feat/quickfix-title: fixed problem with compiling tiny version.

[vim_extended.git] / src / quickfix.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.
 */

/*
 * quickfix.c: functions for quickfix mode, using a file with error messages
 */

#include "vim.h"

#if defined(FEAT_QUICKFIX) || defined(PROTO)

struct dir_stack_T
{
    struct dir_stack_T  *next;
    char_u              *dirname;
};

static struct dir_stack_T   *dir_stack = NULL;

/*
 * For each error the next struct is allocated and linked in a list.
 */
typedef struct qfline_S qfline_T;
struct qfline_S
{
    qfline_T    *qf_next;       /* pointer to next error in the list */
    qfline_T    *qf_prev;       /* pointer to previous error in the list */
    linenr_T    qf_lnum;        /* line number where the error occurred */
    int         qf_fnum;        /* file number for the line */
    int         qf_col;         /* column where the error occurred */
    int         qf_nr;          /* error number */
    char_u      *qf_pattern;    /* search pattern for the error */
    char_u      *qf_text;       /* description of the error */
    char_u      qf_viscol;      /* set to TRUE if qf_col is screen column */
    char_u      qf_cleared;     /* set to TRUE if line has been deleted */
    char_u      qf_type;        /* type of the error (mostly 'E'); 1 for
                                   :helpgrep */
    char_u      qf_valid;       /* valid error message detected */
};

/*
 * There is a stack of error lists.
 */
#define LISTCOUNT   10

typedef struct qf_list_S
{
    qfline_T    *qf_start;          /* pointer to the first error */
    qfline_T    *qf_ptr;            /* pointer to the current error */
    int         qf_count;           /* number of errors (0 means no error list) */
    int         qf_index;           /* current index in the error list */
    int         qf_nonevalid;       /* TRUE if not a single valid entry found */
    char        *qf_title;          /* title derived from the command that created
                                     * the error list
                                     */
    char        *qf_user_title;     /* title specified by the :csettitle or
                                     * :lsettitle command
                                     */
    int         qf_use_user_title;  /* indicates that qf_user_title should
                                     * be used instead of qf_title
                                     */
} qf_list_T;

struct qf_info_S
{
    /*
     * Count of references to this list. Used only for location lists.
     * When a location list window reference this list, qf_refcount
     * will be 2. Otherwise, qf_refcount will be 1. When qf_refcount
     * reaches 0, the list is freed.
     */
    int         qf_refcount;
    int         qf_listcount;       /* current number of lists */
    int         qf_curlist;         /* current error list */
    qf_list_T   qf_lists[LISTCOUNT];
};

static qf_info_T ql_info;       /* global quickfix list */

#define FMT_PATTERNS 10         /* maximum number of % recognized */

/*
 * Structure used to hold the info of one part of 'errorformat'
 */
typedef struct efm_S efm_T;
struct efm_S
{
    regprog_T       *prog;      /* pre-formatted part of 'errorformat' */
    efm_T           *next;      /* pointer to next (NULL if last) */
    char_u          addr[FMT_PATTERNS]; /* indices of used % patterns */
    char_u          prefix;     /* prefix of this format line: */
                                /*   'D' enter directory */
                                /*   'X' leave directory */
                                /*   'A' start of multi-line message */
                                /*   'E' error message */
                                /*   'W' warning message */
                                /*   'I' informational message */
                                /*   'C' continuation line */
                                /*   'Z' end of multi-line message */
                                /*   'G' general, unspecific message */
                                /*   'P' push file (partial) message */
                                /*   'Q' pop/quit file (partial) message */
                                /*   'O' overread (partial) message */
    char_u          flags;      /* additional flags given in prefix */
                                /*   '-' do not include this line */
                                /*   '+' include whole line in message */
    int             conthere;   /* %> used */
};

static int      qf_init_ext __ARGS((qf_info_T *qi, char_u *efile, buf_T *buf, typval_T *tv, char_u *errorformat, int newlist, linenr_T lnumfirst, linenr_T lnumlast, char *qf_title));
static void     qf_new_list __ARGS((qf_info_T *qi, char *qf_title));
static void     ll_free_all __ARGS((qf_info_T **pqi));
static int      qf_add_entry __ARGS((qf_info_T *qi, qfline_T **prevp, char_u *dir, char_u *fname, int bufnum, char_u *mesg, long lnum, int col, int vis_col, char_u *pattern, int nr, int type, int valid));
static qf_info_T *ll_new_list __ARGS((void));
static void     qf_msg __ARGS((qf_info_T *qi));
static void     qf_free __ARGS((qf_info_T *qi, int idx));
static char_u   *qf_types __ARGS((int, int));
static int      qf_get_fnum __ARGS((char_u *, char_u *));
static char_u   *qf_push_dir __ARGS((char_u *, struct dir_stack_T **));
static char_u   *qf_pop_dir __ARGS((struct dir_stack_T **));
static char_u   *qf_guess_filepath __ARGS((char_u *));
static void     qf_fmt_text __ARGS((char_u *text, char_u *buf, int bufsize));
static void     qf_clean_dir_stack __ARGS((struct dir_stack_T **));
#ifdef FEAT_WINDOWS
static int      qf_win_pos_update __ARGS((qf_info_T *qi, int old_qf_index));
static int      is_qf_win __ARGS((win_T *win, qf_info_T *qi));
static win_T    *qf_find_win __ARGS((qf_info_T *qi));
static buf_T    *qf_find_buf __ARGS((qf_info_T *qi));
static void     qf_update_buffer __ARGS((qf_info_T *qi));
static void     qf_fill_buffer __ARGS((qf_info_T *qi));
#endif
static char_u   *get_mef_name __ARGS((void));
static buf_T    *load_dummy_buffer __ARGS((char_u *fname));
static void     wipe_dummy_buffer __ARGS((buf_T *buf));
static void     unload_dummy_buffer __ARGS((buf_T *buf));
static qf_info_T *ll_get_or_alloc_list __ARGS((win_T *));

/* Quickfix window check helper macro */
#define IS_QF_WINDOW(wp) (bt_quickfix(wp->w_buffer) && wp->w_llist_ref == NULL)
/* Location list window check helper macro */
#define IS_LL_WINDOW(wp) (bt_quickfix(wp->w_buffer) && wp->w_llist_ref != NULL)
/*
 * Return location list for window 'wp'
 * For location list window, return the referenced location list
 */
#define GET_LOC_LIST(wp) (IS_LL_WINDOW(wp) ? wp->w_llist_ref : wp->w_llist)

/*
 * Read the errorfile "efile" into memory, line by line, building the error
 * list. Set the error list's title to qf_title.
 * Return -1 for error, number of errors for success.
 */
    int
qf_init(wp, efile, errorformat, newlist, qf_title)
    win_T           *wp;
    char_u          *efile;
    char_u          *errorformat;
    int             newlist;            /* TRUE: start a new error list */
    char            *qf_title;
{
    qf_info_T       *qi = &ql_info;

    if (efile == NULL)
        return FAIL;

    if (wp != NULL)
    {
        qi = ll_get_or_alloc_list(wp);
        if (qi == NULL)
            return FAIL;
    }

    return qf_init_ext(qi, efile, curbuf, NULL, errorformat, newlist,
                                                    (linenr_T)0, (linenr_T)0,
                                                    qf_title);
}

/*
 * Returns the title of the qf_info_T's current qf_list_T.
 */
    char*
qf_get_name(qi)
    qf_info_T *qi;
{
    if (!qi)
        qi = &ql_info;

    if (qi->qf_lists[qi->qf_curlist].qf_use_user_title)
        return qi->qf_lists[qi->qf_curlist].qf_user_title;

    return qi->qf_lists[qi->qf_curlist].qf_title;
}

/*
 * Sets the title of a quickfix window / location list window.
 */
    void
ex_csettitle(eap)
    exarg_T     *eap;
{
    qf_info_T   *list_ref;
    win_T       *win;
    char_u      *err_msg;

    if (eap->cmdidx == CMD_csettitle)
    {
        list_ref = &ql_info;
        err_msg = e_quickfix;
    }
    else
    {
        list_ref = GET_LOC_LIST(curwin);
        err_msg = e_loclist;
    }

    if (!list_ref || !list_ref->qf_listcount)
    {
        EMSG(_(err_msg));
        return;
    }

    if (eap->forceit)
    {
        if (!list_ref->qf_lists[list_ref->qf_curlist].qf_use_user_title)
            return;

        /* restore the title derived from the command that created the error list */
        vim_free(list_ref->qf_lists[list_ref->qf_curlist].qf_user_title);
        list_ref->qf_lists[list_ref->qf_curlist].qf_user_title = NULL;
        list_ref->qf_lists[list_ref->qf_curlist].qf_use_user_title = FALSE;
    }
    else
    {
        /* set the user's title */
        vim_free(list_ref->qf_lists[list_ref->qf_curlist].qf_user_title);

        if (eap->arg && *eap->arg != NUL)
            list_ref->qf_lists[list_ref->qf_curlist].qf_user_title = (char *)vim_strsave(eap->arg);
        else
            list_ref->qf_lists[list_ref->qf_curlist].qf_user_title = NULL;

        list_ref->qf_lists[list_ref->qf_curlist].qf_use_user_title = TRUE;
    }

    if (eap->cmdidx == CMD_csettitle)
        list_ref = NULL;

    need_maketitle = TRUE;
    FOR_ALL_WINDOWS(win)
    {
        if (bt_quickfix(win->w_buffer) && list_ref == win->w_llist_ref)
            win_redr_status(win);
    }
}

/*
 * Read the errorfile "efile" into memory, line by line, building the error
 * list.
 * Alternative: when "efile" is null read errors from buffer "buf".
 * Always use 'errorformat' from "buf" if there is a local value.
 * Then lnumfirst and lnumlast specify the range of lines to use.
 * Set the title of the list to qf_title.
 * Return -1 for error, number of errors for success.
 */
    static int
qf_init_ext(qi, efile, buf, tv, errorformat, newlist, lnumfirst, lnumlast, qf_title)
    qf_info_T       *qi;
    char_u          *efile;
    buf_T           *buf;
    typval_T        *tv;
    char_u          *errorformat;
    int             newlist;            /* TRUE: start a new error list */
    linenr_T        lnumfirst;          /* first line number to use */
    linenr_T        lnumlast;           /* last line number to use */
    char            *qf_title;
{
    char_u          *namebuf;
    char_u          *errmsg;
    char_u          *pattern;
    char_u          *fmtstr = NULL;
    int             col = 0;
    char_u          use_viscol = FALSE;
    int             type = 0;
    int             valid;
    linenr_T        buflnum = lnumfirst;
    long            lnum = 0L;
    int             enr = 0;
    FILE            *fd = NULL;
    qfline_T        *qfprev = NULL;     /* init to make SASC shut up */
    char_u          *efmp;
    efm_T           *fmt_first = NULL;
    efm_T           *fmt_last = NULL;
    efm_T           *fmt_ptr;
    efm_T           *fmt_start = NULL;
    char_u          *efm;
    char_u          *ptr;
    char_u          *srcptr;
    int             len;
    int             i;
    int             round;
    int             idx = 0;
    int             multiline = FALSE;
    int             multiignore = FALSE;
    int             multiscan = FALSE;
    int             retval = -1;        /* default: return error flag */
    char_u          *directory = NULL;
    char_u          *currfile = NULL;
    char_u          *tail = NULL;
    char_u          *p_str = NULL;
    listitem_T      *p_li = NULL;
    struct dir_stack_T  *file_stack = NULL;
    regmatch_T      regmatch;
    static struct fmtpattern
    {
        char_u  convchar;
        char    *pattern;
    }               fmt_pat[FMT_PATTERNS] =
                    {
                        {'f', ".\\+"},      /* only used when at end */
                        {'n', "\\d\\+"},
                        {'l', "\\d\\+"},
                        {'c', "\\d\\+"},
                        {'t', "."},
                        {'m', ".\\+"},
                        {'r', ".*"},
                        {'p', "[- .]*"},
                        {'v', "\\d\\+"},
                        {'s', ".\\+"}
                    };

    namebuf = alloc(CMDBUFFSIZE + 1);
    errmsg = alloc(CMDBUFFSIZE + 1);
    pattern = alloc(CMDBUFFSIZE + 1);
    if (namebuf == NULL || errmsg == NULL || pattern == NULL)
        goto qf_init_end;

    if (efile != NULL && (fd = mch_fopen((char *)efile, "r")) == NULL)
    {
        EMSG2(_(e_openerrf), efile);
        goto qf_init_end;
    }

    if (newlist || qi->qf_curlist == qi->qf_listcount)
        /* make place for a new list */
        qf_new_list(qi, qf_title);
    else if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
        /* Adding to existing list, find last entry. */
        for (qfprev = qi->qf_lists[qi->qf_curlist].qf_start;
             qfprev->qf_next != qfprev;
             qfprev = qfprev->qf_next)
        { /* do nothing */ }

/*
 * Each part of the format string is copied and modified from errorformat to
 * regex prog.  Only a few % characters are allowed.
 */
    /* Use the local value of 'errorformat' if it's set. */
    if (errorformat == p_efm && tv == NULL && *buf->b_p_efm != NUL)
        efm = buf->b_p_efm;
    else
        efm = errorformat;
    /*
     * Get some space to modify the format string into.
     */
    i = (FMT_PATTERNS * 3) + ((int)STRLEN(efm) << 2);
    for (round = FMT_PATTERNS; round > 0; )
        i += (int)STRLEN(fmt_pat[--round].pattern);
#ifdef COLON_IN_FILENAME
    i += 12; /* "%f" can become twelve chars longer */
#else
    i += 2; /* "%f" can become two chars longer */
#endif
    if ((fmtstr = alloc(i)) == NULL)
        goto error2;

    while (efm[0] != NUL)
    {
        /*
         * Allocate a new eformat structure and put it at the end of the list
         */
        fmt_ptr = (efm_T *)alloc_clear((unsigned)sizeof(efm_T));
        if (fmt_ptr == NULL)
            goto error2;
        if (fmt_first == NULL)      /* first one */
            fmt_first = fmt_ptr;
        else
            fmt_last->next = fmt_ptr;
        fmt_last = fmt_ptr;

        /*
         * Isolate one part in the 'errorformat' option
         */
        for (len = 0; efm[len] != NUL && efm[len] != ','; ++len)
            if (efm[len] == '\\' && efm[len + 1] != NUL)
                ++len;

        /*
         * Build regexp pattern from current 'errorformat' option
         */
        ptr = fmtstr;
        *ptr++ = '^';
        round = 0;
        for (efmp = efm; efmp < efm + len; ++efmp)
        {
            if (*efmp == '%')
            {
                ++efmp;
                for (idx = 0; idx < FMT_PATTERNS; ++idx)
                    if (fmt_pat[idx].convchar == *efmp)
                        break;
                if (idx < FMT_PATTERNS)
                {
                    if (fmt_ptr->addr[idx])
                    {
                        sprintf((char *)errmsg,
                                _("E372: Too many %%%c in format string"), *efmp);
                        EMSG(errmsg);
                        goto error2;
                    }
                    if ((idx
                                && idx < 6
                                && vim_strchr((char_u *)"DXOPQ",
                                                     fmt_ptr->prefix) != NULL)
                            || (idx == 6
                                && vim_strchr((char_u *)"OPQ",
                                                    fmt_ptr->prefix) == NULL))
                    {
                        sprintf((char *)errmsg,
                                _("E373: Unexpected %%%c in format string"), *efmp);
                        EMSG(errmsg);
                        goto error2;
                    }
                    fmt_ptr->addr[idx] = (char_u)++round;
                    *ptr++ = '\\';
                    *ptr++ = '(';
#ifdef BACKSLASH_IN_FILENAME
                    if (*efmp == 'f')
                    {
                        /* Also match "c:" in the file name, even when
                         * checking for a colon next: "%f:".
                         * "\%(\a:\)\=" */
                        STRCPY(ptr, "\\%(\\a:\\)\\=");
                        ptr += 10;
                    }
#endif
                    if (*efmp == 'f' && efmp[1] != NUL)
                    {
                        if (efmp[1] != '\\' && efmp[1] != '%')
                        {
                            /* A file name may contain spaces, but this isn't
                             * in "\f".  For "%f:%l:%m" there may be a ":" in
                             * the file name.  Use ".\{-1,}x" instead (x is
                             * the next character), the requirement that :999:
                             * follows should work. */
                            STRCPY(ptr, ".\\{-1,}");
                            ptr += 7;
                        }
                        else
                        {
                            /* File name followed by '\\' or '%': include as
                             * many file name chars as possible. */
                            STRCPY(ptr, "\\f\\+");
                            ptr += 4;
                        }
                    }
                    else
                    {
                        srcptr = (char_u *)fmt_pat[idx].pattern;
                        while ((*ptr = *srcptr++) != NUL)
                            ++ptr;
                    }
                    *ptr++ = '\\';
                    *ptr++ = ')';
                }
                else if (*efmp == '*')
                {
                    if (*++efmp == '[' || *efmp == '\\')
                    {
                        if ((*ptr++ = *efmp) == '[')    /* %*[^a-z0-9] etc. */
                        {
                            if (efmp[1] == '^')
                                *ptr++ = *++efmp;
                            if (efmp < efm + len)
                            {
                                *ptr++ = *++efmp;           /* could be ']' */
                                while (efmp < efm + len
                                        && (*ptr++ = *++efmp) != ']')
                                    /* skip */;
                                if (efmp == efm + len)
                                {
                                    EMSG(_("E374: Missing ] in format string"));
                                    goto error2;
                                }
                            }
                        }
                        else if (efmp < efm + len)      /* %*\D, %*\s etc. */
                            *ptr++ = *++efmp;
                        *ptr++ = '\\';
                        *ptr++ = '+';
                    }
                    else
                    {
                        /* TODO: scanf()-like: %*ud, %*3c, %*f, ... ? */
                        sprintf((char *)errmsg,
                                _("E375: Unsupported %%%c in format string"), *efmp);
                        EMSG(errmsg);
                        goto error2;
                    }
                }
                else if (vim_strchr((char_u *)"%\\.^$~[", *efmp) != NULL)
                    *ptr++ = *efmp;             /* regexp magic characters */
                else if (*efmp == '#')
                    *ptr++ = '*';
                else if (*efmp == '>')
                    fmt_ptr->conthere = TRUE;
                else if (efmp == efm + 1)               /* analyse prefix */
                {
                    if (vim_strchr((char_u *)"+-", *efmp) != NULL)
                        fmt_ptr->flags = *efmp++;
                    if (vim_strchr((char_u *)"DXAEWICZGOPQ", *efmp) != NULL)
                        fmt_ptr->prefix = *efmp;
                    else
                    {
                        sprintf((char *)errmsg,
                                _("E376: Invalid %%%c in format string prefix"), *efmp);
                        EMSG(errmsg);
                        goto error2;
                    }
                }
                else
                {
                    sprintf((char *)errmsg,
                            _("E377: Invalid %%%c in format string"), *efmp);
                    EMSG(errmsg);
                    goto error2;
                }
            }
            else                        /* copy normal character */
            {
                if (*efmp == '\\' && efmp + 1 < efm + len)
                    ++efmp;
                else if (vim_strchr((char_u *)".*^$~[", *efmp) != NULL)
                    *ptr++ = '\\';      /* escape regexp atoms */
                if (*efmp)
                    *ptr++ = *efmp;
            }
        }
        *ptr++ = '$';
        *ptr = NUL;
        if ((fmt_ptr->prog = vim_regcomp(fmtstr, RE_MAGIC + RE_STRING)) == NULL)
            goto error2;
        /*
         * Advance to next part
         */
        efm = skip_to_option_part(efm + len);   /* skip comma and spaces */
    }
    if (fmt_first == NULL)      /* nothing found */
    {
        EMSG(_("E378: 'errorformat' contains no pattern"));
        goto error2;
    }

    /*
     * got_int is reset here, because it was probably set when killing the
     * ":make" command, but we still want to read the errorfile then.
     */
    got_int = FALSE;

    /* Always ignore case when looking for a matching error. */
    regmatch.rm_ic = TRUE;

    if (tv != NULL)
    {
        if (tv->v_type == VAR_STRING)
            p_str = tv->vval.v_string;
        else if (tv->v_type == VAR_LIST)
            p_li = tv->vval.v_list->lv_first;
    }

    /*
     * Read the lines in the error file one by one.
     * Try to recognize one of the error formats in each line.
     */
    while (!got_int)
    {
        /* Get the next line. */
        if (fd == NULL)
        {
            if (tv != NULL)
            {
                if (tv->v_type == VAR_STRING)
                {
                    /* Get the next line from the supplied string */
                    char_u *p;

                    if (!*p_str) /* Reached the end of the string */
                        break;

                    p = vim_strchr(p_str, '\n');
                    if (p)
                        len = (int)(p - p_str + 1);
                    else
                        len = (int)STRLEN(p_str);

                    if (len > CMDBUFFSIZE - 2)
                        vim_strncpy(IObuff, p_str, CMDBUFFSIZE - 2);
                    else
                        vim_strncpy(IObuff, p_str, len);

                    p_str += len;
                }
                else if (tv->v_type == VAR_LIST)
                {
                    /* Get the next line from the supplied list */
                    while (p_li && p_li->li_tv.v_type != VAR_STRING)
                        p_li = p_li->li_next;   /* Skip non-string items */

                    if (!p_li)                  /* End of the list */
                        break;

                    len = (int)STRLEN(p_li->li_tv.vval.v_string);
                    if (len > CMDBUFFSIZE - 2)
                        len = CMDBUFFSIZE - 2;

                    vim_strncpy(IObuff, p_li->li_tv.vval.v_string, len);

                    p_li = p_li->li_next;       /* next item */
                }
            }
            else
            {
                /* Get the next line from the supplied buffer */
                if (buflnum > lnumlast)
                    break;
                vim_strncpy(IObuff, ml_get_buf(buf, buflnum++, FALSE),
                            CMDBUFFSIZE - 2);
            }
        }
        else if (fgets((char *)IObuff, CMDBUFFSIZE - 2, fd) == NULL)
            break;

        IObuff[CMDBUFFSIZE - 2] = NUL;  /* for very long lines */
        if ((efmp = vim_strrchr(IObuff, '\n')) != NULL)
            *efmp = NUL;
#ifdef USE_CRNL
        if ((efmp = vim_strrchr(IObuff, '\r')) != NULL)
            *efmp = NUL;
#endif

        /* If there was no %> item start at the first pattern */
        if (fmt_start == NULL)
            fmt_ptr = fmt_first;
        else
        {
            fmt_ptr = fmt_start;
            fmt_start = NULL;
        }

        /*
         * Try to match each part of 'errorformat' until we find a complete
         * match or no match.
         */
        valid = TRUE;
restofline:
        for ( ; fmt_ptr != NULL; fmt_ptr = fmt_ptr->next)
        {
            idx = fmt_ptr->prefix;
            if (multiscan && vim_strchr((char_u *)"OPQ", idx) == NULL)
                continue;
            namebuf[0] = NUL;
            pattern[0] = NUL;
            if (!multiscan)
                errmsg[0] = NUL;
            lnum = 0;
            col = 0;
            use_viscol = FALSE;
            enr = -1;
            type = 0;
            tail = NULL;

            regmatch.regprog = fmt_ptr->prog;
            if (vim_regexec(&regmatch, IObuff, (colnr_T)0))
            {
                if ((idx == 'C' || idx == 'Z') && !multiline)
                    continue;
                if (vim_strchr((char_u *)"EWI", idx) != NULL)
                    type = idx;
                else
                    type = 0;
                /*
                 * Extract error message data from matched line.
                 * We check for an actual submatch, because "\[" and "\]" in
                 * the 'errorformat' may cause the wrong submatch to be used.
                 */
                if ((i = (int)fmt_ptr->addr[0]) > 0)            /* %f */
                {
                    int c;

                    if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
                        continue;

                    /* Expand ~/file and $HOME/file to full path. */
                    c = *regmatch.endp[i];
                    *regmatch.endp[i] = NUL;
                    expand_env(regmatch.startp[i], namebuf, CMDBUFFSIZE);
                    *regmatch.endp[i] = c;

                    if (vim_strchr((char_u *)"OPQ", idx) != NULL
                                                && mch_getperm(namebuf) == -1)
                        continue;
                }
                if ((i = (int)fmt_ptr->addr[1]) > 0)            /* %n */
                {
                    if (regmatch.startp[i] == NULL)
                        continue;
                    enr = (int)atol((char *)regmatch.startp[i]);
                }
                if ((i = (int)fmt_ptr->addr[2]) > 0)            /* %l */
                {
                    if (regmatch.startp[i] == NULL)
                        continue;
                    lnum = atol((char *)regmatch.startp[i]);
                }
                if ((i = (int)fmt_ptr->addr[3]) > 0)            /* %c */
                {
                    if (regmatch.startp[i] == NULL)
                        continue;
                    col = (int)atol((char *)regmatch.startp[i]);
                }
                if ((i = (int)fmt_ptr->addr[4]) > 0)            /* %t */
                {
                    if (regmatch.startp[i] == NULL)
                        continue;
                    type = *regmatch.startp[i];
                }
                if (fmt_ptr->flags == '+' && !multiscan)        /* %+ */
                    STRCPY(errmsg, IObuff);
                else if ((i = (int)fmt_ptr->addr[5]) > 0)       /* %m */
                {
                    if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
                        continue;
                    len = (int)(regmatch.endp[i] - regmatch.startp[i]);
                    vim_strncpy(errmsg, regmatch.startp[i], len);
                }
                if ((i = (int)fmt_ptr->addr[6]) > 0)            /* %r */
                {
                    if (regmatch.startp[i] == NULL)
                        continue;
                    tail = regmatch.startp[i];
                }
                if ((i = (int)fmt_ptr->addr[7]) > 0)            /* %p */
                {
                    if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
                        continue;
                    col = (int)(regmatch.endp[i] - regmatch.startp[i] + 1);
                    if (*((char_u *)regmatch.startp[i]) != TAB)
                        use_viscol = TRUE;
                }
                if ((i = (int)fmt_ptr->addr[8]) > 0)            /* %v */
                {
                    if (regmatch.startp[i] == NULL)
                        continue;
                    col = (int)atol((char *)regmatch.startp[i]);
                    use_viscol = TRUE;
                }
                if ((i = (int)fmt_ptr->addr[9]) > 0)            /* %s */
                {
                    if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
                        continue;
                    len = (int)(regmatch.endp[i] - regmatch.startp[i]);
                    if (len > CMDBUFFSIZE - 5)
                        len = CMDBUFFSIZE - 5;
                    STRCPY(pattern, "^\\V");
                    STRNCAT(pattern, regmatch.startp[i], len);
                    pattern[len + 3] = '\\';
                    pattern[len + 4] = '$';
                    pattern[len + 5] = NUL;
                }
                break;
            }
        }
        multiscan = FALSE;

        if (fmt_ptr == NULL || idx == 'D' || idx == 'X')
        {
            if (fmt_ptr != NULL)
            {
                if (idx == 'D')                         /* enter directory */
                {
                    if (*namebuf == NUL)
                    {
                        EMSG(_("E379: Missing or empty directory name"));
                        goto error2;
                    }
                    if ((directory = qf_push_dir(namebuf, &dir_stack)) == NULL)
                        goto error2;
                }
                else if (idx == 'X')                    /* leave directory */
                    directory = qf_pop_dir(&dir_stack);
            }
            namebuf[0] = NUL;           /* no match found, remove file name */
            lnum = 0;                   /* don't jump to this line */
            valid = FALSE;
            STRCPY(errmsg, IObuff);     /* copy whole line to error message */
            if (fmt_ptr == NULL)
                multiline = multiignore = FALSE;
        }
        else if (fmt_ptr != NULL)
        {
            /* honor %> item */
            if (fmt_ptr->conthere)
                fmt_start = fmt_ptr;

            if (vim_strchr((char_u *)"AEWI", idx) != NULL)
                multiline = TRUE;       /* start of a multi-line message */
            else if (vim_strchr((char_u *)"CZ", idx) != NULL)
            {                           /* continuation of multi-line msg */
                if (qfprev == NULL)
                    goto error2;
                if (*errmsg && !multiignore)
                {
                    len = (int)STRLEN(qfprev->qf_text);
                    if ((ptr = alloc((unsigned)(len + STRLEN(errmsg) + 2)))
                                                                    == NULL)
                        goto error2;
                    STRCPY(ptr, qfprev->qf_text);
                    vim_free(qfprev->qf_text);
                    qfprev->qf_text = ptr;
                    *(ptr += len) = '\n';
                    STRCPY(++ptr, errmsg);
                }
                if (qfprev->qf_nr == -1)
                    qfprev->qf_nr = enr;
                if (vim_isprintc(type) && !qfprev->qf_type)
                    qfprev->qf_type = type;  /* only printable chars allowed */
                if (!qfprev->qf_lnum)
                    qfprev->qf_lnum = lnum;
                if (!qfprev->qf_col)
                    qfprev->qf_col = col;
                qfprev->qf_viscol = use_viscol;
                if (!qfprev->qf_fnum)
                    qfprev->qf_fnum = qf_get_fnum(directory,
                                        *namebuf || directory ? namebuf
                                          : currfile && valid ? currfile : 0);
                if (idx == 'Z')
                    multiline = multiignore = FALSE;
                line_breakcheck();
                continue;
            }
            else if (vim_strchr((char_u *)"OPQ", idx) != NULL)
            {
                /* global file names */
                valid = FALSE;
                if (*namebuf == NUL || mch_getperm(namebuf) >= 0)
                {
                    if (*namebuf && idx == 'P')
                        currfile = qf_push_dir(namebuf, &file_stack);
                    else if (idx == 'Q')
                        currfile = qf_pop_dir(&file_stack);
                    *namebuf = NUL;
                    if (tail && *tail)
                    {
                        STRMOVE(IObuff, skipwhite(tail));
                        multiscan = TRUE;
                        goto restofline;
                    }
                }
            }
            if (fmt_ptr->flags == '-')  /* generally exclude this line */
            {
                if (multiline)
                    multiignore = TRUE; /* also exclude continuation lines */
                continue;
            }
        }

        if (qf_add_entry(qi, &qfprev,
                        directory,
                        (*namebuf || directory)
                            ? namebuf
                            : ((currfile && valid) ? currfile : (char_u *)NULL),
                        0,
                        errmsg,
                        lnum,
                        col,
                        use_viscol,
                        pattern,
                        enr,
                        type,
                        valid) == FAIL)
            goto error2;
        line_breakcheck();
    }
    if (fd == NULL || !ferror(fd))
    {
        if (qi->qf_lists[qi->qf_curlist].qf_index == 0)
        {
            /* no valid entry found */
            qi->qf_lists[qi->qf_curlist].qf_ptr =
                qi->qf_lists[qi->qf_curlist].qf_start;
            qi->qf_lists[qi->qf_curlist].qf_index = 1;
            qi->qf_lists[qi->qf_curlist].qf_nonevalid = TRUE;
        }
        else
        {
            qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
            if (qi->qf_lists[qi->qf_curlist].qf_ptr == NULL)
                qi->qf_lists[qi->qf_curlist].qf_ptr =
                    qi->qf_lists[qi->qf_curlist].qf_start;
        }
        /* return number of matches */
        retval = qi->qf_lists[qi->qf_curlist].qf_count;
        goto qf_init_ok;
    }
    EMSG(_(e_readerrf));
error2:
    qf_free(qi, qi->qf_curlist);
    qi->qf_listcount--;
    if (qi->qf_curlist > 0)
        --qi->qf_curlist;
qf_init_ok:
    if (fd != NULL)
        fclose(fd);
    for (fmt_ptr = fmt_first; fmt_ptr != NULL; fmt_ptr = fmt_first)
    {
        fmt_first = fmt_ptr->next;
        vim_free(fmt_ptr->prog);
        vim_free(fmt_ptr);
    }
    qf_clean_dir_stack(&dir_stack);
    qf_clean_dir_stack(&file_stack);
qf_init_end:
    vim_free(namebuf);
    vim_free(errmsg);
    vim_free(pattern);
    vim_free(fmtstr);

#ifdef FEAT_WINDOWS
    qf_update_buffer(qi);
#endif

    return retval;
}

/*
 * Prepare for adding a new quickfix list.
 */
    static void
qf_new_list(qi, qf_title)
    qf_info_T   *qi;
    char        *qf_title;
{
    int         i;

    /*
     * If the current entry is not the last entry, delete entries below
     * the current entry.  This makes it possible to browse in a tree-like
     * way with ":grep'.
     */
    while (qi->qf_listcount > qi->qf_curlist + 1)
        qf_free(qi, --qi->qf_listcount);

    /*
     * When the stack is full, remove to oldest entry
     * Otherwise, add a new entry.
     */
    if (qi->qf_listcount == LISTCOUNT)
    {
        qf_free(qi, 0);
        for (i = 1; i < LISTCOUNT; ++i)
            qi->qf_lists[i - 1] = qi->qf_lists[i];
        qi->qf_curlist = LISTCOUNT - 1;
    }
    else
        qi->qf_curlist = qi->qf_listcount++;
    qi->qf_lists[qi->qf_curlist].qf_index = 0;
    qi->qf_lists[qi->qf_curlist].qf_count = 0;
    if (qf_title)
    {
        if ((qi->qf_lists[qi->qf_curlist].qf_title = (char *)alloc(STRLEN(qf_title) + 2)))
            sprintf(qi->qf_lists[qi->qf_curlist].qf_title, ":%s", qf_title);
    }
    else
        qi->qf_lists[qi->qf_curlist].qf_title = NULL;

    qi->qf_lists[qi->qf_curlist].qf_user_title = NULL;
    qi->qf_lists[qi->qf_curlist].qf_use_user_title = FALSE;
}

/*
 * Free a location list
 */
    static void
ll_free_all(pqi)
    qf_info_T   **pqi;
{
    int         i;
    qf_info_T   *qi;

    qi = *pqi;
    if (qi == NULL)
        return;
    *pqi = NULL;        /* Remove reference to this list */

    qi->qf_refcount--;
    if (qi->qf_refcount < 1)
    {
        /* No references to this location list */
        for (i = 0; i < qi->qf_listcount; ++i)
            qf_free(qi, i);
        vim_free(qi);
    }
}

    void
qf_free_all(wp)
    win_T       *wp;
{
    int         i;
    qf_info_T   *qi = &ql_info;

    if (wp != NULL)
    {
        /* location list */
        ll_free_all(&wp->w_llist);
        ll_free_all(&wp->w_llist_ref);
    }
    else
        /* quickfix list */
        for (i = 0; i < qi->qf_listcount; ++i)
            qf_free(qi, i);
}

/*
 * Add an entry to the end of the list of errors.
 * Returns OK or FAIL.
 */
    static int
qf_add_entry(qi, prevp, dir, fname, bufnum, mesg, lnum, col, vis_col, pattern,
             nr, type, valid)
    qf_info_T   *qi;            /* quickfix list */
    qfline_T    **prevp;        /* pointer to previously added entry or NULL */
    char_u      *dir;           /* optional directory name */
    char_u      *fname;         /* file name or NULL */
    int         bufnum;         /* buffer number or zero */
    char_u      *mesg;          /* message */
    long        lnum;           /* line number */
    int         col;            /* column */
    int         vis_col;        /* using visual column */
    char_u      *pattern;       /* search pattern */
    int         nr;             /* error number */
    int         type;           /* type character */
    int         valid;          /* valid entry */
{
    qfline_T    *qfp;

    if ((qfp = (qfline_T *)alloc((unsigned)sizeof(qfline_T))) == NULL)
        return FAIL;
    if (bufnum != 0)
        qfp->qf_fnum = bufnum;
    else
        qfp->qf_fnum = qf_get_fnum(dir, fname);
    if ((qfp->qf_text = vim_strsave(mesg)) == NULL)
    {
        vim_free(qfp);
        return FAIL;
    }
    qfp->qf_lnum = lnum;
    qfp->qf_col = col;
    qfp->qf_viscol = vis_col;
    if (pattern == NULL || *pattern == NUL)
        qfp->qf_pattern = NULL;
    else if ((qfp->qf_pattern = vim_strsave(pattern)) == NULL)
    {
        vim_free(qfp->qf_text);
        vim_free(qfp);
        return FAIL;
    }
    qfp->qf_nr = nr;
    if (type != 1 && !vim_isprintc(type)) /* only printable chars allowed */
        type = 0;
    qfp->qf_type = type;
    qfp->qf_valid = valid;

    if (qi->qf_lists[qi->qf_curlist].qf_count == 0)
                                /* first element in the list */
    {
        qi->qf_lists[qi->qf_curlist].qf_start = qfp;
        qfp->qf_prev = qfp;     /* first element points to itself */
    }
    else
    {
        qfp->qf_prev = *prevp;
        (*prevp)->qf_next = qfp;
    }
    qfp->qf_next = qfp; /* last element points to itself */
    qfp->qf_cleared = FALSE;
    *prevp = qfp;
    ++qi->qf_lists[qi->qf_curlist].qf_count;
    if (qi->qf_lists[qi->qf_curlist].qf_index == 0 && qfp->qf_valid)
                                /* first valid entry */
    {
        qi->qf_lists[qi->qf_curlist].qf_index =
            qi->qf_lists[qi->qf_curlist].qf_count;
        qi->qf_lists[qi->qf_curlist].qf_ptr = qfp;
    }

    return OK;
}

/*
 * Allocate a new location list
 */
    static qf_info_T *
ll_new_list()
{
    qf_info_T *qi;

    qi = (qf_info_T *)alloc((unsigned)sizeof(qf_info_T));
    if (qi != NULL)
    {
        vim_memset(qi, 0, (size_t)(sizeof(qf_info_T)));
        qi->qf_refcount++;
    }

    return qi;
}

/*
 * Return the location list for window 'wp'.
 * If not present, allocate a location list
 */
    static qf_info_T *
ll_get_or_alloc_list(wp)
    win_T   *wp;
{
    if (IS_LL_WINDOW(wp))
        /* For a location list window, use the referenced location list */
        return wp->w_llist_ref;

    /*
     * For a non-location list window, w_llist_ref should not point to a
     * location list.
     */
    ll_free_all(&wp->w_llist_ref);

    if (wp->w_llist == NULL)
        wp->w_llist = ll_new_list();        /* new location list */
    return wp->w_llist;
}

/*
 * Copy the location list from window "from" to window "to".
 */
    void
copy_loclist(from, to)
    win_T       *from;
    win_T       *to;
{
    qf_info_T   *qi;
    int         idx;
    int         i;

    /*
     * When copying from a location list window, copy the referenced
     * location list. For other windows, copy the location list for
     * that window.
     */
    if (IS_LL_WINDOW(from))
        qi = from->w_llist_ref;
    else
        qi = from->w_llist;

    if (qi == NULL)                 /* no location list to copy */
        return;

    /* allocate a new location list */
    if ((to->w_llist = ll_new_list()) == NULL)
        return;

    to->w_llist->qf_listcount = qi->qf_listcount;

    /* Copy the location lists one at a time */
    for (idx = 0; idx < qi->qf_listcount; idx++)
    {
        qf_list_T   *from_qfl;
        qf_list_T   *to_qfl;

        to->w_llist->qf_curlist = idx;

        from_qfl = &qi->qf_lists[idx];
        to_qfl = &to->w_llist->qf_lists[idx];

        /* Some of the fields are populated by qf_add_entry() */
        to_qfl->qf_nonevalid = from_qfl->qf_nonevalid;
        to_qfl->qf_count = 0;
        to_qfl->qf_index = 0;
        to_qfl->qf_start = NULL;
        to_qfl->qf_ptr = NULL;
        if (from_qfl->qf_title)
            to_qfl->qf_title = (char *)vim_strsave((char_u *)from_qfl->qf_title);
        else
            to_qfl->qf_title = NULL;

        if (from_qfl->qf_user_title)
            to_qfl->qf_user_title = (char *)vim_strsave((char_u *)from_qfl->qf_user_title);
        else
            to_qfl->qf_user_title = NULL;
        to_qfl->qf_use_user_title = from_qfl->qf_use_user_title;

        if (from_qfl->qf_count)
        {
            qfline_T    *from_qfp;
            qfline_T    *prevp = NULL;

            /* copy all the location entries in this list */
            for (i = 0, from_qfp = from_qfl->qf_start; i < from_qfl->qf_count;
                 ++i, from_qfp = from_qfp->qf_next)
            {
                if (qf_add_entry(to->w_llist, &prevp,
                                 NULL,
                                 NULL,
                                 0,
                                 from_qfp->qf_text,
                                 from_qfp->qf_lnum,
                                 from_qfp->qf_col,
                                 from_qfp->qf_viscol,
                                 from_qfp->qf_pattern,
                                 from_qfp->qf_nr,
                                 0,
                                 from_qfp->qf_valid) == FAIL)
                {
                    qf_free_all(to);
                    return;
                }
                /*
                 * qf_add_entry() will not set the qf_num field, as the
                 * directory and file names are not supplied. So the qf_fnum
                 * field is copied here.
                 */
                prevp->qf_fnum = from_qfp->qf_fnum; /* file number */
                prevp->qf_type = from_qfp->qf_type; /* error type */
                if (from_qfl->qf_ptr == from_qfp)
                    to_qfl->qf_ptr = prevp;         /* current location */
            }
        }

        to_qfl->qf_index = from_qfl->qf_index;  /* current index in the list */

        /* When no valid entries are present in the list, qf_ptr points to
         * the first item in the list */
        if (to_qfl->qf_nonevalid == TRUE)
            to_qfl->qf_ptr = to_qfl->qf_start;
    }

    to->w_llist->qf_curlist = qi->qf_curlist;   /* current list */
}

/*
 * get buffer number for file "dir.name"
 */
    static int
qf_get_fnum(directory, fname)
    char_u   *directory;
    char_u   *fname;
{
    if (fname == NULL || *fname == NUL)         /* no file name */
        return 0;
    {
#ifdef RISCOS
        /* Name is reported as `main.c', but file is `c.main' */
        return ro_buflist_add(fname);
#else
        char_u      *ptr;
        int         fnum;

# ifdef VMS
        vms_remove_version(fname);
# endif
# ifdef BACKSLASH_IN_FILENAME
        if (directory != NULL)
            slash_adjust(directory);
        slash_adjust(fname);
# endif
        if (directory != NULL && !vim_isAbsName(fname)
                && (ptr = concat_fnames(directory, fname, TRUE)) != NULL)
        {
            /*
             * Here we check if the file really exists.
             * This should normally be true, but if make works without
             * "leaving directory"-messages we might have missed a
             * directory change.
             */
            if (mch_getperm(ptr) < 0)
            {
                vim_free(ptr);
                directory = qf_guess_filepath(fname);
                if (directory)
                    ptr = concat_fnames(directory, fname, TRUE);
                else
                    ptr = vim_strsave(fname);
            }
            /* Use concatenated directory name and file name */
            fnum = buflist_add(ptr, 0);
            vim_free(ptr);
            return fnum;
        }
        return buflist_add(fname, 0);
#endif
    }
}

/*
 * push dirbuf onto the directory stack and return pointer to actual dir or
 * NULL on error
 */
    static char_u *
qf_push_dir(dirbuf, stackptr)
    char_u              *dirbuf;
    struct dir_stack_T  **stackptr;
{
    struct dir_stack_T  *ds_new;
    struct dir_stack_T  *ds_ptr;

    /* allocate new stack element and hook it in */
    ds_new = (struct dir_stack_T *)alloc((unsigned)sizeof(struct dir_stack_T));
    if (ds_new == NULL)
        return NULL;

    ds_new->next = *stackptr;
    *stackptr = ds_new;

    /* store directory on the stack */
    if (vim_isAbsName(dirbuf)
            || (*stackptr)->next == NULL
            || (*stackptr && dir_stack != *stackptr))
        (*stackptr)->dirname = vim_strsave(dirbuf);
    else
    {
        /* Okay we don't have an absolute path.
         * dirbuf must be a subdir of one of the directories on the stack.
         * Let's search...
         */
        ds_new = (*stackptr)->next;
        (*stackptr)->dirname = NULL;
        while (ds_new)
        {
            vim_free((*stackptr)->dirname);
            (*stackptr)->dirname = concat_fnames(ds_new->dirname, dirbuf,
                    TRUE);
            if (mch_isdir((*stackptr)->dirname) == TRUE)
                break;

            ds_new = ds_new->next;
        }

        /* clean up all dirs we already left */
        while ((*stackptr)->next != ds_new)
        {
            ds_ptr = (*stackptr)->next;
            (*stackptr)->next = (*stackptr)->next->next;
            vim_free(ds_ptr->dirname);
            vim_free(ds_ptr);
        }

        /* Nothing found -> it must be on top level */
        if (ds_new == NULL)
        {
            vim_free((*stackptr)->dirname);
            (*stackptr)->dirname = vim_strsave(dirbuf);
        }
    }

    if ((*stackptr)->dirname != NULL)
        return (*stackptr)->dirname;
    else
    {
        ds_ptr = *stackptr;
        *stackptr = (*stackptr)->next;
        vim_free(ds_ptr);
        return NULL;
    }
}


/*
 * pop dirbuf from the directory stack and return previous directory or NULL if
 * stack is empty
 */
    static char_u *
qf_pop_dir(stackptr)
    struct dir_stack_T  **stackptr;
{
    struct dir_stack_T  *ds_ptr;

    /* TODO: Should we check if dirbuf is the directory on top of the stack?
     * What to do if it isn't? */

    /* pop top element and free it */
    if (*stackptr != NULL)
    {
        ds_ptr = *stackptr;
        *stackptr = (*stackptr)->next;
        vim_free(ds_ptr->dirname);
        vim_free(ds_ptr);
    }

    /* return NEW top element as current dir or NULL if stack is empty*/
    return *stackptr ? (*stackptr)->dirname : NULL;
}

/*
 * clean up directory stack
 */
    static void
qf_clean_dir_stack(stackptr)
    struct dir_stack_T  **stackptr;
{
    struct dir_stack_T  *ds_ptr;

    while ((ds_ptr = *stackptr) != NULL)
    {
        *stackptr = (*stackptr)->next;
        vim_free(ds_ptr->dirname);
        vim_free(ds_ptr);
    }
}

/*
 * Check in which directory of the directory stack the given file can be
 * found.
 * Returns a pointer to the directory name or NULL if not found
 * Cleans up intermediate directory entries.
 *
 * TODO: How to solve the following problem?
 * If we have the this directory tree:
 *     ./
 *     ./aa
 *     ./aa/bb
 *     ./bb
 *     ./bb/x.c
 * and make says:
 *     making all in aa
 *     making all in bb
 *     x.c:9: Error
 * Then qf_push_dir thinks we are in ./aa/bb, but we are in ./bb.
 * qf_guess_filepath will return NULL.
 */
    static char_u *
qf_guess_filepath(filename)
    char_u *filename;
{
    struct dir_stack_T     *ds_ptr;
    struct dir_stack_T     *ds_tmp;
    char_u                 *fullname;

    /* no dirs on the stack - there's nothing we can do */
    if (dir_stack == NULL)
        return NULL;

    ds_ptr = dir_stack->next;
    fullname = NULL;
    while (ds_ptr)
    {
        vim_free(fullname);
        fullname = concat_fnames(ds_ptr->dirname, filename, TRUE);

        /* If concat_fnames failed, just go on. The worst thing that can happen
         * is that we delete the entire stack.
         */
        if ((fullname != NULL) && (mch_getperm(fullname) >= 0))
            break;

        ds_ptr = ds_ptr->next;
    }

    vim_free(fullname);

    /* clean up all dirs we already left */
    while (dir_stack->next != ds_ptr)
    {
        ds_tmp = dir_stack->next;
        dir_stack->next = dir_stack->next->next;
        vim_free(ds_tmp->dirname);
        vim_free(ds_tmp);
    }

    return ds_ptr==NULL? NULL: ds_ptr->dirname;

}

/*
 * jump to a quickfix line
 * if dir == FORWARD go "errornr" valid entries forward
 * if dir == BACKWARD go "errornr" valid entries backward
 * if dir == FORWARD_FILE go "errornr" valid entries files backward
 * if dir == BACKWARD_FILE go "errornr" valid entries files backward
 * else if "errornr" is zero, redisplay the same line
 * else go to entry "errornr"
 */
    void
qf_jump(qi, dir, errornr, forceit)
    qf_info_T   *qi;
    int         dir;
    int         errornr;
    int         forceit;
{
    qf_info_T           *ll_ref;
    qfline_T            *qf_ptr;
    qfline_T            *old_qf_ptr;
    int                 qf_index;
    int                 old_qf_fnum;
    int                 old_qf_index;
    int                 prev_index;
    static char_u       *e_no_more_items = (char_u *)N_("E553: No more items");
    char_u              *err = e_no_more_items;
    linenr_T            i;
    buf_T               *old_curbuf;
    linenr_T            old_lnum;
    colnr_T             screen_col;
    colnr_T             char_col;
    char_u              *line;
#ifdef FEAT_WINDOWS
    char_u              *old_swb = p_swb;
    unsigned            old_swb_flags = swb_flags;
    int                 opened_window = FALSE;
    win_T               *win;
    win_T               *altwin;
    int                 flags;
#endif
    win_T               *oldwin = curwin;
    int                 print_message = TRUE;
    int                 len;
#ifdef FEAT_FOLDING
    int                 old_KeyTyped = KeyTyped; /* getting file may reset it */
#endif
    int                 ok = OK;
    int                 usable_win;

    if (qi == NULL)
        qi = &ql_info;

    if (qi->qf_curlist >= qi->qf_listcount
        || qi->qf_lists[qi->qf_curlist].qf_count == 0)
    {
        EMSG(_(e_quickfix));
        return;
    }

    qf_ptr = qi->qf_lists[qi->qf_curlist].qf_ptr;
    old_qf_ptr = qf_ptr;
    qf_index = qi->qf_lists[qi->qf_curlist].qf_index;
    old_qf_index = qf_index;
    if (dir == FORWARD || dir == FORWARD_FILE)      /* next valid entry */
    {
        while (errornr--)
        {
            old_qf_ptr = qf_ptr;
            prev_index = qf_index;
            old_qf_fnum = qf_ptr->qf_fnum;
            do
            {
                if (qf_index == qi->qf_lists[qi->qf_curlist].qf_count
                                                   || qf_ptr->qf_next == NULL)
                {
                    qf_ptr = old_qf_ptr;
                    qf_index = prev_index;
                    if (err != NULL)
                    {
                        EMSG(_(err));
                        goto theend;
                    }
                    errornr = 0;
                    break;
                }
                ++qf_index;
                qf_ptr = qf_ptr->qf_next;
            } while ((!qi->qf_lists[qi->qf_curlist].qf_nonevalid
                      && !qf_ptr->qf_valid)
                  || (dir == FORWARD_FILE && qf_ptr->qf_fnum == old_qf_fnum));
            err = NULL;
        }
    }
    else if (dir == BACKWARD || dir == BACKWARD_FILE)  /* prev. valid entry */
    {
        while (errornr--)
        {
            old_qf_ptr = qf_ptr;
            prev_index = qf_index;
            old_qf_fnum = qf_ptr->qf_fnum;
            do
            {
                if (qf_index == 1 || qf_ptr->qf_prev == NULL)
                {
                    qf_ptr = old_qf_ptr;
                    qf_index = prev_index;
                    if (err != NULL)
                    {
                        EMSG(_(err));
                        goto theend;
                    }
                    errornr = 0;
                    break;
                }
                --qf_index;
                qf_ptr = qf_ptr->qf_prev;
            } while ((!qi->qf_lists[qi->qf_curlist].qf_nonevalid
                      && !qf_ptr->qf_valid)
                  || (dir == BACKWARD_FILE && qf_ptr->qf_fnum == old_qf_fnum));
            err = NULL;
        }
    }
    else if (errornr != 0)      /* go to specified number */
    {
        while (errornr < qf_index && qf_index > 1 && qf_ptr->qf_prev != NULL)
        {
            --qf_index;
            qf_ptr = qf_ptr->qf_prev;
        }
        while (errornr > qf_index && qf_index <
                                    qi->qf_lists[qi->qf_curlist].qf_count
                                                   && qf_ptr->qf_next != NULL)
        {
            ++qf_index;
            qf_ptr = qf_ptr->qf_next;
        }
    }

#ifdef FEAT_WINDOWS
    qi->qf_lists[qi->qf_curlist].qf_index = qf_index;
    if (qf_win_pos_update(qi, old_qf_index))
        /* No need to print the error message if it's visible in the error
         * window */
        print_message = FALSE;

    /*
     * For ":helpgrep" find a help window or open one.
     */
    if (qf_ptr->qf_type == 1 && (!curwin->w_buffer->b_help || cmdmod.tab != 0))
    {
        win_T   *wp;

        if (cmdmod.tab != 0)
            wp = NULL;
        else
            for (wp = firstwin; wp != NULL; wp = wp->w_next)
                if (wp->w_buffer != NULL && wp->w_buffer->b_help)
                    break;
        if (wp != NULL && wp->w_buffer->b_nwindows > 0)
            win_enter(wp, TRUE);
        else
        {
            /*
             * Split off help window; put it at far top if no position
             * specified, the current window is vertically split and narrow.
             */
            flags = WSP_HELP;
# ifdef FEAT_VERTSPLIT
            if (cmdmod.split == 0 && curwin->w_width != Columns
                                                      && curwin->w_width < 80)
                flags |= WSP_TOP;
# endif
            if (qi != &ql_info)
                flags |= WSP_NEWLOC;  /* don't copy the location list */

            if (win_split(0, flags) == FAIL)
                goto theend;
            opened_window = TRUE;       /* close it when fail */

            if (curwin->w_height < p_hh)
                win_setheight((int)p_hh);

            if (qi != &ql_info)     /* not a quickfix list */
            {
                /* The new window should use the supplied location list */
                curwin->w_llist = qi;
                qi->qf_refcount++;
            }
        }

        if (!p_im)
            restart_edit = 0;       /* don't want insert mode in help file */
    }

    /*
     * If currently in the quickfix window, find another window to show the
     * file in.
     */
    if (bt_quickfix(curbuf) && !opened_window)
    {
        /*
         * If there is no file specified, we don't know where to go.
         * But do advance, otherwise ":cn" gets stuck.
         */
        if (qf_ptr->qf_fnum == 0)
            goto theend;

        /* Locate a window showing a normal buffer */
        usable_win = 0;
        FOR_ALL_WINDOWS(win)
            if (win->w_buffer->b_p_bt[0] == NUL)
            {
                usable_win = 1;
                break;
            }

        /*
         * If no usable window is found and 'switchbuf' contains "usetab"
         * then search in other tabs.
         */
        if (!usable_win && (swb_flags & SWB_USETAB))
        {
            tabpage_T   *tp;
            win_T       *wp;

            FOR_ALL_TAB_WINDOWS(tp, wp)
            {
                if (wp->w_buffer->b_fnum == qf_ptr->qf_fnum)
                {
                    goto_tabpage_win(tp, wp);
                    usable_win = 1;
                    goto win_found;
                }
            }
        }
win_found:

        /*
         * If there is only one window and it is the quickfix window, create a
         * new one above the quickfix window.
         */
        if (((firstwin == lastwin) && bt_quickfix(curbuf)) || !usable_win)
        {
            ll_ref = curwin->w_llist_ref;

            flags = WSP_ABOVE;
            if (ll_ref != NULL)
                flags |= WSP_NEWLOC;
            if (win_split(0, flags) == FAIL)
                goto failed;            /* not enough room for window */
            opened_window = TRUE;       /* close it when fail */
            p_swb = empty_option;       /* don't split again */
            swb_flags = 0;
# ifdef FEAT_SCROLLBIND
            curwin->w_p_scb = FALSE;
# endif
            if (ll_ref != NULL)
            {
                /* The new window should use the location list from the
                 * location list window */
                curwin->w_llist = ll_ref;
                ll_ref->qf_refcount++;
            }
        }
        else
        {
            if (curwin->w_llist_ref != NULL)
            {
                /* In a location window */
                ll_ref = curwin->w_llist_ref;

                /* Find the window with the same location list */
                FOR_ALL_WINDOWS(win)
                    if (win->w_llist == ll_ref)
                        break;
                if (win == NULL)
                {
                    /* Find the window showing the selected file */
                    FOR_ALL_WINDOWS(win)
                        if (win->w_buffer->b_fnum == qf_ptr->qf_fnum)
                            break;
                    if (win == NULL)
                    {
                        /* Find a previous usable window */
                        win = curwin;
                        do
                        {
                            if (win->w_buffer->b_p_bt[0] == NUL)
                                break;
                            if (win->w_prev == NULL)
                                win = lastwin;  /* wrap around the top */
                            else
                                win = win->w_prev; /* go to previous window */
                        } while (win != curwin);
                    }
                }
                win_goto(win);

                /* If the location list for the window is not set, then set it
                 * to the location list from the location window */
                if (win->w_llist == NULL)
                {
                    win->w_llist = ll_ref;
                    ll_ref->qf_refcount++;
                }
            }
            else
            {

            /*
             * Try to find a window that shows the right buffer.
             * Default to the window just above the quickfix buffer.
             */
            win = curwin;
            altwin = NULL;
            for (;;)
            {
                if (win->w_buffer->b_fnum == qf_ptr->qf_fnum)
                    break;
                if (win->w_prev == NULL)
                    win = lastwin;      /* wrap around the top */
                else
                    win = win->w_prev;  /* go to previous window */

                if (IS_QF_WINDOW(win))
                {
                    /* Didn't find it, go to the window before the quickfix
                     * window. */
                    if (altwin != NULL)
                        win = altwin;
                    else if (curwin->w_prev != NULL)
                        win = curwin->w_prev;
                    else
                        win = curwin->w_next;
                    break;
                }

                /* Remember a usable window. */
                if (altwin == NULL && !win->w_p_pvw
                                           && win->w_buffer->b_p_bt[0] == NUL)
                    altwin = win;
            }

            win_goto(win);
            }
        }
    }
#endif

    /*
     * If there is a file name,
     * read the wanted file if needed, and check autowrite etc.
     */
    old_curbuf = curbuf;
    old_lnum = curwin->w_cursor.lnum;

    if (qf_ptr->qf_fnum != 0)
    {
        if (qf_ptr->qf_type == 1)
        {
            /* Open help file (do_ecmd() will set b_help flag, readfile() will
             * set b_p_ro flag). */
            if (!can_abandon(curbuf, forceit))
            {
                EMSG(_(e_nowrtmsg));
                ok = FALSE;
            }
            else
                ok = do_ecmd(qf_ptr->qf_fnum, NULL, NULL, NULL, (linenr_T)1,
                                           ECMD_HIDE + ECMD_SET_HELP,
                                           oldwin == curwin ? curwin : NULL);
        }
        else
            ok = buflist_getfile(qf_ptr->qf_fnum,
                            (linenr_T)1, GETF_SETMARK | GETF_SWITCH, forceit);
    }

    if (ok == OK)
    {
        /* When not switched to another buffer, still need to set pc mark */
        if (curbuf == old_curbuf)
            setpcmark();

        if (qf_ptr->qf_pattern == NULL)
        {
            /*
             * Go to line with error, unless qf_lnum is 0.
             */
            i = qf_ptr->qf_lnum;
            if (i > 0)
            {
                if (i > curbuf->b_ml.ml_line_count)
                    i = curbuf->b_ml.ml_line_count;
                curwin->w_cursor.lnum = i;
            }
            if (qf_ptr->qf_col > 0)
            {
                curwin->w_cursor.col = qf_ptr->qf_col - 1;
                if (qf_ptr->qf_viscol == TRUE)
                {
                    /*
                     * Check each character from the beginning of the error
                     * line up to the error column.  For each tab character
                     * found, reduce the error column value by the length of
                     * a tab character.
                     */
                    line = ml_get_curline();
                    screen_col = 0;
                    for (char_col = 0; char_col < curwin->w_cursor.col; ++char_col)
                    {
                        if (*line == NUL)
                            break;
                        if (*line++ == '\t')
                        {
                            curwin->w_cursor.col -= 7 - (screen_col % 8);
                            screen_col += 8 - (screen_col % 8);
                        }
                        else
                            ++screen_col;
                    }
                }
                check_cursor();
            }
            else
                beginline(BL_WHITE | BL_FIX);
        }
        else
        {
            pos_T save_cursor;

            /* Move the cursor to the first line in the buffer */
            save_cursor = curwin->w_cursor;
            curwin->w_cursor.lnum = 0;
            if (!do_search(NULL, '/', qf_ptr->qf_pattern, (long)1,
                                                           SEARCH_KEEP, NULL))
                curwin->w_cursor = save_cursor;
        }

#ifdef FEAT_FOLDING
        if ((fdo_flags & FDO_QUICKFIX) && old_KeyTyped)
            foldOpenCursor();
#endif
        if (print_message)
        {
            /* Update the screen before showing the message */
            update_topline_redraw();
            sprintf((char *)IObuff, _("(%d of %d)%s%s: "), qf_index,
                    qi->qf_lists[qi->qf_curlist].qf_count,
                    qf_ptr->qf_cleared ? _(" (line deleted)") : "",
                    (char *)qf_types(qf_ptr->qf_type, qf_ptr->qf_nr));
            /* Add the message, skipping leading whitespace and newlines. */
            len = (int)STRLEN(IObuff);
            qf_fmt_text(skipwhite(qf_ptr->qf_text), IObuff + len, IOSIZE - len);

            /* Output the message.  Overwrite to avoid scrolling when the 'O'
             * flag is present in 'shortmess'; But when not jumping, print the
             * whole message. */
            i = msg_scroll;
            if (curbuf == old_curbuf && curwin->w_cursor.lnum == old_lnum)
                msg_scroll = TRUE;
            else if (!msg_scrolled && shortmess(SHM_OVERALL))
                msg_scroll = FALSE;
            msg_attr_keep(IObuff, 0, TRUE);
            msg_scroll = i;
        }
    }
    else
    {
#ifdef FEAT_WINDOWS
        if (opened_window)
            win_close(curwin, TRUE);    /* Close opened window */
#endif
        if (qf_ptr->qf_fnum != 0)
        {
            /*
             * Couldn't open file, so put index back where it was.  This could
             * happen if the file was readonly and we changed something.
             */
#ifdef FEAT_WINDOWS
failed:
#endif
            qf_ptr = old_qf_ptr;
            qf_index = old_qf_index;
        }
    }
theend:
    qi->qf_lists[qi->qf_curlist].qf_ptr = qf_ptr;
    qi->qf_lists[qi->qf_curlist].qf_index = qf_index;
#ifdef FEAT_WINDOWS
    if (p_swb != old_swb && opened_window)
    {
        /* Restore old 'switchbuf' value, but not when an autocommand or
         * modeline has changed the value. */
        if (p_swb == empty_option)
        {
            p_swb = old_swb;
            swb_flags = old_swb_flags;
        }
        else
            free_string_option(old_swb);
    }
#endif
}

/*
 * ":clist": list all errors
 * ":llist": list all locations
 */
    void
qf_list(eap)
    exarg_T     *eap;
{
    buf_T       *buf;
    char_u      *fname;
    qfline_T    *qfp;
    int         i;
    int         idx1 = 1;
    int         idx2 = -1;
    char_u      *arg = eap->arg;
    int         all = eap->forceit;     /* if not :cl!, only show
                                                   recognised errors */
    qf_info_T   *qi = &ql_info;

    if (eap->cmdidx == CMD_llist)
    {
        qi = GET_LOC_LIST(curwin);
        if (qi == NULL)
        {
            EMSG(_(e_loclist));
            return;
        }
    }

    if (qi->qf_curlist >= qi->qf_listcount
        || qi->qf_lists[qi->qf_curlist].qf_count == 0)
    {
        EMSG(_(e_quickfix));
        return;
    }
    if (!get_list_range(&arg, &idx1, &idx2) || *arg != NUL)
    {
        EMSG(_(e_trailing));
        return;
    }
    i = qi->qf_lists[qi->qf_curlist].qf_count;
    if (idx1 < 0)
        idx1 = (-idx1 > i) ? 0 : idx1 + i + 1;
    if (idx2 < 0)
        idx2 = (-idx2 > i) ? 0 : idx2 + i + 1;

    if (qi->qf_lists[qi->qf_curlist].qf_nonevalid)
        all = TRUE;
    qfp = qi->qf_lists[qi->qf_curlist].qf_start;
    for (i = 1; !got_int && i <= qi->qf_lists[qi->qf_curlist].qf_count; )
    {
        if ((qfp->qf_valid || all) && idx1 <= i && i <= idx2)
        {
            msg_putchar('\n');
            if (got_int)
                break;

            fname = NULL;
            if (qfp->qf_fnum != 0
                              && (buf = buflist_findnr(qfp->qf_fnum)) != NULL)
            {
                fname = buf->b_fname;
                if (qfp->qf_type == 1)  /* :helpgrep */
                    fname = gettail(fname);
            }
            if (fname == NULL)
                sprintf((char *)IObuff, "%2d", i);
            else
                vim_snprintf((char *)IObuff, IOSIZE, "%2d %s",
                                                            i, (char *)fname);
            msg_outtrans_attr(IObuff, i == qi->qf_lists[qi->qf_curlist].qf_index
                                           ? hl_attr(HLF_L) : hl_attr(HLF_D));
            if (qfp->qf_lnum == 0)
                IObuff[0] = NUL;
            else if (qfp->qf_col == 0)
                sprintf((char *)IObuff, ":%ld", qfp->qf_lnum);
            else
                sprintf((char *)IObuff, ":%ld col %d",
                                                   qfp->qf_lnum, qfp->qf_col);
            sprintf((char *)IObuff + STRLEN(IObuff), "%s:",
                                  (char *)qf_types(qfp->qf_type, qfp->qf_nr));
            msg_puts_attr(IObuff, hl_attr(HLF_N));
            if (qfp->qf_pattern != NULL)
            {
                qf_fmt_text(qfp->qf_pattern, IObuff, IOSIZE);
                STRCAT(IObuff, ":");
                msg_puts(IObuff);
            }
            msg_puts((char_u *)" ");

            /* Remove newlines and leading whitespace from the text.  For an
             * unrecognized line keep the indent, the compiler may mark a word
             * with ^^^^. */
            qf_fmt_text((fname != NULL || qfp->qf_lnum != 0)
                                     ? skipwhite(qfp->qf_text) : qfp->qf_text,
                                                              IObuff, IOSIZE);
            msg_prt_line(IObuff, FALSE);
            out_flush();                /* show one line at a time */
        }

        qfp = qfp->qf_next;
        ++i;
        ui_breakcheck();
    }
}

/*
 * Remove newlines and leading whitespace from an error message.
 * Put the result in "buf[bufsize]".
 */
    static void
qf_fmt_text(text, buf, bufsize)
    char_u      *text;
    char_u      *buf;
    int         bufsize;
{
    int         i;
    char_u      *p = text;

    for (i = 0; *p != NUL && i < bufsize - 1; ++i)
    {
        if (*p == '\n')
        {
            buf[i] = ' ';
            while (*++p != NUL)
                if (!vim_iswhite(*p) && *p != '\n')
                    break;
        }
        else
            buf[i] = *p++;
    }
    buf[i] = NUL;
}

/*
 * ":colder [count]": Up in the quickfix stack.
 * ":cnewer [count]": Down in the quickfix stack.
 * ":lolder [count]": Up in the location list stack.
 * ":lnewer [count]": Down in the location list stack.
 */
    void
qf_age(eap)
    exarg_T     *eap;
{
    qf_info_T   *qi = &ql_info;
    int         count;

    if (eap->cmdidx == CMD_lolder || eap->cmdidx == CMD_lnewer)
    {
        qi = GET_LOC_LIST(curwin);
        if (qi == NULL)
        {
            EMSG(_(e_loclist));
            return;
        }
    }

    if (eap->addr_count != 0)
        count = eap->line2;
    else
        count = 1;
    while (count--)
    {
        if (eap->cmdidx == CMD_colder || eap->cmdidx == CMD_lolder)
        {
            if (qi->qf_curlist == 0)
            {
                EMSG(_("E380: At bottom of quickfix stack"));
                return;
            }
            --qi->qf_curlist;
        }
        else
        {
            if (qi->qf_curlist >= qi->qf_listcount - 1)
            {
                EMSG(_("E381: At top of quickfix stack"));
                return;
            }
            ++qi->qf_curlist;
        }
    }
    qf_msg(qi);

}

    static void
qf_msg(qi)
    qf_info_T   *qi;
{
    smsg((char_u *)_("error list %d of %d; %d errors"),
            qi->qf_curlist + 1, qi->qf_listcount,
            qi->qf_lists[qi->qf_curlist].qf_count);
#ifdef FEAT_WINDOWS
    qf_update_buffer(qi);
#endif
}

/*
 * Free error list "idx".
 */
    static void
qf_free(qi, idx)
    qf_info_T   *qi;
    int         idx;
{
    qfline_T    *qfp;

    while (qi->qf_lists[idx].qf_count)
    {
        qfp = qi->qf_lists[idx].qf_start->qf_next;
        vim_free(qi->qf_lists[idx].qf_start->qf_text);
        vim_free(qi->qf_lists[idx].qf_start->qf_pattern);
        vim_free(qi->qf_lists[idx].qf_start);
        qi->qf_lists[idx].qf_start = qfp;
        --qi->qf_lists[idx].qf_count;
    }
    vim_free(qi->qf_lists[idx].qf_title);
    vim_free(qi->qf_lists[idx].qf_user_title);
}

/*
 * qf_mark_adjust: adjust marks
 */
   void
qf_mark_adjust(wp, line1, line2, amount, amount_after)
    win_T       *wp;
    linenr_T    line1;
    linenr_T    line2;
    long        amount;
    long        amount_after;
{
    int         i;
    qfline_T    *qfp;
    int         idx;
    qf_info_T   *qi = &ql_info;

    if (wp != NULL)
    {
        if (wp->w_llist == NULL)
            return;
        qi = wp->w_llist;
    }

    for (idx = 0; idx < qi->qf_listcount; ++idx)
        if (qi->qf_lists[idx].qf_count)
            for (i = 0, qfp = qi->qf_lists[idx].qf_start;
                       i < qi->qf_lists[idx].qf_count; ++i, qfp = qfp->qf_next)
                if (qfp->qf_fnum == curbuf->b_fnum)
                {
                    if (qfp->qf_lnum >= line1 && qfp->qf_lnum <= line2)
                    {
                        if (amount == MAXLNUM)
                            qfp->qf_cleared = TRUE;
                        else
                            qfp->qf_lnum += amount;
                    }
                    else if (amount_after && qfp->qf_lnum > line2)
                        qfp->qf_lnum += amount_after;
                }
}

/*
 * Make a nice message out of the error character and the error number:
 *  char    number      message
 *  e or E    0         " error"
 *  w or W    0         " warning"
 *  i or I    0         " info"
 *  0         0         ""
 *  other     0         " c"
 *  e or E    n         " error n"
 *  w or W    n         " warning n"
 *  i or I    n         " info n"
 *  0         n         " error n"
 *  other     n         " c n"
 *  1         x         ""      :helpgrep
 */
    static char_u *
qf_types(c, nr)
    int c, nr;
{
    static char_u       buf[20];
    static char_u       cc[3];
    char_u              *p;

    if (c == 'W' || c == 'w')
        p = (char_u *)" warning";
    else if (c == 'I' || c == 'i')
        p = (char_u *)" info";
    else if (c == 'E' || c == 'e' || (c == 0 && nr > 0))
        p = (char_u *)" error";
    else if (c == 0 || c == 1)
        p = (char_u *)"";
    else
    {
        cc[0] = ' ';
        cc[1] = c;
        cc[2] = NUL;
        p = cc;
    }

    if (nr <= 0)
        return p;

    sprintf((char *)buf, "%s %3d", (char *)p, nr);
    return buf;
}

#if defined(FEAT_WINDOWS) || defined(PROTO)
/*
 * ":cwindow": open the quickfix window if we have errors to display,
 *             close it if not.
 * ":lwindow": open the location list window if we have locations to display,
 *             close it if not.
 */
    void
ex_cwindow(eap)
    exarg_T     *eap;
{
    qf_info_T   *qi = &ql_info;
    win_T       *win;

    if (eap->cmdidx == CMD_lwindow)
    {
        qi = GET_LOC_LIST(curwin);
        if (qi == NULL)
            return;
    }

    /* Look for an existing quickfix window.  */
    win = qf_find_win(qi);

    /*
     * If a quickfix window is open but we have no errors to display,
     * close the window.  If a quickfix window is not open, then open
     * it if we have errors; otherwise, leave it closed.
     */
    if (qi->qf_lists[qi->qf_curlist].qf_nonevalid
            || qi->qf_curlist >= qi->qf_listcount)
    {
        if (win != NULL)
            ex_cclose(eap);
    }
    else if (win == NULL)
        ex_copen(eap);
}

/*
 * ":cclose": close the window showing the list of errors.
 * ":lclose": close the window showing the location list
 */
    void
ex_cclose(eap)
    exarg_T     *eap;
{
    win_T       *win = NULL;
    qf_info_T   *qi = &ql_info;

    if (eap->cmdidx == CMD_lclose || eap->cmdidx == CMD_lwindow)
    {
        qi = GET_LOC_LIST(curwin);
        if (qi == NULL)
            return;
    }

    /* Find existing quickfix window and close it. */
    win = qf_find_win(qi);
    if (win != NULL)
        win_close(win, FALSE);
}

/*
 * ":copen": open a window that shows the list of errors.
 * ":lopen": open a window that shows the location list.
 */
    void
ex_copen(eap)
    exarg_T     *eap;
{
    qf_info_T   *qi = &ql_info;
    int         height;
    win_T       *win;
    tabpage_T   *prevtab = curtab;
    buf_T       *qf_buf;
    win_T       *oldwin = curwin;

    if (eap->cmdidx == CMD_lopen || eap->cmdidx == CMD_lwindow)
    {
        qi = GET_LOC_LIST(curwin);
        if (qi == NULL)
        {
            EMSG(_(e_loclist));
            return;
        }
    }

    if (eap->addr_count != 0)
        height = eap->line2;
    else
        height = QF_WINHEIGHT;

#ifdef FEAT_VISUAL
    reset_VIsual_and_resel();                   /* stop Visual mode */
#endif
#ifdef FEAT_GUI
    need_mouse_correct = TRUE;
#endif

    /*
     * Find existing quickfix window, or open a new one.
     */
    win = qf_find_win(qi);

    if (win != NULL && cmdmod.tab == 0)
        win_goto(win);
    else
    {
        qf_buf = qf_find_buf(qi);

        /* The current window becomes the previous window afterwards. */
        win = curwin;

        if (eap->cmdidx == CMD_copen || eap->cmdidx == CMD_cwindow)
            /* Create the new window at the very bottom. */
            win_goto(lastwin);
        if (win_split(height, WSP_BELOW | WSP_NEWLOC) == FAIL)
            return;             /* not enough room for window */
#ifdef FEAT_SCROLLBIND
        curwin->w_p_scb = FALSE;
#endif

        if (eap->cmdidx == CMD_lopen || eap->cmdidx == CMD_lwindow)
        {
            /*
             * For the location list window, create a reference to the
             * location list from the window 'win'.
             */
            curwin->w_llist_ref = win->w_llist;
            win->w_llist->qf_refcount++;
        }

        if (oldwin != curwin)
            oldwin = NULL;  /* don't store info when in another window */
        if (qf_buf != NULL)
            /* Use the existing quickfix buffer */
            (void)do_ecmd(qf_buf->b_fnum, NULL, NULL, NULL, ECMD_ONE,
                                             ECMD_HIDE + ECMD_OLDBUF, oldwin);
        else
        {
            /* Create a new quickfix buffer */
            (void)do_ecmd(0, NULL, NULL, NULL, ECMD_ONE, ECMD_HIDE, oldwin);
            /* switch off 'swapfile' */
            set_option_value((char_u *)"swf", 0L, NULL, OPT_LOCAL);
            set_option_value((char_u *)"bt", 0L, (char_u *)"quickfix",
                                                                   OPT_LOCAL);
            set_option_value((char_u *)"bh", 0L, (char_u *)"wipe", OPT_LOCAL);
#ifdef FEAT_DIFF
            curwin->w_p_diff = FALSE;
#endif
#ifdef FEAT_FOLDING
            set_option_value((char_u *)"fdm", 0L, (char_u *)"manual",
                                                                   OPT_LOCAL);
#endif
        }

        /* Only set the height when still in the same tab page and there is no
         * window to the side. */
        if (curtab == prevtab
#ifdef FEAT_VERTSPLIT
                && curwin->w_width == Columns
#endif
           )
            win_setheight(height);
        curwin->w_p_wfh = TRUE;     /* set 'winfixheight' */
        if (win_valid(win))
            prevwin = win;
    }

    /*
     * Fill the buffer with the quickfix list.
     */
    qf_fill_buffer(qi);

    curwin->w_cursor.lnum = qi->qf_lists[qi->qf_curlist].qf_index;
    curwin->w_cursor.col = 0;
    check_cursor();
    update_topline();           /* scroll to show the line */
}

/*
 * Return the number of the current entry (line number in the quickfix
 * window).
 */
     linenr_T
qf_current_entry(wp)
    win_T       *wp;
{
    qf_info_T   *qi = &ql_info;

    if (IS_LL_WINDOW(wp))
        /* In the location list window, use the referenced location list */
        qi = wp->w_llist_ref;

    return qi->qf_lists[qi->qf_curlist].qf_index;
}

/*
 * Update the cursor position in the quickfix window to the current error.
 * Return TRUE if there is a quickfix window.
 */
    static int
qf_win_pos_update(qi, old_qf_index)
    qf_info_T   *qi;
    int         old_qf_index;   /* previous qf_index or zero */
{
    win_T       *win;
    int         qf_index = qi->qf_lists[qi->qf_curlist].qf_index;

    /*
     * Put the cursor on the current error in the quickfix window, so that
     * it's viewable.
     */
    win = qf_find_win(qi);
    if (win != NULL
            && qf_index <= win->w_buffer->b_ml.ml_line_count
            && old_qf_index != qf_index)
    {
        win_T   *old_curwin = curwin;

        curwin = win;
        curbuf = win->w_buffer;
        if (qf_index > old_qf_index)
        {
            curwin->w_redraw_top = old_qf_index;
            curwin->w_redraw_bot = qf_index;
        }
        else
        {
            curwin->w_redraw_top = qf_index;
            curwin->w_redraw_bot = old_qf_index;
        }
        curwin->w_cursor.lnum = qf_index;
        curwin->w_cursor.col = 0;
        update_topline();               /* scroll to show the line */
        redraw_later(VALID);
        curwin->w_redr_status = TRUE;   /* update ruler */
        curwin = old_curwin;
        curbuf = curwin->w_buffer;
    }
    return win != NULL;
}

/*
 * Check whether the given window is displaying the specified quickfix/location
 * list buffer
 */
    static int
is_qf_win(win, qi)
    win_T       *win;
    qf_info_T   *qi;
{
    /*
     * A window displaying the quickfix buffer will have the w_llist_ref field
     * set to NULL.
     * A window displaying a location list buffer will have the w_llist_ref
     * pointing to the location list.
     */
    if (bt_quickfix(win->w_buffer))
        if ((qi == &ql_info && win->w_llist_ref == NULL)
                || (qi != &ql_info && win->w_llist_ref == qi))
            return TRUE;

    return FALSE;
}

/*
 * Find a window displaying the quickfix/location list 'qi'
 * Searches in only the windows opened in the current tab.
 */
    static win_T *
qf_find_win(qi)
    qf_info_T   *qi;
{
    win_T       *win;

    FOR_ALL_WINDOWS(win)
        if (is_qf_win(win, qi))
            break;

    return win;
}

/*
 * Find a quickfix buffer.
 * Searches in windows opened in all the tabs.
 */
    static buf_T *
qf_find_buf(qi)
    qf_info_T   *qi;
{
    tabpage_T   *tp;
    win_T       *win;

    FOR_ALL_TAB_WINDOWS(tp, win)
        if (is_qf_win(win, qi))
            return win->w_buffer;

    return NULL;
}

/*
 * Find the quickfix buffer.  If it exists, update the contents.
 */
    static void
qf_update_buffer(qi)
    qf_info_T   *qi;
{
    buf_T       *buf;
    aco_save_T  aco;

    /* Check if a buffer for the quickfix list exists.  Update it. */
    buf = qf_find_buf(qi);
    if (buf != NULL)
    {
        /* set curwin/curbuf to buf and save a few things */
        aucmd_prepbuf(&aco, buf);

        qf_fill_buffer(qi);

        /* restore curwin/curbuf and a few other things */
        aucmd_restbuf(&aco);

        (void)qf_win_pos_update(qi, 0);
    }
}

/*
 * Fill current buffer with quickfix errors, replacing any previous contents.
 * curbuf must be the quickfix buffer!
 */
    static void
qf_fill_buffer(qi)
    qf_info_T   *qi;
{
    linenr_T    lnum;
    qfline_T    *qfp;
    buf_T       *errbuf;
    int         len;
    int         old_KeyTyped = KeyTyped;

    /* delete all existing lines */
    while ((curbuf->b_ml.ml_flags & ML_EMPTY) == 0)
        (void)ml_delete((linenr_T)1, FALSE);

    /* Check if there is anything to display */
    if (qi->qf_curlist < qi->qf_listcount)
    {
        /* Add one line for each error */
        qfp = qi->qf_lists[qi->qf_curlist].qf_start;
        for (lnum = 0; lnum < qi->qf_lists[qi->qf_curlist].qf_count; ++lnum)
        {
            if (qfp->qf_fnum != 0
                    && (errbuf = buflist_findnr(qfp->qf_fnum)) != NULL
                    && errbuf->b_fname != NULL)
            {
                if (qfp->qf_type == 1)  /* :helpgrep */
                    STRCPY(IObuff, gettail(errbuf->b_fname));
                else
                    STRCPY(IObuff, errbuf->b_fname);
                len = (int)STRLEN(IObuff);
            }
            else
                len = 0;
            IObuff[len++] = '|';

            if (qfp->qf_lnum > 0)
            {
                sprintf((char *)IObuff + len, "%ld", qfp->qf_lnum);
                len += (int)STRLEN(IObuff + len);

                if (qfp->qf_col > 0)
                {
                    sprintf((char *)IObuff + len, " col %d", qfp->qf_col);
                    len += (int)STRLEN(IObuff + len);
                }

                sprintf((char *)IObuff + len, "%s",
                                  (char *)qf_types(qfp->qf_type, qfp->qf_nr));
                len += (int)STRLEN(IObuff + len);
            }
            else if (qfp->qf_pattern != NULL)
            {
                qf_fmt_text(qfp->qf_pattern, IObuff + len, IOSIZE - len);
                len += (int)STRLEN(IObuff + len);
            }
            IObuff[len++] = '|';
            IObuff[len++] = ' ';

            /* Remove newlines and leading whitespace from the text.
             * For an unrecognized line keep the indent, the compiler may
             * mark a word with ^^^^. */
            qf_fmt_text(len > 3 ? skipwhite(qfp->qf_text) : qfp->qf_text,
                                                  IObuff + len, IOSIZE - len);

            if (ml_append(lnum, IObuff, (colnr_T)STRLEN(IObuff) + 1, FALSE)
                                                                      == FAIL)
                break;
            qfp = qfp->qf_next;
        }
        /* Delete the empty line which is now at the end */
        (void)ml_delete(lnum + 1, FALSE);
    }

    /* correct cursor position */
    check_lnums(TRUE);

    /* Set the 'filetype' to "qf" each time after filling the buffer.  This
     * resembles reading a file into a buffer, it's more logical when using
     * autocommands. */
    set_option_value((char_u *)"ft", 0L, (char_u *)"qf", OPT_LOCAL);
    curbuf->b_p_ma = FALSE;

#ifdef FEAT_AUTOCMD
    keep_filetype = TRUE;               /* don't detect 'filetype' */
    apply_autocmds(EVENT_BUFREADPOST, (char_u *)"quickfix", NULL,
                                                               FALSE, curbuf);
    apply_autocmds(EVENT_BUFWINENTER, (char_u *)"quickfix", NULL,
                                                               FALSE, curbuf);
    keep_filetype = FALSE;
#endif

    /* make sure it will be redrawn */
    redraw_curbuf_later(NOT_VALID);

    /* Restore KeyTyped, setting 'filetype' may reset it. */
    KeyTyped = old_KeyTyped;
}

#endif /* FEAT_WINDOWS */

/*
 * Return TRUE if "buf" is the quickfix buffer.
 */
    int
bt_quickfix(buf)
    buf_T       *buf;
{
    return (buf->b_p_bt[0] == 'q');
}

/*
 * Return TRUE if "buf" is a "nofile" or "acwrite" buffer.
 * This means the buffer name is not a file name.
 */
    int
bt_nofile(buf)
    buf_T       *buf;
{
    return (buf->b_p_bt[0] == 'n' && buf->b_p_bt[2] == 'f')
            || buf->b_p_bt[0] == 'a';
}

/*
 * Return TRUE if "buf" is a "nowrite" or "nofile" buffer.
 */
    int
bt_dontwrite(buf)
    buf_T       *buf;
{
    return (buf->b_p_bt[0] == 'n');
}

    int
bt_dontwrite_msg(buf)
    buf_T       *buf;
{
    if (bt_dontwrite(buf))
    {
        EMSG(_("E382: Cannot write, 'buftype' option is set"));
        return TRUE;
    }
    return FALSE;
}

/*
 * Return TRUE if the buffer should be hidden, according to 'hidden', ":hide"
 * and 'bufhidden'.
 */
    int
buf_hide(buf)
    buf_T       *buf;
{
    /* 'bufhidden' overrules 'hidden' and ":hide", check it first */
    switch (buf->b_p_bh[0])
    {
        case 'u':                   /* "unload" */
        case 'w':                   /* "wipe" */
        case 'd': return FALSE;     /* "delete" */
        case 'h': return TRUE;      /* "hide" */
    }
    return (p_hid || cmdmod.hide);
}

/*
 * Return TRUE when using ":vimgrep" for ":grep".
 */
    int
grep_internal(cmdidx)
    cmdidx_T    cmdidx;
{
    return ((cmdidx == CMD_grep
                || cmdidx == CMD_lgrep
                || cmdidx == CMD_grepadd
                || cmdidx == CMD_lgrepadd)
            && STRCMP("internal",
                        *curbuf->b_p_gp == NUL ? p_gp : curbuf->b_p_gp) == 0);
}

/*
 * Used for ":make", ":lmake", ":grep", ":lgrep", ":grepadd", and ":lgrepadd"
 */
    void
ex_make(eap)
    exarg_T     *eap;
{
    char_u      *fname;
    char_u      *cmd;
    unsigned    len;
    win_T       *wp = NULL;
    qf_info_T   *qi = &ql_info;
    int         res;
#ifdef FEAT_AUTOCMD
    char_u      *au_name = NULL;

    switch (eap->cmdidx)
    {
        case CMD_make:      au_name = (char_u *)"make"; break;
        case CMD_lmake:     au_name = (char_u *)"lmake"; break;
        case CMD_grep:      au_name = (char_u *)"grep"; break;
        case CMD_lgrep:     au_name = (char_u *)"lgrep"; break;
        case CMD_grepadd:   au_name = (char_u *)"grepadd"; break;
        case CMD_lgrepadd:  au_name = (char_u *)"lgrepadd"; break;
        default: break;
    }
    if (au_name != NULL)
    {
        apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
                                               curbuf->b_fname, TRUE, curbuf);
# ifdef FEAT_EVAL
        if (did_throw || force_abort)
            return;
# endif
    }
#endif

    /* Redirect ":grep" to ":vimgrep" if 'grepprg' is "internal". */
    if (grep_internal(eap->cmdidx))
    {
        ex_vimgrep(eap);
        return;
    }

    if (eap->cmdidx == CMD_lmake || eap->cmdidx == CMD_lgrep
        || eap->cmdidx == CMD_lgrepadd)
        wp = curwin;

    autowrite_all();
    fname = get_mef_name();
    if (fname == NULL)
        return;
    mch_remove(fname);      /* in case it's not unique */

    /*
     * If 'shellpipe' empty: don't redirect to 'errorfile'.
     */
    len = (unsigned)STRLEN(p_shq) * 2 + (unsigned)STRLEN(eap->arg) + 1;
    if (*p_sp != NUL)
        len += (unsigned)STRLEN(p_sp) + (unsigned)STRLEN(fname) + 3;
    cmd = alloc(len);
    if (cmd == NULL)
        return;
    sprintf((char *)cmd, "%s%s%s", (char *)p_shq, (char *)eap->arg,
                                                               (char *)p_shq);
    if (*p_sp != NUL)
        append_redir(cmd, len, p_sp, fname);
    /*
     * Output a newline if there's something else than the :make command that
     * was typed (in which case the cursor is in column 0).
     */
    if (msg_col == 0)
        msg_didout = FALSE;
    msg_start();
    MSG_PUTS(":!");
    msg_outtrans(cmd);          /* show what we are doing */

    /* let the shell know if we are redirecting output or not */
    do_shell(cmd, *p_sp != NUL ? SHELL_DOOUT : 0);

#ifdef AMIGA
    out_flush();
                /* read window status report and redraw before message */
    (void)char_avail();
#endif

    res = qf_init(wp, fname, (eap->cmdidx != CMD_make
                            && eap->cmdidx != CMD_lmake) ? p_gefm : p_efm,
                                           (eap->cmdidx != CMD_grepadd
                                            && eap->cmdidx != CMD_lgrepadd),
                                           (char *)*eap->cmdlinep);
#ifdef FEAT_AUTOCMD
    if (au_name != NULL)
        apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
                                               curbuf->b_fname, TRUE, curbuf);
#endif
    if (res > 0 && !eap->forceit)
    {
        if (wp != NULL)
            qi = GET_LOC_LIST(wp);
        qf_jump(qi, 0, 0, FALSE);               /* display first error */
    }

    mch_remove(fname);
    vim_free(fname);
    vim_free(cmd);
}

/*
 * Return the name for the errorfile, in allocated memory.
 * Find a new unique name when 'makeef' contains "##".
 * Returns NULL for error.
 */
    static char_u *
get_mef_name()
{
    char_u      *p;
    char_u      *name;
    static int  start = -1;
    static int  off = 0;
#ifdef HAVE_LSTAT
    struct stat sb;
#endif

    if (*p_mef == NUL)
    {
        name = vim_tempname('e');
        if (name == NULL)
            EMSG(_(e_notmp));
        return name;
    }

    for (p = p_mef; *p; ++p)
        if (p[0] == '#' && p[1] == '#')
            break;

    if (*p == NUL)
        return vim_strsave(p_mef);

    /* Keep trying until the name doesn't exist yet. */
    for (;;)
    {
        if (start == -1)
            start = mch_get_pid();
        else
            off += 19;

        name = alloc((unsigned)STRLEN(p_mef) + 30);
        if (name == NULL)
            break;
        STRCPY(name, p_mef);
        sprintf((char *)name + (p - p_mef), "%d%d", start, off);
        STRCAT(name, p + 2);
        if (mch_getperm(name) < 0
#ifdef HAVE_LSTAT
                    /* Don't accept a symbolic link, its a security risk. */
                    && mch_lstat((char *)name, &sb) < 0
#endif
                )
            break;
        vim_free(name);
    }
    return name;
}

/*
 * ":cc", ":crewind", ":cfirst" and ":clast".
 * ":ll", ":lrewind", ":lfirst" and ":llast".
 */
    void
ex_cc(eap)
    exarg_T     *eap;
{
    qf_info_T   *qi = &ql_info;

    if (eap->cmdidx == CMD_ll
            || eap->cmdidx == CMD_lrewind
            || eap->cmdidx == CMD_lfirst
            || eap->cmdidx == CMD_llast)
    {
        qi = GET_LOC_LIST(curwin);
        if (qi == NULL)
        {
            EMSG(_(e_loclist));
            return;
        }
    }

    qf_jump(qi, 0,
            eap->addr_count > 0
            ? (int)eap->line2
            : (eap->cmdidx == CMD_cc || eap->cmdidx == CMD_ll)
                ? 0
                : (eap->cmdidx == CMD_crewind || eap->cmdidx == CMD_lrewind
                   || eap->cmdidx == CMD_cfirst || eap->cmdidx == CMD_lfirst)
                    ? 1
                    : 32767,
            eap->forceit);
}

/*
 * ":cnext", ":cnfile", ":cNext" and ":cprevious".
 * ":lnext", ":lNext", ":lprevious", ":lnfile", ":lNfile" and ":lpfile".
 */
    void
ex_cnext(eap)
    exarg_T     *eap;
{
    qf_info_T   *qi = &ql_info;

    if (eap->cmdidx == CMD_lnext
            || eap->cmdidx == CMD_lNext
            || eap->cmdidx == CMD_lprevious
            || eap->cmdidx == CMD_lnfile
            || eap->cmdidx == CMD_lNfile
            || eap->cmdidx == CMD_lpfile)
    {
        qi = GET_LOC_LIST(curwin);
        if (qi == NULL)
        {
            EMSG(_(e_loclist));
            return;
        }
    }

    qf_jump(qi, (eap->cmdidx == CMD_cnext || eap->cmdidx == CMD_lnext)
            ? FORWARD
            : (eap->cmdidx == CMD_cnfile || eap->cmdidx == CMD_lnfile)
                ? FORWARD_FILE
                : (eap->cmdidx == CMD_cpfile || eap->cmdidx == CMD_lpfile
                   || eap->cmdidx == CMD_cNfile || eap->cmdidx == CMD_lNfile)
                    ? BACKWARD_FILE
                    : BACKWARD,
            eap->addr_count > 0 ? (int)eap->line2 : 1, eap->forceit);
}

/*
 * ":cfile"/":cgetfile"/":caddfile" commands.
 * ":lfile"/":lgetfile"/":laddfile" commands.
 */
    void
ex_cfile(eap)
    exarg_T     *eap;
{
    win_T       *wp = NULL;
    qf_info_T   *qi = &ql_info;

    if (eap->cmdidx == CMD_lfile || eap->cmdidx == CMD_lgetfile
        || eap->cmdidx == CMD_laddfile)
        wp = curwin;

    if (*eap->arg != NUL)
        set_string_option_direct((char_u *)"ef", -1, eap->arg, OPT_FREE, 0);

    /*
     * This function is used by the :cfile, :cgetfile and :caddfile
     * commands.
     * :cfile always creates a new quickfix list and jumps to the
     * first error.
     * :cgetfile creates a new quickfix list but doesn't jump to the
     * first error.
     * :caddfile adds to an existing quickfix list. If there is no
     * quickfix list then a new list is created.
     */
    if (qf_init(wp, p_ef, p_efm, (eap->cmdidx != CMD_caddfile
                                  && eap->cmdidx != CMD_laddfile),
                (char *)*eap->cmdlinep) > 0
                                  && (eap->cmdidx == CMD_cfile
                                             || eap->cmdidx == CMD_lfile))
    {
        if (wp != NULL)
            qi = GET_LOC_LIST(wp);
        qf_jump(qi, 0, 0, eap->forceit);        /* display first error */
    }
}

/*
 * ":vimgrep {pattern} file(s)"
 * ":vimgrepadd {pattern} file(s)"
 * ":lvimgrep {pattern} file(s)"
 * ":lvimgrepadd {pattern} file(s)"
 */
    void
ex_vimgrep(eap)
    exarg_T     *eap;
{
    regmmatch_T regmatch;
    int         fcount;
    char_u      **fnames;
    char_u      *fname;
    char_u      *s;
    char_u      *p;
    int         fi;
    qf_info_T   *qi = &ql_info;
    qfline_T    *prevp = NULL;
    long        lnum;
    buf_T       *buf;
    int         duplicate_name = FALSE;
    int         using_dummy;
    int         redraw_for_dummy = FALSE;
    int         found_match;
    buf_T       *first_match_buf = NULL;
    time_t      seconds = 0;
    int         save_mls;
#if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
    char_u      *save_ei = NULL;
#endif
    aco_save_T  aco;
    int         flags = 0;
    colnr_T     col;
    long        tomatch;
    char_u      dirname_start[MAXPATHL];
    char_u      dirname_now[MAXPATHL];
    char_u      *target_dir = NULL;
#ifdef FEAT_AUTOCMD
    char_u      *au_name =  NULL;

    switch (eap->cmdidx)
    {
        case CMD_vimgrep: au_name = (char_u *)"vimgrep"; break;
        case CMD_lvimgrep: au_name = (char_u *)"lvimgrep"; break;
        case CMD_vimgrepadd: au_name = (char_u *)"vimgrepadd"; break;
        case CMD_lvimgrepadd: au_name = (char_u *)"lvimgrepadd"; break;
        default: break;
    }
    if (au_name != NULL)
    {
        apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
                                               curbuf->b_fname, TRUE, curbuf);
        if (did_throw || force_abort)
            return;
    }
#endif

    if (eap->cmdidx == CMD_lgrep
            || eap->cmdidx == CMD_lvimgrep
            || eap->cmdidx == CMD_lgrepadd
            || eap->cmdidx == CMD_lvimgrepadd)
    {
        qi = ll_get_or_alloc_list(curwin);
        if (qi == NULL)
            return;
    }

    if (eap->addr_count > 0)
        tomatch = eap->line2;
    else
        tomatch = MAXLNUM;

    /* Get the search pattern: either white-separated or enclosed in // */
    regmatch.regprog = NULL;
    p = skip_vimgrep_pat(eap->arg, &s, &flags);
    if (p == NULL)
    {
        EMSG(_(e_invalpat));
        goto theend;
    }
    regmatch.regprog = vim_regcomp(s, RE_MAGIC);
    if (regmatch.regprog == NULL)
        goto theend;
    regmatch.rmm_ic = p_ic;
    regmatch.rmm_maxcol = 0;

    p = skipwhite(p);
    if (*p == NUL)
    {
        EMSG(_("E683: File name missing or invalid pattern"));
        goto theend;
    }

    if ((eap->cmdidx != CMD_grepadd && eap->cmdidx != CMD_lgrepadd &&
         eap->cmdidx != CMD_vimgrepadd && eap->cmdidx != CMD_lvimgrepadd)
                                        || qi->qf_curlist == qi->qf_listcount)
        /* make place for a new list */
        qf_new_list(qi, (char *)*eap->cmdlinep);
    else if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
        /* Adding to existing list, find last entry. */
        for (prevp = qi->qf_lists[qi->qf_curlist].qf_start;
                            prevp->qf_next != prevp; prevp = prevp->qf_next)
            ;

    /* parse the list of arguments */
    if (get_arglist_exp(p, &fcount, &fnames) == FAIL)
        goto theend;
    if (fcount == 0)
    {
        EMSG(_(e_nomatch));
        goto theend;
    }

    /* Remember the current directory, because a BufRead autocommand that does
     * ":lcd %:p:h" changes the meaning of short path names. */
    mch_dirname(dirname_start, MAXPATHL);

    seconds = (time_t)0;
    for (fi = 0; fi < fcount && !got_int && tomatch > 0; ++fi)
    {
        fname = shorten_fname1(fnames[fi]);
        if (time(NULL) > seconds)
        {
            /* Display the file name every second or so, show the user we are
             * working on it. */
            seconds = time(NULL);
            msg_start();
            p = msg_strtrunc(fname, TRUE);
            if (p == NULL)
                msg_outtrans(fname);
            else
            {
                msg_outtrans(p);
                vim_free(p);
            }
            msg_clr_eos();
            msg_didout = FALSE;     /* overwrite this message */
            msg_nowait = TRUE;      /* don't wait for this message */
            msg_col = 0;
            out_flush();
        }

        buf = buflist_findname_exp(fnames[fi]);
        if (buf == NULL || buf->b_ml.ml_mfp == NULL)
        {
            /* Remember that a buffer with this name already exists. */
            duplicate_name = (buf != NULL);
            using_dummy = TRUE;
            redraw_for_dummy = TRUE;

#if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
            /* Don't do Filetype autocommands to avoid loading syntax and
             * indent scripts, a great speed improvement. */
            save_ei = au_event_disable(",Filetype");
#endif
            /* Don't use modelines here, it's useless. */
            save_mls = p_mls;
            p_mls = 0;

            /* Load file into a buffer, so that 'fileencoding' is detected,
             * autocommands applied, etc. */
            buf = load_dummy_buffer(fname);

            /* When autocommands changed directory: go back.  We assume it was
             * ":lcd %:p:h". */
            mch_dirname(dirname_now, MAXPATHL);
            if (STRCMP(dirname_start, dirname_now) != 0)
            {
                exarg_T ea;

                ea.arg = dirname_start;
                ea.cmdidx = CMD_lcd;
                ex_cd(&ea);
            }

            p_mls = save_mls;
#if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
            au_event_restore(save_ei);
#endif
        }
        else
            /* Use existing, loaded buffer. */
            using_dummy = FALSE;

        if (buf == NULL)
        {
            if (!got_int)
                smsg((char_u *)_("Cannot open file \"%s\""), fname);
        }
        else
        {
            /* Try for a match in all lines of the buffer.
             * For ":1vimgrep" look for first match only. */
            found_match = FALSE;
            for (lnum = 1; lnum <= buf->b_ml.ml_line_count && tomatch > 0;
                                                                       ++lnum)
            {
                col = 0;
                while (vim_regexec_multi(&regmatch, curwin, buf, lnum,
                                                               col, NULL) > 0)
                {
                    ;
                    if (qf_add_entry(qi, &prevp,
                                NULL,       /* dir */
                                fname,
                                0,
                                ml_get_buf(buf,
                                     regmatch.startpos[0].lnum + lnum, FALSE),
                                regmatch.startpos[0].lnum + lnum,
                                regmatch.startpos[0].col + 1,
                                FALSE,      /* vis_col */
                                NULL,       /* search pattern */
                                0,          /* nr */
                                0,          /* type */
                                TRUE        /* valid */
                                ) == FAIL)
                    {
                        got_int = TRUE;
                        break;
                    }
                    found_match = TRUE;
                    if (--tomatch == 0)
                        break;
                    if ((flags & VGR_GLOBAL) == 0
                                               || regmatch.endpos[0].lnum > 0)
                        break;
                    col = regmatch.endpos[0].col
                                            + (col == regmatch.endpos[0].col);
                    if (col > (colnr_T)STRLEN(ml_get_buf(buf, lnum, FALSE)))
                        break;
                }
                line_breakcheck();
                if (got_int)
                    break;
            }

            if (using_dummy)
            {
                if (found_match && first_match_buf == NULL)
                    first_match_buf = buf;
                if (duplicate_name)
                {
                    /* Never keep a dummy buffer if there is another buffer
                     * with the same name. */
                    wipe_dummy_buffer(buf);
                    buf = NULL;
                }
                else if (!cmdmod.hide
                            || buf->b_p_bh[0] == 'u'    /* "unload" */
                            || buf->b_p_bh[0] == 'w'    /* "wipe" */
                            || buf->b_p_bh[0] == 'd')   /* "delete" */
                {
                    /* When no match was found we don't need to remember the
                     * buffer, wipe it out.  If there was a match and it
                     * wasn't the first one or we won't jump there: only
                     * unload the buffer.
                     * Ignore 'hidden' here, because it may lead to having too
                     * many swap files. */
                    if (!found_match)
                    {
                        wipe_dummy_buffer(buf);
                        buf = NULL;
                    }
                    else if (buf != first_match_buf || (flags & VGR_NOJUMP))
                    {
                        unload_dummy_buffer(buf);
                        buf = NULL;
                    }
                }

                if (buf != NULL)
                {
                    /* If the buffer is still loaded we need to use the
                     * directory we jumped to below. */
                    if (buf == first_match_buf
                            && target_dir == NULL
                            && STRCMP(dirname_start, dirname_now) != 0)
                        target_dir = vim_strsave(dirname_now);

                    /* The buffer is still loaded, the Filetype autocommands
                     * need to be done now, in that buffer.  And the modelines
                     * need to be done (again).  But not the window-local
                     * options! */
                    aucmd_prepbuf(&aco, buf);
#if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
                    apply_autocmds(EVENT_FILETYPE, buf->b_p_ft,
                                                     buf->b_fname, TRUE, buf);
#endif
                    do_modelines(OPT_NOWIN);
                    aucmd_restbuf(&aco);
                }
            }
        }
    }

    FreeWild(fcount, fnames);

    qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
    qi->qf_lists[qi->qf_curlist].qf_ptr = qi->qf_lists[qi->qf_curlist].qf_start;
    qi->qf_lists[qi->qf_curlist].qf_index = 1;

#ifdef FEAT_WINDOWS
    qf_update_buffer(qi);
#endif

#ifdef FEAT_AUTOCMD
    if (au_name != NULL)
        apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
                                               curbuf->b_fname, TRUE, curbuf);
#endif

    /* Jump to first match. */
    if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
    {
        if ((flags & VGR_NOJUMP) == 0)
        {
            buf = curbuf;
            qf_jump(qi, 0, 0, eap->forceit);
            if (buf != curbuf)
                /* If we jumped to another buffer redrawing will already be
                 * taken care of. */
                redraw_for_dummy = FALSE;

            /* Jump to the directory used after loading the buffer. */
            if (curbuf == first_match_buf && target_dir != NULL)
            {
                exarg_T ea;

                ea.arg = target_dir;
                ea.cmdidx = CMD_lcd;
                ex_cd(&ea);
            }
        }
    }
    else
        EMSG2(_(e_nomatch2), s);

    /* If we loaded a dummy buffer into the current window, the autocommands
     * may have messed up things, need to redraw and recompute folds. */
    if (redraw_for_dummy)
    {
#ifdef FEAT_FOLDING
        foldUpdateAll(curwin);
#else
        redraw_later(NOT_VALID);
#endif
    }

theend:
    vim_free(target_dir);
    vim_free(regmatch.regprog);
}

/*
 * Skip over the pattern argument of ":vimgrep /pat/[g][j]".
 * Put the start of the pattern in "*s", unless "s" is NULL.
 * If "flags" is not NULL put the flags in it: VGR_GLOBAL, VGR_NOJUMP.
 * If "s" is not NULL terminate the pattern with a NUL.
 * Return a pointer to the char just past the pattern plus flags.
 */
    char_u *
skip_vimgrep_pat(p, s, flags)
    char_u  *p;
    char_u  **s;
    int     *flags;
{
    int         c;

    if (vim_isIDc(*p))
    {
        /* ":vimgrep pattern fname" */
        if (s != NULL)
            *s = p;
        p = skiptowhite(p);
        if (s != NULL && *p != NUL)
            *p++ = NUL;
    }
    else
    {
        /* ":vimgrep /pattern/[g][j] fname" */
        if (s != NULL)
            *s = p + 1;
        c = *p;
        p = skip_regexp(p + 1, c, TRUE, NULL);
        if (*p != c)
            return NULL;

        /* Truncate the pattern. */
        if (s != NULL)
            *p = NUL;
        ++p;

        /* Find the flags */
        while (*p == 'g' || *p == 'j')
        {
            if (flags != NULL)
            {
                if (*p == 'g')
                    *flags |= VGR_GLOBAL;
                else
                    *flags |= VGR_NOJUMP;
            }
            ++p;
        }
    }
    return p;
}

/*
 * Load file "fname" into a dummy buffer and return the buffer pointer.
 * Returns NULL if it fails.
 * Must call unload_dummy_buffer() or wipe_dummy_buffer() later!
 */
    static buf_T *
load_dummy_buffer(fname)
    char_u      *fname;
{
    buf_T       *newbuf;
    int         failed = TRUE;
    aco_save_T  aco;

    /* Allocate a buffer without putting it in the buffer list. */
    newbuf = buflist_new(NULL, NULL, (linenr_T)1, BLN_DUMMY);
    if (newbuf == NULL)
        return NULL;

    /* Init the options. */
    buf_copy_options(newbuf, BCO_ENTER | BCO_NOHELP);

    /* need to open the memfile before putting the buffer in a window */
    if (ml_open(newbuf) == OK)
    {
        /* set curwin/curbuf to buf and save a few things */
        aucmd_prepbuf(&aco, newbuf);

        /* Need to set the filename for autocommands. */
        (void)setfname(curbuf, fname, NULL, FALSE);

        /* Create swap file now to avoid the ATTENTION message. */
        check_need_swap(TRUE);

        /* Remove the "dummy" flag, otherwise autocommands may not
         * work. */
        curbuf->b_flags &= ~BF_DUMMY;

        if (readfile(fname, NULL,
                    (linenr_T)0, (linenr_T)0, (linenr_T)MAXLNUM,
                    NULL, READ_NEW | READ_DUMMY) == OK
                && !got_int
                && !(curbuf->b_flags & BF_NEW))
        {
            failed = FALSE;
            if (curbuf != newbuf)
            {
                /* Bloody autocommands changed the buffer! */
                if (buf_valid(newbuf))
                    wipe_buffer(newbuf, FALSE);
                newbuf = curbuf;
            }
        }

        /* restore curwin/curbuf and a few other things */
        aucmd_restbuf(&aco);
    }

    if (!buf_valid(newbuf))
        return NULL;
    if (failed)
    {
        wipe_dummy_buffer(newbuf);
        return NULL;
    }
    return newbuf;
}

/*
 * Wipe out the dummy buffer that load_dummy_buffer() created.
 */
    static void
wipe_dummy_buffer(buf)
    buf_T       *buf;
{
    if (curbuf != buf)          /* safety check */
    {
#if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
        cleanup_T   cs;

        /* Reset the error/interrupt/exception state here so that aborting()
         * returns FALSE when wiping out the buffer.  Otherwise it doesn't
         * work when got_int is set. */
        enter_cleanup(&cs);
#endif

        wipe_buffer(buf, FALSE);

#if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
        /* Restore the error/interrupt/exception state if not discarded by a
         * new aborting error, interrupt, or uncaught exception. */
        leave_cleanup(&cs);
#endif
    }
}

/*
 * Unload the dummy buffer that load_dummy_buffer() created.
 */
    static void
unload_dummy_buffer(buf)
    buf_T       *buf;
{
    if (curbuf != buf)          /* safety check */
        close_buffer(NULL, buf, DOBUF_UNLOAD);
}

#if defined(FEAT_EVAL) || defined(PROTO)
/*
 * Add each quickfix error to list "list" as a dictionary.
 */
    int
get_errorlist(wp, list)
    win_T       *wp;
    list_T      *list;
{
    qf_info_T   *qi = &ql_info;
    dict_T      *dict;
    char_u      buf[2];
    qfline_T    *qfp;
    int         i;
    int         bufnum;

    if (wp != NULL)
    {
        qi = GET_LOC_LIST(wp);
        if (qi == NULL)
            return FAIL;
    }

    if (qi->qf_curlist >= qi->qf_listcount
            || qi->qf_lists[qi->qf_curlist].qf_count == 0)
        return FAIL;

    qfp = qi->qf_lists[qi->qf_curlist].qf_start;
    for (i = 1; !got_int && i <= qi->qf_lists[qi->qf_curlist].qf_count; ++i)
    {
        /* Handle entries with a non-existing buffer number. */
        bufnum = qfp->qf_fnum;
        if (bufnum != 0 && (buflist_findnr(bufnum) == NULL))
            bufnum = 0;

        if ((dict = dict_alloc()) == NULL)
            return FAIL;
        if (list_append_dict(list, dict) == FAIL)
            return FAIL;

        buf[0] = qfp->qf_type;
        buf[1] = NUL;
        if ( dict_add_nr_str(dict, "bufnr", (long)bufnum, NULL) == FAIL
          || dict_add_nr_str(dict, "lnum",  (long)qfp->qf_lnum, NULL) == FAIL
          || dict_add_nr_str(dict, "col",   (long)qfp->qf_col, NULL) == FAIL
          || dict_add_nr_str(dict, "vcol",  (long)qfp->qf_viscol, NULL) == FAIL
          || dict_add_nr_str(dict, "nr",    (long)qfp->qf_nr, NULL) == FAIL
          || dict_add_nr_str(dict, "pattern",  0L,
             qfp->qf_pattern == NULL ? (char_u *)"" : qfp->qf_pattern) == FAIL
          || dict_add_nr_str(dict, "text",  0L,
                   qfp->qf_text == NULL ? (char_u *)"" : qfp->qf_text) == FAIL
          || dict_add_nr_str(dict, "type",  0L, buf) == FAIL
          || dict_add_nr_str(dict, "valid", (long)qfp->qf_valid, NULL) == FAIL)
            return FAIL;

        qfp = qfp->qf_next;
    }
    return OK;
}

/*
 * Populate the quickfix list with the items supplied in the list
 * of dictionaries.
 */
    int
set_errorlist(wp, list, action)
    win_T       *wp;
    list_T      *list;
    int         action;
{
    listitem_T  *li;
    dict_T      *d;
    char_u      *filename, *pattern, *text, *type;
    int         bufnum;
    long        lnum;
    int         col, nr;
    int         vcol;
    qfline_T    *prevp = NULL;
    int         valid, status;
    int         retval = OK;
    qf_info_T   *qi = &ql_info;
    int         did_bufnr_emsg = FALSE;

    if (wp != NULL)
    {
        qi = ll_get_or_alloc_list(wp);
        if (qi == NULL)
            return FAIL;
    }

    if (action == ' ' || qi->qf_curlist == qi->qf_listcount)
        /* make place for a new list */
        qf_new_list(qi, NULL);
    else if (action == 'a' && qi->qf_lists[qi->qf_curlist].qf_count > 0)
        /* Adding to existing list, find last entry. */
        for (prevp = qi->qf_lists[qi->qf_curlist].qf_start;
             prevp->qf_next != prevp; prevp = prevp->qf_next)
            ;
    else if (action == 'r')
        qf_free(qi, qi->qf_curlist);

    for (li = list->lv_first; li != NULL; li = li->li_next)
    {
        if (li->li_tv.v_type != VAR_DICT)
            continue; /* Skip non-dict items */

        d = li->li_tv.vval.v_dict;
        if (d == NULL)
            continue;

        filename = get_dict_string(d, (char_u *)"filename", TRUE);
        bufnum = get_dict_number(d, (char_u *)"bufnr");
        lnum = get_dict_number(d, (char_u *)"lnum");
        col = get_dict_number(d, (char_u *)"col");
        vcol = get_dict_number(d, (char_u *)"vcol");
        nr = get_dict_number(d, (char_u *)"nr");
        type = get_dict_string(d, (char_u *)"type", TRUE);
        pattern = get_dict_string(d, (char_u *)"pattern", TRUE);
        text = get_dict_string(d, (char_u *)"text", TRUE);
        if (text == NULL)
            text = vim_strsave((char_u *)"");

        valid = TRUE;
        if ((filename == NULL && bufnum == 0) || (lnum == 0 && pattern == NULL))
            valid = FALSE;

        /* Mark entries with non-existing buffer number as not valid. Give the
         * error message only once. */
        if (bufnum != 0 && (buflist_findnr(bufnum) == NULL))
        {
            if (!did_bufnr_emsg)
            {
                did_bufnr_emsg = TRUE;
                EMSGN(_("E92: Buffer %ld not found"), bufnum);
            }
            valid = FALSE;
            bufnum = 0;
        }

        status =  qf_add_entry(qi, &prevp,
                               NULL,        /* dir */
                               filename,
                               bufnum,
                               text,
                               lnum,
                               col,
                               vcol,        /* vis_col */
                               pattern,     /* search pattern */
                               nr,
                               type == NULL ? NUL : *type,
                               valid);

        vim_free(filename);
        vim_free(pattern);
        vim_free(text);
        vim_free(type);

        if (status == FAIL)
        {
            retval = FAIL;
            break;
        }
    }

    qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
    qi->qf_lists[qi->qf_curlist].qf_ptr = qi->qf_lists[qi->qf_curlist].qf_start;
    qi->qf_lists[qi->qf_curlist].qf_index = 1;

#ifdef FEAT_WINDOWS
    qf_update_buffer(qi);
#endif

    return retval;
}
#endif

/*
 * ":[range]cbuffer [bufnr]" command.
 * ":[range]caddbuffer [bufnr]" command.
 * ":[range]cgetbuffer [bufnr]" command.
 * ":[range]lbuffer [bufnr]" command.
 * ":[range]laddbuffer [bufnr]" command.
 * ":[range]lgetbuffer [bufnr]" command.
 */
    void
ex_cbuffer(eap)
    exarg_T   *eap;
{
    buf_T       *buf = NULL;
    qf_info_T   *qi = &ql_info;

    if (eap->cmdidx == CMD_lbuffer || eap->cmdidx == CMD_lgetbuffer
            || eap->cmdidx == CMD_laddbuffer)
    {
        qi = ll_get_or_alloc_list(curwin);
        if (qi == NULL)
            return;
    }

    if (*eap->arg == NUL)
        buf = curbuf;
    else if (*skipwhite(skipdigits(eap->arg)) == NUL)
        buf = buflist_findnr(atoi((char *)eap->arg));
    if (buf == NULL)
        EMSG(_(e_invarg));
    else if (buf->b_ml.ml_mfp == NULL)
        EMSG(_("E681: Buffer is not loaded"));
    else
    {
        if (eap->addr_count == 0)
        {
            eap->line1 = 1;
            eap->line2 = buf->b_ml.ml_line_count;
        }
        if (eap->line1 < 1 || eap->line1 > buf->b_ml.ml_line_count
                || eap->line2 < 1 || eap->line2 > buf->b_ml.ml_line_count)
            EMSG(_(e_invrange));
        else
        {
            char *qf_title = (char *)*eap->cmdlinep;
            if (buf->b_sfname)
            {
                vim_snprintf((char *)IObuff, IOSIZE, "%s (%s)", qf_title,
                                                  (char *)buf->b_sfname);
                qf_title = (char *)IObuff;
            }

            if (qf_init_ext(qi, NULL, buf, NULL, p_efm,
                            (eap->cmdidx != CMD_caddbuffer
                             && eap->cmdidx != CMD_laddbuffer),
                                                   eap->line1, eap->line2,
                                                   qf_title) > 0
                    && (eap->cmdidx == CMD_cbuffer
                        || eap->cmdidx == CMD_lbuffer))
                qf_jump(qi, 0, 0, eap->forceit);  /* display first error */
        }
    }
}

#if defined(FEAT_EVAL) || defined(PROTO)
/*
 * ":cexpr {expr}", ":cgetexpr {expr}", ":caddexpr {expr}" command.
 * ":lexpr {expr}", ":lgetexpr {expr}", ":laddexpr {expr}" command.
 */
    void
ex_cexpr(eap)
    exarg_T     *eap;
{
    typval_T    *tv;
    qf_info_T   *qi = &ql_info;

    if (eap->cmdidx == CMD_lexpr || eap->cmdidx == CMD_lgetexpr
            || eap->cmdidx == CMD_laddexpr)
    {
        qi = ll_get_or_alloc_list(curwin);
        if (qi == NULL)
            return;
    }

    /* Evaluate the expression.  When the result is a string or a list we can
     * use it to fill the errorlist. */
    tv = eval_expr(eap->arg, NULL);
    if (tv != NULL)
    {
        if ((tv->v_type == VAR_STRING && tv->vval.v_string != NULL)
                || (tv->v_type == VAR_LIST && tv->vval.v_list != NULL))
        {
            if (qf_init_ext(qi, NULL, NULL, tv, p_efm,
                            (eap->cmdidx != CMD_caddexpr
                             && eap->cmdidx != CMD_laddexpr),
                                                 (linenr_T)0, (linenr_T)0,
                            (char *)*eap->cmdlinep) > 0
                    && (eap->cmdidx == CMD_cexpr
                        || eap->cmdidx == CMD_lexpr))
                qf_jump(qi, 0, 0, eap->forceit);  /* display first error */
        }
        else
            EMSG(_("E777: String or List expected"));
        free_tv(tv);
    }
}
#endif

/*
 * ":helpgrep {pattern}"
 */
    void
ex_helpgrep(eap)
    exarg_T     *eap;
{
    regmatch_T  regmatch;
    char_u      *save_cpo;
    char_u      *p;
    int         fcount;
    char_u      **fnames;
    FILE        *fd;
    int         fi;
    qfline_T    *prevp = NULL;
    long        lnum;
#ifdef FEAT_MULTI_LANG
    char_u      *lang;
#endif
    qf_info_T   *qi = &ql_info;
    int         new_qi = FALSE;
    win_T       *wp;

    /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
    save_cpo = p_cpo;
    p_cpo = empty_option;

#ifdef FEAT_MULTI_LANG
    /* Check for a specified language */
    lang = check_help_lang(eap->arg);
#endif

    if (eap->cmdidx == CMD_lhelpgrep)
    {
        /* Find an existing help window */
        FOR_ALL_WINDOWS(wp)
            if (wp->w_buffer != NULL && wp->w_buffer->b_help)
                break;

        if (wp == NULL)     /* Help window not found */
            qi = NULL;
        else
            qi = wp->w_llist;

        if (qi == NULL)
        {
            /* Allocate a new location list for help text matches */
            if ((qi = ll_new_list()) == NULL)
                return;
            new_qi = TRUE;
        }
    }

    regmatch.regprog = vim_regcomp(eap->arg, RE_MAGIC + RE_STRING);
    regmatch.rm_ic = FALSE;
    if (regmatch.regprog != NULL)
    {
        /* create a new quickfix list */
        qf_new_list(qi, (char *)*eap->cmdlinep);

        /* Go through all directories in 'runtimepath' */
        p = p_rtp;
        while (*p != NUL && !got_int)
        {
            copy_option_part(&p, NameBuff, MAXPATHL, ",");

            /* Find all "*.txt" and "*.??x" files in the "doc" directory. */
            add_pathsep(NameBuff);
            STRCAT(NameBuff, "doc/*.\\(txt\\|??x\\)");
            if (gen_expand_wildcards(1, &NameBuff, &fcount,
                                             &fnames, EW_FILE|EW_SILENT) == OK
                    && fcount > 0)
            {
                for (fi = 0; fi < fcount && !got_int; ++fi)
                {
#ifdef FEAT_MULTI_LANG
                    /* Skip files for a different language. */
                    if (lang != NULL
                            && STRNICMP(lang, fnames[fi]
                                            + STRLEN(fnames[fi]) - 3, 2) != 0
                            && !(STRNICMP(lang, "en", 2) == 0
                                && STRNICMP("txt", fnames[fi]
                                           + STRLEN(fnames[fi]) - 3, 3) == 0))
                            continue;
#endif
                    fd = mch_fopen((char *)fnames[fi], "r");
                    if (fd != NULL)
                    {
                        lnum = 1;
                        while (!vim_fgets(IObuff, IOSIZE, fd) && !got_int)
                        {
                            if (vim_regexec(&regmatch, IObuff, (colnr_T)0))
                            {
                                int     l = (int)STRLEN(IObuff);

                                /* remove trailing CR, LF, spaces, etc. */
                                while (l > 0 && IObuff[l - 1] <= ' ')
                                     IObuff[--l] = NUL;

                                if (qf_add_entry(qi, &prevp,
                                            NULL,       /* dir */
                                            fnames[fi],
                                            0,
                                            IObuff,
                                            lnum,
                                            (int)(regmatch.startp[0] - IObuff)
                                                                + 1, /* col */
                                            FALSE,      /* vis_col */
                                            NULL,       /* search pattern */
                                            0,          /* nr */
                                            1,          /* type */
                                            TRUE        /* valid */
                                            ) == FAIL)
                                {
                                    got_int = TRUE;
                                    break;
                                }
                            }
                            ++lnum;
                            line_breakcheck();
                        }
                        fclose(fd);
                    }
                }
                FreeWild(fcount, fnames);
            }
        }
        vim_free(regmatch.regprog);

        qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
        qi->qf_lists[qi->qf_curlist].qf_ptr =
            qi->qf_lists[qi->qf_curlist].qf_start;
        qi->qf_lists[qi->qf_curlist].qf_index = 1;
    }

    if (p_cpo == empty_option)
        p_cpo = save_cpo;
    else
        /* Darn, some plugin changed the value. */
        free_string_option(save_cpo);

#ifdef FEAT_WINDOWS
    qf_update_buffer(qi);
#endif

    /* Jump to first match. */
    if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
        qf_jump(qi, 0, 0, FALSE);
    else
        EMSG2(_(e_nomatch2), eap->arg);

    if (eap->cmdidx == CMD_lhelpgrep)
    {
        /* If the help window is not opened or if it already points to the
         * correct location list, then free the new location list. */
        if (!curwin->w_buffer->b_help || curwin->w_llist == qi)
        {
            if (new_qi)
                ll_free_all(&qi);
        }
        else if (curwin->w_llist == NULL)
            curwin->w_llist = qi;
    }
}

#endif /* FEAT_QUICKFIX */