Merge branch 'vim'

[MacVim.git] / src / ex_cmds2.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.
 */

/*
 * ex_cmds2.c: some more functions for command line commands
 */

#if defined(MSDOS) || defined(WIN16) || defined(WIN32) || defined(_WIN64)
# include "vimio.h"     /* for mch_open(), must be before vim.h */
#endif

#include "vim.h"
#include "version.h"

static void     cmd_source __ARGS((char_u *fname, exarg_T *eap));

#ifdef FEAT_EVAL
/* Growarray to store info about already sourced scripts.
 * For Unix also store the dev/ino, so that we don't have to stat() each
 * script when going through the list. */
typedef struct scriptitem_S
{
    char_u      *sn_name;
# ifdef UNIX
    int         sn_dev_valid;
    dev_t       sn_dev;
    ino_t       sn_ino;
# endif
# ifdef FEAT_PROFILE
    int         sn_prof_on;     /* TRUE when script is/was profiled */
    int         sn_pr_force;    /* forceit: profile functions in this script */
    proftime_T  sn_pr_child;    /* time set when going into first child */
    int         sn_pr_nest;     /* nesting for sn_pr_child */
    /* profiling the script as a whole */
    int         sn_pr_count;    /* nr of times sourced */
    proftime_T  sn_pr_total;    /* time spent in script + children */
    proftime_T  sn_pr_self;     /* time spent in script itself */
    proftime_T  sn_pr_start;    /* time at script start */
    proftime_T  sn_pr_children; /* time in children after script start */
    /* profiling the script per line */
    garray_T    sn_prl_ga;      /* things stored for every line */
    proftime_T  sn_prl_start;   /* start time for current line */
    proftime_T  sn_prl_children; /* time spent in children for this line */
    proftime_T  sn_prl_wait;    /* wait start time for current line */
    int         sn_prl_idx;     /* index of line being timed; -1 if none */
    int         sn_prl_execed;  /* line being timed was executed */
# endif
} scriptitem_T;

static garray_T script_items = {0, 0, sizeof(scriptitem_T), 4, NULL};
#define SCRIPT_ITEM(id) (((scriptitem_T *)script_items.ga_data)[(id) - 1])

# ifdef FEAT_PROFILE
/* Struct used in sn_prl_ga for every line of a script. */
typedef struct sn_prl_S
{
    int         snp_count;      /* nr of times line was executed */
    proftime_T  sn_prl_total;   /* time spent in a line + children */
    proftime_T  sn_prl_self;    /* time spent in a line itself */
} sn_prl_T;

#  define PRL_ITEM(si, idx)     (((sn_prl_T *)(si)->sn_prl_ga.ga_data)[(idx)])
# endif
#endif

#if defined(FEAT_EVAL) || defined(PROTO)
static int debug_greedy = FALSE;        /* batch mode debugging: don't save
                                           and restore typeahead. */

/*
 * do_debug(): Debug mode.
 * Repeatedly get Ex commands, until told to continue normal execution.
 */
    void
do_debug(cmd)
    char_u      *cmd;
{
    int         save_msg_scroll = msg_scroll;
    int         save_State = State;
    int         save_did_emsg = did_emsg;
    int         save_cmd_silent = cmd_silent;
    int         save_msg_silent = msg_silent;
    int         save_emsg_silent = emsg_silent;
    int         save_redir_off = redir_off;
    tasave_T    typeaheadbuf;
    int         typeahead_saved = FALSE;
    int         save_ignore_script = 0;
# ifdef FEAT_EX_EXTRA
    int         save_ex_normal_busy;
# endif
    int         n;
    char_u      *cmdline = NULL;
    char_u      *p;
    char        *tail = NULL;
    static int  last_cmd = 0;
#define CMD_CONT        1
#define CMD_NEXT        2
#define CMD_STEP        3
#define CMD_FINISH      4
#define CMD_QUIT        5
#define CMD_INTERRUPT   6

#ifdef ALWAYS_USE_GUI
    /* Can't do this when there is no terminal for input/output. */
    if (!gui.in_use)
    {
        /* Break as soon as possible. */
        debug_break_level = 9999;
        return;
    }
#endif

    /* Make sure we are in raw mode and start termcap mode.  Might have side
     * effects... */
    settmode(TMODE_RAW);
    starttermcap();

    ++RedrawingDisabled;        /* don't redisplay the window */
    ++no_wait_return;           /* don't wait for return */
    did_emsg = FALSE;           /* don't use error from debugged stuff */
    cmd_silent = FALSE;         /* display commands */
    msg_silent = FALSE;         /* display messages */
    emsg_silent = FALSE;        /* display error messages */
    redir_off = TRUE;           /* don't redirect debug commands */

    State = NORMAL;
#ifdef FEAT_SNIFF
    want_sniff_request = 0;    /* No K_SNIFF wanted */
#endif

    if (!debug_did_msg)
        MSG(_("Entering Debug mode.  Type \"cont\" to continue."));
    if (sourcing_name != NULL)
        msg(sourcing_name);
    if (sourcing_lnum != 0)
        smsg((char_u *)_("line %ld: %s"), (long)sourcing_lnum, cmd);
    else
        smsg((char_u *)_("cmd: %s"), cmd);

    /*
     * Repeat getting a command and executing it.
     */
    for (;;)
    {
        msg_scroll = TRUE;
        need_wait_return = FALSE;
#ifdef FEAT_SNIFF
        ProcessSniffRequests();
#endif
        /* Save the current typeahead buffer and replace it with an empty one.
         * This makes sure we get input from the user here and don't interfere
         * with the commands being executed.  Reset "ex_normal_busy" to avoid
         * the side effects of using ":normal". Save the stuff buffer and make
         * it empty. Set ignore_script to avoid reading from script input. */
# ifdef FEAT_EX_EXTRA
        save_ex_normal_busy = ex_normal_busy;
        ex_normal_busy = 0;
# endif
        if (!debug_greedy)
        {
            save_typeahead(&typeaheadbuf);
            typeahead_saved = TRUE;
            save_ignore_script = ignore_script;
            ignore_script = TRUE;
        }

        cmdline = getcmdline_prompt('>', NULL, 0, EXPAND_NOTHING, NULL);

        if (typeahead_saved)
        {
            restore_typeahead(&typeaheadbuf);
            ignore_script = save_ignore_script;
        }
# ifdef FEAT_EX_EXTRA
        ex_normal_busy = save_ex_normal_busy;
# endif

        cmdline_row = msg_row;
        if (cmdline != NULL)
        {
            /* If this is a debug command, set "last_cmd".
             * If not, reset "last_cmd".
             * For a blank line use previous command. */
            p = skipwhite(cmdline);
            if (*p != NUL)
            {
                switch (*p)
                {
                    case 'c': last_cmd = CMD_CONT;
                              tail = "ont";
                              break;
                    case 'n': last_cmd = CMD_NEXT;
                              tail = "ext";
                              break;
                    case 's': last_cmd = CMD_STEP;
                              tail = "tep";
                              break;
                    case 'f': last_cmd = CMD_FINISH;
                              tail = "inish";
                              break;
                    case 'q': last_cmd = CMD_QUIT;
                              tail = "uit";
                              break;
                    case 'i': last_cmd = CMD_INTERRUPT;
                              tail = "nterrupt";
                              break;
                    default: last_cmd = 0;
                }
                if (last_cmd != 0)
                {
                    /* Check that the tail matches. */
                    ++p;
                    while (*p != NUL && *p == *tail)
                    {
                        ++p;
                        ++tail;
                    }
                    if (ASCII_ISALPHA(*p))
                        last_cmd = 0;
                }
            }

            if (last_cmd != 0)
            {
                /* Execute debug command: decided where to break next and
                 * return. */
                switch (last_cmd)
                {
                    case CMD_CONT:
                        debug_break_level = -1;
                        break;
                    case CMD_NEXT:
                        debug_break_level = ex_nesting_level;
                        break;
                    case CMD_STEP:
                        debug_break_level = 9999;
                        break;
                    case CMD_FINISH:
                        debug_break_level = ex_nesting_level - 1;
                        break;
                    case CMD_QUIT:
                        got_int = TRUE;
                        debug_break_level = -1;
                        break;
                    case CMD_INTERRUPT:
                        got_int = TRUE;
                        debug_break_level = 9999;
                        /* Do not repeat ">interrupt" cmd, continue stepping. */
                        last_cmd = CMD_STEP;
                        break;
                }
                break;
            }

            /* don't debug this command */
            n = debug_break_level;
            debug_break_level = -1;
            (void)do_cmdline(cmdline, getexline, NULL,
                                                DOCMD_VERBOSE|DOCMD_EXCRESET);
            debug_break_level = n;

            vim_free(cmdline);
        }
        lines_left = Rows - 1;
    }
    vim_free(cmdline);

    --RedrawingDisabled;
    --no_wait_return;
    redraw_all_later(NOT_VALID);
    need_wait_return = FALSE;
    msg_scroll = save_msg_scroll;
    lines_left = Rows - 1;
    State = save_State;
    did_emsg = save_did_emsg;
    cmd_silent = save_cmd_silent;
    msg_silent = save_msg_silent;
    emsg_silent = save_emsg_silent;
    redir_off = save_redir_off;

    /* Only print the message again when typing a command before coming back
     * here. */
    debug_did_msg = TRUE;
}

/*
 * ":debug".
 */
    void
ex_debug(eap)
    exarg_T     *eap;
{
    int         debug_break_level_save = debug_break_level;

    debug_break_level = 9999;
    do_cmdline_cmd(eap->arg);
    debug_break_level = debug_break_level_save;
}

static char_u   *debug_breakpoint_name = NULL;
static linenr_T debug_breakpoint_lnum;

/*
 * When debugging or a breakpoint is set on a skipped command, no debug prompt
 * is shown by do_one_cmd().  This situation is indicated by debug_skipped, and
 * debug_skipped_name is then set to the source name in the breakpoint case.  If
 * a skipped command decides itself that a debug prompt should be displayed, it
 * can do so by calling dbg_check_skipped().
 */
static int      debug_skipped;
static char_u   *debug_skipped_name;

/*
 * Go to debug mode when a breakpoint was encountered or "ex_nesting_level" is
 * at or below the break level.  But only when the line is actually
 * executed.  Return TRUE and set breakpoint_name for skipped commands that
 * decide to execute something themselves.
 * Called from do_one_cmd() before executing a command.
 */
    void
dbg_check_breakpoint(eap)
    exarg_T     *eap;
{
    char_u      *p;

    debug_skipped = FALSE;
    if (debug_breakpoint_name != NULL)
    {
        if (!eap->skip)
        {
            /* replace K_SNR with "<SNR>" */
            if (debug_breakpoint_name[0] == K_SPECIAL
                    && debug_breakpoint_name[1] == KS_EXTRA
                    && debug_breakpoint_name[2] == (int)KE_SNR)
                p = (char_u *)"<SNR>";
            else
                p = (char_u *)"";
            smsg((char_u *)_("Breakpoint in \"%s%s\" line %ld"),
                    p,
                    debug_breakpoint_name + (*p == NUL ? 0 : 3),
                    (long)debug_breakpoint_lnum);
            debug_breakpoint_name = NULL;
            do_debug(eap->cmd);
        }
        else
        {
            debug_skipped = TRUE;
            debug_skipped_name = debug_breakpoint_name;
            debug_breakpoint_name = NULL;
        }
    }
    else if (ex_nesting_level <= debug_break_level)
    {
        if (!eap->skip)
            do_debug(eap->cmd);
        else
        {
            debug_skipped = TRUE;
            debug_skipped_name = NULL;
        }
    }
}

/*
 * Go to debug mode if skipped by dbg_check_breakpoint() because eap->skip was
 * set.  Return TRUE when the debug mode is entered this time.
 */
    int
dbg_check_skipped(eap)
    exarg_T     *eap;
{
    int         prev_got_int;

    if (debug_skipped)
    {
        /*
         * Save the value of got_int and reset it.  We don't want a previous
         * interruption cause flushing the input buffer.
         */
        prev_got_int = got_int;
        got_int = FALSE;
        debug_breakpoint_name = debug_skipped_name;
        /* eap->skip is TRUE */
        eap->skip = FALSE;
        (void)dbg_check_breakpoint(eap);
        eap->skip = TRUE;
        got_int |= prev_got_int;
        return TRUE;
    }
    return FALSE;
}

/*
 * The list of breakpoints: dbg_breakp.
 * This is a grow-array of structs.
 */
struct debuggy
{
    int         dbg_nr;         /* breakpoint number */
    int         dbg_type;       /* DBG_FUNC or DBG_FILE */
    char_u      *dbg_name;      /* function or file name */
    regprog_T   *dbg_prog;      /* regexp program */
    linenr_T    dbg_lnum;       /* line number in function or file */
    int         dbg_forceit;    /* ! used */
};

static garray_T dbg_breakp = {0, 0, sizeof(struct debuggy), 4, NULL};
#define BREAKP(idx)             (((struct debuggy *)dbg_breakp.ga_data)[idx])
#define DEBUGGY(gap, idx)       (((struct debuggy *)gap->ga_data)[idx])
static int last_breakp = 0;     /* nr of last defined breakpoint */

#ifdef FEAT_PROFILE
/* Profiling uses file and func names similar to breakpoints. */
static garray_T prof_ga = {0, 0, sizeof(struct debuggy), 4, NULL};
#endif
#define DBG_FUNC        1
#define DBG_FILE        2

static int dbg_parsearg __ARGS((char_u *arg, garray_T *gap));
static linenr_T debuggy_find __ARGS((int file,char_u *fname, linenr_T after, garray_T *gap, int *fp));

/*
 * Parse the arguments of ":profile", ":breakadd" or ":breakdel" and put them
 * in the entry just after the last one in dbg_breakp.  Note that "dbg_name"
 * is allocated.
 * Returns FAIL for failure.
 */
    static int
dbg_parsearg(arg, gap)
    char_u      *arg;
    garray_T    *gap;       /* either &dbg_breakp or &prof_ga */
{
    char_u      *p = arg;
    char_u      *q;
    struct debuggy *bp;
    int         here = FALSE;

    if (ga_grow(gap, 1) == FAIL)
        return FAIL;
    bp = &DEBUGGY(gap, gap->ga_len);

    /* Find "func" or "file". */
    if (STRNCMP(p, "func", 4) == 0)
        bp->dbg_type = DBG_FUNC;
    else if (STRNCMP(p, "file", 4) == 0)
        bp->dbg_type = DBG_FILE;
    else if (
#ifdef FEAT_PROFILE
            gap != &prof_ga &&
#endif
            STRNCMP(p, "here", 4) == 0)
    {
        if (curbuf->b_ffname == NULL)
        {
            EMSG(_(e_noname));
            return FAIL;
        }
        bp->dbg_type = DBG_FILE;
        here = TRUE;
    }
    else
    {
        EMSG2(_(e_invarg2), p);
        return FAIL;
    }
    p = skipwhite(p + 4);

    /* Find optional line number. */
    if (here)
        bp->dbg_lnum = curwin->w_cursor.lnum;
    else if (
#ifdef FEAT_PROFILE
            gap != &prof_ga &&
#endif
            VIM_ISDIGIT(*p))
    {
        bp->dbg_lnum = getdigits(&p);
        p = skipwhite(p);
    }
    else
        bp->dbg_lnum = 0;

    /* Find the function or file name.  Don't accept a function name with (). */
    if ((!here && *p == NUL)
            || (here && *p != NUL)
            || (bp->dbg_type == DBG_FUNC && strstr((char *)p, "()") != NULL))
    {
        EMSG2(_(e_invarg2), arg);
        return FAIL;
    }

    if (bp->dbg_type == DBG_FUNC)
        bp->dbg_name = vim_strsave(p);
    else if (here)
        bp->dbg_name = vim_strsave(curbuf->b_ffname);
    else
    {
        /* Expand the file name in the same way as do_source().  This means
         * doing it twice, so that $DIR/file gets expanded when $DIR is
         * "~/dir". */
#ifdef RISCOS
        q = mch_munge_fname(p);
#else
        q = expand_env_save(p);
#endif
        if (q == NULL)
            return FAIL;
#ifdef RISCOS
        p = mch_munge_fname(q);
#else
        p = expand_env_save(q);
#endif
        vim_free(q);
        if (p == NULL)
            return FAIL;
        if (*p != '*')
        {
            bp->dbg_name = fix_fname(p);
            vim_free(p);
        }
        else
            bp->dbg_name = p;
    }

    if (bp->dbg_name == NULL)
        return FAIL;
    return OK;
}

/*
 * ":breakadd".
 */
    void
ex_breakadd(eap)
    exarg_T     *eap;
{
    struct debuggy *bp;
    char_u      *pat;
    garray_T    *gap;

    gap = &dbg_breakp;
#ifdef FEAT_PROFILE
    if (eap->cmdidx == CMD_profile)
        gap = &prof_ga;
#endif

    if (dbg_parsearg(eap->arg, gap) == OK)
    {
        bp = &DEBUGGY(gap, gap->ga_len);
        bp->dbg_forceit = eap->forceit;

        pat = file_pat_to_reg_pat(bp->dbg_name, NULL, NULL, FALSE);
        if (pat != NULL)
        {
            bp->dbg_prog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
            vim_free(pat);
        }
        if (pat == NULL || bp->dbg_prog == NULL)
            vim_free(bp->dbg_name);
        else
        {
            if (bp->dbg_lnum == 0)      /* default line number is 1 */
                bp->dbg_lnum = 1;
#ifdef FEAT_PROFILE
            if (eap->cmdidx != CMD_profile)
#endif
            {
                DEBUGGY(gap, gap->ga_len).dbg_nr = ++last_breakp;
                ++debug_tick;
            }
            ++gap->ga_len;
        }
    }
}

/*
 * ":debuggreedy".
 */
    void
ex_debuggreedy(eap)
    exarg_T     *eap;
{
    if (eap->addr_count == 0 || eap->line2 != 0)
        debug_greedy = TRUE;
    else
        debug_greedy = FALSE;
}

/*
 * ":breakdel" and ":profdel".
 */
    void
ex_breakdel(eap)
    exarg_T     *eap;
{
    struct debuggy *bp, *bpi;
    int         nr;
    int         todel = -1;
    int         del_all = FALSE;
    int         i;
    linenr_T    best_lnum = 0;
    garray_T    *gap;

    gap = &dbg_breakp;
#ifdef FEAT_PROFILE
    if (eap->cmdidx == CMD_profdel)
        gap = &prof_ga;
#endif

    if (vim_isdigit(*eap->arg))
    {
        /* ":breakdel {nr}" */
        nr = atol((char *)eap->arg);
        for (i = 0; i < gap->ga_len; ++i)
            if (DEBUGGY(gap, i).dbg_nr == nr)
            {
                todel = i;
                break;
            }
    }
    else if (*eap->arg == '*')
    {
        todel = 0;
        del_all = TRUE;
    }
    else
    {
        /* ":breakdel {func|file} [lnum] {name}" */
        if (dbg_parsearg(eap->arg, gap) == FAIL)
            return;
        bp = &DEBUGGY(gap, gap->ga_len);
        for (i = 0; i < gap->ga_len; ++i)
        {
            bpi = &DEBUGGY(gap, i);
            if (bp->dbg_type == bpi->dbg_type
                    && STRCMP(bp->dbg_name, bpi->dbg_name) == 0
                    && (bp->dbg_lnum == bpi->dbg_lnum
                        || (bp->dbg_lnum == 0
                            && (best_lnum == 0
                                || bpi->dbg_lnum < best_lnum))))
            {
                todel = i;
                best_lnum = bpi->dbg_lnum;
            }
        }
        vim_free(bp->dbg_name);
    }

    if (todel < 0)
        EMSG2(_("E161: Breakpoint not found: %s"), eap->arg);
    else
    {
        while (gap->ga_len > 0)
        {
            vim_free(DEBUGGY(gap, todel).dbg_name);
            vim_free(DEBUGGY(gap, todel).dbg_prog);
            --gap->ga_len;
            if (todel < gap->ga_len)
                mch_memmove(&DEBUGGY(gap, todel), &DEBUGGY(gap, todel + 1),
                              (gap->ga_len - todel) * sizeof(struct debuggy));
#ifdef FEAT_PROFILE
            if (eap->cmdidx == CMD_breakdel)
#endif
                ++debug_tick;
            if (!del_all)
                break;
        }

        /* If all breakpoints were removed clear the array. */
        if (gap->ga_len == 0)
            ga_clear(gap);
    }
}

/*
 * ":breaklist".
 */
    void
ex_breaklist(eap)
    exarg_T     *eap UNUSED;
{
    struct debuggy *bp;
    int         i;

    if (dbg_breakp.ga_len == 0)
        MSG(_("No breakpoints defined"));
    else
        for (i = 0; i < dbg_breakp.ga_len; ++i)
        {
            bp = &BREAKP(i);
            smsg((char_u *)_("%3d  %s %s  line %ld"),
                    bp->dbg_nr,
                    bp->dbg_type == DBG_FUNC ? "func" : "file",
                    bp->dbg_name,
                    (long)bp->dbg_lnum);
        }
}

/*
 * Find a breakpoint for a function or sourced file.
 * Returns line number at which to break; zero when no matching breakpoint.
 */
    linenr_T
dbg_find_breakpoint(file, fname, after)
    int         file;       /* TRUE for a file, FALSE for a function */
    char_u      *fname;     /* file or function name */
    linenr_T    after;      /* after this line number */
{
    return debuggy_find(file, fname, after, &dbg_breakp, NULL);
}

#if defined(FEAT_PROFILE) || defined(PROTO)
/*
 * Return TRUE if profiling is on for a function or sourced file.
 */
    int
has_profiling(file, fname, fp)
    int         file;       /* TRUE for a file, FALSE for a function */
    char_u      *fname;     /* file or function name */
    int         *fp;        /* return: forceit */
{
    return (debuggy_find(file, fname, (linenr_T)0, &prof_ga, fp)
                                                              != (linenr_T)0);
}
#endif

/*
 * Common code for dbg_find_breakpoint() and has_profiling().
 */
    static linenr_T
debuggy_find(file, fname, after, gap, fp)
    int         file;       /* TRUE for a file, FALSE for a function */
    char_u      *fname;     /* file or function name */
    linenr_T    after;      /* after this line number */
    garray_T    *gap;       /* either &dbg_breakp or &prof_ga */
    int         *fp;        /* if not NULL: return forceit */
{
    struct debuggy *bp;
    int         i;
    linenr_T    lnum = 0;
    regmatch_T  regmatch;
    char_u      *name = fname;
    int         prev_got_int;

    /* Return quickly when there are no breakpoints. */
    if (gap->ga_len == 0)
        return (linenr_T)0;

    /* Replace K_SNR in function name with "<SNR>". */
    if (!file && fname[0] == K_SPECIAL)
    {
        name = alloc((unsigned)STRLEN(fname) + 3);
        if (name == NULL)
            name = fname;
        else
        {
            STRCPY(name, "<SNR>");
            STRCPY(name + 5, fname + 3);
        }
    }

    for (i = 0; i < gap->ga_len; ++i)
    {
        /* Skip entries that are not useful or are for a line that is beyond
         * an already found breakpoint. */
        bp = &DEBUGGY(gap, i);
        if (((bp->dbg_type == DBG_FILE) == file && (
#ifdef FEAT_PROFILE
                gap == &prof_ga ||
#endif
                (bp->dbg_lnum > after && (lnum == 0 || bp->dbg_lnum < lnum)))))
        {
            regmatch.regprog = bp->dbg_prog;
            regmatch.rm_ic = FALSE;
            /*
             * Save the value of got_int and reset it.  We don't want a
             * previous interruption cancel matching, only hitting CTRL-C
             * while matching should abort it.
             */
            prev_got_int = got_int;
            got_int = FALSE;
            if (vim_regexec(&regmatch, name, (colnr_T)0))
            {
                lnum = bp->dbg_lnum;
                if (fp != NULL)
                    *fp = bp->dbg_forceit;
            }
            got_int |= prev_got_int;
        }
    }
    if (name != fname)
        vim_free(name);

    return lnum;
}

/*
 * Called when a breakpoint was encountered.
 */
    void
dbg_breakpoint(name, lnum)
    char_u      *name;
    linenr_T    lnum;
{
    /* We need to check if this line is actually executed in do_one_cmd() */
    debug_breakpoint_name = name;
    debug_breakpoint_lnum = lnum;
}


# if defined(FEAT_PROFILE) || defined(FEAT_RELTIME) || defined(PROTO)
/*
 * Store the current time in "tm".
 */
    void
profile_start(tm)
    proftime_T *tm;
{
# ifdef WIN3264
    QueryPerformanceCounter(tm);
# else
    gettimeofday(tm, NULL);
# endif
}

/*
 * Compute the elapsed time from "tm" till now and store in "tm".
 */
    void
profile_end(tm)
    proftime_T *tm;
{
    proftime_T now;

# ifdef WIN3264
    QueryPerformanceCounter(&now);
    tm->QuadPart = now.QuadPart - tm->QuadPart;
# else
    gettimeofday(&now, NULL);
    tm->tv_usec = now.tv_usec - tm->tv_usec;
    tm->tv_sec = now.tv_sec - tm->tv_sec;
    if (tm->tv_usec < 0)
    {
        tm->tv_usec += 1000000;
        --tm->tv_sec;
    }
# endif
}

/*
 * Subtract the time "tm2" from "tm".
 */
    void
profile_sub(tm, tm2)
    proftime_T *tm, *tm2;
{
# ifdef WIN3264
    tm->QuadPart -= tm2->QuadPart;
# else
    tm->tv_usec -= tm2->tv_usec;
    tm->tv_sec -= tm2->tv_sec;
    if (tm->tv_usec < 0)
    {
        tm->tv_usec += 1000000;
        --tm->tv_sec;
    }
# endif
}

/*
 * Return a string that represents the time in "tm".
 * Uses a static buffer!
 */
    char *
profile_msg(tm)
    proftime_T *tm;
{
    static char buf[50];

# ifdef WIN3264
    LARGE_INTEGER   fr;

    QueryPerformanceFrequency(&fr);
    sprintf(buf, "%10.6lf", (double)tm->QuadPart / (double)fr.QuadPart);
# else
    sprintf(buf, "%3ld.%06ld", (long)tm->tv_sec, (long)tm->tv_usec);
# endif
    return buf;
}

/*
 * Put the time "msec" past now in "tm".
 */
    void
profile_setlimit(msec, tm)
    long        msec;
    proftime_T  *tm;
{
    if (msec <= 0)   /* no limit */
        profile_zero(tm);
    else
    {
# ifdef WIN3264
        LARGE_INTEGER   fr;

        QueryPerformanceCounter(tm);
        QueryPerformanceFrequency(&fr);
        tm->QuadPart += (LONGLONG)((double)msec / 1000.0 * (double)fr.QuadPart);
# else
        long        usec;

        gettimeofday(tm, NULL);
        usec = (long)tm->tv_usec + (long)msec * 1000;
        tm->tv_usec = usec % 1000000L;
        tm->tv_sec += usec / 1000000L;
# endif
    }
}

/*
 * Return TRUE if the current time is past "tm".
 */
    int
profile_passed_limit(tm)
    proftime_T  *tm;
{
    proftime_T  now;

# ifdef WIN3264
    if (tm->QuadPart == 0)  /* timer was not set */
        return FALSE;
    QueryPerformanceCounter(&now);
    return (now.QuadPart > tm->QuadPart);
# else
    if (tm->tv_sec == 0)    /* timer was not set */
        return FALSE;
    gettimeofday(&now, NULL);
    return (now.tv_sec > tm->tv_sec
            || (now.tv_sec == tm->tv_sec && now.tv_usec > tm->tv_usec));
# endif
}

/*
 * Set the time in "tm" to zero.
 */
    void
profile_zero(tm)
    proftime_T *tm;
{
# ifdef WIN3264
    tm->QuadPart = 0;
# else
    tm->tv_usec = 0;
    tm->tv_sec = 0;
# endif
}

# endif  /* FEAT_PROFILE || FEAT_RELTIME */

# if defined(FEAT_PROFILE) || defined(PROTO)
/*
 * Functions for profiling.
 */
static void script_do_profile __ARGS((scriptitem_T *si));
static void script_dump_profile __ARGS((FILE *fd));
static proftime_T prof_wait_time;

/*
 * Add the time "tm2" to "tm".
 */
    void
profile_add(tm, tm2)
    proftime_T *tm, *tm2;
{
# ifdef WIN3264
    tm->QuadPart += tm2->QuadPart;
# else
    tm->tv_usec += tm2->tv_usec;
    tm->tv_sec += tm2->tv_sec;
    if (tm->tv_usec >= 1000000)
    {
        tm->tv_usec -= 1000000;
        ++tm->tv_sec;
    }
# endif
}

/*
 * Add the "self" time from the total time and the children's time.
 */
    void
profile_self(self, total, children)
    proftime_T *self, *total, *children;
{
    /* Check that the result won't be negative.  Can happen with recursive
     * calls. */
#ifdef WIN3264
    if (total->QuadPart <= children->QuadPart)
        return;
#else
    if (total->tv_sec < children->tv_sec
            || (total->tv_sec == children->tv_sec
                && total->tv_usec <= children->tv_usec))
        return;
#endif
    profile_add(self, total);
    profile_sub(self, children);
}

/*
 * Get the current waittime.
 */
    void
profile_get_wait(tm)
    proftime_T *tm;
{
    *tm = prof_wait_time;
}

/*
 * Subtract the passed waittime since "tm" from "tma".
 */
    void
profile_sub_wait(tm, tma)
    proftime_T *tm, *tma;
{
    proftime_T tm3 = prof_wait_time;

    profile_sub(&tm3, tm);
    profile_sub(tma, &tm3);
}

/*
 * Return TRUE if "tm1" and "tm2" are equal.
 */
    int
profile_equal(tm1, tm2)
    proftime_T *tm1, *tm2;
{
# ifdef WIN3264
    return (tm1->QuadPart == tm2->QuadPart);
# else
    return (tm1->tv_usec == tm2->tv_usec && tm1->tv_sec == tm2->tv_sec);
# endif
}

/*
 * Return <0, 0 or >0 if "tm1" < "tm2", "tm1" == "tm2" or "tm1" > "tm2"
 */
    int
profile_cmp(tm1, tm2)
    proftime_T *tm1, *tm2;
{
# ifdef WIN3264
    return (int)(tm2->QuadPart - tm1->QuadPart);
# else
    if (tm1->tv_sec == tm2->tv_sec)
        return tm2->tv_usec - tm1->tv_usec;
    return tm2->tv_sec - tm1->tv_sec;
# endif
}

static char_u   *profile_fname = NULL;
static proftime_T pause_time;

/*
 * ":profile cmd args"
 */
    void
ex_profile(eap)
    exarg_T     *eap;
{
    char_u      *e;
    int         len;

    e = skiptowhite(eap->arg);
    len = (int)(e - eap->arg);
    e = skipwhite(e);

    if (len == 5 && STRNCMP(eap->arg, "start", 5) == 0 && *e != NUL)
    {
        vim_free(profile_fname);
        profile_fname = vim_strsave(e);
        do_profiling = PROF_YES;
        profile_zero(&prof_wait_time);
        set_vim_var_nr(VV_PROFILING, 1L);
    }
    else if (do_profiling == PROF_NONE)
        EMSG(_("E750: First use \":profile start {fname}\""));
    else if (STRCMP(eap->arg, "pause") == 0)
    {
        if (do_profiling == PROF_YES)
            profile_start(&pause_time);
        do_profiling = PROF_PAUSED;
    }
    else if (STRCMP(eap->arg, "continue") == 0)
    {
        if (do_profiling == PROF_PAUSED)
        {
            profile_end(&pause_time);
            profile_add(&prof_wait_time, &pause_time);
        }
        do_profiling = PROF_YES;
    }
    else
    {
        /* The rest is similar to ":breakadd". */
        ex_breakadd(eap);
    }
}

/* Command line expansion for :profile. */
static enum
{
    PEXP_SUBCMD,        /* expand :profile sub-commands */
    PEXP_FUNC,          /* expand :profile func {funcname} */
} pexpand_what;

static char *pexpand_cmds[] = {
                        "start",
#define PROFCMD_START   0
                        "pause",
#define PROFCMD_PAUSE   1
                        "continue",
#define PROFCMD_CONTINUE 2
                        "func",
#define PROFCMD_FUNC    3
                        "file",
#define PROFCMD_FILE    4
                        NULL
#define PROFCMD_LAST    5
};

/*
 * Function given to ExpandGeneric() to obtain the profile command
 * specific expansion.
 */
    char_u *
get_profile_name(xp, idx)
    expand_T    *xp UNUSED;
    int         idx;
{
    switch (pexpand_what)
    {
    case PEXP_SUBCMD:
        return (char_u *)pexpand_cmds[idx];
    /* case PEXP_FUNC: TODO */
    default:
        return NULL;
    }
}

/*
 * Handle command line completion for :profile command.
 */
    void
set_context_in_profile_cmd(xp, arg)
    expand_T    *xp;
    char_u      *arg;
{
    char_u      *end_subcmd;

    /* Default: expand subcommands. */
    xp->xp_context = EXPAND_PROFILE;
    pexpand_what = PEXP_SUBCMD;
    xp->xp_pattern = arg;

    end_subcmd = skiptowhite(arg);
    if (*end_subcmd == NUL)
        return;

    if (end_subcmd - arg == 5 && STRNCMP(arg, "start", 5) == 0)
    {
        xp->xp_context = EXPAND_FILES;
        xp->xp_pattern = skipwhite(end_subcmd);
        return;
    }

    /* TODO: expand function names after "func" */
    xp->xp_context = EXPAND_NOTHING;
}

/*
 * Dump the profiling info.
 */
    void
profile_dump()
{
    FILE        *fd;

    if (profile_fname != NULL)
    {
        fd = mch_fopen((char *)profile_fname, "w");
        if (fd == NULL)
            EMSG2(_(e_notopen), profile_fname);
        else
        {
            script_dump_profile(fd);
            func_dump_profile(fd);
            fclose(fd);
        }
    }
}

/*
 * Start profiling script "fp".
 */
    static void
script_do_profile(si)
    scriptitem_T    *si;
{
    si->sn_pr_count = 0;
    profile_zero(&si->sn_pr_total);
    profile_zero(&si->sn_pr_self);

    ga_init2(&si->sn_prl_ga, sizeof(sn_prl_T), 100);
    si->sn_prl_idx = -1;
    si->sn_prof_on = TRUE;
    si->sn_pr_nest = 0;
}

/*
 * save time when starting to invoke another script or function.
 */
    void
script_prof_save(tm)
    proftime_T  *tm;        /* place to store wait time */
{
    scriptitem_T    *si;

    if (current_SID > 0 && current_SID <= script_items.ga_len)
    {
        si = &SCRIPT_ITEM(current_SID);
        if (si->sn_prof_on && si->sn_pr_nest++ == 0)
            profile_start(&si->sn_pr_child);
    }
    profile_get_wait(tm);
}

/*
 * Count time spent in children after invoking another script or function.
 */
    void
script_prof_restore(tm)
    proftime_T  *tm;
{
    scriptitem_T    *si;

    if (current_SID > 0 && current_SID <= script_items.ga_len)
    {
        si = &SCRIPT_ITEM(current_SID);
        if (si->sn_prof_on && --si->sn_pr_nest == 0)
        {
            profile_end(&si->sn_pr_child);
            profile_sub_wait(tm, &si->sn_pr_child); /* don't count wait time */
            profile_add(&si->sn_pr_children, &si->sn_pr_child);
            profile_add(&si->sn_prl_children, &si->sn_pr_child);
        }
    }
}

static proftime_T inchar_time;

/*
 * Called when starting to wait for the user to type a character.
 */
    void
prof_inchar_enter()
{
    profile_start(&inchar_time);
}

/*
 * Called when finished waiting for the user to type a character.
 */
    void
prof_inchar_exit()
{
    profile_end(&inchar_time);
    profile_add(&prof_wait_time, &inchar_time);
}

/*
 * Dump the profiling results for all scripts in file "fd".
 */
    static void
script_dump_profile(fd)
    FILE    *fd;
{
    int             id;
    scriptitem_T    *si;
    int             i;
    FILE            *sfd;
    sn_prl_T        *pp;

    for (id = 1; id <= script_items.ga_len; ++id)
    {
        si = &SCRIPT_ITEM(id);
        if (si->sn_prof_on)
        {
            fprintf(fd, "SCRIPT  %s\n", si->sn_name);
            if (si->sn_pr_count == 1)
                fprintf(fd, "Sourced 1 time\n");
            else
                fprintf(fd, "Sourced %d times\n", si->sn_pr_count);
            fprintf(fd, "Total time: %s\n", profile_msg(&si->sn_pr_total));
            fprintf(fd, " Self time: %s\n", profile_msg(&si->sn_pr_self));
            fprintf(fd, "\n");
            fprintf(fd, "count  total (s)   self (s)\n");

            sfd = mch_fopen((char *)si->sn_name, "r");
            if (sfd == NULL)
                fprintf(fd, "Cannot open file!\n");
            else
            {
                for (i = 0; i < si->sn_prl_ga.ga_len; ++i)
                {
                    if (vim_fgets(IObuff, IOSIZE, sfd))
                        break;
                    pp = &PRL_ITEM(si, i);
                    if (pp->snp_count > 0)
                    {
                        fprintf(fd, "%5d ", pp->snp_count);
                        if (profile_equal(&pp->sn_prl_total, &pp->sn_prl_self))
                            fprintf(fd, "           ");
                        else
                            fprintf(fd, "%s ", profile_msg(&pp->sn_prl_total));
                        fprintf(fd, "%s ", profile_msg(&pp->sn_prl_self));
                    }
                    else
                        fprintf(fd, "                            ");
                    fprintf(fd, "%s", IObuff);
                }
                fclose(sfd);
            }
            fprintf(fd, "\n");
        }
    }
}

/*
 * Return TRUE when a function defined in the current script should be
 * profiled.
 */
    int
prof_def_func()
{
    if (current_SID > 0)
        return SCRIPT_ITEM(current_SID).sn_pr_force;
    return FALSE;
}

# endif
#endif

/*
 * If 'autowrite' option set, try to write the file.
 * Careful: autocommands may make "buf" invalid!
 *
 * return FAIL for failure, OK otherwise
 */
    int
autowrite(buf, forceit)
    buf_T       *buf;
    int         forceit;
{
    int         r;

    if (!(p_aw || p_awa) || !p_write
#ifdef FEAT_QUICKFIX
            /* never autowrite a "nofile" or "nowrite" buffer */
            || bt_dontwrite(buf)
#endif
            || (!forceit && buf->b_p_ro) || buf->b_ffname == NULL)
        return FAIL;
    r = buf_write_all(buf, forceit);

    /* Writing may succeed but the buffer still changed, e.g., when there is a
     * conversion error.  We do want to return FAIL then. */
    if (buf_valid(buf) && bufIsChanged(buf))
        r = FAIL;
    return r;
}

/*
 * flush all buffers, except the ones that are readonly
 */
    void
autowrite_all()
{
    buf_T       *buf;

    if (!(p_aw || p_awa) || !p_write)
        return;
    for (buf = firstbuf; buf; buf = buf->b_next)
        if (bufIsChanged(buf) && !buf->b_p_ro)
        {
            (void)buf_write_all(buf, FALSE);
#ifdef FEAT_AUTOCMD
            /* an autocommand may have deleted the buffer */
            if (!buf_valid(buf))
                buf = firstbuf;
#endif
        }
}

/*
 * return TRUE if buffer was changed and cannot be abandoned.
 */
    int
check_changed(buf, checkaw, mult_win, forceit, allbuf)
    buf_T       *buf;
    int         checkaw;        /* do autowrite if buffer was changed */
    int         mult_win;       /* check also when several wins for the buf */
    int         forceit;
    int         allbuf UNUSED;  /* may write all buffers */
{
    if (       !forceit
            && bufIsChanged(buf)
            && (mult_win || buf->b_nwindows <= 1)
            && (!checkaw || autowrite(buf, forceit) == FAIL))
    {
#if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
        if ((p_confirm || cmdmod.confirm) && p_write)
        {
            buf_T       *buf2;
            int         count = 0;

            if (allbuf)
                for (buf2 = firstbuf; buf2 != NULL; buf2 = buf2->b_next)
                    if (bufIsChanged(buf2)
                                     && (buf2->b_ffname != NULL
# ifdef FEAT_BROWSE
                                         || cmdmod.browse
# endif
                                        ))
                        ++count;
# ifdef FEAT_AUTOCMD
            if (!buf_valid(buf))
                /* Autocommand deleted buffer, oops!  It's not changed now. */
                return FALSE;
# endif
            dialog_changed(buf, count > 1);
# ifdef FEAT_AUTOCMD
            if (!buf_valid(buf))
                /* Autocommand deleted buffer, oops!  It's not changed now. */
                return FALSE;
# endif
            return bufIsChanged(buf);
        }
#endif
        EMSG(_(e_nowrtmsg));
        return TRUE;
    }
    return FALSE;
}

#if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG) || defined(PROTO)

#if defined(FEAT_BROWSE) || defined(PROTO)
/*
 * When wanting to write a file without a file name, ask the user for a name.
 */
    void
browse_save_fname(buf)
    buf_T       *buf;
{
    if (buf->b_fname == NULL)
    {
        char_u *fname;

        fname = do_browse(BROWSE_SAVE, (char_u *)_("Save As"),
                                                 NULL, NULL, NULL, NULL, buf);
        if (fname != NULL)
        {
            if (setfname(buf, fname, NULL, TRUE) == OK)
                buf->b_flags |= BF_NOTEDITED;
            vim_free(fname);
        }
    }
}
#endif

#ifdef FEAT_GUI_MACVIM
/*
 * "Save changes" dialog that conforms to the Apple HIG.
 */
    int
vim_dialog_save_changes(buf)
    buf_T       *buf;
{
    char_u      buff[IOSIZE];

    dialog_msg(buff, _("Do you want to save the changes you made in the "
                        "document \"%s\"?"), buf->b_fname);
    switch (do_dialog(VIM_QUESTION, buff,
                (char_u*) _("Your changes will be lost if you don't save "
                            "them."),
                (buf->b_fname != NULL)
                    ? (char_u *)_("&Save\n&Cancel\n&Don't Save")
                    : (char_u *)_("&Save...\n&Cancel\n&Don't Save"),
                1, NULL))
    {
        case 1: return VIM_YES;
        case 3: return VIM_NO;
    }

    return VIM_CANCEL;
}

/*
 * "Save all changes" dialog that tries to emulate the above "Save changes"
 * dialog for the case of several modified buffers.
 */
    int
vim_dialog_save_all_changes(buf)
    buf_T       *buf;
{
    char_u      buff[IOSIZE];

    dialog_msg(buff, _("There are several documents with unsaved changes. "
                        "Do you want to save the changes you made in the "
                        "document \"%s\"?"), buf->b_fname);
    switch (do_dialog(VIM_QUESTION, buff,
                (char_u*) _("Your changes will be lost if you don't save "
                            "them."),
                (char_u *)_("&Save\n&Don't Save\nS&ave All\nD&iscard All\n"
                            "&Cancel"),
                1, NULL))
    {
        case 1: return VIM_YES;
        case 2: return VIM_NO;
        case 3: return VIM_ALL;
        case 4: return VIM_DISCARDALL;
    }

    return VIM_CANCEL;
}
#endif

/*
 * Ask the user what to do when abondoning a changed buffer.
 * Must check 'write' option first!
 */
    void
dialog_changed(buf, checkall)
    buf_T       *buf;
    int         checkall;       /* may abandon all changed buffers */
{
    char_u      buff[IOSIZE];
    int         ret;
    buf_T       *buf2;

#ifdef FEAT_GUI_MACVIM
    /* Save dialogs on Mac OS X are standardized so in case the GUI is enabled
     * and "c" isn't in 'guioptions' we use a OS X specific dialog. */
    if (gui.in_use && vim_strchr(p_go, GO_CONDIALOG) == NULL)
    {
        if (checkall)
            ret = vim_dialog_save_all_changes(buf);
        else
            ret = vim_dialog_save_changes(buf);
    }
    else
    {
#endif
    dialog_msg(buff, _("Save changes to \"%s\"?"),
                        (buf->b_fname != NULL) ?
                        buf->b_fname : (char_u *)_("Untitled"));
    if (checkall)
        ret = vim_dialog_yesnoallcancel(VIM_QUESTION, NULL, buff, 1);
    else
        ret = vim_dialog_yesnocancel(VIM_QUESTION, NULL, buff, 1);
#ifdef FEAT_GUI_MACVIM
    }
#endif

    if (ret == VIM_YES)
    {
#ifdef FEAT_BROWSE
        /* May get file name, when there is none */
        browse_save_fname(buf);
#endif
        if (buf->b_fname != NULL)   /* didn't hit Cancel */
            (void)buf_write_all(buf, FALSE);
    }
    else if (ret == VIM_NO)
    {
        unchanged(buf, TRUE);
    }
    else if (ret == VIM_ALL)
    {
        /*
         * Write all modified files that can be written.
         * Skip readonly buffers, these need to be confirmed
         * individually.
         */
        for (buf2 = firstbuf; buf2 != NULL; buf2 = buf2->b_next)
        {
            if (bufIsChanged(buf2)
                    && (buf2->b_ffname != NULL
#ifdef FEAT_BROWSE
                        || cmdmod.browse
#endif
                        )
                    && !buf2->b_p_ro)
            {
#ifdef FEAT_BROWSE
                /* May get file name, when there is none */
                browse_save_fname(buf2);
#endif
                if (buf2->b_fname != NULL)   /* didn't hit Cancel */
                    (void)buf_write_all(buf2, FALSE);
#ifdef FEAT_AUTOCMD
                /* an autocommand may have deleted the buffer */
                if (!buf_valid(buf2))
                    buf2 = firstbuf;
#endif
            }
        }
    }
    else if (ret == VIM_DISCARDALL)
    {
        /*
         * mark all buffers as unchanged
         */
        for (buf2 = firstbuf; buf2 != NULL; buf2 = buf2->b_next)
            unchanged(buf2, TRUE);
    }
}
#endif

/*
 * Return TRUE if the buffer "buf" can be abandoned, either by making it
 * hidden, autowriting it or unloading it.
 */
    int
can_abandon(buf, forceit)
    buf_T       *buf;
    int         forceit;
{
    return (       P_HID(buf)
                || !bufIsChanged(buf)
                || buf->b_nwindows > 1
                || autowrite(buf, forceit) == OK
                || forceit);
}

/*
 * Return TRUE if any buffer was changed and cannot be abandoned.
 * That changed buffer becomes the current buffer.
 */
    int
check_changed_any(hidden)
    int         hidden;         /* Only check hidden buffers */
{
    buf_T       *buf;
    int         save;
#ifdef FEAT_WINDOWS
    win_T       *wp;
#endif

    for (;;)
    {
        /* check curbuf first: if it was changed we can't abandon it */
        if (!hidden && curbufIsChanged())
            buf = curbuf;
        else
        {
            for (buf = firstbuf; buf != NULL; buf = buf->b_next)
                if ((!hidden || buf->b_nwindows == 0) && bufIsChanged(buf))
                    break;
        }
        if (buf == NULL)    /* No buffers changed */
            return FALSE;

        /* Try auto-writing the buffer.  If this fails but the buffer no
         * longer exists it's not changed, that's OK. */
        if (check_changed(buf, p_awa, TRUE, FALSE, TRUE) && buf_valid(buf))
            break;          /* didn't save - still changes */
    }

    exiting = FALSE;
#if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
    /*
     * When ":confirm" used, don't give an error message.
     */
    if (!(p_confirm || cmdmod.confirm))
#endif
    {
        /* There must be a wait_return for this message, do_buffer()
         * may cause a redraw.  But wait_return() is a no-op when vgetc()
         * is busy (Quit used from window menu), then make sure we don't
         * cause a scroll up. */
        if (vgetc_busy > 0)
        {
            msg_row = cmdline_row;
            msg_col = 0;
            msg_didout = FALSE;
        }
        if (EMSG2(_("E162: No write since last change for buffer \"%s\""),
                    buf_spname(buf) != NULL ? (char_u *)buf_spname(buf) :
                    buf->b_fname))
        {
            save = no_wait_return;
            no_wait_return = FALSE;
            wait_return(FALSE);
            no_wait_return = save;
        }
    }

#ifdef FEAT_WINDOWS
    /* Try to find a window that contains the buffer. */
    if (buf != curbuf)
        for (wp = firstwin; wp != NULL; wp = wp->w_next)
            if (wp->w_buffer == buf)
            {
                win_goto(wp);
# ifdef FEAT_AUTOCMD
                /* Paranoia: did autocms wipe out the buffer with changes? */
                if (!buf_valid(buf))
                    return TRUE;
# endif
                break;
            }
#endif

    /* Open the changed buffer in the current window. */
    if (buf != curbuf)
        set_curbuf(buf, DOBUF_GOTO);

    return TRUE;
}

/*
 * return FAIL if there is no file name, OK if there is one
 * give error message for FAIL
 */
    int
check_fname()
{
    if (curbuf->b_ffname == NULL)
    {
        EMSG(_(e_noname));
        return FAIL;
    }
    return OK;
}

/*
 * flush the contents of a buffer, unless it has no file name
 *
 * return FAIL for failure, OK otherwise
 */
    int
buf_write_all(buf, forceit)
    buf_T       *buf;
    int         forceit;
{
    int     retval;
#ifdef FEAT_AUTOCMD
    buf_T       *old_curbuf = curbuf;
#endif

    retval = (buf_write(buf, buf->b_ffname, buf->b_fname,
                                   (linenr_T)1, buf->b_ml.ml_line_count, NULL,
                                                  FALSE, forceit, TRUE, FALSE));
#ifdef FEAT_AUTOCMD
    if (curbuf != old_curbuf)
    {
        msg_source(hl_attr(HLF_W));
        MSG(_("Warning: Entered other buffer unexpectedly (check autocommands)"));
    }
#endif
    return retval;
}

/*
 * Code to handle the argument list.
 */

static char_u   *do_one_arg __ARGS((char_u *str));
static int      do_arglist __ARGS((char_u *str, int what, int after));
static void     alist_check_arg_idx __ARGS((void));
static int      editing_arg_idx __ARGS((win_T *win));
#ifdef FEAT_LISTCMDS
static int      alist_add_list __ARGS((int count, char_u **files, int after));
#endif
#define AL_SET  1
#define AL_ADD  2
#define AL_DEL  3

/*
 * Isolate one argument, taking backticks.
 * Changes the argument in-place, puts a NUL after it.  Backticks remain.
 * Return a pointer to the start of the next argument.
 */
    static char_u *
do_one_arg(str)
    char_u *str;
{
    char_u      *p;
    int         inbacktick;

    inbacktick = FALSE;
    for (p = str; *str; ++str)
    {
        /* When the backslash is used for escaping the special meaning of a
         * character we need to keep it until wildcard expansion. */
        if (rem_backslash(str))
        {
            *p++ = *str++;
            *p++ = *str;
        }
        else
        {
            /* An item ends at a space not in backticks */
            if (!inbacktick && vim_isspace(*str))
                break;
            if (*str == '`')
                inbacktick ^= TRUE;
            *p++ = *str;
        }
    }
    str = skipwhite(str);
    *p = NUL;

    return str;
}

/*
 * Separate the arguments in "str" and return a list of pointers in the
 * growarray "gap".
 */
    int
get_arglist(gap, str)
    garray_T    *gap;
    char_u      *str;
{
    ga_init2(gap, (int)sizeof(char_u *), 20);
    while (*str != NUL)
    {
        if (ga_grow(gap, 1) == FAIL)
        {
            ga_clear(gap);
            return FAIL;
        }
        ((char_u **)gap->ga_data)[gap->ga_len++] = str;

        /* Isolate one argument, change it in-place, put a NUL after it. */
        str = do_one_arg(str);
    }
    return OK;
}

#if defined(FEAT_QUICKFIX) || defined(FEAT_SYN_HL) || defined(PROTO)
/*
 * Parse a list of arguments (file names), expand them and return in
 * "fnames[fcountp]".
 * Return FAIL or OK.
 */
    int
get_arglist_exp(str, fcountp, fnamesp)
    char_u      *str;
    int         *fcountp;
    char_u      ***fnamesp;
{
    garray_T    ga;
    int         i;

    if (get_arglist(&ga, str) == FAIL)
        return FAIL;
    i = gen_expand_wildcards(ga.ga_len, (char_u **)ga.ga_data,
                                       fcountp, fnamesp, EW_FILE|EW_NOTFOUND);
    ga_clear(&ga);
    return i;
}
#endif

#if defined(FEAT_GUI) || defined(FEAT_CLIENTSERVER) || defined(PROTO)
/*
 * Redefine the argument list.
 */
    void
set_arglist(str)
    char_u      *str;
{
    do_arglist(str, AL_SET, 0);
}
#endif

/*
 * "what" == AL_SET: Redefine the argument list to 'str'.
 * "what" == AL_ADD: add files in 'str' to the argument list after "after".
 * "what" == AL_DEL: remove files in 'str' from the argument list.
 *
 * Return FAIL for failure, OK otherwise.
 */
    static int
do_arglist(str, what, after)
    char_u      *str;
    int         what UNUSED;
    int         after UNUSED;           /* 0 means before first one */
{
    garray_T    new_ga;
    int         exp_count;
    char_u      **exp_files;
    int         i;
#ifdef FEAT_LISTCMDS
    char_u      *p;
    int         match;
#endif

    /*
     * Collect all file name arguments in "new_ga".
     */
    if (get_arglist(&new_ga, str) == FAIL)
        return FAIL;

#ifdef FEAT_LISTCMDS
    if (what == AL_DEL)
    {
        regmatch_T      regmatch;
        int             didone;

        /*
         * Delete the items: use each item as a regexp and find a match in the
         * argument list.
         */
#ifdef CASE_INSENSITIVE_FILENAME
        regmatch.rm_ic = TRUE;          /* Always ignore case */
#else
        regmatch.rm_ic = FALSE;         /* Never ignore case */
#endif
        for (i = 0; i < new_ga.ga_len && !got_int; ++i)
        {
            p = ((char_u **)new_ga.ga_data)[i];
            p = file_pat_to_reg_pat(p, NULL, NULL, FALSE);
            if (p == NULL)
                break;
            regmatch.regprog = vim_regcomp(p, p_magic ? RE_MAGIC : 0);
            if (regmatch.regprog == NULL)
            {
                vim_free(p);
                break;
            }

            didone = FALSE;
            for (match = 0; match < ARGCOUNT; ++match)
                if (vim_regexec(&regmatch, alist_name(&ARGLIST[match]),
                                                                  (colnr_T)0))
                {
                    didone = TRUE;
                    vim_free(ARGLIST[match].ae_fname);
                    mch_memmove(ARGLIST + match, ARGLIST + match + 1,
                            (ARGCOUNT - match - 1) * sizeof(aentry_T));
                    --ALIST(curwin)->al_ga.ga_len;
                    if (curwin->w_arg_idx > match)
                        --curwin->w_arg_idx;
                    --match;
                }

            vim_free(regmatch.regprog);
            vim_free(p);
            if (!didone)
                EMSG2(_(e_nomatch2), ((char_u **)new_ga.ga_data)[i]);
        }
        ga_clear(&new_ga);
    }
    else
#endif
    {
        i = expand_wildcards(new_ga.ga_len, (char_u **)new_ga.ga_data,
                &exp_count, &exp_files, EW_DIR|EW_FILE|EW_ADDSLASH|EW_NOTFOUND);
        ga_clear(&new_ga);
        if (i == FAIL)
            return FAIL;
        if (exp_count == 0)
        {
            EMSG(_(e_nomatch));
            return FAIL;
        }

#ifdef FEAT_LISTCMDS
        if (what == AL_ADD)
        {
            (void)alist_add_list(exp_count, exp_files, after);
            vim_free(exp_files);
        }
        else /* what == AL_SET */
#endif
            alist_set(ALIST(curwin), exp_count, exp_files, FALSE, NULL, 0);
    }

    alist_check_arg_idx();

    return OK;
}

/*
 * Check the validity of the arg_idx for each other window.
 */
    static void
alist_check_arg_idx()
{
#ifdef FEAT_WINDOWS
    win_T       *win;
    tabpage_T   *tp;

    FOR_ALL_TAB_WINDOWS(tp, win)
        if (win->w_alist == curwin->w_alist)
            check_arg_idx(win);
#else
    check_arg_idx(curwin);
#endif
}

/*
 * Return TRUE if window "win" is editing then file at the current argument
 * index.
 */
    static int
editing_arg_idx(win)
    win_T       *win;
{
    return !(win->w_arg_idx >= WARGCOUNT(win)
                || (win->w_buffer->b_fnum
                                      != WARGLIST(win)[win->w_arg_idx].ae_fnum
                    && (win->w_buffer->b_ffname == NULL
                         || !(fullpathcmp(
                                 alist_name(&WARGLIST(win)[win->w_arg_idx]),
                                win->w_buffer->b_ffname, TRUE) & FPC_SAME))));
}

/*
 * Check if window "win" is editing the w_arg_idx file in its argument list.
 */
    void
check_arg_idx(win)
    win_T       *win;
{
    if (WARGCOUNT(win) > 1 && !editing_arg_idx(win))
    {
        /* We are not editing the current entry in the argument list.
         * Set "arg_had_last" if we are editing the last one. */
        win->w_arg_idx_invalid = TRUE;
        if (win->w_arg_idx != WARGCOUNT(win) - 1
                && arg_had_last == FALSE
#ifdef FEAT_WINDOWS
                && ALIST(win) == &global_alist
#endif
                && GARGCOUNT > 0
                && win->w_arg_idx < GARGCOUNT
                && (win->w_buffer->b_fnum == GARGLIST[GARGCOUNT - 1].ae_fnum
                    || (win->w_buffer->b_ffname != NULL
                        && (fullpathcmp(alist_name(&GARGLIST[GARGCOUNT - 1]),
                                win->w_buffer->b_ffname, TRUE) & FPC_SAME))))
            arg_had_last = TRUE;
    }
    else
    {
        /* We are editing the current entry in the argument list.
         * Set "arg_had_last" if it's also the last one */
        win->w_arg_idx_invalid = FALSE;
        if (win->w_arg_idx == WARGCOUNT(win) - 1
#ifdef FEAT_WINDOWS
                && win->w_alist == &global_alist
#endif
                )
            arg_had_last = TRUE;
    }
}

/*
 * ":args", ":argslocal" and ":argsglobal".
 */
    void
ex_args(eap)
    exarg_T     *eap;
{
    int         i;

    if (eap->cmdidx != CMD_args)
    {
#if defined(FEAT_WINDOWS) && defined(FEAT_LISTCMDS)
        alist_unlink(ALIST(curwin));
        if (eap->cmdidx == CMD_argglobal)
            ALIST(curwin) = &global_alist;
        else /* eap->cmdidx == CMD_arglocal */
            alist_new();
#else
        ex_ni(eap);
        return;
#endif
    }

    if (!ends_excmd(*eap->arg))
    {
        /*
         * ":args file ..": define new argument list, handle like ":next"
         * Also for ":argslocal file .." and ":argsglobal file ..".
         */
        ex_next(eap);
    }
    else
#if defined(FEAT_WINDOWS) && defined(FEAT_LISTCMDS)
        if (eap->cmdidx == CMD_args)
#endif
    {
        /*
         * ":args": list arguments.
         */
        if (ARGCOUNT > 0)
        {
            /* Overwrite the command, for a short list there is no scrolling
             * required and no wait_return(). */
            gotocmdline(TRUE);
            for (i = 0; i < ARGCOUNT; ++i)
            {
                if (i == curwin->w_arg_idx)
                    msg_putchar('[');
                msg_outtrans(alist_name(&ARGLIST[i]));
                if (i == curwin->w_arg_idx)
                    msg_putchar(']');
                msg_putchar(' ');
            }
        }
    }
#if defined(FEAT_WINDOWS) && defined(FEAT_LISTCMDS)
    else if (eap->cmdidx == CMD_arglocal)
    {
        garray_T        *gap = &curwin->w_alist->al_ga;

        /*
         * ":argslocal": make a local copy of the global argument list.
         */
        if (ga_grow(gap, GARGCOUNT) == OK)
            for (i = 0; i < GARGCOUNT; ++i)
                if (GARGLIST[i].ae_fname != NULL)
                {
                    AARGLIST(curwin->w_alist)[gap->ga_len].ae_fname =
                                            vim_strsave(GARGLIST[i].ae_fname);
                    AARGLIST(curwin->w_alist)[gap->ga_len].ae_fnum =
                                                          GARGLIST[i].ae_fnum;
                    ++gap->ga_len;
                }
    }
#endif
}

/*
 * ":previous", ":sprevious", ":Next" and ":sNext".
 */
    void
ex_previous(eap)
    exarg_T     *eap;
{
    /* If past the last one already, go to the last one. */
    if (curwin->w_arg_idx - (int)eap->line2 >= ARGCOUNT)
        do_argfile(eap, ARGCOUNT - 1);
    else
        do_argfile(eap, curwin->w_arg_idx - (int)eap->line2);
}

/*
 * ":rewind", ":first", ":sfirst" and ":srewind".
 */
    void
ex_rewind(eap)
    exarg_T     *eap;
{
    do_argfile(eap, 0);
}

/*
 * ":last" and ":slast".
 */
    void
ex_last(eap)
    exarg_T     *eap;
{
    do_argfile(eap, ARGCOUNT - 1);
}

/*
 * ":argument" and ":sargument".
 */
    void
ex_argument(eap)
    exarg_T     *eap;
{
    int         i;

    if (eap->addr_count > 0)
        i = eap->line2 - 1;
    else
        i = curwin->w_arg_idx;
    do_argfile(eap, i);
}

/*
 * Edit file "argn" of the argument lists.
 */
    void
do_argfile(eap, argn)
    exarg_T     *eap;
    int         argn;
{
    int         other;
    char_u      *p;
    int         old_arg_idx = curwin->w_arg_idx;

    if (argn < 0 || argn >= ARGCOUNT)
    {
        if (ARGCOUNT <= 1)
            EMSG(_("E163: There is only one file to edit"));
        else if (argn < 0)
            EMSG(_("E164: Cannot go before first file"));
        else
            EMSG(_("E165: Cannot go beyond last file"));
    }
    else
    {
        setpcmark();
#ifdef FEAT_GUI
        need_mouse_correct = TRUE;
#endif

#ifdef FEAT_WINDOWS
        /* split window or create new tab page first */
        if (*eap->cmd == 's' || cmdmod.tab != 0)
        {
            if (win_split(0, 0) == FAIL)
                return;
# ifdef FEAT_SCROLLBIND
            curwin->w_p_scb = FALSE;
# endif
        }
        else
#endif
        {
            /*
             * if 'hidden' set, only check for changed file when re-editing
             * the same buffer
             */
            other = TRUE;
            if (P_HID(curbuf))
            {
                p = fix_fname(alist_name(&ARGLIST[argn]));
                other = otherfile(p);
                vim_free(p);
            }
            if ((!P_HID(curbuf) || !other)
                  && check_changed(curbuf, TRUE, !other, eap->forceit, FALSE))
                return;
        }

        curwin->w_arg_idx = argn;
        if (argn == ARGCOUNT - 1
#ifdef FEAT_WINDOWS
                && curwin->w_alist == &global_alist
#endif
           )
            arg_had_last = TRUE;

        /* Edit the file; always use the last known line number.
         * When it fails (e.g. Abort for already edited file) restore the
         * argument index. */
        if (do_ecmd(0, alist_name(&ARGLIST[curwin->w_arg_idx]), NULL,
                      eap, ECMD_LAST,
                      (P_HID(curwin->w_buffer) ? ECMD_HIDE : 0)
                         + (eap->forceit ? ECMD_FORCEIT : 0), curwin) == FAIL)
            curwin->w_arg_idx = old_arg_idx;
        /* like Vi: set the mark where the cursor is in the file. */
        else if (eap->cmdidx != CMD_argdo)
            setmark('\'');
    }
}

/*
 * ":next", and commands that behave like it.
 */
    void
ex_next(eap)
    exarg_T     *eap;
{
    int         i;

    /*
     * check for changed buffer now, if this fails the argument list is not
     * redefined.
     */
    if (       P_HID(curbuf)
            || eap->cmdidx == CMD_snext
            || !check_changed(curbuf, TRUE, FALSE, eap->forceit, FALSE))
    {
        if (*eap->arg != NUL)               /* redefine file list */
        {
            if (do_arglist(eap->arg, AL_SET, 0) == FAIL)
                return;
            i = 0;
        }
        else
            i = curwin->w_arg_idx + (int)eap->line2;
        do_argfile(eap, i);
    }
}

#ifdef FEAT_LISTCMDS
/*
 * ":argedit"
 */
    void
ex_argedit(eap)
    exarg_T     *eap;
{
    int         fnum;
    int         i;
    char_u      *s;

    /* Add the argument to the buffer list and get the buffer number. */
    fnum = buflist_add(eap->arg, BLN_LISTED);

    /* Check if this argument is already in the argument list. */
    for (i = 0; i < ARGCOUNT; ++i)
        if (ARGLIST[i].ae_fnum == fnum)
            break;
    if (i == ARGCOUNT)
    {
        /* Can't find it, add it to the argument list. */
        s = vim_strsave(eap->arg);
        if (s == NULL)
            return;
        i = alist_add_list(1, &s,
               eap->addr_count > 0 ? (int)eap->line2 : curwin->w_arg_idx + 1);
        if (i < 0)
            return;
        curwin->w_arg_idx = i;
    }

    alist_check_arg_idx();

    /* Edit the argument. */
    do_argfile(eap, i);
}

/*
 * ":argadd"
 */
    void
ex_argadd(eap)
    exarg_T     *eap;
{
    do_arglist(eap->arg, AL_ADD,
               eap->addr_count > 0 ? (int)eap->line2 : curwin->w_arg_idx + 1);
#ifdef FEAT_TITLE
    maketitle();
#endif
}

/*
 * ":argdelete"
 */
    void
ex_argdelete(eap)
    exarg_T     *eap;
{
    int         i;
    int         n;

    if (eap->addr_count > 0)
    {
        /* ":1,4argdel": Delete all arguments in the range. */
        if (eap->line2 > ARGCOUNT)
            eap->line2 = ARGCOUNT;
        n = eap->line2 - eap->line1 + 1;
        if (*eap->arg != NUL || n <= 0)
            EMSG(_(e_invarg));
        else
        {
            for (i = eap->line1; i <= eap->line2; ++i)
                vim_free(ARGLIST[i - 1].ae_fname);
            mch_memmove(ARGLIST + eap->line1 - 1, ARGLIST + eap->line2,
                        (size_t)((ARGCOUNT - eap->line2) * sizeof(aentry_T)));
            ALIST(curwin)->al_ga.ga_len -= n;
            if (curwin->w_arg_idx >= eap->line2)
                curwin->w_arg_idx -= n;
            else if (curwin->w_arg_idx > eap->line1)
                curwin->w_arg_idx = eap->line1;
        }
    }
    else if (*eap->arg == NUL)
        EMSG(_(e_argreq));
    else
        do_arglist(eap->arg, AL_DEL, 0);
#ifdef FEAT_TITLE
    maketitle();
#endif
}

/*
 * ":argdo", ":windo", ":bufdo", ":tabdo"
 */
    void
ex_listdo(eap)
    exarg_T     *eap;
{
    int         i;
#ifdef FEAT_WINDOWS
    win_T       *wp;
    tabpage_T   *tp;
#endif
    buf_T       *buf;
    int         next_fnum = 0;
#if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
    char_u      *save_ei = NULL;
#endif
    char_u      *p_shm_save;

#ifndef FEAT_WINDOWS
    if (eap->cmdidx == CMD_windo)
    {
        ex_ni(eap);
        return;
    }
#endif

#if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
    if (eap->cmdidx != CMD_windo && eap->cmdidx != CMD_tabdo)
        /* Don't do syntax HL autocommands.  Skipping the syntax file is a
         * great speed improvement. */
        save_ei = au_event_disable(",Syntax");
#endif

    if (eap->cmdidx == CMD_windo
            || eap->cmdidx == CMD_tabdo
            || P_HID(curbuf)
            || !check_changed(curbuf, TRUE, FALSE, eap->forceit, FALSE))
    {
        /* start at the first argument/window/buffer */
        i = 0;
#ifdef FEAT_WINDOWS
        wp = firstwin;
        tp = first_tabpage;
#endif
        /* set pcmark now */
        if (eap->cmdidx == CMD_bufdo)
            goto_buffer(eap, DOBUF_FIRST, FORWARD, 0);
        else
            setpcmark();
        listcmd_busy = TRUE;        /* avoids setting pcmark below */

        while (!got_int)
        {
            if (eap->cmdidx == CMD_argdo)
            {
                /* go to argument "i" */
                if (i == ARGCOUNT)
                    break;
                /* Don't call do_argfile() when already there, it will try
                 * reloading the file. */
                if (curwin->w_arg_idx != i || !editing_arg_idx(curwin))
                {
                    /* Clear 'shm' to avoid that the file message overwrites
                     * any output from the command. */
                    p_shm_save = vim_strsave(p_shm);
                    set_option_value((char_u *)"shm", 0L, (char_u *)"", 0);
                    do_argfile(eap, i);
                    set_option_value((char_u *)"shm", 0L, p_shm_save, 0);
                    vim_free(p_shm_save);
                }
                if (curwin->w_arg_idx != i)
                    break;
                ++i;
            }
#ifdef FEAT_WINDOWS
            else if (eap->cmdidx == CMD_windo)
            {
                /* go to window "wp" */
                if (!win_valid(wp))
                    break;
                win_goto(wp);
                if (curwin != wp)
                    break;  /* something must be wrong */
                wp = curwin->w_next;
            }
            else if (eap->cmdidx == CMD_tabdo)
            {
                /* go to window "tp" */
                if (!valid_tabpage(tp))
                    break;
                goto_tabpage_tp(tp);
                tp = tp->tp_next;
            }
#endif
            else if (eap->cmdidx == CMD_bufdo)
            {
                /* Remember the number of the next listed buffer, in case
                 * ":bwipe" is used or autocommands do something strange. */
                next_fnum = -1;
                for (buf = curbuf->b_next; buf != NULL; buf = buf->b_next)
                    if (buf->b_p_bl)
                    {
                        next_fnum = buf->b_fnum;
                        break;
                    }
            }

            /* execute the command */
            do_cmdline(eap->arg, eap->getline, eap->cookie,
                                                DOCMD_VERBOSE + DOCMD_NOWAIT);

            if (eap->cmdidx == CMD_bufdo)
            {
                /* Done? */
                if (next_fnum < 0)
                    break;
                /* Check if the buffer still exists. */
                for (buf = firstbuf; buf != NULL; buf = buf->b_next)
                    if (buf->b_fnum == next_fnum)
                        break;
                if (buf == NULL)
                    break;

                /* Go to the next buffer.  Clear 'shm' to avoid that the file
                 * message overwrites any output from the command. */
                p_shm_save = vim_strsave(p_shm);
                set_option_value((char_u *)"shm", 0L, (char_u *)"", 0);
                goto_buffer(eap, DOBUF_FIRST, FORWARD, next_fnum);
                set_option_value((char_u *)"shm", 0L, p_shm_save, 0);
                vim_free(p_shm_save);

                /* If autocommands took us elsewhere, quit here */
                if (curbuf->b_fnum != next_fnum)
                    break;
            }

            if (eap->cmdidx == CMD_windo)
            {
                validate_cursor();      /* cursor may have moved */
#ifdef FEAT_SCROLLBIND
                /* required when 'scrollbind' has been set */
                if (curwin->w_p_scb)
                    do_check_scrollbind(TRUE);
#endif
            }
        }
        listcmd_busy = FALSE;
    }

#if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
    if (save_ei != NULL)
    {
        au_event_restore(save_ei);
        apply_autocmds(EVENT_SYNTAX, curbuf->b_p_syn,
                                               curbuf->b_fname, TRUE, curbuf);
    }
#endif
}

/*
 * Add files[count] to the arglist of the current window after arg "after".
 * The file names in files[count] must have been allocated and are taken over.
 * Files[] itself is not taken over.
 * Returns index of first added argument.  Returns -1 when failed (out of mem).
 */
    static int
alist_add_list(count, files, after)
    int         count;
    char_u      **files;
    int         after;      /* where to add: 0 = before first one */
{
    int         i;

    if (ga_grow(&ALIST(curwin)->al_ga, count) == OK)
    {
        if (after < 0)
            after = 0;
        if (after > ARGCOUNT)
            after = ARGCOUNT;
        if (after < ARGCOUNT)
            mch_memmove(&(ARGLIST[after + count]), &(ARGLIST[after]),
                                       (ARGCOUNT - after) * sizeof(aentry_T));
        for (i = 0; i < count; ++i)
        {
            ARGLIST[after + i].ae_fname = files[i];
            ARGLIST[after + i].ae_fnum = buflist_add(files[i], BLN_LISTED);
        }
        ALIST(curwin)->al_ga.ga_len += count;
        if (curwin->w_arg_idx >= after)
            ++curwin->w_arg_idx;
        return after;
    }

    for (i = 0; i < count; ++i)
        vim_free(files[i]);
    return -1;
}

#endif /* FEAT_LISTCMDS */

#ifdef FEAT_EVAL
/*
 * ":compiler[!] {name}"
 */
    void
ex_compiler(eap)
    exarg_T     *eap;
{
    char_u      *buf;
    char_u      *old_cur_comp = NULL;
    char_u      *p;

    if (*eap->arg == NUL)
    {
        /* List all compiler scripts. */
        do_cmdline_cmd((char_u *)"echo globpath(&rtp, 'compiler/*.vim')");
                                        /* ) keep the indenter happy... */
    }
    else
    {
        buf = alloc((unsigned)(STRLEN(eap->arg) + 14));
        if (buf != NULL)
        {
            if (eap->forceit)
            {
                /* ":compiler! {name}" sets global options */
                do_cmdline_cmd((char_u *)
                                   "command -nargs=* CompilerSet set <args>");
            }
            else
            {
                /* ":compiler! {name}" sets local options.
                 * To remain backwards compatible "current_compiler" is always
                 * used.  A user's compiler plugin may set it, the distributed
                 * plugin will then skip the settings.  Afterwards set
                 * "b:current_compiler" and restore "current_compiler".
                 * Explicitly prepend "g:" to make it work in a function. */
                old_cur_comp = get_var_value((char_u *)"g:current_compiler");
                if (old_cur_comp != NULL)
                    old_cur_comp = vim_strsave(old_cur_comp);
                do_cmdline_cmd((char_u *)
                              "command -nargs=* CompilerSet setlocal <args>");
            }
            do_unlet((char_u *)"g:current_compiler", TRUE);
            do_unlet((char_u *)"b:current_compiler", TRUE);

            sprintf((char *)buf, "compiler/%s.vim", eap->arg);
            if (source_runtime(buf, TRUE) == FAIL)
                EMSG2(_("E666: compiler not supported: %s"), eap->arg);
            vim_free(buf);

            do_cmdline_cmd((char_u *)":delcommand CompilerSet");

            /* Set "b:current_compiler" from "current_compiler". */
            p = get_var_value((char_u *)"g:current_compiler");
            if (p != NULL)
                set_internal_string_var((char_u *)"b:current_compiler", p);

            /* Restore "current_compiler" for ":compiler {name}". */
            if (!eap->forceit)
            {
                if (old_cur_comp != NULL)
                {
                    set_internal_string_var((char_u *)"g:current_compiler",
                                                                old_cur_comp);
                    vim_free(old_cur_comp);
                }
                else
                    do_unlet((char_u *)"g:current_compiler", TRUE);
            }
        }
    }
}
#endif

/*
 * ":runtime {name}"
 */
    void
ex_runtime(eap)
    exarg_T     *eap;
{
    source_runtime(eap->arg, eap->forceit);
}

static void source_callback __ARGS((char_u *fname, void *cookie));

    static void
source_callback(fname, cookie)
    char_u      *fname;
    void        *cookie UNUSED;
{
    (void)do_source(fname, FALSE, DOSO_NONE);
}

/*
 * Source the file "name" from all directories in 'runtimepath'.
 * "name" can contain wildcards.
 * When "all" is TRUE, source all files, otherwise only the first one.
 * return FAIL when no file could be sourced, OK otherwise.
 */
    int
source_runtime(name, all)
    char_u      *name;
    int         all;
{
    return do_in_runtimepath(name, all, source_callback, NULL);
}

/*
 * Find "name" in 'runtimepath'.  When found, invoke the callback function for
 * it: callback(fname, "cookie")
 * When "all" is TRUE repeat for all matches, otherwise only the first one is
 * used.
 * Returns OK when at least one match found, FAIL otherwise.
 */
    int
do_in_runtimepath(name, all, callback, cookie)
    char_u      *name;
    int         all;
    void        (*callback)__ARGS((char_u *fname, void *ck));
    void        *cookie;
{
    char_u      *rtp;
    char_u      *np;
    char_u      *buf;
    char_u      *rtp_copy;
    char_u      *tail;
    int         num_files;
    char_u      **files;
    int         i;
    int         did_one = FALSE;
#ifdef AMIGA
    struct Process      *proc = (struct Process *)FindTask(0L);
    APTR                save_winptr = proc->pr_WindowPtr;

    /* Avoid a requester here for a volume that doesn't exist. */
    proc->pr_WindowPtr = (APTR)-1L;
#endif

    /* Make a copy of 'runtimepath'.  Invoking the callback may change the
     * value. */
    rtp_copy = vim_strsave(p_rtp);
    buf = alloc(MAXPATHL);
    if (buf != NULL && rtp_copy != NULL)
    {
        if (p_verbose > 1)
        {
            verbose_enter();
            smsg((char_u *)_("Searching for \"%s\" in \"%s\""),
                                                 (char *)name, (char *)p_rtp);
            verbose_leave();
        }

        /* Loop over all entries in 'runtimepath'. */
        rtp = rtp_copy;
        while (*rtp != NUL && (all || !did_one))
        {
            /* Copy the path from 'runtimepath' to buf[]. */
            copy_option_part(&rtp, buf, MAXPATHL, ",");
            if (STRLEN(buf) + STRLEN(name) + 2 < MAXPATHL)
            {
                add_pathsep(buf);
                tail = buf + STRLEN(buf);

                /* Loop over all patterns in "name" */
                np = name;
                while (*np != NUL && (all || !did_one))
                {
                    /* Append the pattern from "name" to buf[]. */
                    copy_option_part(&np, tail, (int)(MAXPATHL - (tail - buf)),
                                                                       "\t ");

                    if (p_verbose > 2)
                    {
                        verbose_enter();
                        smsg((char_u *)_("Searching for \"%s\""), buf);
                        verbose_leave();
                    }

                    /* Expand wildcards, invoke the callback for each match. */
                    if (gen_expand_wildcards(1, &buf, &num_files, &files,
                                                               EW_FILE) == OK)
                    {
                        for (i = 0; i < num_files; ++i)
                        {
                            (*callback)(files[i], cookie);
                            did_one = TRUE;
                            if (!all)
                                break;
                        }
                        FreeWild(num_files, files);
                    }
                }
            }
        }
    }
    vim_free(buf);
    vim_free(rtp_copy);
    if (p_verbose > 0 && !did_one)
    {
        verbose_enter();
        smsg((char_u *)_("not found in 'runtimepath': \"%s\""), name);
        verbose_leave();
    }

#ifdef AMIGA
    proc->pr_WindowPtr = save_winptr;
#endif

    return did_one ? OK : FAIL;
}

#if defined(FEAT_EVAL) && defined(FEAT_AUTOCMD)
/*
 * ":options"
 */
    void
ex_options(eap)
    exarg_T     *eap UNUSED;
{
    cmd_source((char_u *)SYS_OPTWIN_FILE, NULL);
}
#endif

/*
 * ":source {fname}"
 */
    void
ex_source(eap)
    exarg_T     *eap;
{
#ifdef FEAT_BROWSE
    if (cmdmod.browse)
    {
        char_u *fname = NULL;

        fname = do_browse(0, (char_u *)_("Source Vim script"), eap->arg,
                                      NULL, NULL, BROWSE_FILTER_MACROS, NULL);
        if (fname != NULL)
        {
            cmd_source(fname, eap);
            vim_free(fname);
        }
    }
    else
#endif
        cmd_source(eap->arg, eap);
}

    static void
cmd_source(fname, eap)
    char_u      *fname;
    exarg_T     *eap;
{
    if (*fname == NUL)
        EMSG(_(e_argreq));

    else if (eap != NULL && eap->forceit)
        /* ":source!": read Normal mdoe commands
         * Need to execute the commands directly.  This is required at least
         * for:
         * - ":g" command busy
         * - after ":argdo", ":windo" or ":bufdo"
         * - another command follows
         * - inside a loop
         */
        openscript(fname, global_busy || listcmd_busy || eap->nextcmd != NULL
#ifdef FEAT_EVAL
                                                 || eap->cstack->cs_idx >= 0
#endif
                                                 );

    /* ":source" read ex commands */
    else if (do_source(fname, FALSE, DOSO_NONE) == FAIL)
        EMSG2(_(e_notopen), fname);
}

/*
 * ":source" and associated commands.
 */
/*
 * Structure used to store info for each sourced file.
 * It is shared between do_source() and getsourceline().
 * This is required, because it needs to be handed to do_cmdline() and
 * sourcing can be done recursively.
 */
struct source_cookie
{
    FILE        *fp;            /* opened file for sourcing */
    char_u      *nextline;      /* if not NULL: line that was read ahead */
    int         finished;       /* ":finish" used */
#if defined (USE_CRNL) || defined (USE_CR)
    int         fileformat;     /* EOL_UNKNOWN, EOL_UNIX or EOL_DOS */
    int         error;          /* TRUE if LF found after CR-LF */
#endif
#ifdef FEAT_EVAL
    linenr_T    breakpoint;     /* next line with breakpoint or zero */
    char_u      *fname;         /* name of sourced file */
    int         dbg_tick;       /* debug_tick when breakpoint was set */
    int         level;          /* top nesting level of sourced file */
#endif
#ifdef FEAT_MBYTE
    vimconv_T   conv;           /* type of conversion */
#endif
};

#ifdef FEAT_EVAL
/*
 * Return the address holding the next breakpoint line for a source cookie.
 */
    linenr_T *
source_breakpoint(cookie)
    void *cookie;
{
    return &((struct source_cookie *)cookie)->breakpoint;
}

/*
 * Return the address holding the debug tick for a source cookie.
 */
    int *
source_dbg_tick(cookie)
    void *cookie;
{
    return &((struct source_cookie *)cookie)->dbg_tick;
}

/*
 * Return the nesting level for a source cookie.
 */
    int
source_level(cookie)
    void *cookie;
{
    return ((struct source_cookie *)cookie)->level;
}
#endif

static char_u *get_one_sourceline __ARGS((struct source_cookie *sp));

#if (defined(WIN32) && defined(FEAT_CSCOPE)) || defined(HAVE_FD_CLOEXEC)
# define USE_FOPEN_NOINH
static FILE *fopen_noinh_readbin __ARGS((char *filename));

/*
 * Special function to open a file without handle inheritance.
 * When possible the handle is closed on exec().
 */
    static FILE *
fopen_noinh_readbin(filename)
    char    *filename;
{
# ifdef WIN32
    int fd_tmp = mch_open(filename, O_RDONLY | O_BINARY | O_NOINHERIT, 0);
# else
    int fd_tmp = mch_open(filename, O_RDONLY, 0);
# endif

    if (fd_tmp == -1)
        return NULL;

# ifdef HAVE_FD_CLOEXEC
    {
        int fdflags = fcntl(fd_tmp, F_GETFD);
        if (fdflags >= 0 && (fdflags & FD_CLOEXEC) == 0)
            fcntl(fd_tmp, F_SETFD, fdflags | FD_CLOEXEC);
    }
# endif

    return fdopen(fd_tmp, READBIN);
}
#endif


/*
 * do_source: Read the file "fname" and execute its lines as EX commands.
 *
 * This function may be called recursively!
 *
 * return FAIL if file could not be opened, OK otherwise
 */
    int
do_source(fname, check_other, is_vimrc)
    char_u      *fname;
    int         check_other;        /* check for .vimrc and _vimrc */
    int         is_vimrc;           /* DOSO_ value */
{
    struct source_cookie    cookie;
    char_u                  *save_sourcing_name;
    linenr_T                save_sourcing_lnum;
    char_u                  *p;
    char_u                  *fname_exp;
    char_u                  *firstline = NULL;
    int                     retval = FAIL;
#ifdef FEAT_EVAL
    scid_T                  save_current_SID;
    static scid_T           last_current_SID = 0;
    void                    *save_funccalp;
    int                     save_debug_break_level = debug_break_level;
    scriptitem_T            *si = NULL;
# ifdef UNIX
    struct stat             st;
    int                     stat_ok;
# endif
#endif
#ifdef STARTUPTIME
    struct timeval          tv_rel;
    struct timeval          tv_start;
#endif
#ifdef FEAT_PROFILE
    proftime_T              wait_start;
#endif

#ifdef RISCOS
    p = mch_munge_fname(fname);
#else
    p = expand_env_save(fname);
#endif
    if (p == NULL)
        return retval;
    fname_exp = fix_fname(p);
    vim_free(p);
    if (fname_exp == NULL)
        return retval;
    if (mch_isdir(fname_exp))
    {
        smsg((char_u *)_("Cannot source a directory: \"%s\""), fname);
        goto theend;
    }

#ifdef FEAT_AUTOCMD
    /* Apply SourceCmd autocommands, they should get the file and source it. */
    if (has_autocmd(EVENT_SOURCECMD, fname_exp, NULL)
            && apply_autocmds(EVENT_SOURCECMD, fname_exp, fname_exp,
                                                               FALSE, curbuf))
    {
# ifdef FEAT_EVAL
        retval = aborting() ? FAIL : OK;
# else
        retval = OK;
# endif
        goto theend;
    }

    /* Apply SourcePre autocommands, they may get the file. */
    apply_autocmds(EVENT_SOURCEPRE, fname_exp, fname_exp, FALSE, curbuf);
#endif

#ifdef USE_FOPEN_NOINH
    cookie.fp = fopen_noinh_readbin((char *)fname_exp);
#else
    cookie.fp = mch_fopen((char *)fname_exp, READBIN);
#endif
    if (cookie.fp == NULL && check_other)
    {
        /*
         * Try again, replacing file name ".vimrc" by "_vimrc" or vice versa,
         * and ".exrc" by "_exrc" or vice versa.
         */
        p = gettail(fname_exp);
        if ((*p == '.' || *p == '_')
                && (STRICMP(p + 1, "vimrc") == 0
                    || STRICMP(p + 1, "gvimrc") == 0
                    || STRICMP(p + 1, "exrc") == 0))
        {
            if (*p == '_')
                *p = '.';
            else
                *p = '_';
#ifdef USE_FOPEN_NOINH
            cookie.fp = fopen_noinh_readbin((char *)fname_exp);
#else
            cookie.fp = mch_fopen((char *)fname_exp, READBIN);
#endif
        }
    }

    if (cookie.fp == NULL)
    {
        if (p_verbose > 0)
        {
            verbose_enter();
            if (sourcing_name == NULL)
                smsg((char_u *)_("could not source \"%s\""), fname);
            else
                smsg((char_u *)_("line %ld: could not source \"%s\""),
                                                        sourcing_lnum, fname);
            verbose_leave();
        }
        goto theend;
    }

    /*
     * The file exists.
     * - In verbose mode, give a message.
     * - For a vimrc file, may want to set 'compatible', call vimrc_found().
     */
    if (p_verbose > 1)
    {
        verbose_enter();
        if (sourcing_name == NULL)
            smsg((char_u *)_("sourcing \"%s\""), fname);
        else
            smsg((char_u *)_("line %ld: sourcing \"%s\""),
                                                        sourcing_lnum, fname);
        verbose_leave();
    }
    if (is_vimrc == DOSO_VIMRC)
        vimrc_found(fname_exp, (char_u *)"MYVIMRC");
    else if (is_vimrc == DOSO_GVIMRC)
        vimrc_found(fname_exp, (char_u *)"MYGVIMRC");

#ifdef USE_CRNL
    /* If no automatic file format: Set default to CR-NL. */
    if (*p_ffs == NUL)
        cookie.fileformat = EOL_DOS;
    else
        cookie.fileformat = EOL_UNKNOWN;
    cookie.error = FALSE;
#endif

#ifdef USE_CR
    /* If no automatic file format: Set default to CR. */
    if (*p_ffs == NUL)
        cookie.fileformat = EOL_MAC;
    else
        cookie.fileformat = EOL_UNKNOWN;
    cookie.error = FALSE;
#endif

    cookie.nextline = NULL;
    cookie.finished = FALSE;

#ifdef FEAT_EVAL
    /*
     * Check if this script has a breakpoint.
     */
    cookie.breakpoint = dbg_find_breakpoint(TRUE, fname_exp, (linenr_T)0);
    cookie.fname = fname_exp;
    cookie.dbg_tick = debug_tick;

    cookie.level = ex_nesting_level;
#endif

    /*
     * Keep the sourcing name/lnum, for recursive calls.
     */
    save_sourcing_name = sourcing_name;
    sourcing_name = fname_exp;
    save_sourcing_lnum = sourcing_lnum;
    sourcing_lnum = 0;

#ifdef FEAT_MBYTE
    cookie.conv.vc_type = CONV_NONE;            /* no conversion */

    /* Read the first line so we can check for a UTF-8 BOM. */
    firstline = getsourceline(0, (void *)&cookie, 0);
    if (firstline != NULL && STRLEN(firstline) >= 3 && firstline[0] == 0xef
                              && firstline[1] == 0xbb && firstline[2] == 0xbf)
    {
        /* Found BOM; setup conversion, skip over BOM and recode the line. */
        convert_setup(&cookie.conv, (char_u *)"utf-8", p_enc);
        p = string_convert(&cookie.conv, firstline + 3, NULL);
        if (p == NULL)
            p = vim_strsave(firstline + 3);
        if (p != NULL)
        {
            vim_free(firstline);
            firstline = p;
        }
    }
#endif

#ifdef STARTUPTIME
    if (time_fd != NULL)
        time_push(&tv_rel, &tv_start);
#endif

#ifdef FEAT_EVAL
# ifdef FEAT_PROFILE
    if (do_profiling == PROF_YES)
        prof_child_enter(&wait_start);          /* entering a child now */
# endif

    /* Don't use local function variables, if called from a function.
     * Also starts profiling timer for nested script. */
    save_funccalp = save_funccal();

    /*
     * Check if this script was sourced before to finds its SID.
     * If it's new, generate a new SID.
     */
    save_current_SID = current_SID;
# ifdef UNIX
    stat_ok = (mch_stat((char *)fname_exp, &st) >= 0);
# endif
    for (current_SID = script_items.ga_len; current_SID > 0; --current_SID)
    {
        si = &SCRIPT_ITEM(current_SID);
        if (si->sn_name != NULL
                && (
# ifdef UNIX
                    /* Compare dev/ino when possible, it catches symbolic
                     * links.  Also compare file names, the inode may change
                     * when the file was edited. */
                    ((stat_ok && si->sn_dev_valid)
                        && (si->sn_dev == st.st_dev
                            && si->sn_ino == st.st_ino)) ||
# endif
                fnamecmp(si->sn_name, fname_exp) == 0))
            break;
    }
    if (current_SID == 0)
    {
        current_SID = ++last_current_SID;
        if (ga_grow(&script_items, (int)(current_SID - script_items.ga_len))
                                                                      == FAIL)
            goto almosttheend;
        while (script_items.ga_len < current_SID)
        {
            ++script_items.ga_len;
            SCRIPT_ITEM(script_items.ga_len).sn_name = NULL;
# ifdef FEAT_PROFILE
            SCRIPT_ITEM(script_items.ga_len).sn_prof_on = FALSE;
# endif
        }
        si = &SCRIPT_ITEM(current_SID);
        si->sn_name = fname_exp;
        fname_exp = NULL;
# ifdef UNIX
        if (stat_ok)
        {
            si->sn_dev_valid = TRUE;
            si->sn_dev = st.st_dev;
            si->sn_ino = st.st_ino;
        }
        else
            si->sn_dev_valid = FALSE;
# endif

        /* Allocate the local script variables to use for this script. */
        new_script_vars(current_SID);
    }

# ifdef FEAT_PROFILE
    if (do_profiling == PROF_YES)
    {
        int     forceit;

        /* Check if we do profiling for this script. */
        if (!si->sn_prof_on && has_profiling(TRUE, si->sn_name, &forceit))
        {
            script_do_profile(si);
            si->sn_pr_force = forceit;
        }
        if (si->sn_prof_on)
        {
            ++si->sn_pr_count;
            profile_start(&si->sn_pr_start);
            profile_zero(&si->sn_pr_children);
        }
    }
# endif
#endif

    /*
     * Call do_cmdline, which will call getsourceline() to get the lines.
     */
    do_cmdline(firstline, getsourceline, (void *)&cookie,
                                     DOCMD_VERBOSE|DOCMD_NOWAIT|DOCMD_REPEAT);
    retval = OK;

#ifdef FEAT_PROFILE
    if (do_profiling == PROF_YES)
    {
        /* Get "si" again, "script_items" may have been reallocated. */
        si = &SCRIPT_ITEM(current_SID);
        if (si->sn_prof_on)
        {
            profile_end(&si->sn_pr_start);
            profile_sub_wait(&wait_start, &si->sn_pr_start);
            profile_add(&si->sn_pr_total, &si->sn_pr_start);
            profile_self(&si->sn_pr_self, &si->sn_pr_start,
                                                         &si->sn_pr_children);
        }
    }
#endif

    if (got_int)
        EMSG(_(e_interr));
    sourcing_name = save_sourcing_name;
    sourcing_lnum = save_sourcing_lnum;
    if (p_verbose > 1)
    {
        verbose_enter();
        smsg((char_u *)_("finished sourcing %s"), fname);
        if (sourcing_name != NULL)
            smsg((char_u *)_("continuing in %s"), sourcing_name);
        verbose_leave();
    }
#ifdef STARTUPTIME
    if (time_fd != NULL)
    {
        vim_snprintf((char *)IObuff, IOSIZE, "sourcing %s", fname);
        time_msg((char *)IObuff, &tv_start);
        time_pop(&tv_rel);
    }
#endif

#ifdef FEAT_EVAL
    /*
     * After a "finish" in debug mode, need to break at first command of next
     * sourced file.
     */
    if (save_debug_break_level > ex_nesting_level
            && debug_break_level == ex_nesting_level)
        ++debug_break_level;
#endif

#ifdef FEAT_EVAL
almosttheend:
    current_SID = save_current_SID;
    restore_funccal(save_funccalp);
# ifdef FEAT_PROFILE
    if (do_profiling == PROF_YES)
        prof_child_exit(&wait_start);           /* leaving a child now */
# endif
#endif
    fclose(cookie.fp);
    vim_free(cookie.nextline);
    vim_free(firstline);
#ifdef FEAT_MBYTE
    convert_setup(&cookie.conv, NULL, NULL);
#endif

theend:
    vim_free(fname_exp);
    return retval;
}

#if defined(FEAT_EVAL) || defined(PROTO)

/*
 * ":scriptnames"
 */
    void
ex_scriptnames(eap)
    exarg_T     *eap UNUSED;
{
    int i;

    for (i = 1; i <= script_items.ga_len && !got_int; ++i)
        if (SCRIPT_ITEM(i).sn_name != NULL)
            smsg((char_u *)"%3d: %s", i, SCRIPT_ITEM(i).sn_name);
}

# if defined(BACKSLASH_IN_FILENAME) || defined(PROTO)
/*
 * Fix slashes in the list of script names for 'shellslash'.
 */
    void
scriptnames_slash_adjust()
{
    int i;

    for (i = 1; i <= script_items.ga_len; ++i)
        if (SCRIPT_ITEM(i).sn_name != NULL)
            slash_adjust(SCRIPT_ITEM(i).sn_name);
}
# endif

/*
 * Get a pointer to a script name.  Used for ":verbose set".
 */
    char_u *
get_scriptname(id)
    scid_T      id;
{
    if (id == SID_MODELINE)
        return (char_u *)_("modeline");
    if (id == SID_CMDARG)
        return (char_u *)_("--cmd argument");
    if (id == SID_CARG)
        return (char_u *)_("-c argument");
    if (id == SID_ENV)
        return (char_u *)_("environment variable");
    if (id == SID_ERROR)
        return (char_u *)_("error handler");
    return SCRIPT_ITEM(id).sn_name;
}

# if defined(EXITFREE) || defined(PROTO)
    void
free_scriptnames()
{
    int                 i;

    for (i = script_items.ga_len; i > 0; --i)
        vim_free(SCRIPT_ITEM(i).sn_name);
    ga_clear(&script_items);
}
# endif

#endif

#if defined(USE_CR) || defined(PROTO)

# if defined(__MSL__) && (__MSL__ >= 22)
/*
 * Newer version of the Metrowerks library handle DOS and UNIX files
 * without help.
 * Test with earlier versions, MSL 2.2 is the library supplied with
 * Codewarrior Pro 2.
 */
    char *
fgets_cr(s, n, stream)
    char        *s;
    int         n;
    FILE        *stream;
{
    return fgets(s, n, stream);
}
# else
/*
 * Version of fgets() which also works for lines ending in a <CR> only
 * (Macintosh format).
 * For older versions of the Metrowerks library.
 * At least CodeWarrior 9 needed this code.
 */
    char *
fgets_cr(s, n, stream)
    char        *s;
    int         n;
    FILE        *stream;
{
    int c = 0;
    int char_read = 0;

    while (!feof(stream) && c != '\r' && c != '\n' && char_read < n - 1)
    {
        c = fgetc(stream);
        s[char_read++] = c;
        /* If the file is in DOS format, we need to skip a NL after a CR.  I
         * thought it was the other way around, but this appears to work... */
        if (c == '\n')
        {
            c = fgetc(stream);
            if (c != '\r')
                ungetc(c, stream);
        }
    }

    s[char_read] = 0;
    if (char_read == 0)
        return NULL;

    if (feof(stream) && char_read == 1)
        return NULL;

    return s;
}
# endif
#endif

/*
 * Get one full line from a sourced file.
 * Called by do_cmdline() when it's called from do_source().
 *
 * Return a pointer to the line in allocated memory.
 * Return NULL for end-of-file or some error.
 */
    char_u *
getsourceline(c, cookie, indent)
    int         c UNUSED;
    void        *cookie;
    int         indent UNUSED;
{
    struct source_cookie *sp = (struct source_cookie *)cookie;
    char_u              *line;
    char_u              *p, *s;

#ifdef FEAT_EVAL
    /* If breakpoints have been added/deleted need to check for it. */
    if (sp->dbg_tick < debug_tick)
    {
        sp->breakpoint = dbg_find_breakpoint(TRUE, sp->fname, sourcing_lnum);
        sp->dbg_tick = debug_tick;
    }
# ifdef FEAT_PROFILE
    if (do_profiling == PROF_YES)
        script_line_end();
# endif
#endif
    /*
     * Get current line.  If there is a read-ahead line, use it, otherwise get
     * one now.
     */
    if (sp->finished)
        line = NULL;
    else if (sp->nextline == NULL)
        line = get_one_sourceline(sp);
    else
    {
        line = sp->nextline;
        sp->nextline = NULL;
        ++sourcing_lnum;
    }
#ifdef FEAT_PROFILE
    if (line != NULL && do_profiling == PROF_YES)
        script_line_start();
#endif

    /* Only concatenate lines starting with a \ when 'cpoptions' doesn't
     * contain the 'C' flag. */
    if (line != NULL && (vim_strchr(p_cpo, CPO_CONCAT) == NULL))
    {
        /* compensate for the one line read-ahead */
        --sourcing_lnum;
        for (;;)
        {
            sp->nextline = get_one_sourceline(sp);
            if (sp->nextline == NULL)
                break;
            p = skipwhite(sp->nextline);
            if (*p != '\\')
                break;
            s = alloc((unsigned)(STRLEN(line) + STRLEN(p)));
            if (s == NULL)      /* out of memory */
                break;
            STRCPY(s, line);
            STRCAT(s, p + 1);
            vim_free(line);
            line = s;
            vim_free(sp->nextline);
        }
    }

#ifdef FEAT_MBYTE
    if (line != NULL && sp->conv.vc_type != CONV_NONE)
    {
        /* Convert the encoding of the script line. */
        s = string_convert(&sp->conv, line, NULL);
        if (s != NULL)
        {
            vim_free(line);
            line = s;
        }
    }
#endif

#ifdef FEAT_EVAL
    /* Did we encounter a breakpoint? */
    if (sp->breakpoint != 0 && sp->breakpoint <= sourcing_lnum)
    {
        dbg_breakpoint(sp->fname, sourcing_lnum);
        /* Find next breakpoint. */
        sp->breakpoint = dbg_find_breakpoint(TRUE, sp->fname, sourcing_lnum);
        sp->dbg_tick = debug_tick;
    }
#endif

    return line;
}

    static char_u *
get_one_sourceline(sp)
    struct source_cookie    *sp;
{
    garray_T            ga;
    int                 len;
    int                 c;
    char_u              *buf;
#ifdef USE_CRNL
    int                 has_cr;         /* CR-LF found */
#endif
#ifdef USE_CR
    char_u              *scan;
#endif
    int                 have_read = FALSE;

    /* use a growarray to store the sourced line */
    ga_init2(&ga, 1, 250);

    /*
     * Loop until there is a finished line (or end-of-file).
     */
    sourcing_lnum++;
    for (;;)
    {
        /* make room to read at least 120 (more) characters */
        if (ga_grow(&ga, 120) == FAIL)
            break;
        buf = (char_u *)ga.ga_data;

#ifdef USE_CR
        if (sp->fileformat == EOL_MAC)
        {
            if (fgets_cr((char *)buf + ga.ga_len, ga.ga_maxlen - ga.ga_len,
                                                              sp->fp) == NULL)
                break;
        }
        else
#endif
            if (fgets((char *)buf + ga.ga_len, ga.ga_maxlen - ga.ga_len,
                                                              sp->fp) == NULL)
                break;
        len = ga.ga_len + (int)STRLEN(buf + ga.ga_len);
#ifdef USE_CRNL
        /* Ignore a trailing CTRL-Z, when in Dos mode.  Only recognize the
         * CTRL-Z by its own, or after a NL. */
        if (       (len == 1 || (len >= 2 && buf[len - 2] == '\n'))
                && sp->fileformat == EOL_DOS
                && buf[len - 1] == Ctrl_Z)
        {
            buf[len - 1] = NUL;
            break;
        }
#endif

#ifdef USE_CR
        /* If the read doesn't stop on a new line, and there's
         * some CR then we assume a Mac format */
        if (sp->fileformat == EOL_UNKNOWN)
        {
            if (buf[len - 1] != '\n' && vim_strchr(buf, '\r') != NULL)
                sp->fileformat = EOL_MAC;
            else
                sp->fileformat = EOL_UNIX;
        }

        if (sp->fileformat == EOL_MAC)
        {
            scan = vim_strchr(buf, '\r');

            if (scan != NULL)
            {
                *scan = '\n';
                if (*(scan + 1) != 0)
                {
                    *(scan + 1) = 0;
                    fseek(sp->fp, (long)(scan - buf - len + 1), SEEK_CUR);
                }
            }
            len = STRLEN(buf);
        }
#endif

        have_read = TRUE;
        ga.ga_len = len;

        /* If the line was longer than the buffer, read more. */
        if (ga.ga_maxlen - ga.ga_len == 1 && buf[len - 1] != '\n')
            continue;

        if (len >= 1 && buf[len - 1] == '\n')   /* remove trailing NL */
        {
#ifdef USE_CRNL
            has_cr = (len >= 2 && buf[len - 2] == '\r');
            if (sp->fileformat == EOL_UNKNOWN)
            {
                if (has_cr)
                    sp->fileformat = EOL_DOS;
                else
                    sp->fileformat = EOL_UNIX;
            }

            if (sp->fileformat == EOL_DOS)
            {
                if (has_cr)         /* replace trailing CR */
                {
                    buf[len - 2] = '\n';
                    --len;
                    --ga.ga_len;
                }
                else        /* lines like ":map xx yy^M" will have failed */
                {
                    if (!sp->error)
                    {
                        msg_source(hl_attr(HLF_W));
                        EMSG(_("W15: Warning: Wrong line separator, ^M may be missing"));
                    }
                    sp->error = TRUE;
                    sp->fileformat = EOL_UNIX;
                }
            }
#endif
            /* The '\n' is escaped if there is an odd number of ^V's just
             * before it, first set "c" just before the 'V's and then check
             * len&c parities (is faster than ((len-c)%2 == 0)) -- Acevedo */
            for (c = len - 2; c >= 0 && buf[c] == Ctrl_V; c--)
                ;
            if ((len & 1) != (c & 1))   /* escaped NL, read more */
            {
                sourcing_lnum++;
                continue;
            }

            buf[len - 1] = NUL;         /* remove the NL */
        }

        /*
         * Check for ^C here now and then, so recursive :so can be broken.
         */
        line_breakcheck();
        break;
    }

    if (have_read)
        return (char_u *)ga.ga_data;

    vim_free(ga.ga_data);
    return NULL;
}

#if defined(FEAT_PROFILE) || defined(PROTO)
/*
 * Called when starting to read a script line.
 * "sourcing_lnum" must be correct!
 * When skipping lines it may not actually be executed, but we won't find out
 * until later and we need to store the time now.
 */
    void
script_line_start()
{
    scriptitem_T    *si;
    sn_prl_T        *pp;

    if (current_SID <= 0 || current_SID > script_items.ga_len)
        return;
    si = &SCRIPT_ITEM(current_SID);
    if (si->sn_prof_on && sourcing_lnum >= 1)
    {
        /* Grow the array before starting the timer, so that the time spent
         * here isn't counted. */
        ga_grow(&si->sn_prl_ga, (int)(sourcing_lnum - si->sn_prl_ga.ga_len));
        si->sn_prl_idx = sourcing_lnum - 1;
        while (si->sn_prl_ga.ga_len <= si->sn_prl_idx
                && si->sn_prl_ga.ga_len < si->sn_prl_ga.ga_maxlen)
        {
            /* Zero counters for a line that was not used before. */
            pp = &PRL_ITEM(si, si->sn_prl_ga.ga_len);
            pp->snp_count = 0;
            profile_zero(&pp->sn_prl_total);
            profile_zero(&pp->sn_prl_self);
            ++si->sn_prl_ga.ga_len;
        }
        si->sn_prl_execed = FALSE;
        profile_start(&si->sn_prl_start);
        profile_zero(&si->sn_prl_children);
        profile_get_wait(&si->sn_prl_wait);
    }
}

/*
 * Called when actually executing a function line.
 */
    void
script_line_exec()
{
    scriptitem_T    *si;

    if (current_SID <= 0 || current_SID > script_items.ga_len)
        return;
    si = &SCRIPT_ITEM(current_SID);
    if (si->sn_prof_on && si->sn_prl_idx >= 0)
        si->sn_prl_execed = TRUE;
}

/*
 * Called when done with a function line.
 */
    void
script_line_end()
{
    scriptitem_T    *si;
    sn_prl_T        *pp;

    if (current_SID <= 0 || current_SID > script_items.ga_len)
        return;
    si = &SCRIPT_ITEM(current_SID);
    if (si->sn_prof_on && si->sn_prl_idx >= 0
                                     && si->sn_prl_idx < si->sn_prl_ga.ga_len)
    {
        if (si->sn_prl_execed)
        {
            pp = &PRL_ITEM(si, si->sn_prl_idx);
            ++pp->snp_count;
            profile_end(&si->sn_prl_start);
            profile_sub_wait(&si->sn_prl_wait, &si->sn_prl_start);
            profile_add(&pp->sn_prl_total, &si->sn_prl_start);
            profile_self(&pp->sn_prl_self, &si->sn_prl_start,
                                                        &si->sn_prl_children);
        }
        si->sn_prl_idx = -1;
    }
}
#endif

/*
 * ":scriptencoding": Set encoding conversion for a sourced script.
 * Without the multi-byte feature it's simply ignored.
 */
    void
ex_scriptencoding(eap)
    exarg_T     *eap UNUSED;
{
#ifdef FEAT_MBYTE
    struct source_cookie        *sp;
    char_u                      *name;

    if (!getline_equal(eap->getline, eap->cookie, getsourceline))
    {
        EMSG(_("E167: :scriptencoding used outside of a sourced file"));
        return;
    }

    if (*eap->arg != NUL)
    {
        name = enc_canonize(eap->arg);
        if (name == NULL)       /* out of memory */
            return;
    }
    else
        name = eap->arg;

    /* Setup for conversion from the specified encoding to 'encoding'. */
    sp = (struct source_cookie *)getline_cookie(eap->getline, eap->cookie);
    convert_setup(&sp->conv, name, p_enc);

    if (name != eap->arg)
        vim_free(name);
#endif
}

#if defined(FEAT_EVAL) || defined(PROTO)
/*
 * ":finish": Mark a sourced file as finished.
 */
    void
ex_finish(eap)
    exarg_T     *eap;
{
    if (getline_equal(eap->getline, eap->cookie, getsourceline))
        do_finish(eap, FALSE);
    else
        EMSG(_("E168: :finish used outside of a sourced file"));
}

/*
 * Mark a sourced file as finished.  Possibly makes the ":finish" pending.
 * Also called for a pending finish at the ":endtry" or after returning from
 * an extra do_cmdline().  "reanimate" is used in the latter case.
 */
    void
do_finish(eap, reanimate)
    exarg_T     *eap;
    int         reanimate;
{
    int         idx;

    if (reanimate)
        ((struct source_cookie *)getline_cookie(eap->getline,
                                              eap->cookie))->finished = FALSE;

    /*
     * Cleanup (and inactivate) conditionals, but stop when a try conditional
     * not in its finally clause (which then is to be executed next) is found.
     * In this case, make the ":finish" pending for execution at the ":endtry".
     * Otherwise, finish normally.
     */
    idx = cleanup_conditionals(eap->cstack, 0, TRUE);
    if (idx >= 0)
    {
        eap->cstack->cs_pending[idx] = CSTP_FINISH;
        report_make_pending(CSTP_FINISH, NULL);
    }
    else
        ((struct source_cookie *)getline_cookie(eap->getline,
                                               eap->cookie))->finished = TRUE;
}


/*
 * Return TRUE when a sourced file had the ":finish" command: Don't give error
 * message for missing ":endif".
 * Return FALSE when not sourcing a file.
 */
    int
source_finished(fgetline, cookie)
    char_u      *(*fgetline) __ARGS((int, void *, int));
    void        *cookie;
{
    return (getline_equal(fgetline, cookie, getsourceline)
            && ((struct source_cookie *)getline_cookie(
                                                fgetline, cookie))->finished);
}
#endif

#if defined(FEAT_LISTCMDS) || defined(PROTO)
/*
 * ":checktime [buffer]"
 */
    void
ex_checktime(eap)
    exarg_T     *eap;
{
    buf_T       *buf;
    int         save_no_check_timestamps = no_check_timestamps;

    no_check_timestamps = 0;
    if (eap->addr_count == 0)   /* default is all buffers */
        check_timestamps(FALSE);
    else
    {
        buf = buflist_findnr((int)eap->line2);
        if (buf != NULL)        /* cannot happen? */
            (void)buf_check_timestamp(buf, FALSE);
    }
    no_check_timestamps = save_no_check_timestamps;
}
#endif

#if (defined(HAVE_LOCALE_H) || defined(X_LOCALE)) \
        && (defined(FEAT_EVAL) || defined(FEAT_MULTI_LANG))
static char *get_locale_val __ARGS((int what));

    static char *
get_locale_val(what)
    int         what;
{
    char        *loc;

    /* Obtain the locale value from the libraries.  For DJGPP this is
     * redefined and it doesn't use the arguments. */
    loc = setlocale(what, NULL);

# ifdef WIN32
    if (loc != NULL)
    {
        char_u  *p;

        /* setocale() returns something like "LC_COLLATE=<name>;LC_..." when
         * one of the values (e.g., LC_CTYPE) differs. */
        p = vim_strchr(loc, '=');
        if (p != NULL)
        {
            loc = ++p;
            while (*p != NUL)   /* remove trailing newline */
            {
                if (*p < ' ' || *p == ';')
                {
                    *p = NUL;
                    break;
                }
                ++p;
            }
        }
    }
# endif

    return loc;
}
#endif


#ifdef WIN32
/*
 * On MS-Windows locale names are strings like "German_Germany.1252", but
 * gettext expects "de".  Try to translate one into another here for a few
 * supported languages.
 */
    static char_u *
gettext_lang(char_u *name)
{
    int         i;
    static char *(mtable[]) = {
                        "afrikaans",    "af",
                        "czech",        "cs",
                        "dutch",        "nl",
                        "german",       "de",
                        "english_united kingdom", "en_GB",
                        "spanish",      "es",
                        "french",       "fr",
                        "italian",      "it",
                        "japanese",     "ja",
                        "korean",       "ko",
                        "norwegian",    "no",
                        "polish",       "pl",
                        "russian",      "ru",
                        "slovak",       "sk",
                        "swedish",      "sv",
                        "ukrainian",    "uk",
                        "chinese_china", "zh_CN",
                        "chinese_taiwan", "zh_TW",
                        NULL};

    for (i = 0; mtable[i] != NULL; i += 2)
        if (STRNICMP(mtable[i], name, STRLEN(mtable[i])) == 0)
            return mtable[i + 1];
    return name;
}
#endif

#if defined(FEAT_MULTI_LANG) || defined(PROTO)
/*
 * Obtain the current messages language.  Used to set the default for
 * 'helplang'.  May return NULL or an empty string.
 */
    char_u *
get_mess_lang()
{
    char_u *p;

# if (defined(HAVE_LOCALE_H) || defined(X_LOCALE))
#  if defined(LC_MESSAGES)
    p = (char_u *)get_locale_val(LC_MESSAGES);
#  else
    /* This is necessary for Win32, where LC_MESSAGES is not defined and $LANG
     * may be set to the LCID number.  LC_COLLATE is the best guess, LC_TIME
     * and LC_MONETARY may be set differently for a Japanese working in the
     * US. */
    p = (char_u *)get_locale_val(LC_COLLATE);
#  endif
# else
    p = mch_getenv((char_u *)"LC_ALL");
    if (p == NULL || *p == NUL)
    {
        p = mch_getenv((char_u *)"LC_MESSAGES");
        if (p == NULL || *p == NUL)
            p = mch_getenv((char_u *)"LANG");
    }
# endif
# ifdef WIN32
    p = gettext_lang(p);
# endif
    return p;
}
#endif

/* Complicated #if; matches with where get_mess_env() is used below. */
#if (defined(FEAT_EVAL) && !((defined(HAVE_LOCALE_H) || defined(X_LOCALE)) \
            && defined(LC_MESSAGES))) \
        || ((defined(HAVE_LOCALE_H) || defined(X_LOCALE)) \
                && (defined(FEAT_GETTEXT) || defined(FEAT_MBYTE)) \
                && !defined(LC_MESSAGES))
static char_u *get_mess_env __ARGS((void));

/*
 * Get the language used for messages from the environment.
 */
    static char_u *
get_mess_env()
{
    char_u      *p;

    p = mch_getenv((char_u *)"LC_ALL");
    if (p == NULL || *p == NUL)
    {
        p = mch_getenv((char_u *)"LC_MESSAGES");
        if (p == NULL || *p == NUL)
        {
            p = mch_getenv((char_u *)"LANG");
            if (p != NULL && VIM_ISDIGIT(*p))
                p = NULL;               /* ignore something like "1043" */
# if defined(HAVE_LOCALE_H) || defined(X_LOCALE)
            if (p == NULL || *p == NUL)
                p = (char_u *)get_locale_val(LC_CTYPE);
# endif
        }
    }
    return p;
}
#endif

#if defined(FEAT_EVAL) || defined(PROTO)

/*
 * Set the "v:lang" variable according to the current locale setting.
 * Also do "v:lc_time"and "v:ctype".
 */
    void
set_lang_var()
{
    char_u      *loc;

# if defined(HAVE_LOCALE_H) || defined(X_LOCALE)
    loc = (char_u *)get_locale_val(LC_CTYPE);
# else
    /* setlocale() not supported: use the default value */
    loc = (char_u *)"C";
# endif
    set_vim_var_string(VV_CTYPE, loc, -1);

    /* When LC_MESSAGES isn't defined use the value from $LC_MESSAGES, fall
     * back to LC_CTYPE if it's empty. */
# if (defined(HAVE_LOCALE_H) || defined(X_LOCALE)) && defined(LC_MESSAGES)
    loc = (char_u *)get_locale_val(LC_MESSAGES);
# else
    loc = get_mess_env();
# endif
    set_vim_var_string(VV_LANG, loc, -1);

# if defined(HAVE_LOCALE_H) || defined(X_LOCALE)
    loc = (char_u *)get_locale_val(LC_TIME);
# endif
    set_vim_var_string(VV_LC_TIME, loc, -1);
}
#endif

#if (defined(HAVE_LOCALE_H) || defined(X_LOCALE)) \
        && (defined(FEAT_GETTEXT) || defined(FEAT_MBYTE))
/*
 * ":language":  Set the language (locale).
 */
    void
ex_language(eap)
    exarg_T     *eap;
{
    char        *loc;
    char_u      *p;
    char_u      *name;
    int         what = LC_ALL;
    char        *whatstr = "";
#ifdef LC_MESSAGES
# define VIM_LC_MESSAGES LC_MESSAGES
#else
# define VIM_LC_MESSAGES 6789
#endif

    name = eap->arg;

    /* Check for "messages {name}", "ctype {name}" or "time {name}" argument.
     * Allow abbreviation, but require at least 3 characters to avoid
     * confusion with a two letter language name "me" or "ct". */
    p = skiptowhite(eap->arg);
    if ((*p == NUL || vim_iswhite(*p)) && p - eap->arg >= 3)
    {
        if (STRNICMP(eap->arg, "messages", p - eap->arg) == 0)
        {
            what = VIM_LC_MESSAGES;
            name = skipwhite(p);
            whatstr = "messages ";
        }
        else if (STRNICMP(eap->arg, "ctype", p - eap->arg) == 0)
        {
            what = LC_CTYPE;
            name = skipwhite(p);
            whatstr = "ctype ";
        }
        else if (STRNICMP(eap->arg, "time", p - eap->arg) == 0)
        {
            what = LC_TIME;
            name = skipwhite(p);
            whatstr = "time ";
        }
    }

    if (*name == NUL)
    {
#ifndef LC_MESSAGES
        if (what == VIM_LC_MESSAGES)
            p = get_mess_env();
        else
#endif
            p = (char_u *)setlocale(what, NULL);
        if (p == NULL || *p == NUL)
            p = (char_u *)"Unknown";
        smsg((char_u *)_("Current %slanguage: \"%s\""), whatstr, p);
    }
    else
    {
#ifndef LC_MESSAGES
        if (what == VIM_LC_MESSAGES)
            loc = "";
        else
#endif
        {
            loc = setlocale(what, (char *)name);
#if defined(FEAT_FLOAT) && defined(LC_NUMERIC)
            /* Make sure strtod() uses a decimal point, not a comma. */
            setlocale(LC_NUMERIC, "C");
#endif
        }
        if (loc == NULL)
            EMSG2(_("E197: Cannot set language to \"%s\""), name);
        else
        {
#ifdef HAVE_NL_MSG_CAT_CNTR
            /* Need to do this for GNU gettext, otherwise cached translations
             * will be used again. */
            extern int _nl_msg_cat_cntr;

            ++_nl_msg_cat_cntr;
#endif
            /* Reset $LC_ALL, otherwise it would overrule everything. */
            vim_setenv((char_u *)"LC_ALL", (char_u *)"");

            if (what != LC_TIME)
            {
                /* Tell gettext() what to translate to.  It apparently doesn't
                 * use the currently effective locale.  Also do this when
                 * FEAT_GETTEXT isn't defined, so that shell commands use this
                 * value. */
                if (what == LC_ALL)
                {
                    vim_setenv((char_u *)"LANG", name);
# ifdef WIN32
                    /* Apparently MS-Windows printf() may cause a crash when
                     * we give it 8-bit text while it's expecting text in the
                     * current locale.  This call avoids that. */
                    setlocale(LC_CTYPE, "C");
# endif
                }
                if (what != LC_CTYPE)
                {
                    char_u      *mname;
#ifdef WIN32
                    mname = gettext_lang(name);
#else
                    mname = name;
#endif
                    vim_setenv((char_u *)"LC_MESSAGES", mname);
#ifdef FEAT_MULTI_LANG
                    set_helplang_default(mname);
#endif
                }

                /* Set $LC_CTYPE, because it overrules $LANG, and
                 * gtk_set_locale() calls setlocale() again.  gnome_init()
                 * sets $LC_CTYPE to "en_US" (that's a bug!). */
                if (what != VIM_LC_MESSAGES)
                    vim_setenv((char_u *)"LC_CTYPE", name);
# ifdef FEAT_GUI_GTK
                /* Let GTK know what locale we're using.  Not sure this is
                 * really needed... */
                if (gui.in_use)
                    (void)gtk_set_locale();
# endif
            }

# ifdef FEAT_EVAL
            /* Set v:lang, v:lc_time and v:ctype to the final result. */
            set_lang_var();
# endif
        }
    }
}

# if defined(FEAT_CMDL_COMPL) || defined(PROTO)
/*
 * Function given to ExpandGeneric() to obtain the possible arguments of the
 * ":language" command.
 */
    char_u *
get_lang_arg(xp, idx)
    expand_T    *xp UNUSED;
    int         idx;
{
    if (idx == 0)
        return (char_u *)"messages";
    if (idx == 1)
        return (char_u *)"ctype";
    if (idx == 2)
        return (char_u *)"time";
    return NULL;
}
# endif

#endif