mirror of
https://github.com/libretro/RetroArch.git
synced 2024-12-30 12:55:46 +00:00
364 lines
8.2 KiB
C
364 lines
8.2 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
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* Copyright (C) 2011-2015 - Daniel De Matteis
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "core_options.h"
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#include <string.h>
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#include <file/config_file.h>
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#include <file/dir_list.h>
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#include <compat/posix_string.h>
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#include <compat/strl.h>
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#include <retro_miscellaneous.h>
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struct core_option
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{
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char *desc;
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char *key;
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struct string_list *vals;
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size_t index;
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};
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struct core_option_manager
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{
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config_file_t *conf;
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char conf_path[PATH_MAX_LENGTH];
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struct core_option *opts;
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size_t size;
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bool updated;
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};
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/**
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* core_option_free:
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* @opt : options manager handle
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*
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* Frees core option manager handle.
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**/
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void core_option_free(core_option_manager_t *opt)
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{
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size_t i;
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if (!opt)
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return;
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for (i = 0; i < opt->size; i++)
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{
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free(opt->opts[i].desc);
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free(opt->opts[i].key);
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string_list_free(opt->opts[i].vals);
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}
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if (opt->conf)
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config_file_free(opt->conf);
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free(opt->opts);
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free(opt);
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}
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void core_option_get(core_option_manager_t *opt, struct retro_variable *var)
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{
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size_t i;
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opt->updated = false;
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for (i = 0; i < opt->size; i++)
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{
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if (!strcmp(opt->opts[i].key, var->key))
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{
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var->value = core_option_get_val(opt, i);
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return;
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}
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}
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var->value = NULL;
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}
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static bool parse_variable(core_option_manager_t *opt, size_t idx,
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const struct retro_variable *var)
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{
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size_t i;
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const char *val_start;
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char *value, *desc_end, *config_val = NULL;
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struct core_option *option = (struct core_option*)&opt->opts[idx];
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if (!option)
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return false;
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option->key = strdup(var->key);
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value = strdup(var->value);
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desc_end = strstr(value, "; ");
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if (!desc_end)
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{
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free(value);
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return false;
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}
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*desc_end = '\0';
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option->desc = strdup(value);
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val_start = desc_end + 2;
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option->vals = string_split(val_start, "|");
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if (!option->vals)
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{
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free(value);
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return false;
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}
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if (config_get_string(opt->conf, option->key, &config_val))
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{
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for (i = 0; i < option->vals->size; i++)
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{
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if (!strcmp(option->vals->elems[i].data, config_val))
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{
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option->index = i;
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break;
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}
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}
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free(config_val);
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}
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free(value);
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return true;
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}
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/**
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* core_option_new:
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* @conf_path : Filesystem path to write core option config file to.
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* @vars : Pointer to variable array handle.
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*
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* Creates and initializes a core manager handle.
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*
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* Returns: handle to new core manager handle, otherwise NULL.
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**/
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core_option_manager_t *core_option_new(const char *conf_path,
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const struct retro_variable *vars)
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{
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const struct retro_variable *var;
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size_t size = 0;
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core_option_manager_t *opt = (core_option_manager_t*)
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calloc(1, sizeof(*opt));
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if (!opt)
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return NULL;
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if (*conf_path)
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opt->conf = config_file_new(conf_path);
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if (!opt->conf)
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opt->conf = config_file_new(NULL);
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strlcpy(opt->conf_path, conf_path, sizeof(opt->conf_path));
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if (!opt->conf)
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goto error;
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for (var = vars; var->key && var->value; var++)
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size++;
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opt->opts = (struct core_option*)calloc(size, sizeof(*opt->opts));
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if (!opt->opts)
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goto error;
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opt->size = size;
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size = 0;
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for (var = vars; var->key && var->value; size++, var++)
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{
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if (!parse_variable(opt, size, var))
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goto error;
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}
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return opt;
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error:
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core_option_free(opt);
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return NULL;
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}
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/**
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* core_option_updated:
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* @opt : options manager handle
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*
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* Has a core option been updated?
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*
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* Returns: true (1) if a core option has been updated,
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* otherwise false (0).
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**/
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bool core_option_updated(core_option_manager_t *opt)
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{
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if (!opt)
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return false;
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return opt->updated;
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}
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/**
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* core_option_flush:
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* @opt : options manager handle
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*
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* Writes core option key-pair values to file.
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*
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* Returns: true (1) if core option values could be
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* successfully saved to disk, otherwise false (0).
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**/
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bool core_option_flush(core_option_manager_t *opt)
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{
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size_t i;
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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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if (option)
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config_set_string(opt->conf, option->key, core_option_get_val(opt, i));
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}
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return config_file_write(opt->conf, opt->conf_path);
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}
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/**
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* core_option_size:
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* @opt : options manager handle
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*
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* Gets total number of options.
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*
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* Returns: Total number of options.
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**/
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size_t core_option_size(core_option_manager_t *opt)
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{
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if (!opt)
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return 0;
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return opt->size;
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}
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/**
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* core_option_get_desc:
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* @opt : options manager handle
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* @index : index identifier of the option
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*
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* Gets description for an option.
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*
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* Returns: Description for an option.
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**/
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const char *core_option_get_desc(core_option_manager_t *opt, size_t idx)
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{
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if (!opt)
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return NULL;
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return opt->opts[idx].desc;
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}
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/**
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* core_option_get_val:
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* @opt : options manager handle
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* @index : index identifier of the option
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*
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* Gets value for an option.
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*
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* Returns: Value for an option.
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**/
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const char *core_option_get_val(core_option_manager_t *opt, size_t idx)
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{
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struct core_option *option = (struct core_option*)&opt->opts[idx];
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if (!option)
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return NULL;
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return option->vals->elems[option->index].data;
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}
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/**
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* core_option_get_vals:
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* @opt : pointer to core option manager object.
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* @idx : idx of core option.
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*
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* Gets list of core option values from core option at index @idx.
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*
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* Returns: string list of core option values if successful, otherwise
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* NULL.
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**/
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struct string_list *core_option_get_vals(
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core_option_manager_t *opt, size_t idx)
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{
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if (!opt)
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return NULL;
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return opt->opts[idx].vals;
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}
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void core_option_set_val(core_option_manager_t *opt,
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size_t idx, size_t val_idx)
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{
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struct core_option *option= (struct core_option*)&opt->opts[idx];
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if (!option)
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return;
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option->index = val_idx % option->vals->size;
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opt->updated = true;
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}
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/**
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* core_option_next:
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* @opt : pointer to core option manager object.
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* @idx : index of core option to be reset to defaults.
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*
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* Get next value for core option specified by @idx.
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* Options wrap around.
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**/
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void core_option_next(core_option_manager_t *opt, size_t idx)
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{
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struct core_option *option = (struct core_option*)&opt->opts[idx];
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if (!option)
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return;
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option->index = (option->index + 1) % option->vals->size;
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opt->updated = true;
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}
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/**
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* core_option_prev:
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* @opt : pointer to core option manager object.
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* @idx : index of core option to be reset to defaults.
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* Options wrap around.
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*
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* Get previous value for core option specified by @idx.
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* Options wrap around.
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**/
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void core_option_prev(core_option_manager_t *opt, size_t idx)
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{
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struct core_option *option = (struct core_option*)&opt->opts[idx];
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if (!option)
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return;
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option->index = (option->index + option->vals->size - 1) %
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option->vals->size;
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opt->updated = true;
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}
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/**
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* core_option_set_default:
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* @opt : pointer to core option manager object.
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* @idx : index of core option to be reset to defaults.
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*
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* Reset core option specified by @idx and sets default value for option.
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**/
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void core_option_set_default(core_option_manager_t *opt, size_t idx)
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{
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if (!opt)
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return;
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opt->opts[idx].index = 0;
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opt->updated = true;
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}
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