diff options
| -rw-r--r-- | source/memmap.c | 207 |
1 files changed, 104 insertions, 103 deletions
diff --git a/source/memmap.c b/source/memmap.c index ad9fbb1..e4e86d9 100644 --- a/source/memmap.c +++ b/source/memmap.c @@ -573,6 +573,110 @@ void FreeSDD1Data() } } +#ifndef LOAD_FROM_MEMORY_TEST +#define IPS_EOF 0x00454F46l + +static void CheckForIPSPatch(const char* rom_filename, bool header, + int32_t* rom_size) +{ + char dir [_MAX_DIR + 1]; + char drive [_MAX_DRIVE + 1]; + char name [_MAX_FNAME + 1]; + char ext [_MAX_EXT + 1]; + char fname [_MAX_PATH + 1]; + FILE* patch_file = NULL; + long offset = header ? 512 : 0; + + _splitpath(rom_filename, drive, dir, name, ext); + _makepath(fname, drive, dir, name, "ips"); + + if (!(patch_file = fopen(fname, "rb"))) + { + if (!(patch_file = fopen(S9xGetFilename("ips"), "rb"))) + return; + } + + if (fread((unsigned char*)fname, 1, 5, patch_file) != 5 || + strncmp(fname, "PATCH", 5) != 0) + { + fclose(patch_file); + return; + } + + int32_t ofs; + + for (;;) + { + long len; + long rlen; + int rchar; + + ofs = ReadInt(patch_file, 3); + if (ofs == -1) + goto err_eof; + + if (ofs == IPS_EOF) + break; + + ofs -= offset; + + len = ReadInt(patch_file, 2); + if (len == -1) + goto err_eof; + + /* Apply patch block */ + if (len) + { + if (ofs + len > MAX_ROM_SIZE) + goto err_eof; + + while (len--) + { + rchar = fgetc(patch_file); + if (rchar == EOF) + goto err_eof; + Memory.ROM [ofs++] = (uint8_t) rchar; + } + if (ofs > *rom_size) + *rom_size = ofs; + } + else + { + rlen = ReadInt(patch_file, 2); + if (rlen == -1) + goto err_eof; + + rchar = fgetc(patch_file); + if (rchar == EOF) + goto err_eof; + + if (ofs + rlen > MAX_ROM_SIZE) + goto err_eof; + + while (rlen--) + Memory.ROM [ofs++] = (uint8_t) rchar; + + if (ofs > *rom_size) + *rom_size = ofs; + } + } + + // Check if ROM image needs to be truncated + ofs = ReadInt(patch_file, 3); + if (ofs != -1 && ofs - offset < *rom_size) + { + // Need to truncate ROM image + *rom_size = ofs - offset; + } + fclose(patch_file); + return; + +err_eof: + if (patch_file) + fclose(patch_file); +} +#endif + /**********************************************************************************************/ /* LoadROM() */ /* This function loads a Snes-Backup image */ @@ -4037,109 +4141,6 @@ static long ReadInt(FILE* f, unsigned nbytes) return (v); } -#ifndef LOAD_FROM_MEMORY_TEST -#define IPS_EOF 0x00454F46l - -static void CheckForIPSPatch(const char* rom_filename, bool header, - int32_t* rom_size) -{ - char dir [_MAX_DIR + 1]; - char drive [_MAX_DRIVE + 1]; - char name [_MAX_FNAME + 1]; - char ext [_MAX_EXT + 1]; - char fname [_MAX_PATH + 1]; - FILE* patch_file = NULL; - long offset = header ? 512 : 0; - - _splitpath(rom_filename, drive, dir, name, ext); - _makepath(fname, drive, dir, name, "ips"); - - if (!(patch_file = fopen(fname, "rb"))) - { - if (!(patch_file = fopen(S9xGetFilename("ips"), "rb"))) - return; - } - - if (fread((unsigned char*)fname, 1, 5, patch_file) != 5 || - strncmp(fname, "PATCH", 5) != 0) - { - fclose(patch_file); - return; - } - - int32_t ofs; - - for (;;) - { - long len; - long rlen; - int rchar; - - ofs = ReadInt(patch_file, 3); - if (ofs == -1) - goto err_eof; - - if (ofs == IPS_EOF) - break; - - ofs -= offset; - - len = ReadInt(patch_file, 2); - if (len == -1) - goto err_eof; - - /* Apply patch block */ - if (len) - { - if (ofs + len > MAX_ROM_SIZE) - goto err_eof; - - while (len--) - { - rchar = fgetc(patch_file); - if (rchar == EOF) - goto err_eof; - Memory.ROM [ofs++] = (uint8_t) rchar; - } - if (ofs > *rom_size) - *rom_size = ofs; - } - else - { - rlen = ReadInt(patch_file, 2); - if (rlen == -1) - goto err_eof; - - rchar = fgetc(patch_file); - if (rchar == EOF) - goto err_eof; - - if (ofs + rlen > MAX_ROM_SIZE) - goto err_eof; - - while (rlen--) - Memory.ROM [ofs++] = (uint8_t) rchar; - - if (ofs > *rom_size) - *rom_size = ofs; - } - } - - // Check if ROM image needs to be truncated - ofs = ReadInt(patch_file, 3); - if (ofs != -1 && ofs - offset < *rom_size) - { - // Need to truncate ROM image - *rom_size = ofs - offset; - } - fclose(patch_file); - return; - -err_eof: - if (patch_file) - fclose(patch_file); -} -#endif int is_bsx(unsigned char* p) { |