===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/less/search.c,v
retrieving revision 1.7
retrieving revision 1.8
diff -u -r1.7 -r1.8
--- src/usr.bin/less/search.c	2011/09/21 19:01:49	1.7
+++ src/usr.bin/less/search.c	2014/04/25 13:38:21	1.8
@@ -1,11 +1,10 @@
 /*
- * Copyright (C) 1984-2011  Mark Nudelman
+ * 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 about less, or for information on how to 
- * contact the author, see the README file.
+ * For more information, see the README file.
  */
 
 
@@ -66,6 +65,12 @@
 	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 @@
 	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);
@@ -132,7 +139,9 @@
 	if (info->text != NULL)
 		free(info->text);
 	info->text = NULL;
+#if !NO_REGEX
 	uncompile_pattern(&info->compiled);
+#endif
 }
 
 /*
@@ -188,9 +197,11 @@
 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
@@ -473,6 +484,47 @@
 }
 
 /*
+ * 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.
@@ -489,7 +541,6 @@
 {
 	char *searchp;
 	char *line_end = line + line_len;
-	struct hilite *hl;
 
 	if (sp == NULL || ep == NULL)
 		return;
@@ -505,13 +556,7 @@
 	 */
 	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.
@@ -523,7 +568,7 @@
 			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
@@ -795,7 +840,7 @@
 		 * 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)
 			{
@@ -815,7 +860,7 @@
 		 */
 		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)
 			{