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Anybody, can help me calculate the LRC and VRC for strings in Delphi Programming

Posted on 2009-05-11
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Last Modified: 2012-05-06
I want to find the delphi code to solve the LRC and VRC method for strings

Thanks
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Question by:Polors
5 Comments
 
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Expert Comment

by:wd123
ID: 24359118
i think something like this
function LRC(s:string):char;
var i:integer;
    res:char;
begin
res:=#0;
for I:=1 to length(s) do res:=chr(ord(res) xor ord(s[i]));
result:=res;
end;

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Expert Comment

by:EddieShipman
ID: 24365493
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Author Comment

by:Polors
ID: 24365986
I reviewed the link, I think that is the solution to CRC16 and CR32 algorithm, but the functions LRC and VRC works with only that code?
Thanks !!!
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Accepted Solution

by:
Russell Libby earned 50 total points
ID: 24368415
Non assembler versions. (both are trivial routines).

function Vrc(S: String): Byte;
var  i:             Integer;
begin

  // Default result
  result:=0;

  // Walk the string
  for i:=1 to Length(S) do
  begin
     Inc(result, Ord(S[i]));
  end;

end;

function Lrc(S: String): Byte;
var  i:             Integer;
begin

  // Default result
  result:=0;

  // Walk the string
  for i:=1 to Length(S) do
  begin
     result:=result xor Ord(S[i]);
  end;

end;
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Author Closing Comment

by:Polors
ID: 31580293
Thanks for all, the solution works.
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