home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
PC World Komputer 1995 November
/
PCWK1195.iso
/
inne
/
podstawy
/
dos
/
format
/
fdform18.exe
/
BASECONV.PAS
< prev
next >
Wrap
Pascal/Delphi Source File
|
1991-07-21
|
2KB
|
98 lines
{BASE Convert Unit for Turbo-Pascal 5.5}
{Copyright (c) 1989 Christoph H. Hochstätter}
{$A+,B-,D+,F-,I-,L+,R-,S-,V-}
UNIT baseconv;
INTERFACE
TYPE basestr = String[32];
VAR BaseError: Byte;
FUNCTION base(x:LongInt;b:Byte):basestr; {Convert x to base b}
FUNCTION basef(x:LongInt;b,f:Byte):basestr; {Convert x to base b length f}
FUNCTION hex(x:LongInt):basestr; {Convert x to base 16}
FUNCTION hexf(x:LongInt;f:Byte):basestr; {Convert x to base 16 length f}
FUNCTION dez(x:basestr;s:Byte):LongInt; {Convert x from Base s to decimal}
FUNCTION dezh(x:basestr):LongInt; {Convert hexadecimal x to decimal}
IMPLEMENTATION
VAR o: basestr;
CONST h: String[36] = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
VAR i: Byte;
CONST n: String[31] = '0000000000000000000000000000000';
FUNCTION base;
PROCEDURE base1(x: LongInt);
BEGIN
IF x>Pred(b) THEN base1(x DIV b);
o:=o+h[Succ(x MOD b)];
END;
BEGIN {base}
IF b>36 THEN BEGIN
BaseError:=1;
Exit;
END ELSE
BaseError:=0;
IF x<0 THEN
o:='-'
ELSE
o[0]:=Chr(0);
base1(Abs(x));
base:=o;
END;
FUNCTION hex;
BEGIN
hex:=base(x,16);
END;
FUNCTION basef;
BEGIN
o:=base(x,b);
IF BaseError <> 0 THEN Exit;
IF Ord(o[0])>f THEN
BaseError:=2
ELSE BEGIN
n[0]:=Chr(f-Ord(o[0]));
IF x<0 THEN i:=2 ELSE i:=1;
Insert(n,o,i);
END;
basef:=o;
END;
FUNCTION hexf;
BEGIN
hexf:=basef(x,16,f);
END;
FUNCTION dez;
VAR a: Byte;
b,c: LongInt;
BEGIN
BaseError:=0;
c:=1;
b:=0;
FOR i:=Length(x) DOWNTO 1 DO
IF BaseError=0 THEN BEGIN
a:=Pred(pos(Upcase(x[i]),h));
IF (a=255) OR (a>=s) THEN BaseError:=1;
b:=b+c*a;
c:=s*c;
END;
dez:=b;
END;
FUNCTION dezh;
BEGIN
dezh:=dez(x,16);
END;
END.