I have hex strings '00001A7000000000' ... '00001A700000012D'
how to convert each of them to unique integer
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Try this one:
function HexToInt2(s: string): Int64;
var
b: Byte;
c: Char;
begin
Result := 0;
s := UpperCase(s);
for b := 1 to Length(s) do
begin
Result := Result * 16;
c := s[b];
case c of
'0'..'9': Inc(Result, Ord(c) - Ord('0'));
'A'..'F': Inc(Result, Ord(c) - Ord('A') + 10);
else
raise EConvertError.Create('No Hex-Number');
end;
end;
end;
The function is StrToInt64, available in the SysUtils unit. You just have to prefix the string by $ pr 0x to tell this function the string you pass is hexa...
Ok for the alternative solution, but IMHO, when something is already available, you should bother recoding your own, except for a very good reason...
Business Accounts
Answer for Membership
by: GreybirdPosted on 2005-07-05 at 12:56:09ID: 14372518
You should try :
function hexaToInt(s : string) : Int64;
begin
if (s <> '') and (s[1] <> '$') then
result := strToInt64('$' + s)
else
result := strToInt64(s);
end;