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CREATE OR REPLACE PROCEDURE dec2hex (in_num IN NUMBER, out_hex OUT VARCHAR2)
IS
TYPE vc2tab_type IS TABLE OF VARCHAR2(1)
INDEX BY BINARY_INTEGER;
hextab vc2tab_type;
v_num NUMBER;
v_hex VARCHAR2(200);
/*
Author: Jonas Nordstrom
*/
BEGIN
IF in_num IS NULL THEN RETURN NULL; END IF;
hextab (0) := '0';
hextab (1) := '1';
hextab (2) := '2';
hextab (3) := '3';
hextab (4) := '4';
hextab (5) := '5';
hextab (6) := '6';
hextab (7) := '7';
hextab (8) := '8';
hextab (9) := '9';
hextab (10) := 'A';
hextab (11) := 'B';
hextab (12) := 'C';
hextab (13) := 'D';
hextab (14) := 'E';
hextab (15) := 'F';
v_num := in_num;
WHILE v_num >= 16
LOOP
v_hex := hextab (MOD (v_num, 16)) || v_hex;
v_num := TRUNC (v_num / 16);
END LOOP;
v_hex := hextab (MOD (v_num, 16)) || v_hex;
out_hex := v_hex;
END; -- dec2hex
/
CREATE OR REPLACE FUNCTION hextointeger (h VARCHAR2)
RETURN PLS_INTEGER
IS
BEGIN
IF NVL (LENGTH (h), 1) = 1
THEN
RETURN INSTR ('0123456789ABCDEF', h) - 1;
ELSE
RETURN 16 * hextointeger (SUBSTR (h, 1, LENGTH (h) - 1)) +
INSTR ('0123456789ABCDEF', SUBSTR (h, -1)) -
1;
END IF;
END hextointeger;
/
CREATE OR REPLACE FUNCTION integertohex (n pls_integer)
RETURN VARCHAR2
IS
BEGIN
IF n > 0
THEN
RETURN integertohex (TRUNC (n / 16)) ||
SUBSTR ('0123456789ABCDEF', MOD (n, 16) + 1, 1);
ELSE
RETURN NULL;
END IF;
END integertohex;
/
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