+
+/* Performs a case-insensitive strstr for ASCII strings */
+static const gchar *
+ascii_stristr(const gchar *haystack, const gchar *needle)
+{
+ int needle_len;
+ int haystack_len;
+ const gchar *pos;
+ const gchar *max_pos;
+
+ if (haystack == NULL || needle == NULL) {
+ return haystack; /* as in strstr */
+ }
+
+ needle_len = strlen(needle);
+
+ if (needle_len == 0) {
+ return haystack; /* as in strstr */
+ }
+
+ haystack_len = strlen(haystack);
+ max_pos = haystack + haystack_len - needle_len;
+
+ for (pos = haystack; pos <= max_pos; pos++) {
+ if (g_ascii_strncasecmp (pos, needle, needle_len) == 0) {
+ return pos;
+ }
+ }
+
+ return NULL;
+}
+
+