Delphi 实现16进制转字符串及字符串(中文)转16进制

//-----------------------------------------------
//16进制字符转整数,16进制字符与字符串转换中间函数
//-----------------------------------------------
function HexToInt(hex: string): integer;
var
  i: integer;
  function Ncf(num, f: integer): integer;
  var
    i: integer;
  begin
    Result := 1;
    if f = 0 then exit;
    for i := 1 to f do
      result := result * num;
  end;
  function HexCharToInt(HexToken: char): integer;
  begin
    if HexToken > #97 then
      HexToken := Chr(Ord(HexToken) - 32);
      Result := 0;
    if (HexToken > #47) and (HexToken < #58) then { chars 0....9 }
      Result := Ord(HexToken) - 48
    else if (HexToken > #64) and (HexToken < #71) then { chars A....F }
      Result := Ord(HexToken) - 65 + 10;
  end;
begin
  result := 0;
    hex := ansiuppercase(trim(hex));
  if hex = '' then
    exit;
  for i := 1 to length(hex) do
  result := result + HexCharToInt(hex[i]) * ncf(16, length(hex) - i);
end;
 
 
 
//-----------------------------------------------
//字符串转16进制字符
//-----------------------------------------------
function StringToHex(str: string): string;
var
   i : integer;
   s : string;
begin
   for i:=1 to length(str) do begin
       s := s + InttoHex(Integer(str[i]),2);
   end;
   Result:=s;
end;
 
 
 
//-----------------------------------------------
//16进制字符转字符串 
//-----------------------------------------------
function hextostring(str: string): string;
var
  s,t:string;
  i,j:integer;
  p:pchar;
begin
   s:='';
   i:=1;
   while i< length(str) do begin
      t:=str[i]+str[i+1];
      s:=s+chr(hextoint(t));
      i:=i+2;
   end;
   result:=s;
end;