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frontend_salamander.c
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frontend_salamander.c
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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* 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 <stdint.h>
#include <boolean.h>
#include <stddef.h>
#include <string.h>
#include <file/config_file.h>
#include <file/file_path.h>
#include <lists/dir_list.h>
#include <retro_miscellaneous.h>
#include <string/stdstring.h>
#include <compat/strl.h>
#ifdef HAVE_CONFIG_H
#include "../config.h"
#endif
#include "frontend_driver.h"
#include "../defaults.h"
#include "../verbosity.h"
struct defaults g_defaults;
/*We need to set libretro to the first entry in the cores
* directory so that it will be saved to the config file
*/
static void find_first_libretro_core(char *first_file,
size_t size_of_first_file, const char *dir,
const char * ext)
{
size_t i;
bool ret = false;
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;
}
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};
char salamander_name[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 (!frontend_driver_get_salamander_basename(
salamander_name, sizeof(salamander_name)))
break;
if (!strncmp(fname, salamander_name, sizeof(fname)))
{
if (list->size == (i + 1))
{
RARCH_WARN("Entry is RetroArch Salamander itself, "
"but is last entry. No choice but to set it.\n");
strlcpy(first_file, fname, size_of_first_file);
}
continue;
}
strlcpy(first_file, fname, size_of_first_file);
RARCH_LOG("First found libretro core is: \"%s\".\n", first_file);
ret = true;
}
dir_list_free(list);
}
/* Last fallback - we'll need to start the first executable file
* we can find in the RetroArch cores directory.
*/
static void find_and_set_first_file(char *s, size_t len,
const char *ext)
{
char first_file[PATH_MAX_LENGTH] = {0};
find_first_libretro_core(first_file, sizeof(first_file),
g_defaults.dirs[DEFAULT_DIR_CORE], ext);
if (string_is_empty(first_file))
{
RARCH_ERR("Failed last fallback - RetroArch Salamander will exit.\n");
return;
}
fill_pathname_join(s, g_defaults.dirs[DEFAULT_DIR_CORE], first_file, len);
RARCH_LOG("libretro_path now set to: %s.\n", s);
}
static void salamander_init(char *s, size_t len)
{
/* normal executable loading path */
bool config_exists = config_file_exists(g_defaults.path.config);
if (config_exists)
{
char tmp_str[PATH_MAX_LENGTH] = {0};
config_file_t * conf = (config_file_t*)
config_file_new(g_defaults.path.config);
if (conf)
{
config_get_array(conf, "libretro_path", tmp_str, sizeof(tmp_str));
config_file_free(conf);
if (memcmp(tmp_str, "builtin", 7) != 0)
strlcpy(s, tmp_str, len);
}
#ifdef GEKKO
/* stupid libfat bug or something; sometimes it says
* the file is there when it doesn't. */
else
{
config_exists = false;
}
#endif
}
if (!config_exists || string_is_equal(s, ""))
{
char executable_name[PATH_MAX_LENGTH] = {0};
frontend_driver_get_core_extension(
executable_name, sizeof(executable_name));
find_and_set_first_file(s, len, executable_name);
}
else
RARCH_LOG("Start [%s] found in retroarch.cfg.\n", s);
if (!config_exists)
{
config_file_t *conf = (config_file_t*)config_file_new(NULL);
if (conf)
{
config_set_string(conf, "libretro_path", s);
config_file_write(conf, g_defaults.path.config);
config_file_free(conf);
}
}
}
#ifdef HAVE_MAIN
int salamander_main(int argc, char *argv[])
#else
int main(int argc, char *argv[])
#endif
{
char libretro_path[PATH_MAX_LENGTH] = {0};
void *args = NULL;
struct rarch_main_wrap *wrap_args = NULL;
frontend_ctx_driver_t *frontend_ctx = (frontend_ctx_driver_t*)frontend_ctx_init_first();
if (!frontend_ctx)
return 0;
if (frontend_ctx && frontend_ctx->init)
frontend_ctx->init(args);
if (frontend_ctx && frontend_ctx->environment_get)
frontend_ctx->environment_get(&argc, argv, args, wrap_args);
salamander_init(libretro_path, sizeof(libretro_path));
if (frontend_ctx && frontend_ctx->deinit)
frontend_ctx->deinit(args);
if (frontend_ctx && frontend_ctx->exitspawn)
frontend_ctx->exitspawn(libretro_path, sizeof(libretro_path));
return 1;
}