Created
November 5, 2024 05:02
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MySQL bitwise operations on hex and binary data
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| DELIMITER $$ | |
| DROP FUNCTION IF EXISTS hex_or_hex; | |
| CREATE FUNCTION IF NOT EXISTS hex_or_hex ( | |
| h1 TEXT, | |
| h2 TEXT | |
| ) | |
| RETURNS TEXT | |
| COMMENT 'Perform a bitwise OR operation between two hex values' | |
| DETERMINISTIC | |
| BEGIN | |
| DECLARE h CHAR(16) DEFAULT '0123456789ABCDEF'; | |
| DECLARE t TEXT | |
| DEFAULT '0123456789ABCDEF1133557799BBDDFF23236767ABABEFEF33337777BBBBFFFF45674567CDEFCDEF55775577DDFFDDFF67676767EFEFEFEF77777777FFFFFFFF89ABCDEF89ABCDEF99BBDDFF99BBDDFFABABEFEFABABEFEFBBBBFFFFBBBBFFFFCDEFCDEFCDEFCDEFDDFFDDFFDDFFDDFFEFEFEFEFEFEFEFEFFFFFFFFFFFFFFFFF'; | |
| DECLARE c INTEGER DEFAULT 1; | |
| DECLARE r TEXT DEFAULT ''; | |
| IF LENGTH(h1) > LENGTH(h2) THEN | |
| SET h2 = LPAD(h2, LENGTH(h1), '0'); | |
| ELSEIF LENGTH(h2) > LENGTH(h1) THEN | |
| SET h1 = LPAD(h1, LENGTH(h2), '0'); | |
| END IF; | |
| REPEAT | |
| SET r = CONCAT( | |
| r, | |
| SUBSTR( | |
| t, | |
| ((POSITION(SUBSTR(h1, c, 1) IN h) - 1) * 16) + POSITION(SUBSTR(h2, c, 1) IN h), | |
| 1 | |
| ) | |
| ); | |
| SET c = c + 1; | |
| UNTIL c > LENGTH(h1) | |
| END REPEAT; | |
| RETURN r; | |
| END; | |
| $$ | |
| DELIMITER ; | |
| DELIMITER $$ | |
| DROP FUNCTION IF EXISTS hex_and_hex; | |
| CREATE FUNCTION IF NOT EXISTS hex_and_hex ( | |
| h1 TEXT, | |
| h2 TEXT | |
| ) | |
| RETURNS TEXT | |
| COMMENT 'Perform a bitwise AND operation between two hex values' | |
| DETERMINISTIC | |
| BEGIN | |
| DECLARE h CHAR(16) DEFAULT '0123456789ABCDEF'; | |
| DECLARE t TEXT | |
| DEFAULT '00000000000000000101010101010101002200220022002201230123012301230000444400004444010145450101454500224466002244660123456701234567000000008888888801010101898989890022002288AA88AA0123012389AB89AB000044448888CCCC010145458989CDCD0022446688AACCEE0123456789ABCDEF'; | |
| DECLARE c INTEGER DEFAULT 1; | |
| DECLARE r TEXT DEFAULT ''; | |
| IF LENGTH(h1) > LENGTH(h2) THEN | |
| SET h2 = LPAD(h2, LENGTH(h1), '0'); | |
| ELSEIF LENGTH(h2) > LENGTH(h1) THEN | |
| SET h1 = LPAD(h1, LENGTH(h2), '0'); | |
| END IF; | |
| REPEAT | |
| SET r = CONCAT( | |
| r, | |
| SUBSTR( | |
| t, | |
| ((POSITION(SUBSTR(h1, c, 1) IN h) - 1) * 16) + POSITION(SUBSTR(h2, c, 1) IN h), | |
| 1 | |
| ) | |
| ); | |
| SET c = c + 1; | |
| UNTIL c > LENGTH(h1) | |
| END REPEAT; | |
| RETURN r; | |
| END; | |
| $$ | |
| DELIMITER ; | |
| DELIMITER $$ | |
| DROP FUNCTION IF EXISTS hex_xor_hex; | |
| CREATE FUNCTION IF NOT EXISTS hex_xor_hex ( | |
| h1 TEXT, | |
| h2 TEXT | |
| ) | |
| RETURNS TEXT | |
| COMMENT 'Perform a bitwise XOR operation between two hex values' | |
| DETERMINISTIC | |
| BEGIN | |
| DECLARE h CHAR(16) DEFAULT '0123456789ABCDEF'; | |
| DECLARE t TEXT | |
| DEFAULT '0123456789ABCDEF1032547698BADCFE23016745AB89EFCD32107654BA98FEDC45670123CDEF89AB54761032DCFE98BA67452301EFCDAB8976543210FEDCBA9889ABCDEF0123456798BADCFE10325476AB89EFCD23016745BA98FEDC32107654CDEF89AB45670123DCFE98BA54761032EFCDAB8967452301FEDCBA9876543210'; | |
| DECLARE c INTEGER DEFAULT 1; | |
| DECLARE r TEXT DEFAULT ''; | |
| IF LENGTH(h1) > LENGTH(h2) THEN | |
| SET h2 = LPAD(h2, LENGTH(h1), '0'); | |
| ELSEIF LENGTH(h2) > LENGTH(h1) THEN | |
| SET h1 = LPAD(h1, LENGTH(h2), '0'); | |
| END IF; | |
| REPEAT | |
| SET r = CONCAT( | |
| r, | |
| SUBSTR( | |
| t, | |
| ((POSITION(SUBSTR(h1, c, 1) IN h) - 1) * 16) + POSITION(SUBSTR(h2, c, 1) IN h), | |
| 1 | |
| ) | |
| ); | |
| SET c = c + 1; | |
| UNTIL c > LENGTH(h1) | |
| END REPEAT; | |
| RETURN r; | |
| END; | |
| $$ | |
| DELIMITER ; |
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