vendor/less/v449

1 files changed, 69 insertions, 24 deletions

diff --git a/search.c b/search.c
index 143779ee06fcb..f09c068a55919 100644
--- a/search.c
+++ b/search.c
@@ -1,12 +1,11 @@
-/*
- * Copyright (C) 1984-2011  Mark Nudelman
- *
- * You may distribute under the terms of either the GNU General Public
- * License or the Less License, as specified in the README file.
- *
- * For more information about less, or for information on how to 
- * contact the author, see the README file.
- */
+/*

+ * Copyright (C) 1984-2012  Mark Nudelman

+ *

+ * You may distribute under the terms of either the GNU General Public

+ * License or the Less License, as specified in the README file.

+ *

+ * For more information, see the README file.

+ */

 
 
 /*
@@ -66,6 +65,12 @@ struct pattern_info {
 	char* text;
 	int search_type;
 };
+
+#if NO_REGEX
+#define info_compiled(info) ((void*)0)
+#else
+#define info_compiled(info) ((info)->compiled)
+#endif
 	
 static struct pattern_info search_info;
 static struct pattern_info filter_info;
@@ -98,10 +103,12 @@ set_pattern(info, pattern, search_type)
 	char *pattern;
 	int search_type;
 {
+#if !NO_REGEX
 	if (pattern == NULL)
-		CLEAR_PATTERN(search_info.compiled);
+		CLEAR_PATTERN(info->compiled);
 	else if (compile_pattern(pattern, search_type, &info->compiled) < 0)
 		return -1;
+#endif
 	/* Pattern compiled successfully; save the text too. */
 	if (info->text != NULL)
 		free(info->text);
@@ -135,7 +142,9 @@ clear_pattern(info)
 	if (info->text != NULL)
 		free(info->text);
 	info->text = NULL;
+#if !NO_REGEX
 	uncompile_pattern(&info->compiled);
+#endif
 }
 
 /*
@@ -191,9 +200,11 @@ get_cvt_ops()
 prev_pattern(info)
 	struct pattern_info *info;
 {
-	if (info->search_type & SRCH_NO_REGEX)
-		return (info->text != NULL);
-	return (!is_null_pattern(info->compiled));
+#if !NO_REGEX
+	if ((info->search_type & SRCH_NO_REGEX) == 0)
+		return (!is_null_pattern(info->compiled));
+#endif
+	return (info->text != NULL);
 }
 
 #if HILITE_SEARCH
@@ -476,6 +487,47 @@ add_hilite(anchor, hl)
 }
 
 /*
+ * Hilight every character in a range of displayed characters.
+ */
+	static void
+create_hilites(linepos, start_index, end_index, chpos)
+	POSITION linepos;
+	int start_index;
+	int end_index;
+	int *chpos;
+{
+	struct hilite *hl;
+	int i;
+
+	/* Start the first hilite. */
+	hl = (struct hilite *) ecalloc(1, sizeof(struct hilite));
+	hl->hl_startpos = linepos + chpos[start_index];
+
+	/*
+	 * Step through the displayed chars.
+	 * If the source position (before cvt) of the char is one more
+	 * than the source pos of the previous char (the usual case),
+	 * just increase the size of the current hilite by one.
+	 * Otherwise (there are backspaces or something involved),
+	 * finish the current hilite and start a new one.
+	 */
+	for (i = start_index+1;  i <= end_index;  i++)
+	{
+		if (chpos[i] != chpos[i-1] + 1 || i == end_index)
+		{
+			hl->hl_endpos = linepos + chpos[i-1] + 1;
+			add_hilite(&hilite_anchor, hl);
+			/* Start new hilite unless this is the last char. */
+			if (i < end_index)
+			{
+				hl = (struct hilite *) ecalloc(1, sizeof(struct hilite));
+				hl->hl_startpos = linepos + chpos[i];
+			}
+		}
+	}
+}
+
+/*
  * Make a hilite for each string in a physical line which matches 
  * the current pattern.
  * sp,ep delimit the first match already found.
@@ -492,7 +544,6 @@ hilite_line(linepos, line, line_len, chpos, sp, ep, cvt_ops)
 {
 	char *searchp;
 	char *line_end = line + line_len;
-	struct hilite *hl;
 
 	if (sp == NULL || ep == NULL)
 		return;
@@ -508,13 +559,7 @@ hilite_line(linepos, line, line_len, chpos, sp, ep, cvt_ops)
 	 */
 	searchp = line;
 	do {
-		if (ep > sp)
-		{
-			hl = (struct hilite *) ecalloc(1, sizeof(struct hilite));
-			hl->hl_startpos = linepos + chpos[sp-line];
-			hl->hl_endpos = linepos + chpos[ep-line];
-			add_hilite(&hilite_anchor, hl);
-		}
+		create_hilites(linepos, sp-line, ep-line, chpos);
 		/*
 		 * If we matched more than zero characters,
 		 * move to the first char after the string we matched.
@@ -526,7 +571,7 @@ hilite_line(linepos, line, line_len, chpos, sp, ep, cvt_ops)
 			searchp++;
 		else /* end of line */
 			break;
-	} while (match_pattern(search_info.compiled, search_info.text,
+	} while (match_pattern(info_compiled(&search_info), search_info.text,
 			searchp, line_end - searchp, &sp, &ep, 1, search_info.search_type));
 }
 #endif
@@ -798,7 +843,7 @@ search_range(pos, endpos, search_type, matches, maxlines, plinepos, pendpos)
 		 * If so, add an entry to the filter list.
 		 */
 		if ((search_type & SRCH_FIND_ALL) && prev_pattern(&filter_info)) {
-			int line_filter = match_pattern(filter_info.compiled, filter_info.text,
+			int line_filter = match_pattern(info_compiled(&filter_info), filter_info.text,
 				cline, line_len, &sp, &ep, 0, filter_info.search_type);
 			if (line_filter)
 			{
@@ -818,7 +863,7 @@ search_range(pos, endpos, search_type, matches, maxlines, plinepos, pendpos)
 		 */
 		if (prev_pattern(&search_info))
 		{
-			line_match = match_pattern(search_info.compiled, search_info.text,
+			line_match = match_pattern(info_compiled(&search_info), search_info.text,
 				cline, line_len, &sp, &ep, 0, search_type);
 			if (line_match)
 			{