Use strcasestr.

Since it's a GNU extension, move to strcasestr.h.

compat/compat.c

@@ -202,6 +202,39 @@ int getopt_long(int argc, char *argv[],
 
 #endif
 
+#ifndef HAVE_STRCASESTR
+// Pretty much strncasecmp.
+static int casencmp(const char *a, const char *b, size_t n)
+{
+   size_t i;
+   for (i = 0; i < n; i++)
+   {
+      int a_lower = tolower(a[i]);
+      int b_lower = tolower(b[i]);
+      if (a_lower != b_lower)
+         return a_lower - b_lower;
+   }
+
+   return 0;
+}
+
+char *strcasestr_rarch__(const char *haystack, const char *needle)
+{
+   size_t i;
+   size_t hay_len = strlen(haystack);
+   size_t needle_len = strlen(needle);
+   if (needle_len > hay_len)
+      return NULL;
+
+   size_t search_off = hay_len - needle_len;
+   for (i = 0; i <= search_off; i++)
+      if (!casencmp(haystack + i, needle, needle_len))
+         return (char*)haystack + i;
+
+   return NULL;
+}
+#endif
+
 #ifndef HAVE_STRL
 
 // Implementation of strlcpy()/strlcat() based on OpenBSD.

compat/strcasestr.h

@@ -0,0 +1,41 @@
+/*  RetroArch - A frontend for libretro.
+ *  Copyright (C) 2010-2013 - Hans-Kristian Arntzen
+ * 
+ *  RetroArch is free software: you can redistribute it and/or modify it under the terms
+ *  of the GNU General Public License as published by the Free Software Found-
+ *  ation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ *  PURPOSE.  See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with RetroArch.
+ *  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef RARCH_STRCASESTR_H
+#define RARCH_STRCASESTR_H
+
+#include <string.h>
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifndef HAVE_STRCASESTR
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+// Avoid possible naming collisions during link since we prefer to use the actual name.
+#define strcasestr(haystack, needle) strcasestr_rarch__(haystack, needle)
+
+char *strcasestr(const char *haystack, const char *needle);
+#ifdef __cplusplus
+}
+#endif
+#endif
+
+
+#endif
+

file_list.c

@@ -17,6 +17,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include "file_list.h"
+#include "compat/strcasestr.h"
 
 struct item_file
 {
@@ -128,7 +129,7 @@ bool file_list_search(const file_list_t *list, const char *needle, size_t *index
       file_list_get_alt_at_offset(list, i, &alt);
       if (!alt)
          continue;
-      if (strstr(alt, needle))
+      if (strcasestr(alt, needle)) // GNU, but compat version in posix_string.h.
       {
          *index = i;
          return true;