static bool chd_get_crc(database_state_handle_t *db_state,
const char *name, uint32_t *crc)
{
intfstream_t *fd = NULL;
uint32_t acc = 0;
uint8_t buffer[4096];
ssize_t size;
fd = open_chd_track(name, CHDSTREAM_TRACK_FIRST_DATA);
if (!fd)
{
return 0;
}
while ((size = intfstream_read(fd, buffer, sizeof(buffer))) > 0)
{
acc = encoding_crc32(acc, buffer, size);
}
if (size < 0)
{
return 0;
}
RARCH_LOG("CHD '%s' crc: %x\n", name, acc);
*crc = acc;
return 1;
}
static bool intfstream_file_get_serial(const char *name,
uint64_t offset, uint64_t size, char *serial)
{
int rv;
uint8_t *data = NULL;
int64_t file_size = -1;
intfstream_t *fd = intfstream_open_file(name,
RETRO_VFS_FILE_ACCESS_READ, RETRO_VFS_FILE_ACCESS_HINT_NONE);
if (!fd)
return 0;
if (intfstream_seek(fd, 0, SEEK_END) == -1)
goto error;
file_size = intfstream_tell(fd);
if (intfstream_seek(fd, 0, SEEK_SET) == -1)
goto error;
if (file_size < 0)
goto error;
if (offset != 0 || size < (uint64_t) file_size)
{
if (intfstream_seek(fd, (int64_t)offset, SEEK_SET) == -1)
goto error;
data = (uint8_t*)malloc((size_t)size);
if (intfstream_read(fd, data, size) != (int64_t) size)
{
free(data);
goto error;
}
intfstream_close(fd);
free(fd);
fd = intfstream_open_memory(data, RETRO_VFS_FILE_ACCESS_READ,
RETRO_VFS_FILE_ACCESS_HINT_NONE,
size);
if (!fd)
{
free(data);
return 0;
}
}
rv = intfstream_get_serial(fd, serial);
intfstream_close(fd);
free(fd);
free(data);
return rv;
error:
intfstream_close(fd);
free(fd);
return 0;
}
static int intfstream_get_crc(intfstream_t *fd, uint32_t *crc)
{
int64_t read = 0;
uint32_t acc = 0;
uint8_t buffer[4096];
while ((read = intfstream_read(fd, buffer, sizeof(buffer))) > 0)
acc = encoding_crc32(acc, buffer, (size_t)read);
if (read < 0)
return 0;
*crc = acc;
return 1;
}
