mirror of
https://github.com/CTCaer/RetroArch.git
synced 2024-12-25 04:06:18 +00:00
466 lines
11 KiB
C
466 lines
11 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2011-2017 - Daniel De Matteis
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* Copyright (C) 2014-2017 - Jean-André Santoni
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* Copyright (C) 2016-2017 - Brad Parker
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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 <errno.h>
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#include <ctype.h>
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#include <string.h>
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#include <retro_miscellaneous.h>
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#include <compat/strcasestr.h>
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#include <compat/strl.h>
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#include <file/file_path.h>
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#include <retro_endianness.h>
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#include <streams/file_stream.h>
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#include <string/stdstring.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 "../database_info.h"
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#include "tasks_internal.h"
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#include "../driver.h"
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#include "../list_special.h"
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#include "../msg_hash.h"
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#include "../verbosity.h"
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#define MAGIC_LEN 17
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#define MAX_TOKEN_LEN 255
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#ifdef MSB_FIRST
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#define MODETEST_VAL 0x00ffffff
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#else
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#define MODETEST_VAL 0xffffff00
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#endif
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struct magic_entry
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{
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int32_t offset;
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const char *system_name;
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const char *magic;
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};
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static struct magic_entry MAGIC_NUMBERS[] = {
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{ 0, "ps1", "\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\x00\x00\x02\x00\x02\x00"},
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{ 0x838840, "pcecd", "\x82\xb1\x82\xcc\x83\x76\x83\x8d\x83\x4f\x83\x89\x83\x80\x82\xcc\x92"},
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{ 0, "scd", "\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\x00\x00\x02\x00\x01\x53"},
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{ 0, NULL, NULL}
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};
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static ssize_t get_token(RFILE *fd, char *token, size_t max_len)
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{
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char *c = token;
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ssize_t len = 0;
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int in_string = 0;
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while (1)
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{
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int rv = (int)filestream_read(fd, c, 1);
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if (rv == 0)
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return 0;
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if (rv < 1)
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{
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switch (errno)
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{
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case EINTR:
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case EAGAIN:
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continue;
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default:
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return -errno;
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}
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}
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switch (*c)
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{
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case ' ':
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case '\t':
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case '\r':
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case '\n':
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if (c == token)
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continue;
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if (!in_string)
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{
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*c = '\0';
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return len;
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}
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break;
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case '\"':
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if (c == token)
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{
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in_string = 1;
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continue;
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}
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*c = '\0';
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return len;
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}
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len++;
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c++;
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if (len == (ssize_t)max_len)
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{
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*c = '\0';
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return len;
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}
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}
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}
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static int find_token(RFILE *fd, const char *token)
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{
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int tmp_len = (int)strlen(token);
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char *tmp_token = (char*)calloc(tmp_len+1, 1);
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if (!tmp_token)
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return -1;
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while (strncmp(tmp_token, token, tmp_len) != 0)
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{
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if (get_token(fd, tmp_token, tmp_len) <= 0)
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{
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free(tmp_token);
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return -1;
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}
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}
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free(tmp_token);
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return 0;
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}
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static int detect_ps1_game_sub(const char *track_path,
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char *game_id, int sub_channel_mixed)
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{
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uint8_t* tmp;
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uint8_t* boot_file;
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int skip, frame_size, is_mode1, cd_sector;
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uint8_t buffer[2048 * 2];
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RFILE *fp =
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filestream_open(track_path, RFILE_MODE_READ, -1);
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if (!fp)
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return 0;
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buffer[0] = '\0';
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is_mode1 = 0;
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filestream_seek(fp, 0, SEEK_END);
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if (!sub_channel_mixed)
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{
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if (!(filestream_tell(fp) & 0x7FF))
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{
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unsigned int mode_test = 0;
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filestream_seek(fp, 0, SEEK_SET);
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filestream_read(fp, &mode_test, 4);
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if (mode_test != MODETEST_VAL)
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is_mode1 = 1;
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}
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}
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skip = is_mode1? 0: 24;
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frame_size = sub_channel_mixed? 2448: is_mode1? 2048: 2352;
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filestream_seek(fp, 156 + skip + 16 * frame_size, SEEK_SET);
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filestream_read(fp, buffer, 6);
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cd_sector = buffer[2] | (buffer[3] << 8) | (buffer[4] << 16);
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filestream_seek(fp, skip + cd_sector * frame_size, SEEK_SET);
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filestream_read(fp, buffer, 2048 * 2);
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tmp = buffer;
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while (tmp < (buffer + 2048 * 2))
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{
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if (!*tmp)
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goto error;
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if (!strncasecmp((const char*)(tmp + 33), "SYSTEM.CNF;1", 12))
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break;
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tmp += *tmp;
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}
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if(tmp >= (buffer + 2048 * 2))
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goto error;
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cd_sector = tmp[2] | (tmp[3] << 8) | (tmp[4] << 16);
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filestream_seek(fp, skip + cd_sector * frame_size, SEEK_SET);
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filestream_read(fp, buffer, 256);
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buffer[256] = '\0';
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tmp = buffer;
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while(*tmp && strncasecmp((const char*)tmp, "boot", 4))
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tmp++;
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if(!*tmp)
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goto error;
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boot_file = tmp;
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while(*tmp && *tmp != '\n')
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{
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if((*tmp == '\\') || (*tmp == ':'))
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boot_file = tmp + 1;
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tmp++;
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}
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tmp = boot_file;
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*game_id++ = toupper(*tmp++);
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*game_id++ = toupper(*tmp++);
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*game_id++ = toupper(*tmp++);
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*game_id++ = toupper(*tmp++);
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*game_id++ = '-';
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if(!isalnum(*tmp))
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tmp++;
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while(isalnum(*tmp))
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{
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*game_id++ = *tmp++;
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if(*tmp == '.')
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tmp++;
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}
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*game_id = 0;
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filestream_close(fp);
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return 1;
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error:
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filestream_close(fp);
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return 0;
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}
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int detect_ps1_game(const char *track_path, char *game_id)
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{
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if (detect_ps1_game_sub(track_path, game_id, 0))
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return 1;
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return detect_ps1_game_sub(track_path, game_id, 1);
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}
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int detect_psp_game(const char *track_path, char *game_id)
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{
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unsigned pos;
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bool rv = false;
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RFILE *fd = filestream_open(track_path, RFILE_MODE_READ, -1);
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if (!fd)
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{
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RARCH_LOG("%s: %s\n",
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msg_hash_to_str(MSG_COULD_NOT_OPEN_DATA_TRACK),
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strerror(errno));
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return -errno;
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}
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for (pos = 0; pos < 100000; pos++)
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{
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filestream_seek(fd, pos, SEEK_SET);
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if (filestream_read(fd, game_id, 5) > 0)
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{
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game_id[5] = '\0';
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if (!string_is_empty(game_id))
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{
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if (
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(string_is_equal_fast(game_id, "ULES-", 5))
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|| (string_is_equal_fast(game_id, "ULUS-", 5))
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|| (string_is_equal_fast(game_id, "ULJS-", 5))
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|| (string_is_equal_fast(game_id, "ULEM-", 5))
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|| (string_is_equal_fast(game_id, "ULUM-", 5))
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|| (string_is_equal_fast(game_id, "ULJM-", 5))
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|| (string_is_equal_fast(game_id, "UCES-", 5))
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|| (string_is_equal_fast(game_id, "UCUS-", 5))
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|| (string_is_equal_fast(game_id, "UCJS-", 5))
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|| (string_is_equal_fast(game_id, "UCAS-", 5))
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|| (string_is_equal_fast(game_id, "NPEH-", 5))
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|| (string_is_equal_fast(game_id, "NPUH-", 5))
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|| (string_is_equal_fast(game_id, "NPJH-", 5))
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|| (string_is_equal_fast(game_id, "NPEG-", 5))
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|| (string_is_equal_fast(game_id, "NPUG-", 5))
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|| (string_is_equal_fast(game_id, "NPJG-", 5))
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|| (string_is_equal_fast(game_id, "NPHG-", 5))
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|| (string_is_equal_fast(game_id, "NPEZ-", 5))
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|| (string_is_equal_fast(game_id, "NPUZ-", 5))
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|| (string_is_equal_fast(game_id, "NPJZ-", 5))
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)
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{
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filestream_seek(fd, pos, SEEK_SET);
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if (filestream_read(fd, game_id, 10) > 0)
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{
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#if 0
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game_id[4] = '-';
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game_id[8] = game_id[9];
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game_id[9] = game_id[10];
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#endif
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game_id[10] = '\0';
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rv = true;
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}
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break;
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}
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}
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}
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else
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break;
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}
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filestream_close(fd);
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return rv;
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}
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int detect_system(const char *track_path, const char **system_name)
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{
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int rv;
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char magic[MAGIC_LEN];
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int i;
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RFILE *fd = filestream_open(track_path, RFILE_MODE_READ, -1);
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if (!fd)
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{
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RARCH_LOG("Could not open data track of file '%s': %s\n",
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track_path, strerror(errno));
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rv = -errno;
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goto clean;
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}
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RARCH_LOG("%s\n", msg_hash_to_str(MSG_COMPARING_WITH_KNOWN_MAGIC_NUMBERS));
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for (i = 0; MAGIC_NUMBERS[i].system_name != NULL; i++)
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{
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filestream_seek(fd, MAGIC_NUMBERS[i].offset, SEEK_SET);
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if (filestream_read(fd, magic, MAGIC_LEN) < MAGIC_LEN)
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{
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RARCH_LOG("Could not read data from file '%s' at offset %d: %s\n",
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track_path, MAGIC_NUMBERS[i].offset, strerror(errno));
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rv = -errno;
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goto clean;
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}
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if (!string_is_empty(MAGIC_NUMBERS[i].magic) &&
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!string_is_empty(magic) &&
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string_is_equal_fast(MAGIC_NUMBERS[i].magic, magic, MAGIC_LEN))
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{
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*system_name = MAGIC_NUMBERS[i].system_name;
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rv = 0;
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goto clean;
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}
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}
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filestream_seek(fd, 0x8008, SEEK_SET);
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if (filestream_read(fd, magic, 8) > 0)
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{
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magic[8] = '\0';
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if (!string_is_empty(magic) &&
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string_is_equal_fast(magic, "PSP GAME", 8))
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{
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*system_name = "psp\0";
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rv = 0;
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goto clean;
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}
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}
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RARCH_LOG("%s\n", msg_hash_to_str(MSG_COULD_NOT_FIND_COMPATIBLE_SYSTEM));
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rv = -EINVAL;
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clean:
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filestream_close(fd);
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return rv;
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}
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int find_first_data_track(const char *cue_path,
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int32_t *offset, char *track_path, size_t max_len)
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{
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int rv;
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char tmp_token[MAX_TOKEN_LEN];
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RFILE *fd =
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filestream_open(cue_path, RFILE_MODE_READ, -1);
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if (!fd)
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{
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RARCH_LOG("Could not open CUE file '%s': %s\n", cue_path,
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strerror(errno));
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return -errno;
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}
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RARCH_LOG("Parsing CUE file '%s'...\n", cue_path);
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tmp_token[0] = '\0';
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while (get_token(fd, tmp_token, MAX_TOKEN_LEN) > 0)
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{
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if (!string_is_empty(tmp_token))
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{
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if (string_is_equal_fast(tmp_token, "FILE", 4))
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{
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char cue_dir[PATH_MAX_LENGTH];
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cue_dir[0] = '\0';
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fill_pathname_basedir(cue_dir, cue_path, sizeof(cue_dir));
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get_token(fd, tmp_token, MAX_TOKEN_LEN);
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fill_pathname_join(track_path, cue_dir, tmp_token, max_len);
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}
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else if (string_is_equal_fast(tmp_token, "TRACK", 5))
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{
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int m, s, f;
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get_token(fd, tmp_token, MAX_TOKEN_LEN);
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get_token(fd, tmp_token, MAX_TOKEN_LEN);
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if (string_is_equal_fast(tmp_token, "AUDIO", 5))
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continue;
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find_token(fd, "INDEX");
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get_token(fd, tmp_token, MAX_TOKEN_LEN);
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get_token(fd, tmp_token, MAX_TOKEN_LEN);
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if (sscanf(tmp_token, "%02d:%02d:%02d", &m, &s, &f) < 3)
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{
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RARCH_LOG("Error parsing time stamp '%s'\n", tmp_token);
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filestream_close(fd);
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return -errno;
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}
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*offset = ((m * 60) * (s * 75) * f) * 25;
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RARCH_LOG("%s '%s+%d'\n",
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msg_hash_to_str(MSG_FOUND_FIRST_DATA_TRACK_ON_FILE),
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track_path, *offset);
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rv = 0;
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goto clean;
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}
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}
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}
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rv = -EINVAL;
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clean:
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filestream_close(fd);
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return rv;
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}
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