Update core_manager.c

managers/core_manager.c

@@ -0,0 +1,73 @@
+/*  RetroArch - A frontend for libretro.
+ *  Copyright (C) 2011-2017 - Daniel De Matteis
+ *
+ *  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/>.
+ */
+
+#include <stddef.h>
+#include <string.h>
+
+#include <compat/strl.h>
+
+#include <file/file_path.h>
+#include <lists/string_list.h>
+#include <lists/dir_list.h>
+
+#include "../configuration.h"
+#include "../verbosity.h"
+
+/*We need to set libretro to the first entry in the cores
+ * directory so that it will be saved to the config file
+ */
+bool find_libretro_core(char *fullpath,
+   size_t sizeof_fullpath, char *needle, const char * ext)
+{
+   size_t i;
+   bool                 ret = false;
+   settings_t *settings     = config_get_ptr();
+   const char          *dir = settings->directory.libretro;
+   struct string_list *list = dir_list_new(dir, ext, false, true, false, false);
+
+   if (!list)
+   {
+      RARCH_ERR("Couldn't read directory."
+            " Cannot infer default libretro core.\n");
+      return false;
+   }
+
+   RARCH_LOG("Searching for valid libretro implementation in: \"%s\".\n",
+         dir);
+   
+   for (i = 0; i < list->size && !ret; i++)
+   {
+      char fname[PATH_MAX_LENGTH]           = {0};
+      const char *libretro_elem             = (const char*)list->elems[i].data;
+
+      RARCH_LOG("Checking library: \"%s\".\n", libretro_elem);
+
+      if (!libretro_elem)
+         continue;
+
+      fill_pathname_base(fname, libretro_elem, sizeof(fname));
+
+      if (!strstr(fname, needle))
+         continue;
+
+      strlcpy(fullpath, libretro_elem, sizeof_fullpath);
+      ret = true;
+      break;
+   }
+
+   dir_list_free(list);
+
+   return true;
+}