ObjFW  Diff

- (void)updateWithBuffer: (const char*)buffer_
		  length: (size_t)length
{
	if (length == 0)
		return;

	if (isCalculated)
		@throw [OFHashAlreadyCalculatedException newWithClass: isa
								 hash: self];

	sha1_update(state, &count, buffer, buffer_, length);
}

- (uint8_t*)digest
{
	size_t i;
	char   finalcount[8];

	if (isCalculated)
		return digest;

	for (i = 0; i < 8; i++)
		/* Endian independent */
		finalcount[i] = (char)((count >> ((7 - (i & 7)) * 8)) & 255);
	sha1_update(state, &count, buffer, "\200", 1);

	while ((count & 504) != 448)
		sha1_update(state, &count, buffer, "\0", 1);
	/* Should cause a sha1_transform() */
	sha1_update(state, &count, buffer, finalcount, 8);

	for (i = 0; i < OF_SHA1_DIGEST_SIZE; i++)
		digest[i] = (char)((state[i >> 2] >>
		    ((3 - (i & 3)) * 8)) & 255);

	isCalculated = YES;

	return digest;
}
@end