[geany/geany] d6d836: Don't match regexes on empty strings

[Enrico Tröger]

Branch:      refs/heads/master
Author:      Enrico Tröger <enrico.troeger at uvena.de>
Committer:   Enrico Tröger <enrico.troeger at uvena.de>
Date:        Thu, 11 Sep 2014 17:16:24 UTC
Commit:      d6d836c59fc522fcbb96fab7917311c2c6613ea7
             https://github.com/geany/geany/commit/d6d836c59fc522fcbb96fab7917311c2c6613ea7

Log Message:
-----------
Don't match regexes on empty strings

Save As on an empty document would cause warnings like:
sys:1: Warning: g_regex_match_full: assertion 'string != NULL' failed
because SCI_GETRANGEPOINTER returns NULL then.
On a Ubuntu 12.04 system this warning even crashed Geany at writing the
log message.
So, simply don't search for anything if the document is empty.


Modified Paths:
--------------
    src/search.c

Modified: src/search.c
7 lines changed, 6 insertions(+), 1 deletions(-)
===================================================================
@@ -1968,10 +1968,15 @@ static gint find_regex(ScintillaObject *sci, guint pos, GRegex *regex, GeanyMatc
 {
 	const gchar *text;
 	GMatchInfo *minfo;
+	guint document_length;
 	gint ret = -1;
 	gint offset = 0;
 
-	g_return_val_if_fail(pos <= (guint)sci_get_length(sci), -1);
+	document_length = (guint)sci_get_length(sci);
+	if (document_length <= 0)
+		return -1; /* skip empty documents */
+
+	g_return_val_if_fail(pos <= document_length, -1);
 
 	if (g_regex_get_compile_flags(regex) & G_REGEX_MULTILINE)
 	{



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