curbuf->b_p_spf);
      case PV_SPL:      return (char_u *)&(curbuf->b_p_spl);
#endif
      case PV_SW: return (char_u *)&(curbuf->b_p_sw);
      case PV_TS: return (char_u *)&(curbuf->b_p_ts);
      case PV_TW: return (char_u *)&(curbuf->b_p_tw);
      case PV_TX: return (char_u *)&(curbuf->b_p_tx);
      case PV_WM: return (char_u *)&(curbuf->b_p_wm);
#ifdef FEAT_KEYMAP
      case PV_KMAP:     return (char_u *)&(curbuf->b_p_keymap);
#endif
      default:    EMSG(_("E356: get_varp ERROR"));
    }
    /* always return a valid pointer to avoid a crash! */
    return (char_u *)&(curbuf->b_p_wm);
}

/*
 * Get the value of 'equalprg', either the buffer-local one or the global one.
 */
    char_u *
get_equalprg()
{
    if (*curbuf->b_p_ep == NUL)
      return p_ep;
    return curbuf->b_p_ep;
}

#if defined(FEAT_WINDOWS) || defined(PROTO)
/*
 * Copy options from one window to another.
 * Used when splitting a window.
 */
    void
win_copy_options(wp_from, wp_to)
    win_T   *wp_from;
    win_T   *wp_to;
{
    copy_winopt(&wp_from->w_onebuf_opt, &wp_to->w_onebuf_opt);
    copy_winopt(&wp_from->w_allbuf_opt, &wp_to->w_allbuf_opt);
# ifdef FEAT_RIGHTLEFT
#  ifdef FEAT_FKMAP
    /* Is this right? */
    wp_to->w_farsi = wp_from->w_farsi;
#  endif
# endif
}
#endif

/*
 * Copy the options from one winopt_T to another.
 * Doesn't free the old option values in "to", use clear_winopt() for that.
 * The 'scroll' option is not copied, because it depends on the window height.
 * The 'previewwindow' option is reset, there can be only one preview window.
 */
    void
copy_winopt(from, to)
    winopt_T      *from;
    winopt_T      *to;
{
#ifdef FEAT_ARABIC
    to->wo_arab = from->wo_arab;
#endif
    to->wo_list = from->wo_list;
    to->wo_nu = from->wo_nu;
#ifdef FEAT_LINEBREAK
    to->wo_nuw = from->wo_nuw;
#endif
#ifdef FEAT_RIGHTLEFT
    to->wo_rl  = from->wo_rl;
    to->wo_rlc = vim_strsave(from->wo_rlc);
#endif
#ifdef FEAT_STL_OPT
    to->wo_stl = vim_strsave(from->wo_stl);
#endif
    to->wo_wrap = from->wo_wrap;
#ifdef FEAT_LINEBREAK
    to->wo_lbr = from->wo_lbr;
#endif
#ifdef FEAT_SCROLLBIND
    to->wo_scb = from->wo_scb;
#endif
#ifdef FEAT_SPELL
    to->wo_spell = from->wo_spell;
#endif
#ifdef FEAT_SYN_HL
    to->wo_cuc = from->wo_cuc;
    to->wo_cul = from->wo_cul;
#endif
#ifdef FEAT_DIFF
    to->wo_diff = from->wo_diff;
#endif
#ifdef FEAT_FOLDING
    to->wo_fdc = from->wo_fdc;
    to->wo_fen = from->wo_fen;
    to->wo_fdi = vim_strsave(from->wo_fdi);
    to->wo_fml = from->wo_fml;
    to->wo_fdl = from->wo_fdl;
    to->wo_fdm = vim_strsave(from->wo_fdm);
    to->wo_fdn = from->wo_fdn;
# ifdef FEAT_EVAL
    to->wo_fde = vim_strsave(from->wo_fde);
    to->wo_fdt = vim_strsave(from->wo_fdt);
# endif
    to->wo_fmr = vim_strsave(from->wo_fmr);
#endif
    check_winopt(to);         /* don't want NULL pointers */
}

/*
 * Check string options in a window for a NULL value.
 */
    void
check_win_options(win)
    win_T   *win;
{
    check_winopt(&win->w_onebuf_opt);
    check_winopt(&win->w_allbuf_opt);
}

/*
 * Check for NULL pointers in a winopt_T and replace them with empty_option.
 */
    void
check_winopt(wop)
    winopt_T      *wop UNUSED;
{
#ifdef FEAT_FOLDING
    check_string_option(&wop->wo_fdi);
    check_string_option(&wop->wo_fdm);
# ifdef FEAT_EVAL
    check_string_option(&wop->wo_fde);
    check_string_option(&wop->wo_fdt);
# endif
    check_string_option(&wop->wo_fmr);
#endif
#ifdef FEAT_RIGHTLEFT
    check_string_option(&wop->wo_rlc);
#endif
#ifdef FEAT_STL_OPT
    check_string_option(&wop->wo_stl);
#endif
}

/*
 * Free the allocated memory inside a winopt_T.
 */
    void
clear_winopt(wop)
    winopt_T      *wop UNUSED;
{
#ifdef FEAT_FOLDING
    clear_string_option(&wop->wo_fdi);
    clear_string_option(&wop->wo_fdm);
# ifdef FEAT_EVAL
    clear_string_option(&wop->wo_fde);
    clear_string_option(&wop->wo_fdt);
# endif
    clear_string_option(&wop->wo_fmr);
#endif
#ifdef FEAT_RIGHTLEFT
    clear_string_option(&wop->wo_rlc);
#endif
#ifdef FEAT_STL_OPT
    clear_string_option(&wop->wo_stl);
#endif
}

/*
 * Copy global option values to local options for one buffer.
 * Used when creating a new buffer and sometimes when entering a buffer.
 * flags:
 * BCO_ENTER      We will enter the buf buffer.
 * BCO_ALWAYS     Always copy the options, but only set b_p_initialized when
 *          appropriate.
 * BCO_NOHELP     Don't copy the values to a help buffer.
 */
    void
buf_copy_options(buf, flags)
    buf_T   *buf;
    int           flags;
{
    int           should_copy = TRUE;
    char_u  *save_p_isk = NULL;         /* init for GCC */
    int           dont_do_help;
    int           did_isk = FALSE;

    /*
     * Don't do anything of the buffer is invalid.
     */
    if (buf == NULL || !buf_valid(buf))
      return;

    /*
     * Skip this when the option defaults have not been set yet.  Happens when
     * main() allocates the first buffer.
     */
    if (p_cpo != NULL)
    {
      /*
       * Always copy when entering and 'cpo' contains 'S'.
       * Don't copy when already initialized.
       * Don't copy when 'cpo' contains 's' and not entering.
       * 'S'      BCO_ENTER  initialized  's'  should_copy
       * yes        yes        X     X    TRUE
       * yes        no        yes    X    FALSE
       * no    X        yes    X    FALSE
       *  X   no        no    yes   FALSE
       *  X   no        no    no    TRUE
       * no   yes       no     X    TRUE
       */
      if ((vim_strchr(p_cpo, CPO_BUFOPTGLOB) == NULL || !(flags & BCO_ENTER))
            && (buf->b_p_initialized
                || (!(flags & BCO_ENTER)
                  && vim_strchr(p_cpo, CPO_BUFOPT) != NULL)))
          should_copy = FALSE;

      if (should_copy || (flags & BCO_ALWAYS))
      {
          /* Don't copy the options specific to a help buffer when
           * BCO_NOHELP is given or the options were initialized already
           * (jumping back to a help file with CTRL-T or CTRL-O) */
          dont_do_help = ((flags & BCO_NOHELP) && buf->b_help)
                                           || buf->b_p_initialized;
          if (dont_do_help)         /* don't free b_p_isk */
          {
            save_p_isk = buf->b_p_isk;
            buf->b_p_isk = NULL;
          }
          /*
           * Always free the allocated strings.
           * If not already initialized, set 'readonly' and copy 'fileformat'.
           */
          if (!buf->b_p_initialized)
          {
            free_buf_options(buf, TRUE);
            buf->b_p_ro = FALSE;          /* don't copy readonly */
            buf->b_p_tx = p_tx;
#ifdef FEAT_MBYTE
            buf->b_p_fenc = vim_strsave(p_fenc);
#endif
            buf->b_p_ff = vim_strsave(p_ff);
#if defined(FEAT_QUICKFIX)
            buf->b_p_bh = empty_option;
            buf->b_p_bt = empty_option;
#endif
          }
          else
            free_buf_options(buf, FALSE);

          buf->b_p_ai = p_ai;
          buf->b_p_ai_nopaste = p_ai_nopaste;
          buf->b_p_sw = p_sw;
          buf->b_p_tw = p_tw;
          buf->b_p_tw_nopaste = p_tw_nopaste;
          buf->b_p_tw_nobin = p_tw_nobin;
          buf->b_p_wm = p_wm;
          buf->b_p_wm_nopaste = p_wm_nopaste;
          buf->b_p_wm_nobin = p_wm_nobin;
          buf->b_p_bin = p_bin;
#ifdef FEAT_MBYTE
          buf->b_p_bomb = p_bomb;
#endif
          buf->b_p_et = p_et;
          buf->b_p_et_nobin = p_et_nobin;
          buf->b_p_ml = p_ml;
          buf->b_p_ml_nobin = p_ml_nobin;
          buf->b_p_inf = p_inf;
          buf->b_p_swf = p_swf;
#ifdef FEAT_INS_EXPAND
          buf->b_p_cpt = vim_strsave(p_cpt);
#endif
#ifdef FEAT_COMPL_FUNC
          buf->b_p_cfu = vim_strsave(p_cfu);
          buf->b_p_ofu = vim_strsave(p_ofu);
#endif
          buf->b_p_sts = p_sts;
          buf->b_p_sts_nopaste = p_sts_nopaste;
#ifndef SHORT_FNAME
          buf->b_p_sn = p_sn;
#endif
#ifdef FEAT_COMMENTS
          buf->b_p_com = vim_strsave(p_com);
#endif
#ifdef FEAT_FOLDING
          buf->b_p_cms = vim_strsave(p_cms);
#endif
          buf->b_p_fo = vim_strsave(p_fo);
          buf->b_p_flp = vim_strsave(p_flp);
          buf->b_p_nf = vim_strsave(p_nf);
          buf->b_p_mps = vim_strsave(p_mps);
#ifdef FEAT_SMARTINDENT
          buf->b_p_si = p_si;
#endif
          buf->b_p_ci = p_ci;
#ifdef FEAT_CINDENT
          buf->b_p_cin = p_cin;
          buf->b_p_cink = vim_strsave(p_cink);
          buf->b_p_cino = vim_strsave(p_cino);
#endif
#ifdef FEAT_AUTOCMD
          /* Don't copy 'filetype', it must be detected */
          buf->b_p_ft = empty_option;
#endif
#ifdef FEAT_OSFILETYPE
          buf->b_p_oft = vim_strsave(p_oft);
#endif
          buf->b_p_pi = p_pi;
#if defined(FEAT_SMARTINDENT) || defined(FEAT_CINDENT)
          buf->b_p_cinw = vim_strsave(p_cinw);
#endif
#ifdef FEAT_LISP
          buf->b_p_lisp = p_lisp;
#endif
#ifdef FEAT_SYN_HL
          /* Don't copy 'syntax', it must be set */
          buf->b_p_syn = empty_option;
          buf->b_p_smc = p_smc;
#endif
#ifdef FEAT_SPELL
          buf->b_p_spc = vim_strsave(p_spc);
          (void)compile_cap_prog(buf);
          buf->b_p_spf = vim_strsave(p_spf);
          buf->b_p_spl = vim_strsave(p_spl);
#endif
#if defined(FEAT_CINDENT) && defined(FEAT_EVAL)
          buf->b_p_inde = vim_strsave(p_inde);
          buf->b_p_indk = vim_strsave(p_indk);
#endif
#if defined(FEAT_EVAL)
          buf->b_p_fex = vim_strsave(p_fex);
#endif
#ifdef FEAT_CRYPT
          buf->b_p_key = vim_strsave(p_key);
#endif
#ifdef FEAT_SEARCHPATH
          buf->b_p_sua = vim_strsave(p_sua);
#endif
#ifdef FEAT_KEYMAP
          buf->b_p_keymap = vim_strsave(p_keymap);
          buf->b_kmap_state |= KEYMAP_INIT;
#endif
          /* This isn't really an option, but copying the langmap and IME
           * state from the current buffer is better than resetting it. */
          buf->b_p_iminsert = p_iminsert;
          buf->b_p_imsearch = p_imsearch;

          /* options that are normally global but also have a local value
           * are not copied, start using the global value */
          buf->b_p_ar = -1;
#ifdef FEAT_QUICKFIX
          buf->b_p_gp = empty_option;
          buf->b_p_mp = empty_option;
          buf->b_p_efm = empty_option;
#endif
          buf->b_p_ep = empty_option;
          buf->b_p_kp = empty_option;
          buf->b_p_path = empty_option;
          buf->b_p_tags = empty_option;
#ifdef FEAT_FIND_ID
          buf->b_p_def = empty_option;
          buf->b_p_inc = empty_option;
# ifdef FEAT_EVAL
          buf->b_p_inex = vim_strsave(p_inex);
# endif
#endif
#ifdef FEAT_INS_EXPAND
          buf->b_p_dict = empty_option;
          buf->b_p_tsr = empty_option;
#endif
#ifdef FEAT_TEXTOBJ
          buf->b_p_qe = vim_strsave(p_qe);
#endif
#if defined(FEAT_BEVAL) && defined(FEAT_EVAL)
          buf->b_p_bexpr = empty_option;
#endif

          /*
           * Don't copy the options set by ex_help(), use the saved values,
           * when going from a help buffer to a non-help buffer.
           * Don't touch these at all when BCO_NOHELP is used and going from
           * or to a help buffer.
           */
          if (dont_do_help)
            buf->b_p_isk = save_p_isk;
          else
          {
            buf->b_p_isk = vim_strsave(p_isk);
            did_isk = TRUE;
            buf->b_p_ts = p_ts;
            buf->b_help = FALSE;
#ifdef FEAT_QUICKFIX
            if (buf->b_p_bt[0] == 'h')
                clear_string_option(&buf->b_p_bt);
#endif
            buf->b_p_ma = p_ma;
          }
      }

      /*
       * When the options should be copied (ignoring BCO_ALWAYS), set the
       * flag that indicates that the options have been initialized.
       */
      if (should_copy)
          buf->b_p_initialized = TRUE;
    }

    check_buf_options(buf);       /* make sure we don't have NULLs */
    if (did_isk)
      (void)buf_init_chartab(buf, FALSE);
}

/*
 * Reset the 'modifiable' option and its default value.
 */
    void
reset_modifiable()
{
    int           opt_idx;

    curbuf->b_p_ma = FALSE;
    p_ma = FALSE;
    opt_idx = findoption((char_u *)"ma");
    if (opt_idx >= 0)
      options[opt_idx].def_val[VI_DEFAULT] = FALSE;
}

/*
 * Set the global value for 'iminsert' to the local value.
 */
    void
set_iminsert_global()
{
    p_iminsert = curbuf->b_p_iminsert;
}

/*
 * Set the global value for 'imsearch' to the local value.
 */
    void
set_imsearch_global()
{
    p_imsearch = curbuf->b_p_imsearch;
}

#if defined(FEAT_CMDL_COMPL) || defined(PROTO)
static int expand_option_idx = -1;
static char_u expand_option_name[5] = {'t', '_', NUL, NUL, NUL};
static int expand_option_flags = 0;

    void
set_context_in_set_cmd(xp, arg, opt_flags)
    expand_T      *xp;
    char_u  *arg;
    int           opt_flags;  /* OPT_GLOBAL and/or OPT_LOCAL */
{
    int           nextchar;
    long_u  flags = 0;  /* init for GCC */
    int           opt_idx = 0;      /* init for GCC */
    char_u  *p;
    char_u  *s;
    int           is_term_option = FALSE;
    int           key;

    expand_option_flags = opt_flags;

    xp->xp_context = EXPAND_SETTINGS;
    if (*arg == NUL)
    {
      xp->xp_pattern = arg;
      return;
    }
    p = arg + STRLEN(arg) - 1;
    if (*p == ' ' && *(p - 1) != '\\')
    {
      xp->xp_pattern = p + 1;
      return;
    }
    while (p > arg)
    {
      s = p;
      /* count number of backslashes before ' ' or ',' */
      if (*p == ' ' || *p == ',')
      {
          while (s > arg && *(s - 1) == '\\')
            --s;
      }
      /* break at a space with an even number of backslashes */
      if (*p == ' ' && ((p - s) & 1) == 0)
      {
          ++p;
          break;
      }
      --p;
    }
    if (STRNCMP(p, "no", 2) == 0 && STRNCMP(p, "novice", 6) != 0)
    {
      xp->xp_context = EXPAND_BOOL_SETTINGS;
      p += 2;
    }
    if (STRNCMP(p, "inv", 3) == 0)
    {
      xp->xp_context = EXPAND_BOOL_SETTINGS;
      p += 3;
    }
    xp->xp_pattern = arg = p;
    if (*arg == '<')
    {
      while (*p != '>')
          if (*p++ == NUL)        /* expand terminal option name */
            return;
      key = get_special_key_code(arg + 1);
      if (key == 0)               /* unknown name */
      {
          xp->xp_context = EXPAND_NOTHING;
          return;
      }
      nextchar = *++p;
      is_term_option = TRUE;
      expand_option_name[2] = KEY2TERMCAP0(key);
      expand_option_name[3] = KEY2TERMCAP1(key);
    }
    else
    {
      if (p[0] == 't' && p[1] == '_')
      {
          p += 2;
          if (*p != NUL)
            ++p;
          if (*p == NUL)
            return;           /* expand option name */
          nextchar = *++p;
          is_term_option = TRUE;
          expand_option_name[2] = p[-2];
          expand_option_name[3] = p[-1];
      }
      else
      {
            /* Allow * wildcard */
          while (ASCII_ISALNUM(*p) || *p == '_' || *p == '*')
            p++;
          if (*p == NUL)
            return;
          nextchar = *p;
          *p = NUL;
          opt_idx = findoption(arg);
          *p = nextchar;
          if (opt_idx == -1 || options[opt_idx].var == NULL)
          {
            xp->xp_context = EXPAND_NOTHING;
            return;
          }
          flags = options[opt_idx].flags;
          if (flags & P_BOOL)
          {
            xp->xp_context = EXPAND_NOTHING;
            return;
          }
      }
    }
    /* handle "-=" and "+=" */
    if ((nextchar == '-' || nextchar == '+' || nextchar == '^') && p[1] == '=')
    {
      ++p;
      nextchar = '=';
    }
    if ((nextchar != '=' && nextchar != ':')
                            || xp->xp_context == EXPAND_BOOL_SETTINGS)
    {
      xp->xp_context = EXPAND_UNSUCCESSFUL;
      return;
    }
    if (xp->xp_context != EXPAND_BOOL_SETTINGS && p[1] == NUL)
    {
      xp->xp_context = EXPAND_OLD_SETTING;
      if (is_term_option)
          expand_option_idx = -1;
      else
          expand_option_idx = opt_idx;
      xp->xp_pattern = p + 1;
      return;
    }
    xp->xp_context = EXPAND_NOTHING;
    if (is_term_option || (flags & P_NUM))
      return;

    xp->xp_pattern = p + 1;

    if (flags & P_EXPAND)
    {
      p = options[opt_idx].var;
      if (p == (char_u *)&p_bdir
            || p == (char_u *)&p_dir
            || p == (char_u *)&p_path
            || p == (char_u *)&p_rtp
#ifdef FEAT_SEARCHPATH
            || p == (char_u *)&p_cdpath
#endif
#ifdef FEAT_SESSION
            || p == (char_u *)&p_vdir
#endif
            )
      {
          xp->xp_context = EXPAND_DIRECTORIES;
          if (p == (char_u *)&p_path
#ifdef FEAT_SEARCHPATH
                || p == (char_u *)&p_cdpath
#endif
               )
            xp->xp_backslash = XP_BS_THREE;
          else
            xp->xp_backslash = XP_BS_ONE;
      }
      else
      {
          xp->xp_context = EXPAND_FILES;
          /* for 'tags' need three backslashes for a space */
          if (p == (char_u *)&p_tags)
            xp->xp_backslash = XP_BS_THREE;
          else
            xp->xp_backslash = XP_BS_ONE;
      }
    }

    /* For an option that is a list of file names, find the start of the
     * last file name. */
    for (p = arg + STRLEN(arg) - 1; p > xp->xp_pattern; --p)
    {
      /* count number of backslashes before ' ' or ',' */
      if (*p == ' ' || *p == ',')
      {
          s = p;
          while (s > xp->xp_pattern && *(s - 1) == '\\')
            --s;
          if ((*p == ' ' && (xp->xp_backslash == XP_BS_THREE && (p - s) < 3))
                || (*p == ',' && (flags & P_COMMA) && ((p - s) & 1) == 0))
          {
            xp->xp_pattern = p + 1;
            break;
          }
      }

#ifdef FEAT_SPELL
      /* for 'spellsuggest' start at "file:" */
      if (options[opt_idx].var == (char_u *)&p_sps
                                     && STRNCMP(p, "file:", 5) == 0)
      {
          xp->xp_pattern = p + 5;
          break;
      }
#endif
    }

    return;
}

    int
ExpandSettings(xp, regmatch, num_file, file)
    expand_T      *xp;
    regmatch_T    *regmatch;
    int           *num_file;
    char_u  ***file;
{
    int           num_normal = 0;       /* Nr of matching non-term-code settings */
    int           num_term = 0;         /* Nr of matching terminal code settings */
    int           opt_idx;
    int           match;
    int           count = 0;
    char_u  *str;
    int           loop;
    int           is_term_opt;
    char_u  name_buf[MAX_KEY_NAME_LEN];
    static char *(names[]) = {"all", "termcap"};
    int           ic = regmatch->rm_ic;   /* remember the ignore-case flag */

    /* do this loop twice:
     * loop == 0: count the number of matching options
     * loop == 1: copy the matching options into allocated memory
     */
    for (loop = 0; loop <= 1; ++loop)
    {
      regmatch->rm_ic = ic;
      if (xp->xp_context != EXPAND_BOOL_SETTINGS)
      {
          for (match = 0; match < (int)(sizeof(names) / sizeof(char *));
                                                      ++match)
            if (vim_regexec(regmatch, (char_u *)names[match], (colnr_T)0))
            {
                if (loop == 0)
                  num_normal++;
                else
                  (*file)[count++] = vim_strsave((char_u *)names[match]);
            }
      }
      for (opt_idx = 0; (str = (char_u *)options[opt_idx].fullname) != NULL;
                                                    opt_idx++)
      {
          if (options[opt_idx].var == NULL)
            continue;
          if (xp->xp_context == EXPAND_BOOL_SETTINGS
            && !(options[opt_idx].flags & P_BOOL))
            continue;
          is_term_opt = istermoption(&options[opt_idx]);
          if (is_term_opt && num_normal > 0)
            continue;
          match = FALSE;
          if (vim_regexec(regmatch, str, (colnr_T)0)
                || (options[opt_idx].shortname != NULL
                  && vim_regexec(regmatch,
                     (char_u *)options[opt_idx].shortname, (colnr_T)0)))
            match = TRUE;
          else if (is_term_opt)
          {
            name_buf[0] = '<';
            name_buf[1] = 't';
            name_buf[2] = '_';
            name_buf[3] = str[2];
            name_buf[4] = str[3];
            name_buf[5] = '>';
            name_buf[6] = NUL;
            if (vim_regexec(regmatch, name_buf, (colnr_T)0))
            {
                match = TRUE;
                str = name_buf;
            }
          }
          if (match)
          {
            if (loop == 0)
            {
                if (is_term_opt)
                  num_term++;
                else
                  num_normal++;
            }
            else
                (*file)[count++] = vim_strsave(str);
          }
      }
      /*
       * Check terminal key codes, these are not in the option table
       */
      if (xp->xp_context != EXPAND_BOOL_SETTINGS  && num_normal == 0)
      {
          for (opt_idx = 0; (str = get_termcode(opt_idx)) != NULL; opt_idx++)
          {
            if (!isprint(str[0]) || !isprint(str[1]))
                continue;

            name_buf[0] = 't';
            name_buf[1] = '_';
            name_buf[2] = str[0];
            name_buf[3] = str[1];
            name_buf[4] = NUL;

            match = FALSE;
            if (vim_regexec(regmatch, name_buf, (colnr_T)0))
                match = TRUE;
            else
            {
                name_buf[0] = '<';
                name_buf[1] = 't';
                name_buf[2] = '_';
                name_buf[3] = str[0];
                name_buf[4] = str[1];
                name_buf[5] = '>';
                name_buf[6] = NUL;

                if (vim_regexec(regmatch, name_buf, (colnr_T)0))
                  match = TRUE;
            }
            if (match)
            {
                if (loop == 0)
                  num_term++;
                else
                  (*file)[count++] = vim_strsave(name_buf);
            }
          }

          /*
           * Check special key names.
           */
          regmatch->rm_ic = TRUE;         /* ignore case here */
          for (opt_idx = 0; (str = get_key_name(opt_idx)) != NULL; opt_idx++)
          {
            name_buf[0] = '<';
            STRCPY(name_buf + 1, str);
            STRCAT(name_buf, ">");

            if (vim_regexec(regmatch, name_buf, (colnr_T)0))
            {
                if (loop == 0)
                  num_term++;
                else
                  (*file)[count++] = vim_strsave(name_buf);
            }
          }
      }
      if (loop == 0)
      {
          if (num_normal > 0)
            *num_file = num_normal;
          else if (num_term > 0)
            *num_file = num_term;
          else
            return OK;
          *file = (char_u **)alloc((unsigned)(*num_file * sizeof(char_u *)));
          if (*file == NULL)
          {
            *file = (char_u **)"";
            return FAIL;
          }
      }
    }
    return OK;
}

    int
ExpandOldSetting(num_file, file)
    int         *num_file;
    char_u  ***file;
{
    char_u  *var = NULL;      /* init for GCC */
    char_u  *buf;

    *num_file = 0;
    *file = (char_u **)alloc((unsigned)sizeof(char_u *));
    if (*file == NULL)
      return FAIL;

    /*
     * For a terminal key code expand_option_idx is < 0.
     */
    if (expand_option_idx < 0)
    {
      var = find_termcode(expand_option_name + 2);
      if (var == NULL)
          expand_option_idx = findoption(expand_option_name);
    }

    if (expand_option_idx >= 0)
    {
      /* put string of option value in NameBuff */
      option_value2string(&options[expand_option_idx], expand_option_flags);
      var = NameBuff;
    }
    else if (var == NULL)
      var = (char_u *)"";

    /* A backslash is required before some characters.  This is the reverse of
     * what happens in do_set(). */
    buf = vim_strsave_escaped(var, escape_chars);

    if (buf == NULL)
    {
      vim_free(*file);
      *file = NULL;
      return FAIL;
    }

#ifdef BACKSLASH_IN_FILENAME
    /* For MS-Windows et al. we don't double backslashes at the start and
     * before a file name character. */
    for (var = buf; *var != NUL; mb_ptr_adv(var))
      if (var[0] == '\\' && var[1] == '\\'
            && expand_option_idx >= 0
            && (options[expand_option_idx].flags & P_EXPAND)
            && vim_isfilec(var[2])
            && (var[2] != '\\' || (var == buf && var[4] != '\\')))
          STRMOVE(var, var + 1);
#endif

    *file[0] = buf;
    *num_file = 1;
    return OK;
}
#endif

/*
 * Get the value for the numeric or string option *opp in a nice format into
 * NameBuff[].  Must not be called with a hidden option!
 */
    static void
option_value2string(opp, opt_flags)
    struct vimoption    *opp;
    int                 opt_flags;  /* OPT_GLOBAL and/or OPT_LOCAL */
{
    char_u  *varp;

    varp = get_varp_scope(opp, opt_flags);

    if (opp->flags & P_NUM)
    {
      long wc = 0;

      if (wc_use_keyname(varp, &wc))
          STRCPY(NameBuff, get_special_key_name((int)wc, 0));
      else if (wc != 0)
          STRCPY(NameBuff, transchar((int)wc));
      else
          sprintf((char *)NameBuff, "%ld", *(long *)varp);
    }
    else    /* P_STRING */
    {
      varp = *(char_u **)(varp);
      if (varp == NULL)           /* just in case */
          NameBuff[0] = NUL;
#ifdef FEAT_CRYPT
      /* don't show the actual value of 'key', only that it's set */
      else if (opp->var == (char_u *)&p_key && *varp)
          STRCPY(NameBuff, "*****");
#endif
      else if (opp->flags & P_EXPAND)
          home_replace(NULL, varp, NameBuff, MAXPATHL, FALSE);
      /* Translate 'pastetoggle' into special key names */
      else if ((char_u **)opp->var == &p_pt)
          str2specialbuf(p_pt, NameBuff, MAXPATHL);
      else
          vim_strncpy(NameBuff, varp, MAXPATHL - 1);
    }
}

/*
 * Return TRUE if "varp" points to 'wildchar' or 'wildcharm' and it can be
 * printed as a keyname.
 * "*wcp" is set to the value of the option if it's 'wildchar' or 'wildcharm'.
 */
    static int
wc_use_keyname(varp, wcp)
    char_u  *varp;
    long    *wcp;
{
    if (((long *)varp == &p_wc) || ((long *)varp == &p_wcm))
    {
      *wcp = *(long *)varp;
      if (IS_SPECIAL(*wcp) || find_special_key_in_table((int)*wcp) >= 0)
          return TRUE;
    }
    return FALSE;
}

#ifdef FEAT_LANGMAP
/*
 * Any character has an equivalent 'langmap' character.  This is used for
 * keyboards that have a special language mode that sends characters above
 * 128 (although other characters can be translated too).  The "to" field is a
 * Vim command character.  This avoids having to switch the keyboard back to
 * ASCII mode when leaving Insert mode.
 *
 * langmap_mapchar[] maps any of 256 chars to an ASCII char used for Vim
 * commands.
 * When FEAT_MBYTE is defined langmap_mapga.ga_data is a sorted table of
 * langmap_entry_T.  This does the same as langmap_mapchar[] for characters >=
 * 256.
 */
# ifdef FEAT_MBYTE
/*
 * With multi-byte support use growarray for 'langmap' chars >= 256
 */
typedef struct
{
    int         from;
    int     to;
} langmap_entry_T;

static garray_T langmap_mapga;
static void langmap_set_entry __ARGS((int from, int to));

/*
 * Search for an entry in "langmap_mapga" for "from".  If found set the "to"
 * field.  If not found insert a new entry at the appropriate location.
 */
    static void
langmap_set_entry(from, to)
    int    from;
    int    to;
{
    langmap_entry_T *entries = (langmap_entry_T *)(langmap_mapga.ga_data);
    int             a = 0;
    int             b = langmap_mapga.ga_len;

    /* Do a binary search for an existing entry. */
    while (a != b)
    {
      int i = (a + b) / 2;
      int d = entries[i].from - from;

      if (d == 0)
      {
          entries[i].to = to;
          return;
      }
      if (d < 0)
          a = i + 1;
      else
          b = i;
    }

    if (ga_grow(&langmap_mapga, 1) != OK)
      return;  /* out of memory */

    /* insert new entry at position "a" */
    entries = (langmap_entry_T *)(langmap_mapga.ga_data) + a;
    mch_memmove(entries + 1, entries,
                  (langmap_mapga.ga_len - a) * sizeof(langmap_entry_T));
    ++langmap_mapga.ga_len;
    entries[0].from = from;
    entries[0].to = to;
}

/*
 * Apply 'langmap' to multi-byte character "c" and return the result.
 */
    int
langmap_adjust_mb(c)
    int c;
{
    langmap_entry_T *entries = (langmap_entry_T *)(langmap_mapga.ga_data);
    int a = 0;
    int b = langmap_mapga.ga_len;

    while (a != b)
    {
      int i = (a + b) / 2;
      int d = entries[i].from - c;

      if (d == 0)
          return entries[i].to;  /* found matching entry */
      if (d < 0)
          a = i + 1;
      else
          b = i;
    }
    return c;  /* no entry found, return "c" unmodified */
}
# endif

    static void
langmap_init()
{
    int i;

    for (i = 0; i < 256; i++)
      langmap_mapchar[i] = i;  /* we init with a one-to-one map */
# ifdef FEAT_MBYTE
    ga_init2(&langmap_mapga, sizeof(langmap_entry_T), 8);
# endif
}

/*
 * Called when langmap option is set; the language map can be
 * changed at any time!
 */
    static void
langmap_set()
{
    char_u  *p;
    char_u  *p2;
    int         from=NUL, to=NUL;

#ifdef FEAT_MBYTE
    ga_clear(&langmap_mapga);           /* clear the previous map first */
#endif
    langmap_init();                     /* back to one-to-one map */

    for (p = p_langmap; p[0] != NUL; )
    {
      for (p2 = p; p2[0] != NUL && p2[0] != ',' && p2[0] != ';';
                                                 mb_ptr_adv(p2))
      {
          if (p2[0] == '\\' && p2[1] != NUL)
            ++p2;
      }
      if (p2[0] == ';')
          ++p2;       /* abcd;ABCD form, p2 points to A */
      else
          p2 = NULL;        /* aAbBcCdD form, p2 is NULL */
      while (p[0])
      {
          if (p[0] == ',')
          {
            ++p;
            break;
          }
          if (p[0] == '\\' && p[1] != NUL)
            ++p;
#ifdef FEAT_MBYTE
          from = (*mb_ptr2char)(p);
#else
          from = p[0];
#endif
          if (p2 == NULL)
          {
            mb_ptr_adv(p);
            if (p[0] != ',')
            {
                if (p[0] == '\\')
                  ++p;
#ifdef FEAT_MBYTE
                to = (*mb_ptr2char)(p);
#else
                to = p[0];
#endif
            }
          }
          else
          {
            if (p2[0] != ',')
            {
                if (p2[0] == '\\')
                  ++p2;
#ifdef FEAT_MBYTE
                to = (*mb_ptr2char)(p2);
#else
                to = p2[0];
#endif
            }
          }
          if (to == NUL)
          {
            EMSG2(_("E357: 'langmap': Matching character missing for %s"),
                                               transchar(from));
            return;
          }

#ifdef FEAT_MBYTE
          if (from >= 256)
            langmap_set_entry(from, to);
          else
#endif
            langmap_mapchar[from & 255] = to;

          /* Advance to next pair */
          mb_ptr_adv(p);
          if (p2 == NULL)
          {
            if (p[0] == ',')
            {
                ++p;
                break;
            }
          }
          else
          {
            mb_ptr_adv(p2);
            if (*p == ';')
            {
                p = p2;
                if (p[0] != NUL)
                {
                  if (p[0] != ',')
                  {
                      EMSG2(_("E358: 'langmap': Extra characters after semicolon: %s"), p);
                      return;
                  }
                  ++p;
                }
                break;
            }
          }
      }
    }
}
#endif

/*
 * Return TRUE if format option 'x' is in effect.
 * Take care of no formatting when 'paste' is set.
 */
    int
has_format_option(x)
    int           x;
{
    if (p_paste)
      return FALSE;
    return (vim_strchr(curbuf->b_p_fo, x) != NULL);
}

/*
 * Return TRUE if "x" is present in 'shortmess' option, or
 * 'shortmess' contains 'a' and "x" is present in SHM_A.
 */
    int
shortmess(x)
    int         x;
{
    return (   vim_strchr(p_shm, x) != NULL
          || (vim_strchr(p_shm, 'a') != NULL
            && vim_strchr((char_u *)SHM_A, x) != NULL));
}

/*
 * paste_option_changed() - Called after p_paste was set or reset.
 */
    static void
paste_option_changed()
{
    static int    old_p_paste = FALSE;
    static int    save_sm = 0;
#ifdef FEAT_CMDL_INFO
    static int    save_ru = 0;
#endif
#ifdef FEAT_RIGHTLEFT
    static int    save_ri = 0;
    static int    save_hkmap = 0;
#endif
    buf_T   *buf;

    if (p_paste)
    {
      /*
       * Paste switched from off to on.
       * Save the current values, so they can be restored later.
       */
      if (!old_p_paste)
      {
          /* save options for each buffer */
          for (buf = firstbuf; buf != NULL; buf = buf->b_next)
          {
            buf->b_p_tw_nopaste = buf->b_p_tw;
            buf->b_p_wm_nopaste = buf->b_p_wm;
            buf->b_p_sts_nopaste = buf->b_p_sts;
            buf->b_p_ai_nopaste = buf->b_p_ai;
          }

          /* save global options */
          save_sm = p_sm;
#ifdef FEAT_CMDL_INFO
          save_ru = p_ru;
#endif
#ifdef FEAT_RIGHTLEFT
          save_ri = p_ri;
          save_hkmap = p_hkmap;
#endif
          /* save global values for local buffer options */
          p_tw_nopaste = p_tw;
          p_wm_nopaste = p_wm;
          p_sts_nopaste = p_sts;
          p_ai_nopaste = p_ai;
      }

      /*
       * Always set the option values, also when 'paste' is set when it is
       * already on.
       */
      /* set options for each buffer */
      for (buf = firstbuf; buf != NULL; buf = buf->b_next)
      {
          buf->b_p_tw = 0;        /* textwidth is 0 */
          buf->b_p_wm = 0;        /* wrapmargin is 0 */
          buf->b_p_sts = 0;       /* softtabstop is 0 */
          buf->b_p_ai = 0;        /* no auto-indent */
      }

      /* set global options */
      p_sm = 0;             /* no showmatch */
#ifdef FEAT_CMDL_INFO
# ifdef FEAT_WINDOWS
      if (p_ru)
          status_redraw_all();    /* redraw to remove the ruler */
# endif
      p_ru = 0;             /* no ruler */
#endif
#ifdef FEAT_RIGHTLEFT
      p_ri = 0;             /* no reverse insert */
      p_hkmap = 0;                /* no Hebrew keyboard */
#endif
      /* set global values for local buffer options */
      p_tw = 0;
      p_wm = 0;
      p_sts = 0;
      p_ai = 0;
    }

    /*
     * Paste switched from on to off: Restore saved values.
     */
    else if (old_p_paste)
    {
      /* restore options for each buffer */
      for (buf = firstbuf; buf != NULL; buf = buf->b_next)
      {
          buf->b_p_tw = buf->b_p_tw_nopaste;
          buf->b_p_wm = buf->b_p_wm_nopaste;
          buf->b_p_sts = buf->b_p_sts_nopaste;
          buf->b_p_ai = buf->b_p_ai_nopaste;
      }

      /* restore global options */
      p_sm = save_sm;
#ifdef FEAT_CMDL_INFO
# ifdef FEAT_WINDOWS
      if (p_ru != save_ru)
          status_redraw_all();    /* redraw to draw the ruler */
# endif
      p_ru = save_ru;
#endif
#ifdef FEAT_RIGHTLEFT
      p_ri = save_ri;
      p_hkmap = save_hkmap;
#endif
      /* set global values for local buffer options */
      p_tw = p_tw_nopaste;
      p_wm = p_wm_nopaste;
      p_sts = p_sts_nopaste;
      p_ai = p_ai_nopaste;
    }

    old_p_paste = p_paste;
}

/*
 * vimrc_found() - Called when a ".vimrc" or "VIMINIT" has been found.
 *
 * Reset 'compatible' and set the values for options that didn't get set yet
 * to the Vim defaults.
 * Don't do this if the 'compatible' option has been set or reset before.
 * When "fname" is not NULL, use it to set $"envname" when it wasn't set yet.
 */
    void
vimrc_found(fname, envname)
    char_u  *fname;
    char_u  *envname;
{
    int           opt_idx;
    int           dofree = FALSE;
    char_u  *p;

    if (!option_was_set((char_u *)"cp"))
    {
      p_cp = FALSE;
      for (opt_idx = 0; !istermoption(&options[opt_idx]); opt_idx++)
          if (!(options[opt_idx].flags & (P_WAS_SET|P_VI_DEF)))
            set_option_default(opt_idx, OPT_FREE, FALSE);
      didset_options();
    }

    if (fname != NULL)
    {
      p = vim_getenv(envname, &dofree);
      if (p == NULL)
      {
          /* Set $MYVIMRC to the first vimrc file found. */
          p = FullName_save(fname, FALSE);
          if (p != NULL)
          {
            vim_setenv(envname, p);
            vim_free(p);
          }
      }
      else if (dofree)
          vim_free(p);
    }
}

/*
 * Set 'compatible' on or off.  Called for "-C" and "-N" command line arg.
 */
    void
change_compatible(on)
    int         on;
{
    int         opt_idx;

    if (p_cp != on)
    {
      p_cp = on;
      compatible_set();
    }
    opt_idx = findoption((char_u *)"cp");
    if (opt_idx >= 0)
      options[opt_idx].flags |= P_WAS_SET;
}

/*
 * Return TRUE when option "name" has been set.
 */
    int
option_was_set(name)
    char_u  *name;
{
    int idx;

    idx = findoption(name);
    if (idx < 0)  /* unknown option */
      return FALSE;
    if (options[idx].flags & P_WAS_SET)
      return TRUE;
    return FALSE;
}

/*
 * compatible_set() - Called when 'compatible' has been set or unset.
 *
 * When 'compatible' set: Set all relevant options (those that have the P_VIM)
 * flag) to a Vi compatible value.
 * When 'compatible' is unset: Set all options that have a different default
 * for Vim (without the P_VI_DEF flag) to that default.
 */
    static void
compatible_set()
{
    int         opt_idx;

    for (opt_idx = 0; !istermoption(&options[opt_idx]); opt_idx++)
      if (     ((options[opt_idx].flags & P_VIM) && p_cp)
            || (!(options[opt_idx].flags & P_VI_DEF) && !p_cp))
          set_option_default(opt_idx, OPT_FREE, p_cp);
    didset_options();
}

#ifdef FEAT_LINEBREAK

# if defined(__BORLANDC__) && (__BORLANDC__ < 0x500)
   /* Borland C++ screws up loop optimisation here (negri) */
  #pragma option -O-l
# endif

/*
 * fill_breakat_flags() -- called when 'breakat' changes value.
 */
    static void
fill_breakat_flags()
{
    char_u  *p;
    int           i;

    for (i = 0; i < 256; i++)
      breakat_flags[i] = FALSE;

    if (p_breakat != NULL)
      for (p = p_breakat; *p; p++)
          breakat_flags[*p] = TRUE;
}

# if defined(__BORLANDC__) && (__BORLANDC__ < 0x500)
  #pragma option -O.l
# endif

#endif

/*
 * Check an option that can be a range of string values.
 *
 * Return OK for correct value, FAIL otherwise.
 * Empty is always OK.
 */
    static int
check_opt_strings(val, values, list)
    char_u  *val;
    char    **values;
    int           list;     /* when TRUE: accept a list of values */
{
    return opt_strings_flags(val, values, NULL, list);
}

/*
 * Handle an option that can be a range of string values.
 * Set a flag in "*flagp" for each string present.
 *
 * Return OK for correct value, FAIL otherwise.
 * Empty is always OK.
 */
    static int
opt_strings_flags(val, values, flagp, list)
    char_u  *val;       /* new value */
    char    **values;   /* array of valid string values */
    unsigned      *flagp;
    int           list;       /* when TRUE: accept a list of values */
{
    int           i;
    int           len;
    unsigned      new_flags = 0;

    while (*val)
    {
      for (i = 0; ; ++i)
      {
          if (values[i] == NULL)    /* val not found in values[] */
            return FAIL;

          len = (int)STRLEN(values[i]);
          if (STRNCMP(values[i], val, len) == 0
                && ((list && val[len] == ',') || val[len] == NUL))
          {
            val += len + (val[len] == ',');
            new_flags |= (1 << i);
            break;            /* check next item in val list */
          }
      }
    }
    if (flagp != NULL)
      *flagp = new_flags;

    return OK;
}

/*
 * Read the 'wildmode' option, fill wim_flags[].
 */
    static int
check_opt_wim()
{
    char_u  new_wim_flags[4];
    char_u  *p;
    int           i;
    int           idx = 0;

    for (i = 0; i < 4; ++i)
      new_wim_flags[i] = 0;

    for (p = p_wim; *p; ++p)
    {
      for (i = 0; ASCII_ISALPHA(p[i]); ++i)
          ;
      if (p[i] != NUL && p[i] != ',' && p[i] != ':')
          return FAIL;
      if (i == 7 && STRNCMP(p, "longest", 7) == 0)
          new_wim_flags[idx] |= WIM_LONGEST;
      else if (i == 4 && STRNCMP(p, "full", 4) == 0)
          new_wim_flags[idx] |= WIM_FULL;
      else if (i == 4 && STRNCMP(p, "list", 4) == 0)
          new_wim_flags[idx] |= WIM_LIST;
      else
          return FAIL;
      p += i;
      if (*p == NUL)
          break;
      if (*p == ',')
      {
          if (idx == 3)
            return FAIL;
          ++idx;
      }
    }

    /* fill remaining entries with last flag */
    while (idx < 3)
    {
      new_wim_flags[idx + 1] = new_wim_flags[idx];
      ++idx;
    }

    /* only when there are no errors, wim_flags[] is changed */
    for (i = 0; i < 4; ++i)
      wim_flags[i] = new_wim_flags[i];
    return OK;
}

/*
 * Check if backspacing over something is allowed.
 */
    int
can_bs(what)
    int           what;     /* BS_INDENT, BS_EOL or BS_START */
{
    switch (*p_bs)
    {
      case '2':   return TRUE;
      case '1':   return (what != BS_START);
      case '0':   return FALSE;
    }
    return vim_strchr(p_bs, what) != NULL;
}

/*
 * Save the current values of 'fileformat' and 'fileencoding', so that we know
 * the file must be considered changed when the value is different.
 */
    void
save_file_ff(buf)
    buf_T   *buf;
{
    buf->b_start_ffc = *buf->b_p_ff;
    buf->b_start_eol = buf->b_p_eol;
#ifdef FEAT_MBYTE
    buf->b_start_bomb = buf->b_p_bomb;

    /* Only use free/alloc when necessary, they take time. */
    if (buf->b_start_fenc == NULL
                       || STRCMP(buf->b_start_fenc, buf->b_p_fenc) != 0)
    {
      vim_free(buf->b_start_fenc);
      buf->b_start_fenc = vim_strsave(buf->b_p_fenc);
    }
#endif
}

/*
 * Return TRUE if 'fileformat' and/or 'fileencoding' has a different value
 * from when editing started (save_file_ff() called).
 * Also when 'endofline' was changed and 'binary' is set, or when 'bomb' was
 * changed and 'binary' is not set.
 * Don't consider a new, empty buffer to be changed.
 */
    int
file_ff_differs(buf)
    buf_T   *buf;
{
    /* In a buffer that was never loaded the options are not valid. */
    if (buf->b_flags & BF_NEVERLOADED)
      return FALSE;
    if ((buf->b_flags & BF_NEW)
          && buf->b_ml.ml_line_count == 1
          && *ml_get_buf(buf, (linenr_T)1, FALSE) == NUL)
      return FALSE;
    if (buf->b_start_ffc != *buf->b_p_ff)
      return TRUE;
    if (buf->b_p_bin && buf->b_start_eol != buf->b_p_eol)
      return TRUE;
#ifdef FEAT_MBYTE
    if (!buf->b_p_bin && buf->b_start_bomb != buf->b_p_bomb)
      return TRUE;
    if (buf->b_start_fenc == NULL)
      return (*buf->b_p_fenc != NUL);
    return (STRCMP(buf->b_start_fenc, buf->b_p_fenc) != 0);
#else
    return FALSE;
#endif
}

/*
 * return OK if "p" is a valid fileformat name, FAIL otherwise.
 */
    int
check_ff_value(p)
    char_u  *p;
{
    return check_opt_strings(p, p_ff_values, FALSE);
}

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