C++ (Cpp) PG_RETURN_UUID_Pの例

コード例 #1

Datum
uuid_in(PG_FUNCTION_ARGS)
{
    char	   *uuid_str = PG_GETARG_CSTRING(0);
    pg_uuid_t  *uuid;

    uuid = (pg_uuid_t *) palloc(sizeof(*uuid));
    string_to_uuid(uuid_str, uuid);
    PG_RETURN_UUID_P(uuid);
}

コード例 #2

ファイル: pgcrypto.c プロジェクト: dreamsxin/postgresql-1

Datum
pg_random_uuid(PG_FUNCTION_ARGS)
{
	uint8	   *buf = (uint8 *) palloc(UUID_LEN);

	/*
	 * Generate random bits. pg_backend_random() will do here, we don't
	 * promis UUIDs to be cryptographically random, when built with
	 * --disable-strong-random.
	 */
	if (!pg_backend_random((char *) buf, UUID_LEN))
		px_THROW_ERROR(PXE_NO_RANDOM);

	/*
	 * Set magic numbers for a "version 4" (pseudorandom) UUID, see
	 * http://tools.ietf.org/html/rfc4122#section-4.4
	 */
	buf[6] = (buf[6] & 0x0f) | 0x40;	/* "version" field */
	buf[8] = (buf[8] & 0x3f) | 0x80;	/* "variant" field */

	PG_RETURN_UUID_P((pg_uuid_t *) buf);
}