function HexToBits(C: Char): Byte;
begin
case C of
'0'..'9': Result := Byte(Ord(C) - Ord('0'));
'a'..'f': Result := Byte(10 + (Ord(C) - Ord('a')));
'A'..'F': Result := Byte(10 + (Ord(C) - Ord('A')));
else
raise Exception.Create('Invalid encoding detected');
end;
end;
var
sURL: String;
sWork: UTF8String;
C: Char;
B: Byte;
wDecoded: WideString;
I: Integer;
begin
sURL := 'ga:referralPath=/add/%D0%9F%D0%B8%D0%B6%D0%B0%D0%BC';
sWork := sURL;
I := 1;
while I <= Length(sWork) do
begin
if sWork[I] = '%' then
begin
if (I+2) > Length(sWork) then
raise Exception.Create('Incomplete encoding detected');
sWork[I] := Char((HexToBits(sWork[I+1]) shl 4) or HexToBits(sWork[I+2]));
Delete(sWork, I+1, 2);
end;
Inc(I);
end;
wDecoded := UTF8Decode(sWork);
...
end;
function HexToBits(C: Char): Byte;
begin
case C of
'0'..'9': Result := Byte(Ord(C) - Ord('0'));
'a'..'f': Result := Byte(10 + (Ord(C) - Ord('a')));
'A'..'F': Result := Byte(10 + (Ord(C) - Ord('A')));
else
raise Exception.Create('Invalid encoding detected');
end;
end;
var
sURL: String;
sWork: UTF8String;
C: Char;
B: Byte;
wDecoded: WideString;
I: Integer;
begin
sURL := 'ga:referralPath=/add/%D0%9F%D0%B8%D0%B6%D0%B0%D0%BC';
sWork := sURL;
I := 1;
while I <= Length(sWork) do
begin
if sWork[I] = '%' then
begin
if (I+2) > Length(sWork) then
raise Exception.Create('Incomplete encoding detected');
sWork[I] := Char((HexToBits(sWork[I+1]) shl 4) or HexToBits(sWork[I+2]));
Delete(sWork, I+1, 2);
end;
Inc(I);
end;
wDecoded := UTF8Decode(sWork);
...
end;