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RetroArch/core_options.c

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2011-2015 - 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 <string.h>
#include <file/config_file.h>
#include <file/dir_list.h>
#include <compat/posix_string.h>
#include <compat/strl.h>
#include <retro_miscellaneous.h>
#include "core_options.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_LENGTH];
struct core_option *opts;
size_t size;
bool updated;
};
/**
* core_option_free:
* @opt : options manager handle
*
* Frees core option manager handle.
**/
void core_option_free(core_option_manager_t *opt)
{
size_t i;
if (!opt)
return;
for (i = 0; i < opt->size; i++)
{
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;
if (!opt)
return;
opt->updated = false;
for (i = 0; i < opt->size; i++)
{
if (!strcmp(opt->opts[i].key, var->key))
{
var->value = core_option_get_val(opt, i);
return;
}
}
var->value = NULL;
}
static bool parse_variable(core_option_manager_t *opt, size_t idx,
const struct retro_variable *var)
{
const char *val_start = NULL;
char *value = NULL;
char *desc_end = NULL;
char *config_val = NULL;
struct core_option *option = (struct core_option*)&opt->opts[idx];
if (!option)
return false;
option->key = strdup(var->key);
value = strdup(var->value);
desc_end = strstr(value, "; ");
if (!desc_end)
{
free(value);
return false;
}
*desc_end = '\0';
option->desc = strdup(value);
val_start = desc_end + 2;
option->vals = string_split(val_start, "|");
if (!option->vals)
{
free(value);
return false;
}
if (config_get_string(opt->conf, option->key, &config_val))
{
size_t i;
for (i = 0; i < option->vals->size; i++)
{
if (!strcmp(option->vals->elems[i].data, config_val))
{
option->index = i;
break;
}
}
free(config_val);
}
free(value);
return true;
}
/**
* core_option_new:
* @conf_path : Filesystem path to write core option config file to.
* @vars : Pointer to variable array handle.
*
* Creates and initializes a core manager handle.
*
* Returns: handle to new core manager handle, otherwise NULL.
**/
core_option_manager_t *core_option_new(const char *conf_path,
const struct retro_variable *vars)
{
const struct retro_variable *var;
size_t size = 0;
core_option_manager_t *opt = (core_option_manager_t*)
calloc(1, sizeof(*opt));
if (!opt)
return NULL;
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++)
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++)
{
if (!parse_variable(opt, size, var))
goto error;
}
return opt;
error:
core_option_free(opt);
return NULL;
}
/**
* core_option_updated:
* @opt : options manager handle
*
* Has a core option been updated?
*
* Returns: true (1) if a core option has been updated,
* otherwise false (0).
**/
bool core_option_updated(core_option_manager_t *opt)
{
if (!opt)
return false;
return opt->updated;
}
/**
* core_option_flush:
* @opt : options manager handle
*
* Writes core option key-pair values to file.
*
* Returns: true (1) if core option values could be
* successfully saved to disk, otherwise false (0).
**/
bool core_option_flush(core_option_manager_t *opt)
{
size_t i;
for (i = 0; i < opt->size; i++)
{
struct core_option *option = (struct core_option*)&opt->opts[i];
if (option)
config_set_string(opt->conf, option->key, core_option_get_val(opt, i));
}
return config_file_write(opt->conf, opt->conf_path);
}
/**
* core_option_size:
* @opt : options manager handle
*
* Gets total number of options.
*
* Returns: Total number of options.
**/
size_t core_option_size(core_option_manager_t *opt)
{
if (!opt)
return 0;
return opt->size;
}
/**
* core_option_get_desc:
* @opt : options manager handle
* @index : index identifier of the option
*
* Gets description for an option.
*
* Returns: Description for an option.
**/
const char *core_option_get_desc(core_option_manager_t *opt, size_t idx)
{
if (!opt)
return NULL;
return opt->opts[idx].desc;
}
/**
* core_option_get_val:
* @opt : options manager handle
* @index : index identifier of the option
*
* Gets value for an option.
*
* Returns: Value for an option.
**/
const char *core_option_get_val(core_option_manager_t *opt, size_t idx)
{
struct core_option *option = NULL;
if (!opt)
return NULL;
option = (struct core_option*)&opt->opts[idx];
if (!option)
return NULL;
return option->vals->elems[option->index].data;
}
/**
* core_option_get_vals:
* @opt : pointer to core option manager object.
* @idx : idx of core option.
*
* Gets list of core option values from core option at index @idx.
*
* Returns: string list of core option values if successful, otherwise
* NULL.
**/
struct string_list *core_option_get_vals(
core_option_manager_t *opt, size_t idx)
{
if (!opt)
return NULL;
return opt->opts[idx].vals;
}
void core_option_set_val(core_option_manager_t *opt,
size_t idx, size_t val_idx)
{
struct core_option *option= NULL;
if (!opt)
return;
option = (struct core_option*)&opt->opts[idx];
if (!option)
return;
option->index = val_idx % option->vals->size;
opt->updated = true;
}
/**
* core_option_next:
* @opt : pointer to core option manager object.
* @idx : index of core option to be reset to defaults.
*
* Get next value for core option specified by @idx.
* Options wrap around.
**/
void core_option_next(core_option_manager_t *opt, size_t idx)
{
struct core_option *option = NULL;
if (!opt)
return;
option = (struct core_option*)&opt->opts[idx];
if (!option)
return;
option->index = (option->index + 1) % option->vals->size;
opt->updated = true;
}
/**
* core_option_prev:
* @opt : pointer to core option manager object.
* @idx : index of core option to be reset to defaults.
* Options wrap around.
*
* Get previous value for core option specified by @idx.
* Options wrap around.
**/
void core_option_prev(core_option_manager_t *opt, size_t idx)
{
struct core_option *option = NULL;
if (!opt)
return;
option = (struct core_option*)&opt->opts[idx];
if (!option)
return;
option->index = (option->index + option->vals->size - 1) %
option->vals->size;
opt->updated = true;
}
/**
* core_option_set_default:
* @opt : pointer to core option manager object.
* @idx : index of core option to be reset to defaults.
*
* Reset core option specified by @idx and sets default value for option.
**/
void core_option_set_default(core_option_manager_t *opt, size_t idx)
{
if (!opt)
return;
opt->opts[idx].index = 0;
opt->updated = true;
}
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