void a7800_partialhash(char *dest, const unsigned char *data,
unsigned long length, unsigned int functions)
{
if (length <= 128)
return;
hash_compute(dest, &data[128], length - 128, functions);
}
/* Her elemani bir bagli liste gostericisi olan table
* dizisi parametre olarak veriliyor. Bu table dizisi
* aslinda hash veriyapisini temsil eder.
*
* str ile verilen string hash'te var ise adresi
* dondurulur. Yoksa ve create == 1 ise, hash
* veriyapisina bu string eklenir.*/
Key* hash_lookup(Key **table, const char *str, int create) {
/* TODO 1 */
int n=hash_compute(str);
if(table[n]!=NULL){
struct key *tmp=table[n];
while(tmp->next!=NULL){
if(tmp->word==str){
return tmp;
}
tmp=tmp->next;
}
}
/* Bulunmazsa eklensin mi? */
if (create) {
/* TODO 2 */
struct key *tmp=malloc(sizeof(Key));
tmp->word=strdup(str);
tmp->next=table[n];
table[n]=tmp;
return tmp;
}
return NULL;
}
static int run_hash(mess_image *image,
void (*partialhash)(char *, const unsigned char *, unsigned long, unsigned int),
char *dest, unsigned int hash_functions)
{
UINT32 size;
UINT8 *buf = NULL;
*dest = '\0';
size = (UINT32) image_length(image);
buf = (UINT8 *) malloc(size);
if (!buf)
return FALSE;
/* read the file */
image_fseek(image, 0, SEEK_SET);
image_fread(image, buf, size);
if (partialhash)
partialhash(dest, buf, size, hash_functions);
else
hash_compute(dest, buf, size, hash_functions);
/* cleanup */
if (buf)
free(buf);
image_fseek(image, 0, SEEK_SET);
return TRUE;
}
static void identify_data(const char *name, const UINT8 *data, int length, romident_status *status)
{
char hash[HASH_BUF_SIZE];
UINT8 *tempjed = NULL;
astring *basename;
int found = 0;
jed_data jed;
/* if this is a '.jed' file, process it into raw bits first */
if (core_filename_ends_with(name, ".jed") && jed_parse(data, length, &jed) == JEDERR_NONE)
{
/* now determine the new data length and allocate temporary memory for it */
length = jedbin_output(&jed, NULL, 0);
tempjed = malloc(length);
if (tempjed == NULL)
return;
/* create a binary output of the JED data and use that instead */
jedbin_output(&jed, tempjed, length);
data = tempjed;
}
/* compute the hash of the data */
hash_data_clear(hash);
hash_compute(hash, data, length, HASH_SHA1 | HASH_CRC);
/* output the name */
status->total++;
basename = core_filename_extract_base(astring_alloc(), name, FALSE);
mame_printf_info("%-20s", astring_c(basename));
astring_free(basename);
/* see if we can find a match in the ROMs */
match_roms(hash, length, &found);
/* if we didn't find it, try to guess what it might be */
if (found == 0)
{
/* if not a power of 2, assume it is a non-ROM file */
if ((length & (length - 1)) != 0)
{
mame_printf_info("NOT A ROM\n");
status->nonroms++;
}
/* otherwise, it's just not a match */
else
mame_printf_info("NO MATCH\n");
}
/* if we did find it, count it as a match */
else
status->matches++;
/* free any temporary JED data */
if (tempjed != NULL)
free(tempjed);
}
