INPUT_PORTS_END
static void pce_partialhash(hash_collection &dest, const unsigned char *data,
unsigned long length, const char *functions)
{
if ( ( length <= PCE_HEADER_SIZE ) || ( length & PCE_HEADER_SIZE ) ) {
dest.compute(&data[PCE_HEADER_SIZE], length - PCE_HEADER_SIZE, functions);
} else {
dest.compute(data, length, functions);
}
}
void device_image_interface::run_hash(void (*partialhash)(hash_collection &, const unsigned char *, unsigned long, const char *),
hash_collection &hashes, const char *types)
{
UINT32 size;
UINT8 *buf = NULL;
hashes.reset();
size = (UINT32) length();
buf = (UINT8*)malloc(size);
memset(buf,0,size);
/* read the file */
fseek(0, SEEK_SET);
fread(buf, size);
if (partialhash)
partialhash(hashes, buf, size, types);
else
hashes.compute(buf, size, types);
/* cleanup */
free(buf);
fseek(0, SEEK_SET);
}
/* Header format
0 Header version - 1 byte
1..16 "ATARI7800 " - 16 bytes
17..48 Cart title - 32 bytes
49..52 data length - 4 bytes
53..54 cart type - 2 bytes
bit 0 0x01 - pokey cart
bit 1 0x02 - supercart bank switched
bit 2 0x04 - supercart RAM at $4000
bit 3 0x08 - additional state->m_ROM at $4000
bit 8-15 - Special
0 = Normal cart
1 = Absolute (F18 Hornet)
2 = Activision
55 controller 1 type - 1 byte
56 controller 2 type - 1 byte
0 = None
1 = Joystick
2 = Light Gun
57 0 = NTSC/1 = PAL
100..127 "ACTUAL CART DATA STARTS HERE" - 28 bytes
Versions:
Version 0: Initial release
Version 1: Added PAL/NTSC bit. Added Special cart byte.
Changed 53 bit 2, added bit 3
*/
void a7800_partialhash(hash_collection &dest, const unsigned char *data,
unsigned long length, const char *functions)
{
if (length <= 128)
return;
dest.compute(&data[128], length - 128, functions);
}
void device_image_interface::device_compute_hash(hash_collection &hashes, const void *data, size_t length, const char *types) const
{
/* retrieve the partial hash func */
device_image_partialhash_func partialhash = get_partial_hash();
/* compute the hash */
if (partialhash)
partialhash(hashes, (const unsigned char*)data, length, types);
else
hashes.compute(reinterpret_cast<const UINT8 *>(data), length, types);
}
void device_image_interface::run_hash(void (*partialhash)(hash_collection &, const unsigned char *, unsigned long, const char *),
hash_collection &hashes, const char *types)
{
UINT32 size;
dynamic_buffer buf;
hashes.reset();
size = (UINT32) length();
buf.resize_and_clear(size);
/* read the file */
fseek(0, SEEK_SET);
fread(buf, size);
if (partialhash)
partialhash(hashes, buf, size, types);
else
hashes.compute(buf, size, types);
/* cleanup */
fseek(0, SEEK_SET);
}