mirror of
https://github.com/libretro/RetroArch.git
synced 2024-10-07 06:13:22 +00:00
409 lines
8.8 KiB
C
409 lines
8.8 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
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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 "cheats.h"
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#include "general.h"
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#include <compat/strl.h>
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#include <compat/posix_string.h>
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdlib.h>
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#include <stddef.h>
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#include <string.h>
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#ifdef HAVE_LIBXML2
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#include <libxml/parser.h>
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#include <libxml/tree.h>
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#else
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#define RXML_LIBXML2_COMPAT
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#include "compat/rxml/rxml.h"
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#endif
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struct cheat
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{
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char *desc;
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bool state;
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char *code;
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};
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struct cheat_manager
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{
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struct cheat *cheats;
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unsigned ptr;
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unsigned size;
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unsigned buf_size;
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};
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static char *strcat_alloc(char *dest, const char *input)
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{
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size_t dest_len = dest ? strlen(dest) : 0;
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size_t input_len = strlen(input);
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size_t required_len = dest_len + input_len + 1;
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char *output = (char*)realloc(dest, required_len);
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if (!output)
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return NULL;
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if (dest)
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strlcat(output, input, required_len);
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else
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strlcpy(output, input, required_len);
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return output;
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}
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static bool xml_grab_cheat(struct cheat *cht, xmlNodePtr ptr)
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{
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bool first;
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if (!ptr)
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return false;
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memset(cht, 0, sizeof(struct cheat));
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first = true;
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for (; ptr; ptr = ptr->next)
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{
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if (strcmp((const char*)ptr->name, "description") == 0)
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cht->desc = (char*)xmlNodeGetContent(ptr);
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else if (strcmp((const char*)ptr->name, "code") == 0)
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{
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xmlChar *code;
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if (!first)
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{
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cht->code = strcat_alloc(cht->code, "+");
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if (!cht->code)
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return false;
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}
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code = (xmlChar*)xmlNodeGetContent(ptr);
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if (!code)
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return false;
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cht->code = strcat_alloc(cht->code, (const char*)code);
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xmlFree(code);
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if (!cht->code)
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return false;
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first = false;
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}
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}
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return true;
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}
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static bool xml_grab_cheats(cheat_manager_t *handle, xmlNodePtr ptr)
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{
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for (; ptr; ptr = ptr->next)
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{
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if (strcmp((const char*)ptr->name, "name") == 0)
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{
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xmlChar *name = (xmlChar*)xmlNodeGetContent(ptr);
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if (name)
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{
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RARCH_LOG("Found cheat for game: \"%s\"\n", name);
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xmlFree(name);
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}
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}
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else if (strcmp((const char*)ptr->name, "cheat") == 0)
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{
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if (handle->size == handle->buf_size)
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{
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handle->buf_size *= 2;
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handle->cheats = (struct cheat*)
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realloc(handle->cheats, handle->buf_size * sizeof(struct cheat));
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if (!handle->cheats)
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return false;
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}
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if (xml_grab_cheat(&handle->cheats[handle->size], ptr->children))
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handle->size++;
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}
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}
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return true;
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}
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static void cheat_manager_apply_cheats(cheat_manager_t *handle)
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{
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unsigned i;
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unsigned idx = 0;
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pretro_cheat_reset();
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for (i = 0; i < handle->size; i++)
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{
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if (handle->cheats[i].state)
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pretro_cheat_set(idx++, true, handle->cheats[i].code);
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}
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}
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static void cheat_manager_load_config(cheat_manager_t *handle,
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const char *path, const char *sha256)
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{
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const char *num;
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char *str, *save;
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config_file_t *conf;
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if (!(*path))
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return;
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conf = (config_file_t*)config_file_new(path);
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if (!conf)
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return;
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str = NULL;
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if (!config_get_string(conf, sha256, &str))
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{
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config_file_free(conf);
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return;
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}
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save = NULL;
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num = (const char*)strtok_r(str, ";", &save);
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while (num)
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{
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unsigned idx = strtoul(num, NULL, 0);
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if (idx < handle->size)
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handle->cheats[idx].state = true;
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num = strtok_r(NULL, ";", &save);
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}
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free(str);
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config_file_free(conf);
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cheat_manager_apply_cheats(handle);
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}
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static void cheat_manager_save_config(cheat_manager_t *handle,
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const char *path, const char *sha256)
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{
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unsigned i;
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char conf_str[512] = {0};
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char tmp[32] = {0};
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if (!(*path))
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return;
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config_file_t *conf = config_file_new(path);
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if (!conf)
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conf = config_file_new(NULL);
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if (!conf)
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{
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RARCH_ERR("Cannot save XML cheat settings.\n");
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return;
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}
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for (i = 0; i < handle->size; i++)
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{
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if (handle->cheats[i].state)
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{
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snprintf(tmp, sizeof(tmp), "%u;", i);
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strlcat(conf_str, tmp, sizeof(conf_str));
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}
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}
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if (*conf_str)
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conf_str[strlen(conf_str) - 1] = '\0'; /* Remove the trailing ';' */
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config_set_string(conf, sha256, conf_str);
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if (!config_file_write(conf, path))
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RARCH_ERR("Failed to write XML cheat settings to \"%s\". Check permissions.\n", path);
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config_file_free(conf);
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}
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cheat_manager_t *cheat_manager_new(const char *path)
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{
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xmlParserCtxtPtr ctx;
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xmlNodePtr head, cur;
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xmlDocPtr doc;
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cheat_manager_t *handle;
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LIBXML_TEST_VERSION;
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pretro_cheat_reset();
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ctx = NULL;
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doc = NULL;
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handle = (cheat_manager_t*)calloc(1, sizeof(struct cheat_manager));
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if (!handle)
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return NULL;
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head = NULL;
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cur = NULL;
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handle->buf_size = 1;
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handle->cheats = (struct cheat*)
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calloc(handle->buf_size, sizeof(struct cheat));
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if (!handle->cheats)
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{
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handle->buf_size = 0;
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goto error;
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}
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ctx = xmlNewParserCtxt();
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if (!ctx)
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goto error;
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doc = xmlCtxtReadFile(ctx, path, NULL, 0);
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if (!doc)
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{
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RARCH_ERR("Failed to parse XML file: %s\n", path);
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goto error;
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}
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#ifdef HAVE_LIBXML2
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if (ctx->valid == 0)
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{
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RARCH_ERR("Cannot validate XML file: %s\n", path);
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goto error;
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}
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#endif
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head = xmlDocGetRootElement(doc);
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for (cur = head; cur; cur = cur->next)
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{
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if (cur->type == XML_ELEMENT_NODE
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&& strcmp((const char*)cur->name, "database") == 0)
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break;
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}
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if (!cur)
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goto error;
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for (cur = cur->children; cur; cur = cur->next)
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{
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if (cur->type != XML_ELEMENT_NODE)
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continue;
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if (strcmp((const char*)cur->name, "cartridge") == 0)
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{
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xmlChar *sha256 = xmlGetProp(cur, (const xmlChar*)"sha256");
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if (!sha256)
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continue;
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if (*g_extern.sha256 && strcmp((const char*)sha256,
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g_extern.sha256) == 0)
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{
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xmlFree(sha256);
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break;
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}
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xmlFree(sha256);
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}
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}
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if (!cur)
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goto error;
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if (!xml_grab_cheats(handle, cur->children))
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{
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RARCH_ERR("Failed to grab cheats. This should not happen.\n");
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goto error;
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}
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if (handle->size == 0)
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{
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RARCH_ERR("Did not find any cheats in XML file: %s\n", path);
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goto error;
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}
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cheat_manager_load_config(handle,
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g_settings.cheat_settings_path, g_extern.sha256);
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xmlFreeDoc(doc);
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xmlFreeParserCtxt(ctx);
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return handle;
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error:
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cheat_manager_free(handle);
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if (doc)
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xmlFreeDoc(doc);
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if (ctx)
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xmlFreeParserCtxt(ctx);
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return NULL;
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}
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void cheat_manager_free(cheat_manager_t *handle)
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{
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unsigned i;
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if (!handle)
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return;
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if (handle->cheats)
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{
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cheat_manager_save_config(handle,
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g_settings.cheat_settings_path, g_extern.sha256);
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for (i = 0; i < handle->size; i++)
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{
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xmlFree(handle->cheats[i].desc);
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free(handle->cheats[i].code);
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}
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free(handle->cheats);
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}
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free(handle);
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}
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static void cheat_manager_update(cheat_manager_t *handle)
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{
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msg_queue_clear(g_extern.msg_queue);
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char msg[256];
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snprintf(msg, sizeof(msg), "Cheat: #%u [%s]: %s",
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handle->ptr, handle->cheats[handle->ptr].state ? "ON" : "OFF",
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handle->cheats[handle->ptr].desc);
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msg_queue_push(g_extern.msg_queue, msg, 1, 180);
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RARCH_LOG("%s\n", msg);
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}
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void cheat_manager_toggle(cheat_manager_t *handle)
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{
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if (!handle)
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return;
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handle->cheats[handle->ptr].state ^= true;
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cheat_manager_apply_cheats(handle);
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cheat_manager_update(handle);
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}
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void cheat_manager_index_next(cheat_manager_t *handle)
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{
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if (!handle)
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return;
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handle->ptr = (handle->ptr + 1) % handle->size;
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cheat_manager_update(handle);
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}
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void cheat_manager_index_prev(cheat_manager_t *handle)
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{
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if (!handle)
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return;
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if (handle->ptr == 0)
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handle->ptr = handle->size - 1;
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else
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handle->ptr--;
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cheat_manager_update(handle);
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}
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