mirror of
https://github.com/CTCaer/RetroArch.git
synced 2024-12-22 10:49:02 +00:00
487 lines
13 KiB
C
487 lines
13 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 "file.h"
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#include "general.h"
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#include <stdlib.h>
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#include "boolean.h"
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#include "libretro.h"
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#include <string.h>
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#include <time.h>
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#include "dynamic.h"
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#include "movie.h"
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#include "patch.h"
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#include "compat/strl.h"
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#include "hash.h"
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#include "file_extract.h"
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#ifdef _WIN32
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#ifdef _XBOX
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#include <xtl.h>
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#define setmode _setmode
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#define INVALID_FILE_ATTRIBUTES -1
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#else
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#include <io.h>
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#include <fcntl.h>
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#include <windows.h>
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#endif
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#endif
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static void patch_rom(uint8_t **buf, ssize_t *size)
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{
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uint8_t *ret_buf = *buf;
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ssize_t ret_size = *size;
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const char *patch_desc = NULL;
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const char *patch_path = NULL;
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patch_error_t err = PATCH_UNKNOWN;
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patch_func_t func = NULL;
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ssize_t patch_size = 0;
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void *patch_data = NULL;
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bool success = false;
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if (g_extern.ups_pref + g_extern.bps_pref + g_extern.ips_pref > 1)
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{
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RARCH_WARN("Several patches are explicitly defined, ignoring all ...\n");
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return;
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}
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bool allow_bps = !g_extern.ups_pref && !g_extern.ips_pref;
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bool allow_ups = !g_extern.bps_pref && !g_extern.ips_pref;
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bool allow_ips = !g_extern.ups_pref && !g_extern.bps_pref;
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if (allow_ups && *g_extern.ups_name && (patch_size = read_file(g_extern.ups_name, &patch_data)) >= 0)
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{
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patch_desc = "UPS";
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patch_path = g_extern.ups_name;
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func = ups_apply_patch;
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}
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else if (allow_bps && *g_extern.bps_name && (patch_size = read_file(g_extern.bps_name, &patch_data)) >= 0)
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{
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patch_desc = "BPS";
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patch_path = g_extern.bps_name;
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func = bps_apply_patch;
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}
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else if (allow_ips && *g_extern.ips_name && (patch_size = read_file(g_extern.ips_name, &patch_data)) >= 0)
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{
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patch_desc = "IPS";
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patch_path = g_extern.ips_name;
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func = ips_apply_patch;
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}
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else
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{
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RARCH_LOG("Did not find a valid content patch.\n");
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return;
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}
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RARCH_LOG("Found %s file in \"%s\", attempting to patch ...\n", patch_desc, patch_path);
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size_t target_size = ret_size * 4; // Just to be sure ...
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uint8_t *patched_rom = (uint8_t*)malloc(target_size);
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if (!patched_rom)
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{
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RARCH_ERR("Failed to allocate memory for patched content ...\n");
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goto error;
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}
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err = func((const uint8_t*)patch_data, patch_size, ret_buf, ret_size, patched_rom, &target_size);
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if (err == PATCH_SUCCESS)
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{
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RARCH_LOG("Content patched successfully (%s).\n", patch_desc);
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success = true;
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}
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else
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RARCH_ERR("Failed to patch %s: Error #%u\n", patch_desc, (unsigned)err);
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if (success)
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{
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free(ret_buf);
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*buf = patched_rom;
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*size = target_size;
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}
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free(patch_data);
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return;
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error:
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*buf = ret_buf;
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*size = ret_size;
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free(patch_data);
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}
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static ssize_t read_rom_file(const char *path, void **buf)
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{
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uint8_t *ret_buf = NULL;
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ssize_t ret = read_file(path, (void**)&ret_buf);
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if (ret <= 0)
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return ret;
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if (!g_extern.block_patch)
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{
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// Attempt to apply a patch.
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patch_rom(&ret_buf, &ret);
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}
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g_extern.content_crc = crc32_calculate(ret_buf, ret);
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sha256_hash(g_extern.sha256, ret_buf, ret);
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RARCH_LOG("CRC32: 0x%x, SHA256: %s\n",
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(unsigned)g_extern.content_crc, g_extern.sha256);
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*buf = ret_buf;
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return ret;
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}
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// Attempt to save valuable RAM data somewhere ...
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static void dump_to_file_desperate(const void *data, size_t size, unsigned type)
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{
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#if defined(_WIN32) && !defined(_XBOX)
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const char *base = getenv("APPDATA");
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#elif defined(__CELLOS_LV2__) || defined(_XBOX)
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const char *base = NULL;
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#else
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const char *base = getenv("HOME");
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#endif
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if (!base)
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goto error;
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char path[PATH_MAX];
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snprintf(path, sizeof(path), "%s/RetroArch-recovery-%u", base, type);
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char timebuf[PATH_MAX];
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time_t time_;
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time(&time_);
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strftime(timebuf, sizeof(timebuf), "%Y-%m-%d-%H-%M-%S", localtime(&time_));
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strlcat(path, timebuf, sizeof(path));
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if (write_file(path, data, size))
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RARCH_WARN("Succeeded in saving RAM data to \"%s\".\n", path);
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else
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goto error;
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return;
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error:
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RARCH_WARN("Failed ... Cannot recover save file.\n");
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}
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bool save_state(const char *path)
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{
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RARCH_LOG("Saving state: \"%s\".\n", path);
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size_t size = pretro_serialize_size();
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if (size == 0)
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return false;
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void *data = malloc(size);
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if (!data)
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{
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RARCH_ERR("Failed to allocate memory for save state buffer.\n");
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return false;
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}
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RARCH_LOG("State size: %d bytes.\n", (int)size);
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bool ret = pretro_serialize(data, size);
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if (ret)
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ret = write_file(path, data, size);
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if (!ret)
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RARCH_ERR("Failed to save state to \"%s\".\n", path);
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free(data);
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return ret;
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}
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struct sram_block
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{
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unsigned type;
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void *data;
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size_t size;
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};
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bool load_state(const char *path)
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{
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unsigned i;
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void *buf = NULL;
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ssize_t size = read_file(path, &buf);
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RARCH_LOG("Loading state: \"%s\".\n", path);
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if (size < 0)
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{
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RARCH_ERR("Failed to load state from \"%s\".\n", path);
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return false;
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}
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bool ret = true;
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RARCH_LOG("State size: %u bytes.\n", (unsigned)size);
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struct sram_block *blocks = NULL;
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unsigned num_blocks = 0;
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if (g_settings.block_sram_overwrite && g_extern.savefiles && g_extern.savefiles->size)
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{
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RARCH_LOG("Blocking SRAM overwrite.\n");
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blocks = (struct sram_block*)calloc(g_extern.savefiles->size, sizeof(*blocks));
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if (blocks)
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{
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num_blocks = g_extern.savefiles->size;
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for (i = 0; i < num_blocks; i++)
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blocks[i].type = g_extern.savefiles->elems[i].attr.i;
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}
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}
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for (i = 0; i < num_blocks; i++)
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blocks[i].size = pretro_get_memory_size(blocks[i].type);
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for (i = 0; i < num_blocks; i++)
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if (blocks[i].size)
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blocks[i].data = malloc(blocks[i].size);
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// Backup current SRAM which is overwritten by unserialize.
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for (i = 0; i < num_blocks; i++)
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{
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if (blocks[i].data)
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{
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const void *ptr = pretro_get_memory_data(blocks[i].type);
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if (ptr)
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memcpy(blocks[i].data, ptr, blocks[i].size);
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}
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}
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ret = pretro_unserialize(buf, size);
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// Flush back :D
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for (i = 0; i < num_blocks; i++)
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{
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if (blocks[i].data)
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{
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void *ptr = pretro_get_memory_data(blocks[i].type);
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if (ptr)
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memcpy(ptr, blocks[i].data, blocks[i].size);
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}
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}
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for (i = 0; i < num_blocks; i++)
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free(blocks[i].data);
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free(blocks);
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return ret;
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}
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void load_ram_file(const char *path, int type)
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{
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size_t size = pretro_get_memory_size(type);
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void *data = pretro_get_memory_data(type);
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if (size == 0 || !data)
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return;
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void *buf = NULL;
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ssize_t rc = read_file(path, &buf);
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if (rc > 0)
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{
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if (rc > (ssize_t)size)
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{
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RARCH_WARN("SRAM is larger than implementation expects, doing partial load (truncating %u bytes to %u).\n",
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(unsigned)rc, (unsigned)size);
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rc = size;
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}
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memcpy(data, buf, rc);
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}
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free(buf);
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}
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void save_ram_file(const char *path, int type)
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{
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size_t size = pretro_get_memory_size(type);
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void *data = pretro_get_memory_data(type);
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if (data && size > 0)
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{
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if (!write_file(path, data, size))
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{
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RARCH_ERR("Failed to save SRAM.\n");
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RARCH_WARN("Attempting to recover ...\n");
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dump_to_file_desperate(data, size, type);
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}
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else
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RARCH_LOG("Saved successfully to \"%s\".\n", path);
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}
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}
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static bool load_content(const struct retro_subsystem_info *special, const struct string_list *content)
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{
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unsigned i;
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bool ret = true;
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struct retro_game_info *info = (struct retro_game_info*)calloc(content->size, sizeof(*info));
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if (!info)
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return false;
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for (i = 0; i < content->size; i++)
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{
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const char *path = content->elems[i].data;
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int attr = content->elems[i].attr.i;
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bool need_fullpath = attr & 2;
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bool require_rom = attr & 4;
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if (require_rom && !*path)
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{
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RARCH_LOG("libretro core requires content, but nothing was provided.\n");
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ret = false;
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goto end;
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}
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info[i].path = *path ? path : NULL;
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if (!need_fullpath && *path) // Load the content into memory.
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{
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RARCH_LOG("Loading content file: %s.\n", path);
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// First content file is significant, attempt to do patching, CRC checking, etc ...
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long size = i == 0 ? read_rom_file(path, (void**)&info[i].data) : read_file(path, (void**)&info[i].data);
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if (size < 0)
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{
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RARCH_ERR("Could not read content file \"%s\".\n", path);
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ret = false;
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goto end;
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}
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info[i].size = size;
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}
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else
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RARCH_LOG("Content loading skipped. Implementation will load it on its own.\n");
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}
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if (special)
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ret = pretro_load_game_special(special->id, info, content->size);
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else
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ret = pretro_load_game(*content->elems[0].data ? info : NULL);
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if (!ret)
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RARCH_ERR("Failed to load game.\n");
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end:
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for (i = 0; i < content->size; i++)
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free((void*)info[i].data);
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free(info);
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return ret;
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}
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bool init_rom_file(void)
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{
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unsigned i;
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g_extern.temporary_content = string_list_new();
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if (!g_extern.temporary_content)
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return false;
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const struct retro_subsystem_info *special = NULL;
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if (*g_extern.subsystem)
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{
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special = libretro_find_subsystem_info(g_extern.system.special, g_extern.system.num_special,
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g_extern.subsystem);
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if (!special)
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{
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RARCH_ERR("Failed to find subsystem \"%s\" in libretro implementation.\n",
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g_extern.subsystem);
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return false;
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}
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if (special->num_roms && !g_extern.subsystem_fullpaths)
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{
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RARCH_ERR("libretro core requires special content, but none were provided.\n");
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return false;
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}
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else if (special->num_roms && special->num_roms != g_extern.subsystem_fullpaths->size)
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{
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RARCH_ERR("libretro core requires %u content files for subsystem \"%s\", but %u content files were provided.\n", special->num_roms, special->desc,
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(unsigned)g_extern.subsystem_fullpaths->size);
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return false;
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}
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else if (!special->num_roms && g_extern.subsystem_fullpaths && g_extern.subsystem_fullpaths->size)
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{
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RARCH_ERR("libretro core takes no content for subsystem \"%s\", but %u content files were provided.\n", special->desc,
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(unsigned)g_extern.subsystem_fullpaths->size);
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return false;
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}
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}
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union string_list_elem_attr attr;
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attr.i = 0;
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struct string_list *content = (struct string_list*)string_list_new();
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if (!content)
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return false;
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if (*g_extern.subsystem)
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{
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for (i = 0; i < g_extern.subsystem_fullpaths->size; i++)
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{
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attr.i = special->roms[i].block_extract;
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attr.i |= special->roms[i].need_fullpath << 1;
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attr.i |= special->roms[i].required << 2;
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string_list_append(content, g_extern.subsystem_fullpaths->elems[i].data, attr);
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}
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}
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else
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{
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attr.i = g_extern.system.info.block_extract;
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attr.i |= g_extern.system.info.need_fullpath << 1;
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attr.i |= (!g_extern.system.no_content) << 2;
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string_list_append(content, g_extern.libretro_no_content ? "" : g_extern.fullpath, attr);
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}
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#ifdef HAVE_ZLIB
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// Try to extract all content we're going to load if appropriate.
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for (i = 0; i < content->size; i++)
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{
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// block extract check
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if (content->elems[i].attr.i & 1)
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continue;
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const char *ext = path_get_extension(content->elems[i].data);
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const char *valid_ext = special ?
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special->roms[i].valid_extensions :
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g_extern.system.info.valid_extensions;
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if (ext && !strcasecmp(ext, "zip"))
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{
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char temporary_content[PATH_MAX];
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strlcpy(temporary_content, content->elems[i].data, sizeof(temporary_content));
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if (!zlib_extract_first_rom(temporary_content, sizeof(temporary_content), valid_ext,
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*g_settings.extraction_directory ? g_settings.extraction_directory : NULL))
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{
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RARCH_ERR("Failed to extract content from zipped file: %s.\n", temporary_content);
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string_list_free(content);
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return false;
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}
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string_list_set(content, i, temporary_content);
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string_list_append(g_extern.temporary_content, temporary_content, attr);
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}
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}
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#endif
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// Set attr to need_fullpath as appropriate.
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bool ret = load_content(special, content);
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string_list_free(content);
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return ret;
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}
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