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{
This file is part of the Free Component Library (FCL)
Copyright (c) 1999-2000 by Michael Van Canneyt and Florian Klaempfl
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
**********************************************************************}
procedure BinToHex(BinValue, HexValue: PChar; BinBufSize: Integer);
Const
HexDigits='0123456789ABCDEF';
var
i : longint;
begin
for i:=0 to binbufsize-1 do
begin
HexValue[0]:=hexdigits[1+((ord(binvalue^) shr 4))];
HexValue[1]:=hexdigits[1+((ord(binvalue^) and 15))];
inc(hexvalue,2);
inc(binvalue);
end;
end;
function HexToBin(HexValue, BinValue: PChar; BinBufSize: Integer): Integer;
// more complex, have to accept more than bintohex
// A..F 1000001
// a..f 1100001
// 0..9 110000
var i,j,h,l : integer;
begin
i:=binbufsize;
while (i>0) do
begin
if hexvalue^ IN ['A'..'F','a'..'f'] then
h:=((ord(hexvalue^)+9) and 15)
else if hexvalue^ IN ['0'..'9'] then
h:=((ord(hexvalue^)) and 15)
else
break;
inc(hexvalue);
if hexvalue^ IN ['A'..'F','a'..'f'] then
l:=(ord(hexvalue^)+9) and 15
else if hexvalue^ IN ['0'..'9'] then
l:=(ord(hexvalue^)) and 15
else
break;
j := l + (h shl 4);
inc(hexvalue);
binvalue^:=chr(j);
inc(binvalue);
dec(i);
end;
result:=binbufsize-i;
end;
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