RetroArch/core_options.c

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/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
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*
* 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 "core_options.h"
#include "general.h"
#include "file.h"
#include "compat/posix_string.h"
struct core_option
{
char *desc;
char *key;
struct string_list *vals;
size_t index;
};
struct core_option_manager
{
config_file_t *conf;
char conf_path[PATH_MAX];
struct core_option *opts;
size_t size;
bool updated;
};
void core_option_free(core_option_manager_t *opt)
{
size_t i;
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if (!opt)
return;
for (i = 0; i < opt->size; i++)
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{
free(opt->opts[i].desc);
free(opt->opts[i].key);
string_list_free(opt->opts[i].vals);
}
if (opt->conf)
config_file_free(opt->conf);
free(opt->opts);
free(opt);
}
void core_option_get(core_option_manager_t *opt, struct retro_variable *var)
{
size_t i;
opt->updated = false;
for (i = 0; i < opt->size; i++)
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{
if (strcmp(opt->opts[i].key, var->key) == 0)
{
var->value = core_option_get_val(opt, i);
return;
}
}
var->value = NULL;
}
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static bool parse_variable(core_option_manager_t *opt, size_t index,
const struct retro_variable *var)
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{
size_t i;
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struct core_option *option = (struct core_option*)&opt->opts[index];
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option->key = strdup(var->key);
char *value = strdup(var->value);
char *desc_end = strstr(value, "; ");
if (!desc_end)
{
free(value);
return false;
}
*desc_end = '\0';
option->desc = strdup(value);
const char *val_start = desc_end + 2;
option->vals = string_split(val_start, "|");
if (!option->vals)
{
free(value);
return false;
}
char *config_val = NULL;
if (config_get_string(opt->conf, option->key, &config_val))
{
for (i = 0; i < option->vals->size; i++)
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{
if (strcmp(option->vals->elems[i].data, config_val) == 0)
{
option->index = i;
break;
}
}
free(config_val);
}
free(value);
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RARCH_LOG("Core option:\n");
RARCH_LOG("\tDescription: %s\n", option->desc);
RARCH_LOG("\tKey: %s\n", option->key);
RARCH_LOG("\tCurrent value: %s\n", core_option_get_val(opt, index));
RARCH_LOG("\tPossible values:\n");
for (i = 0; i < option->vals->size; i++)
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RARCH_LOG("\t\t%s\n", option->vals->elems[i].data);
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return true;
}
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core_option_manager_t *core_option_new(const char *conf_path,
const struct retro_variable *vars)
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{
const struct retro_variable *var;
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core_option_manager_t *opt = (core_option_manager_t*)
calloc(1, sizeof(*opt));
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if (!opt)
return NULL;
size_t size = 0;
if (*conf_path)
opt->conf = config_file_new(conf_path);
if (!opt->conf)
opt->conf = config_file_new(NULL);
strlcpy(opt->conf_path, conf_path, sizeof(opt->conf_path));
if (!opt->conf)
goto error;
for (var = vars; var->key && var->value; var++)
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size++;
opt->opts = (struct core_option*)calloc(size, sizeof(*opt->opts));
if (!opt->opts)
goto error;
opt->size = size;
size = 0;
for (var = vars; var->key && var->value; size++, var++)
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{
if (!parse_variable(opt, size, var))
goto error;
}
return opt;
error:
core_option_free(opt);
return NULL;
}
bool core_option_updated(core_option_manager_t *opt)
{
return opt->updated;
}
void core_option_flush(core_option_manager_t *opt)
{
size_t i;
for (i = 0; i < opt->size; i++)
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{
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struct core_option *option = (struct core_option*)&opt->opts[i];
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config_set_string(opt->conf, option->key, core_option_get_val(opt, i));
}
config_file_write(opt->conf, opt->conf_path);
}
size_t core_option_size(core_option_manager_t *opt)
{
return opt->size;
}
const char *core_option_get_desc(core_option_manager_t *opt, size_t index)
{
return opt->opts[index].desc;
}
const char *core_option_get_val(core_option_manager_t *opt, size_t index)
{
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struct core_option *option = (struct core_option*)&opt->opts[index];
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return option->vals->elems[option->index].data;
}
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struct string_list *core_option_get_vals(
core_option_manager_t *opt, size_t index)
{
return opt->opts[index].vals;
}
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void core_option_set_val(core_option_manager_t *opt,
size_t index, size_t val_index)
{
struct core_option *option= (struct core_option*)&opt->opts[index];
option->index = val_index % option->vals->size;
opt->updated = true;
}
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void core_option_next(core_option_manager_t *opt, size_t index)
{
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struct core_option *option = (struct core_option*)&opt->opts[index];
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option->index = (option->index + 1) % option->vals->size;
opt->updated = true;
}
void core_option_prev(core_option_manager_t *opt, size_t index)
{
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struct core_option *option = (struct core_option*)&opt->opts[index];
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option->index = (option->index + option->vals->size - 1) %
option->vals->size;
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opt->updated = true;
}
void core_option_set_default(core_option_manager_t *opt, size_t index)
{
opt->opts[index].index = 0;
opt->updated = true;
}