patch 8.2.1078: highlight and match functionality together in one filev8.2.1078

Problem:    Highlight and match functionality together in one file.
Solution:   Move match functionality to a separate file. (Yegappan Lakshmanan,
            closes #6352)

13 files changed, 1396 insertions, 1359 deletions

diff --git a/Filelist b/Filelist
index 2dbb2d3432..1f75741573 100644
--- a/Filelist
+++ b/Filelist
@@ -80,6 +80,7 @@ SRC_ALL =	\
 		src/main.c \
 		src/map.c \
 		src/mark.c \
+		src/match.c \
 		src/mbyte.c \
 		src/memfile.c \
 		src/memfile_test.c \
@@ -247,6 +248,7 @@ SRC_ALL =	\
 		src/proto/main.pro \
 		src/proto/map.pro \
 		src/proto/mark.pro \
+		src/proto/match.pro \
 		src/proto/mbyte.pro \
 		src/proto/memfile.pro \
 		src/proto/memline.pro \
diff --git a/src/Make_cyg_ming.mak b/src/Make_cyg_ming.mak
index 890c9568e0..157dc94956 100644
--- a/src/Make_cyg_ming.mak
+++ b/src/Make_cyg_ming.mak
@@ -753,6 +753,7 @@ OBJ = \
 	$(OUTDIR)/main.o \
 	$(OUTDIR)/map.o \
 	$(OUTDIR)/mark.o \
+	$(OUTDIR)/match.o \
 	$(OUTDIR)/memfile.o \
 	$(OUTDIR)/memline.o \
 	$(OUTDIR)/menu.o \
diff --git a/src/Make_morph.mak b/src/Make_morph.mak
index ce615b2e37..bd95115a39 100644
--- a/src/Make_morph.mak
+++ b/src/Make_morph.mak
@@ -72,6 +72,7 @@ SRC =	arabic.c						\
 	main.c							\
 	map.c							\
 	mark.c							\
+	match.c							\
 	mbyte.c							\
 	memfile.c						\
 	memline.c						\
diff --git a/src/Make_mvc.mak b/src/Make_mvc.mak
index 3239974c9f..b1bb8836e0 100644
--- a/src/Make_mvc.mak
+++ b/src/Make_mvc.mak
@@ -775,6 +775,7 @@ OBJ = \
 	$(OUTDIR)\main.obj \
 	$(OUTDIR)\map.obj \
 	$(OUTDIR)\mark.obj \
+	$(OUTDIR)\match.obj \
 	$(OUTDIR)\mbyte.obj \
 	$(OUTDIR)\memfile.obj \
 	$(OUTDIR)\memline.obj \
@@ -1671,6 +1672,8 @@ $(OUTDIR)/map.obj:	$(OUTDIR) map.c  $(INCL)
 
 $(OUTDIR)/mark.obj:	$(OUTDIR) mark.c  $(INCL)
 
+$(OUTDIR)/match.obj:	$(OUTDIR) match.c  $(INCL)
+
 $(OUTDIR)/memfile.obj:	$(OUTDIR) memfile.c  $(INCL)
 
 $(OUTDIR)/memline.obj:	$(OUTDIR) memline.c  $(INCL)
@@ -1935,6 +1938,7 @@ proto.h: \
 	proto/main.pro \
 	proto/map.pro \
 	proto/mark.pro \
+	proto/match.pro \
 	proto/memfile.pro \
 	proto/memline.pro \
 	proto/menu.pro \
diff --git a/src/Make_vms.mms b/src/Make_vms.mms
index 1194acdd43..78f9dab5db 100644
--- a/src/Make_vms.mms
+++ b/src/Make_vms.mms
@@ -347,6 +347,7 @@ SRC = \
 	main.c \
 	map.c \
 	mark.c \
+	match.c \
 	mbyte.c \
 	memfile.c \
 	memline.c \
@@ -460,6 +461,7 @@ OBJ = \
 	main.obj \
 	map.obj \
 	mark.obj \
+	match.obj \
 	mbyte.obj \
 	memfile.obj \
 	memline.obj \
@@ -867,6 +869,9 @@ map.obj : map.c vim.h [.auto]config.h feature.h os_unix.h   \
 mark.obj : mark.c vim.h [.auto]config.h feature.h os_unix.h   \
  ascii.h keymap.h term.h macros.h structs.h regexp.h gui.h beval.h \
  [.proto]gui_beval.pro option.h ex_cmds.h proto.h globals.h
+match.obj : match.c vim.h [.auto]config.h feature.h os_unix.h   \
+ ascii.h keymap.h term.h macros.h structs.h regexp.h gui.h beval.h \
+ [.proto]gui_beval.pro option.h ex_cmds.h proto.h globals.h
 memfile.obj : memfile.c vim.h [.auto]config.h feature.h os_unix.h \
  ascii.h keymap.h term.h macros.h structs.h regexp.h \
  gui.h beval.h [.proto]gui_beval.pro option.h ex_cmds.h proto.h \
diff --git a/src/Makefile b/src/Makefile
index 354c13faf7..105820a93e 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1649,6 +1649,7 @@ BASIC_SRC = \
 	main.c \
 	map.c \
 	mark.c \
+	match.c \
 	mbyte.c \
 	memfile.c \
 	memline.c \
@@ -1797,6 +1798,7 @@ OBJ_COMMON = \
 	objects/list.o \
 	objects/map.o \
 	objects/mark.o \
+	objects/match.o \
 	objects/mbyte.o \
 	objects/memline.o \
 	objects/menu.o \
@@ -1971,6 +1973,7 @@ PRO_AUTO = \
 	main.pro \
 	map.pro \
 	mark.pro \
+	match.pro \
 	mbyte.pro \
 	memfile.pro \
 	memline.pro \
@@ -3379,6 +3382,9 @@ objects/map.o: map.c
 objects/mark.o: mark.c
 	$(CCC) -o $@ mark.c
 
+objects/match.o: match.c
+	$(CCC) -o $@ match.c
+
 objects/memfile.o: memfile.c
 	$(CCC) -o $@ memfile.c
 
@@ -3965,6 +3971,10 @@ objects/mark.o: mark.c vim.h protodef.h auto/config.h feature.h os_unix.h \
  auto/osdef.h ascii.h keymap.h term.h macros.h option.h beval.h \
  proto/gui_beval.pro structs.h regexp.h gui.h alloc.h ex_cmds.h spell.h \
  proto.h globals.h
+objects/match.o: match.c vim.h protodef.h auto/config.h feature.h \
+ os_unix.h auto/osdef.h ascii.h keymap.h term.h macros.h option.h beval.h \
+ proto/gui_beval.pro structs.h regexp.h gui.h alloc.h ex_cmds.h spell.h \
+ proto.h globals.h
 objects/mbyte.o: mbyte.c vim.h protodef.h auto/config.h feature.h os_unix.h \
  auto/osdef.h ascii.h keymap.h term.h macros.h option.h beval.h \
  proto/gui_beval.pro structs.h regexp.h gui.h alloc.h ex_cmds.h spell.h \
diff --git a/src/README.md b/src/README.md
index 6cc0704727..a196f2b954 100644
--- a/src/README.md
+++ b/src/README.md
@@ -51,8 +51,9 @@ getchar.c	| getting characters and key mapping
 highlight.c	| syntax highlighting
 indent.c	| text indentation
 insexpand.c	| Insert mode completion
-mark.c		| marks
 map.c		| mapping and abbreviations
+mark.c		| marks
+match.c		| highlight matching
 mbyte.c		| multi-byte character handling
 memfile.c	| storing lines for buffers in a swapfile
 memline.c	| storing lines for buffers in memory
diff --git a/src/highlight.c b/src/highlight.c
index 8c41c38fc8..6ddd44a827 100644
--- a/src/highlight.c
+++ b/src/highlight.c
@@ -9,7 +9,6 @@
 
 /*
  * Highlighting stuff.
- * Includes highlighting matches.
  */
 
 #include "vim.h"
@@ -3694,1345 +3693,3 @@ free_highlight_fonts(void)
 # endif
 }
 #endif
-
-
-#if defined(FEAT_SEARCH_EXTRA) || defined(PROTO)
-
-# define SEARCH_HL_PRIORITY 0
-
-/*
- * Add match to the match list of window 'wp'.  The pattern 'pat' will be
- * highlighted with the group 'grp' with priority 'prio'.
- * Optionally, a desired ID 'id' can be specified (greater than or equal to 1).
- * If no particular ID is desired, -1 must be specified for 'id'.
- * Return ID of added match, -1 on failure.
- */
-    static int
-match_add(
-    win_T	*wp,
-    char_u	*grp,
-    char_u	*pat,
-    int		prio,
-    int		id,
-    list_T	*pos_list,
-    char_u      *conceal_char UNUSED) // pointer to conceal replacement char
-{
-    matchitem_T	*cur;
-    matchitem_T	*prev;
-    matchitem_T	*m;
-    int		hlg_id;
-    regprog_T	*regprog = NULL;
-    int		rtype = SOME_VALID;
-
-    if (*grp == NUL || (pat != NULL && *pat == NUL))
-	return -1;
-    if (id < -1 || id == 0)
-    {
-	semsg(_("E799: Invalid ID: %d (must be greater than or equal to 1)"),
-									   id);
-	return -1;
-    }
-    if (id != -1)
-    {
-	cur = wp->w_match_head;
-	while (cur != NULL)
-	{
-	    if (cur->id == id)
-	    {
-		semsg(_("E801: ID already taken: %d"), id);
-		return -1;
-	    }
-	    cur = cur->next;
-	}
-    }
-    if ((hlg_id = syn_namen2id(grp, (int)STRLEN(grp))) == 0)
-    {
-	semsg(_(e_nogroup), grp);
-	return -1;
-    }
-    if (pat != NULL && (regprog = vim_regcomp(pat, RE_MAGIC)) == NULL)
-    {
-	semsg(_(e_invarg2), pat);
-	return -1;
-    }
-
-    // Find available match ID.
-    while (id == -1)
-    {
-	cur = wp->w_match_head;
-	while (cur != NULL && cur->id != wp->w_next_match_id)
-	    cur = cur->next;
-	if (cur == NULL)
-	    id = wp->w_next_match_id;
-	wp->w_next_match_id++;
-    }
-
-    // Build new match.
-    m = ALLOC_CLEAR_ONE(matchitem_T);
-    m->id = id;
-    m->priority = prio;
-    m->pattern = pat == NULL ? NULL : vim_strsave(pat);
-    m->hlg_id = hlg_id;
-    m->match.regprog = regprog;
-    m->match.rmm_ic = FALSE;
-    m->match.rmm_maxcol = 0;
-# if defined(FEAT_CONCEAL)
-    m->conceal_char = 0;
-    if (conceal_char != NULL)
-	m->conceal_char = (*mb_ptr2char)(conceal_char);
-# endif
-
-    // Set up position matches
-    if (pos_list != NULL)
-    {
-	linenr_T	toplnum = 0;
-	linenr_T	botlnum = 0;
-	listitem_T	*li;
-	int		i;
-
-	CHECK_LIST_MATERIALIZE(pos_list);
-	for (i = 0, li = pos_list->lv_first; li != NULL && i < MAXPOSMATCH;
-							i++, li = li->li_next)
-	{
-	    linenr_T	lnum = 0;
-	    colnr_T	col = 0;
-	    int		len = 1;
-	    list_T	*subl;
-	    listitem_T	*subli;
-	    int		error = FALSE;
-
-	    if (li->li_tv.v_type == VAR_LIST)
-	    {
-		subl = li->li_tv.vval.v_list;
-		if (subl == NULL)
-		    goto fail;
-		subli = subl->lv_first;
-		if (subli == NULL)
-		    goto fail;
-		lnum = tv_get_number_chk(&subli->li_tv, &error);
-		if (error == TRUE)
-		    goto fail;
-		if (lnum == 0)
-		{
-		    --i;
-		    continue;
-		}
-		m->pos.pos[i].lnum = lnum;
-		subli = subli->li_next;
-		if (subli != NULL)
-		{
-		    col = tv_get_number_chk(&subli->li_tv, &error);
-		    if (error == TRUE)
-			goto fail;
-		    subli = subli->li_next;
-		    if (subli != NULL)
-		    {
-			len = tv_get_number_chk(&subli->li_tv, &error);
-			if (error == TRUE)
-			    goto fail;
-		    }
-		}
-		m->pos.pos[i].col = col;
-		m->pos.pos[i].len = len;
-	    }
-	    else if (li->li_tv.v_type == VAR_NUMBER)
-	    {
-		if (li->li_tv.vval.v_number == 0)
-		{
-		    --i;
-		    continue;
-		}
-		m->pos.pos[i].lnum = li->li_tv.vval.v_number;
-		m->pos.pos[i].col = 0;
-		m->pos.pos[i].len = 0;
-	    }
-	    else
-	    {
-		emsg(_("E290: List or number required"));
-		goto fail;
-	    }
-	    if (toplnum == 0 || lnum < toplnum)
-		toplnum = lnum;
-	    if (botlnum == 0 || lnum >= botlnum)
-		botlnum = lnum + 1;
-	}
-
-	// Calculate top and bottom lines for redrawing area
-	if (toplnum != 0)
-	{
-	    if (wp->w_buffer->b_mod_set)
-	    {
-		if (wp->w_buffer->b_mod_top > toplnum)
-		    wp->w_buffer->b_mod_top = toplnum;
-		if (wp->w_buffer->b_mod_bot < botlnum)
-		    wp->w_buffer->b_mod_bot = botlnum;
-	    }
-	    else
-	    {
-		wp->w_buffer->b_mod_set = TRUE;
-		wp->w_buffer->b_mod_top = toplnum;
-		wp->w_buffer->b_mod_bot = botlnum;
-		wp->w_buffer->b_mod_xlines = 0;
-	    }
-	    m->pos.toplnum = toplnum;
-	    m->pos.botlnum = botlnum;
-	    rtype = VALID;
-	}
-    }
-
-    // Insert new match.  The match list is in ascending order with regard to
-    // the match priorities.
-    cur = wp->w_match_head;
-    prev = cur;
-    while (cur != NULL && prio >= cur->priority)
-    {
-	prev = cur;
-	cur = cur->next;
-    }
-    if (cur == prev)
-	wp->w_match_head = m;
-    else
-	prev->next = m;
-    m->next = cur;
-
-    redraw_win_later(wp, rtype);
-    return id;
-
-fail:
-    vim_free(m);
-    return -1;
-}
-
-/*
- * Delete match with ID 'id' in the match list of window 'wp'.
- * Print error messages if 'perr' is TRUE.
- */
-    static int
-match_delete(win_T *wp, int id, int perr)
-{
-    matchitem_T	*cur = wp->w_match_head;
-    matchitem_T	*prev = cur;
-    int		rtype = SOME_VALID;
-
-    if (id < 1)
-    {
-	if (perr == TRUE)
-	    semsg(_("E802: Invalid ID: %d (must be greater than or equal to 1)"),
-									  id);
-	return -1;
-    }
-    while (cur != NULL && cur->id != id)
-    {
-	prev = cur;
-	cur = cur->next;
-    }
-    if (cur == NULL)
-    {
-	if (perr == TRUE)
-	    semsg(_("E803: ID not found: %d"), id);
-	return -1;
-    }
-    if (cur == prev)
-	wp->w_match_head = cur->next;
-    else
-	prev->next = cur->next;
-    vim_regfree(cur->match.regprog);
-    vim_free(cur->pattern);
-    if (cur->pos.toplnum != 0)
-    {
-	if (wp->w_buffer->b_mod_set)
-	{
-	    if (wp->w_buffer->b_mod_top > cur->pos.toplnum)
-		wp->w_buffer->b_mod_top = cur->pos.toplnum;
-	    if (wp->w_buffer->b_mod_bot < cur->pos.botlnum)
-		wp->w_buffer->b_mod_bot = cur->pos.botlnum;
-	}
-	else
-	{
-	    wp->w_buffer->b_mod_set = TRUE;
-	    wp->w_buffer->b_mod_top = cur->pos.toplnum;
-	    wp->w_buffer->b_mod_bot = cur->pos.botlnum;
-	    wp->w_buffer->b_mod_xlines = 0;
-	}
-	rtype = VALID;
-    }
-    vim_free(cur);
-    redraw_win_later(wp, rtype);
-    return 0;
-}
-
-/*
- * Delete all matches in the match list of window 'wp'.
- */
-    void
-clear_matches(win_T *wp)
-{
-    matchitem_T *m;
-
-    while (wp->w_match_head != NULL)
-    {
-	m = wp->w_match_head->next;
-	vim_regfree(wp->w_match_head->match.regprog);
-	vim_free(wp->w_match_head->pattern);
-	vim_free(wp->w_match_head);
-	wp->w_match_head = m;
-    }
-    redraw_win_later(wp, SOME_VALID);
-}
-
-/*
- * Get match from ID 'id' in window 'wp'.
- * Return NULL if match not found.
- */
-    static matchitem_T *
-get_match(win_T *wp, int id)
-{
-    matchitem_T *cur = wp->w_match_head;
-
-    while (cur != NULL && cur->id != id)
-	cur = cur->next;
-    return cur;
-}
-
-/*
- * Init for calling prepare_search_hl().
- */
-    void
-init_search_hl(win_T *wp, match_T *search_hl)
-{
-    matchitem_T *cur;
-
-    // Setup for match and 'hlsearch' highlighting.  Disable any previous
-    // match
-    cur = wp->w_match_head;
-    while (cur != NULL)
-    {
-	cur->hl.rm = cur->match;
-	if (cur->hlg_id == 0)
-	    cur->hl.attr = 0;
-	else
-	    cur->hl.attr = syn_id2attr(cur->hlg_id);
-	cur->hl.buf = wp->w_buffer;
-	cur->hl.lnum = 0;
-	cur->hl.first_lnum = 0;
-# ifdef FEAT_RELTIME
-	// Set the time limit to 'redrawtime'.
-	profile_setlimit(p_rdt, &(cur->hl.tm));
-# endif
-	cur = cur->next;
-    }
-    search_hl->buf = wp->w_buffer;
-    search_hl->lnum = 0;
-    search_hl->first_lnum = 0;
-    // time limit is set at the toplevel, for all windows
-}
-
-/*
- * If there is a match fill "shl" and return one.
- * Return zero otherwise.
- */
-    static int
-next_search_hl_pos(
-    match_T	    *shl,	// points to a match
-    linenr_T	    lnum,
-    posmatch_T	    *posmatch,	// match positions
-    colnr_T	    mincol)	// minimal column for a match
-{
-    int	    i;
-    int	    found = -1;
-
-    for (i = posmatch->cur; i < MAXPOSMATCH; i++)
-    {
-	llpos_T	*pos = &posmatch->pos[i];
-
-	if (pos->lnum == 0)
-	    break;
-	if (pos->len == 0 && pos->col < mincol)
-	    continue;
-	if (pos->lnum == lnum)
-	{
-	    if (found >= 0)
-	    {
-		// if this match comes before the one at "found" then swap
-		// them
-		if (pos->col < posmatch->pos[found].col)
-		{
-		    llpos_T	tmp = *pos;
-
-		    *pos = posmatch->pos[found];
-		    posmatch->pos[found] = tmp;
-		}
-	    }
-	    else
-		found = i;
-	}
-    }
-    posmatch->cur = 0;
-    if (found >= 0)
-    {
-	colnr_T	start = posmatch->pos[found].col == 0
-					    ? 0 : posmatch->pos[found].col - 1;
-	colnr_T	end = posmatch->pos[found].col == 0
-				   ? MAXCOL : start + posmatch->pos[found].len;
-
-	shl->lnum = lnum;
-	shl->rm.startpos[0].lnum = 0;
-	shl->rm.startpos[0].col = start;
-	shl->rm.endpos[0].lnum = 0;
-	shl->rm.endpos[0].col = end;
-	shl->is_addpos = TRUE;
-	posmatch->cur = found + 1;
-	return 1;
-    }
-    return 0;
-}
-
-/*
- * Search for a next 'hlsearch' or match.
- * Uses shl->buf.
- * Sets shl->lnum and shl->rm contents.
- * Note: Assumes a previous match is always before "lnum", unless
- * shl->lnum is zero.
- * Careful: Any pointers for buffer lines will become invalid.
- */
-    static void
-next_search_hl(
-    win_T	    *win,
-    match_T	    *search_hl,
-    match_T	    *shl,	// points to search_hl or a match
-    linenr_T	    lnum,
-    colnr_T	    mincol,	// minimal column for a match
-    matchitem_T	    *cur)	// to retrieve match positions if any
-{
-    linenr_T	l;
-    colnr_T	matchcol;
-    long	nmatched;
-    int		called_emsg_before = called_emsg;
-
-    // for :{range}s/pat only highlight inside the range
-    if (lnum < search_first_line || lnum > search_last_line)
-    {
-	shl->lnum = 0;
-	return;
-    }
-
-    if (shl->lnum != 0)
-    {
-	// Check for three situations:
-	// 1. If the "lnum" is below a previous match, start a new search.
-	// 2. If the previous match includes "mincol", use it.
-	// 3. Continue after the previous match.
-	l = shl->lnum + shl->rm.endpos[0].lnum - shl->rm.startpos[0].lnum;
-	if (lnum > l)
-	    shl->lnum = 0;
-	else if (lnum < l || shl->rm.endpos[0].col > mincol)
-	    return;
-    }
-
-    /*
-     * Repeat searching for a match until one is found that includes "mincol"
-     * or none is found in this line.
-     */
-    for (;;)
-    {
-# ifdef FEAT_RELTIME
-	// Stop searching after passing the time limit.
-	if (profile_passed_limit(&(shl->tm)))
-	{
-	    shl->lnum = 0;		// no match found in time
-	    break;
-	}
-# endif
-	// Three situations:
-	// 1. No useful previous match: search from start of line.
-	// 2. Not Vi compatible or empty match: continue at next character.
-	//    Break the loop if this is beyond the end of the line.
-	// 3. Vi compatible searching: continue at end of previous match.
-	if (shl->lnum == 0)
-	    matchcol = 0;
-	else if (vim_strchr(p_cpo, CPO_SEARCH) == NULL
-		|| (shl->rm.endpos[0].lnum == 0
-		    && shl->rm.endpos[0].col <= shl->rm.startpos[0].col))
-	{
-	    char_u	*ml;
-
-	    matchcol = shl->rm.startpos[0].col;
-	    ml = ml_get_buf(shl->buf, lnum, FALSE) + matchcol;
-	    if (*ml == NUL)
-	    {
-		++matchcol;
-		shl->lnum = 0;
-		break;
-	    }
-	    if (has_mbyte)
-		matchcol += mb_ptr2len(ml);
-	    else
-		++matchcol;
-	}
-	else
-	    matchcol = shl->rm.endpos[0].col;
-
-	shl->lnum = lnum;
-	if (shl->rm.regprog != NULL)
-	{
-	    // Remember whether shl->rm is using a copy of the regprog in
-	    // cur->match.
-	    int regprog_is_copy = (shl != search_hl && cur != NULL
-				&& shl == &cur->hl
-				&& cur->match.regprog == cur->hl.rm.regprog);
-	    int timed_out = FALSE;
-
-	    nmatched = vim_regexec_multi(&shl->rm, win, shl->buf, lnum,
-		    matchcol,
-#ifdef FEAT_RELTIME
-		    &(shl->tm), &timed_out
-#else
-		    NULL, NULL
-#endif
-		    );
-	    // Copy the regprog, in case it got freed and recompiled.
-	    if (regprog_is_copy)
-		cur->match.regprog = cur->hl.rm.regprog;
-
-	    if (called_emsg > called_emsg_before || got_int || timed_out)
-	    {
-		// Error while handling regexp: stop using this regexp.
-		if (shl == search_hl)
-		{
-		    // don't free regprog in the match list, it's a copy
-		    vim_regfree(shl->rm.regprog);
-		    set_no_hlsearch(TRUE);
-		}
-		shl->rm.regprog = NULL;
-		shl->lnum = 0;
-		got_int = FALSE;  // avoid the "Type :quit to exit Vim" message
-		break;
-	    }
-	}
-	else if (cur != NULL)
-	    nmatched = next_search_hl_pos(shl, lnum, &(cur->pos), matchcol);
-	else
-	    nmatched = 0;
-	if (nmatched == 0)
-	{
-	    shl->lnum = 0;		// no match found
-	    break;
-	}
-	if (shl->rm.startpos[0].lnum > 0
-		|| shl->rm.startpos[0].col >= mincol
-		|| nmatched > 1
-		|| shl->rm.endpos[0].col > mincol)
-	{
-	    shl->lnum += shl->rm.startpos[0].lnum;
-	    break;			// useful match found
-	}
-    }
-}
-
-/*
- * Advance to the match in window "wp" line "lnum" or past it.
- */
-    void
-prepare_search_hl(win_T *wp, match_T *search_hl, linenr_T lnum)
-{
-    matchitem_T *cur;		// points to the match list
-    match_T	*shl;		// points to search_hl or a match
-    int		shl_flag;	// flag to indicate whether search_hl
-				// has been processed or not
-    int		pos_inprogress;	// marks that position match search is
-				// in progress
-    int		n;
-
-    // When using a multi-line pattern, start searching at the top
-    // of the window or just after a closed fold.
-    // Do this both for search_hl and the match list.
-    cur = wp->w_match_head;
-    shl_flag = WIN_IS_POPUP(wp);  // skip search_hl in a popup window
-    while (cur != NULL || shl_flag == FALSE)
-    {
-	if (shl_flag == FALSE)
-	{
-	    shl = search_hl;
-	    shl_flag = TRUE;
-	}
-	else
-	    shl = &cur->hl;
-	if (shl->rm.regprog != NULL
-		&& shl->lnum == 0
-		&& re_multiline(shl->rm.regprog))
-	{
-	    if (shl->first_lnum == 0)
-	    {
-# ifdef FEAT_FOLDING
-		for (shl->first_lnum = lnum;
-			   shl->first_lnum > wp->w_topline; --shl->first_lnum)
-		    if (hasFoldingWin(wp, shl->first_lnum - 1,
-						      NULL, NULL, TRUE, NULL))
-			break;
-# else
-		shl->first_lnum = wp->w_topline;
-# endif
-	    }
-	    if (cur != NULL)
-		cur->pos.cur = 0;
-	    pos_inprogress = TRUE;
-	    n = 0;
-	    while (shl->first_lnum < lnum && (shl->rm.regprog != NULL
-					  || (cur != NULL && pos_inprogress)))
-	    {
-		next_search_hl(wp, search_hl, shl, shl->first_lnum, (colnr_T)n,
-					       shl == search_hl ? NULL : cur);
-		pos_inprogress = cur == NULL || cur->pos.cur == 0
-							      ? FALSE : TRUE;
-		if (shl->lnum != 0)
-		{
-		    shl->first_lnum = shl->lnum
-				    + shl->rm.endpos[0].lnum
-				    - shl->rm.startpos[0].lnum;
-		    n = shl->rm.endpos[0].col;
-		}
-		else
-		{
-		    ++shl->first_lnum;
-		    n = 0;
-		}
-	    }
-	}
-	if (shl != search_hl && cur != NULL)
-	    cur = cur->next;
-    }
-}
-
-/*
- * Prepare for 'hlsearch' and match highlighting in one window line.
- * Return TRUE if there is such highlighting and set "search_attr" to the
- * current highlight attribute.
- */
-    int
-prepare_search_hl_line(
-	win_T	    *wp,
-	linenr_T    lnum,
-	colnr_T	    mincol,
-	char_u	    **line,
-	match_T	    *search_hl,
-	int	    *search_attr)
-{
-    matchitem_T *cur;			// points to the match list
-    match_T	*shl;			// points to search_hl or a match
-    int		shl_flag;		// flag to indicate whether search_hl
-					// has been processed or not
-    int		area_highlighting = FALSE;
-
-    /*
-     * Handle highlighting the last used search pattern and matches.
-     * Do this for both search_hl and the match list.
-     * Do not use search_hl in a popup window.
-     */
-    cur = wp->w_match_head;
-    shl_flag = WIN_IS_POPUP(wp);
-    while (cur != NULL || shl_flag == FALSE)
-    {
-	if (shl_flag == FALSE)
-	{
-	    shl = search_hl;
-	    shl_flag = TRUE;
-	}
-	else
-	    shl = &cur->hl;
-	shl->startcol = MAXCOL;
-	shl->endcol = MAXCOL;
-	shl->attr_cur = 0;
-	shl->is_addpos = FALSE;
-	if (cur != NULL)
-	    cur->pos.cur = 0;
-	next_search_hl(wp, search_hl, shl, lnum, mincol,
-						shl == search_hl ? NULL : cur);
-
-	// Need to get the line again, a multi-line regexp may have made it
-	// invalid.
-	*line = ml_get_buf(wp->w_buffer, lnum, FALSE);
-
-	if (shl->lnum != 0 && shl->lnum <= lnum)
-	{
-	    if (shl->lnum == lnum)
-		shl->startcol = shl->rm.startpos[0].col;
-	    else
-		shl->startcol = 0;
-	    if (lnum == shl->lnum + shl->rm.endpos[0].lnum
-						- shl->rm.startpos[0].lnum)
-		shl->endcol = shl->rm.endpos[0].col;
-	    else
-		shl->endcol = MAXCOL;
-	    // Highlight one character for an empty match.
-	    if (shl->startcol == shl->endcol)
-	    {
-		if (has_mbyte && (*line)[shl->endcol] != NUL)
-		    shl->endcol += (*mb_ptr2len)((*line) + shl->endcol);
-		else
-		    ++shl->endcol;
-	    }
-	    if ((long)shl->startcol < mincol)  // match at leftcol
-	    {
-		shl->attr_cur = shl->attr;
-		*search_attr = shl->attr;
-	    }
-	    area_highlighting = TRUE;
-	}
-	if (shl != search_hl && cur != NULL)
-	    cur = cur->next;
-    }
-    return area_highlighting;
-}
-
-/*
- * For a position in a line: Check for start/end of 'hlsearch' and other
- * matches.
- * After end, check for start/end of next match.
- * When another match, have to check for start again.
- * Watch out for matching an empty string!
- * Return the updated search_attr.
- */
-    int
-update_search_hl(
-	win_T	    *wp,
-	linenr_T    lnum,
-	colnr_T	    col,
-	char_u	    **line,
-	match_T	    *search_hl,
-	int	    *has_match_conc UNUSED,
-	int	    *match_conc UNUSED,
-	int	    did_line_attr,
-	int	    lcs_eol_one)
-{
-    matchitem_T *cur;		    // points to the match list
-    match_T	*shl;		    // points to search_hl or a match
-    int		shl_flag;	    // flag to indicate whether search_hl
-				    // has been processed or not
-    int		pos_inprogress;	    // marks that position match search is in
-				    // progress
-    int		search_attr = 0;
-
-
-    // Do this for 'search_hl' and the match list (ordered by priority).
-    cur = wp->w_match_head;
-    shl_flag = WIN_IS_POPUP(wp);
-    while (cur != NULL || shl_flag == FALSE)
-    {
-	if (shl_flag == FALSE
-		&& (cur == NULL
-			|| cur->priority > SEARCH_HL_PRIORITY))
-	{
-	    shl = search_hl;
-	    shl_flag = TRUE;
-	}
-	else
-	    shl = &cur->hl;
-	if (cur != NULL)
-	    cur->pos.cur = 0;
-	pos_inprogress = TRUE;
-	while (shl->rm.regprog != NULL || (cur != NULL && pos_inprogress))
-	{
-	    if (shl->startcol != MAXCOL
-		    && col >= shl->startcol
-		    && col < shl->endcol)
-	    {
-		int next_col = col + mb_ptr2len(*line + col);
-
-		if (shl->endcol < next_col)
-		    shl->endcol = next_col;
-		shl->attr_cur = shl->attr;
-# ifdef FEAT_CONCEAL
-		// Match with the "Conceal" group results in hiding
-		// the match.
-		if (cur != NULL
-			&& shl != search_hl
-			&& syn_name2id((char_u *)"Conceal") == cur->hlg_id)
-		{
-		    *has_match_conc = col == shl->startcol ? 2 : 1;
-		    *match_conc = cur->conceal_char;
-		}
-		else
-		    *has_match_conc = 0;
-# endif
-	    }
-	    else if (col == shl->endcol)
-	    {
-		shl->attr_cur = 0;
-		next_search_hl(wp, search_hl, shl, lnum, col,
-					       shl == search_hl ? NULL : cur);
-		pos_inprogress = !(cur == NULL || cur->pos.cur == 0);
-
-		// Need to get the line again, a multi-line regexp may have
-		// made it invalid.
-		*line = ml_get_buf(wp->w_buffer, lnum, FALSE);
-
-		if (shl->lnum == lnum)
-		{
-		    shl->startcol = shl->rm.startpos[0].col;
-		    if (shl->rm.endpos[0].lnum == 0)
-			shl->endcol = shl->rm.endpos[0].col;
-		    else
-			shl->endcol = MAXCOL;
-
-		    if (shl->startcol == shl->endcol)
-		    {
-			// highlight empty match, try again after
-			// it
-			if (has_mbyte)
-			    shl->endcol += (*mb_ptr2len)(*line + shl->endcol);
-			else
-			    ++shl->endcol;
-		    }
-
-		    // Loop to check if the match starts at the
-		    // current position
-		    continue;
-		}
-	    }
-	    break;
-	}
-	if (shl != search_hl && cur != NULL)
-	    cur = cur->next;
-    }
-
-    // Use attributes from match with highest priority among 'search_hl' and
-    // the match list.
-    cur = wp->w_match_head;
-    shl_flag = WIN_IS_POPUP(wp);
-    while (cur != NULL || shl_flag == FALSE)
-    {
-	if (shl_flag == FALSE
-		&& (cur == NULL ||
-			cur->priority > SEARCH_HL_PRIORITY))
-	{
-	    shl = search_hl;
-	    shl_flag = TRUE;
-	}
-	else
-	    shl = &cur->hl;
-	if (shl->attr_cur != 0)
-	    search_attr = shl->attr_cur;
-	if (shl != search_hl && cur != NULL)
-	    cur = cur->next;
-    }
-    // Only highlight one character after the last column.
-    if (*(*line + col) == NUL && (did_line_attr >= 1
-				       || (wp->w_p_list && lcs_eol_one == -1)))
-	search_attr = 0;
-    return search_attr;
-}
-
-    int
-get_prevcol_hl_flag(win_T *wp, match_T *search_hl, long curcol)
-{
-    long	prevcol = curcol;
-    int		prevcol_hl_flag = FALSE;
-    matchitem_T *cur;			// points to the match list
-
-    // we're not really at that column when skipping some text
-    if ((long)(wp->w_p_wrap ? wp->w_skipcol : wp->w_leftcol) > prevcol)
-	++prevcol;
-
-    if (!search_hl->is_addpos && prevcol == (long)search_hl->startcol)
-	prevcol_hl_flag = TRUE;
-    else
-    {
-	cur = wp->w_match_head;
-	while (cur != NULL)
-	{
-	    if (!cur->hl.is_addpos && prevcol == (long)cur->hl.startcol)
-	    {
-		prevcol_hl_flag = TRUE;
-		break;
-	    }
-	    cur = cur->next;
-	}
-    }
-    return prevcol_hl_flag;
-}
-
-/*
- * Get highlighting for the char after the text in "char_attr" from 'hlsearch'
- * or match highlighting.
- */
-    void
-get_search_match_hl(win_T *wp, match_T *search_hl, long col, int *char_attr)
-{
-    matchitem_T *cur;			// points to the match list
-    match_T	*shl;			// points to search_hl or a match
-    int		shl_flag;		// flag to indicate whether search_hl
-					// has been processed or not
-
-    cur = wp->w_match_head;
-    shl_flag = WIN_IS_POPUP(wp);
-    while (cur != NULL || shl_flag == FALSE)
-    {
-	if (shl_flag == FALSE
-		&& ((cur != NULL
-			&& cur->priority > SEARCH_HL_PRIORITY)
-		    || cur == NULL))
-	{
-	    shl = search_hl;
-	    shl_flag = TRUE;
-	}
-	else
-	    shl = &cur->hl;
-	if (col - 1 == (long)shl->startcol
-		&& (shl == search_hl || !shl->is_addpos))
-	    *char_attr = shl->attr;
-	if (shl != search_hl && cur != NULL)
-	    cur = cur->next;
-    }
-}
-
-#endif // FEAT_SEARCH_EXTRA
-
-#if defined(FEAT_EVAL) || defined(PROTO)
-# ifdef FEAT_SEARCH_EXTRA
-    static int
-matchadd_dict_arg(typval_T *tv, char_u **conceal_char, win_T **win)
-{
-    dictitem_T *di;
-
-    if (tv->v_type != VAR_DICT)
-    {
-	emsg(_(e_dictreq));
-	return FAIL;
-    }
-
-    if (dict_find(tv->vval.v_dict, (char_u *)"conceal",