73 lines
1.7 KiB
Modula-2
73 lines
1.7 KiB
Modula-2
(*
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(c) copyright 1988 by the Vrije Universiteit, Amsterdam, The Netherlands.
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See the copyright notice in the ACK home directory, in the file "Copyright".
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*)
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(*$R-*)
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IMPLEMENTATION MODULE Conversions;
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(*
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Module: numeric-to-string conversions
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Author: Ceriel J.H. Jacobs
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Version: $Header$
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*)
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PROCEDURE ConvertNum(num, len, base: CARDINAL;
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neg: BOOLEAN;
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VAR str: ARRAY OF CHAR);
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VAR i: CARDINAL;
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r: CARDINAL;
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tmp: ARRAY [0..20] OF CHAR;
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BEGIN
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i := 0;
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REPEAT
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r := num MOD base;
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num := num DIV base;
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IF r <= 9 THEN
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tmp[i] := CHR(r + ORD('0'));
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ELSE
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tmp[i] := CHR(r - 10 + ORD('A'));
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END;
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INC(i);
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UNTIL num = 0;
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IF neg THEN
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tmp[i] := '-';
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INC(i)
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END;
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IF len > HIGH(str) + 1 THEN len := HIGH(str) + 1; END;
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IF i > HIGH(str) + 1 THEN i := HIGH(str) + 1; END;
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r := 0;
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WHILE len > i DO str[r] := ' '; INC(r); DEC(len); END;
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WHILE i > 0 DO str[r] := tmp[i-1]; DEC(i); INC(r); END;
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WHILE r <= HIGH(str) DO
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str[r] := 0C;
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INC(r);
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END;
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END ConvertNum;
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PROCEDURE ConvertOctal(num, len: CARDINAL; VAR str: ARRAY OF CHAR);
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BEGIN
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ConvertNum(num, len, 8, FALSE, str);
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END ConvertOctal;
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PROCEDURE ConvertHex(num, len: CARDINAL; VAR str: ARRAY OF CHAR);
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BEGIN
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ConvertNum(num, len, 16, FALSE, str);
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END ConvertHex;
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PROCEDURE ConvertCardinal(num, len: CARDINAL; VAR str: ARRAY OF CHAR);
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BEGIN
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ConvertNum(num, len, 10, FALSE, str);
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END ConvertCardinal;
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PROCEDURE ConvertInteger(num: INTEGER;
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len: CARDINAL;
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VAR str: ARRAY OF CHAR);
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BEGIN
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IF (num < 0) AND (num >= -MAX(INTEGER)) THEN
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ConvertNum(-num, len, 10, TRUE, str);
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ELSE
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ConvertNum(CARDINAL(num), len, 10, num < 0, str);
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END;
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END ConvertInteger;
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END Conversions.
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