void *
__go_map_index (struct __go_map *map, const void *key, _Bool insert)
{
const struct __go_map_descriptor *descriptor;
const struct __go_type_descriptor *key_descriptor;
uintptr_t key_offset;
_Bool (*equalfn) (const void*, const void*, uintptr_t);
size_t key_hash;
size_t key_size;
size_t bucket_index;
char *entry;
if (map == NULL)
{
if (insert)
runtime_panicstring ("assignment to entry in nil map");
return NULL;
}
descriptor = map->__descriptor;
key_descriptor = descriptor->__map_descriptor->__key_type;
key_offset = descriptor->__key_offset;
key_size = key_descriptor->__size;
__go_assert (key_size != 0 && key_size != -1UL);
equalfn = key_descriptor->__equalfn;
key_hash = key_descriptor->__hashfn (key, key_size);
bucket_index = key_hash % map->__bucket_count;
entry = (char *) map->__buckets[bucket_index];
while (entry != NULL)
{
if (equalfn (key, entry + key_offset, key_size))
return entry + descriptor->__val_offset;
entry = *(char **) entry;
}
if (!insert)
return NULL;
if (map->__element_count >= map->__bucket_count)
{
__go_map_rehash (map);
bucket_index = key_hash % map->__bucket_count;
}
entry = (char *) __go_alloc (descriptor->__entry_size);
__builtin_memset (entry, 0, descriptor->__entry_size);
__builtin_memcpy (entry + key_offset, key, key_size);
*(char **) entry = map->__buckets[bucket_index];
map->__buckets[bucket_index] = entry;
map->__element_count += 1;
return entry + descriptor->__val_offset;
}
void
__go_map_delete (struct __go_map *map, const void *key)
{
const struct __go_map_descriptor *descriptor;
const struct __go_type_descriptor *key_descriptor;
uintptr_t key_offset;
_Bool (*equalfn) (const void*, const void*, uintptr_t);
size_t key_hash;
size_t key_size;
size_t bucket_index;
void **pentry;
if (map == NULL)
runtime_panicstring ("deletion of entry in nil map");
descriptor = map->__descriptor;
key_descriptor = descriptor->__map_descriptor->__key_type;
key_offset = descriptor->__key_offset;
key_size = key_descriptor->__size;
__go_assert (key_size != 0 && key_size != -1UL);
equalfn = key_descriptor->__equalfn;
key_hash = key_descriptor->__hashfn (key, key_size);
bucket_index = key_hash % map->__bucket_count;
pentry = map->__buckets + bucket_index;
while (*pentry != NULL)
{
char *entry = (char *) *pentry;
if (equalfn (key, entry + key_offset, key_size))
{
*pentry = *(void **) entry;
__go_free (entry);
map->__element_count -= 1;
break;
}
pentry = (void **) entry;
}
}
int main ()
{
T x = gx, y = gy;
return equalfn (&x, &y);
}
