filter_packets: don't refilter all the packets,

if the new filter string is identical to the old one (as it's useless then)

svn path=/trunk/; revision=9858

1 files changed, 10 insertions, 1 deletions

diff --git a/file.c b/file.c
index 90cf33a8a4..10b0ce25b5 100644
--- a/file.c
+++ b/file.c
@@ -1,7 +1,7 @@
 /* file.c
  * File I/O routines
  *
- * $Id: file.c,v 1.350 2004/01/25 22:27:12 guy Exp $
+ * $Id: file.c,v 1.351 2004/01/26 06:43:00 ulfl Exp $
  *
  * Ethereal - Network traffic analyzer
  * By Gerald Combs <gerald@ethereal.com>
@@ -940,6 +940,14 @@ int
 filter_packets(capture_file *cf, gchar *dftext)
 {
   dfilter_t *dfcode;
+  char      *filter_new = dftext ? dftext : "";
+  char      *filter_old = cf->dfilter ? cf->dfilter : "";
+
+
+  /* if new filter equals old one, do nothing */
+  if (strcmp(filter_new, filter_old) == 0) {
+    return 1;
+  }
 
   if (dftext == NULL) {
     /* The new filter is an empty filter (i.e., display all packets). */
@@ -953,6 +961,7 @@ filter_packets(capture_file *cf, gchar *dftext)
     if (!dfilter_compile(dftext, &dfcode)) {
       /* The attempt failed; report an error. */
       simple_dialog(ESD_TYPE_CRIT, NULL, dfilter_error_msg);
+      g_free(dftext);
       return 0;
     }