Delphi的unicode与GB2312转转换, 汉字unicode转GB2312

Delphi的unicode与GB2312转转换, 汉字unicode转GB2312
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{ 函数 : RESULTSTRING = HexToBin(HEXSTRING)
{ 目的 : 把十六进制字符串转换为二进制字符串
{
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{ 函数 : RESULTINTEGER = HexCharToInt(HEXCHAR)
{ 目的 : 转换一个十六进制字符为整数
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{ 函数 : RESULTSTRING = HexCharToBin(HEXCHAR)
{ 目的 : 转换一个十六进制字符为二进制字符串
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{ 函数 : RESULTINTEGER = Pow(BASE,POWER)
{ 目的 : 指数函数
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{ 函数 : RESULTINTEGER = BinStrToInt(BINSTRING)
{ 目的 : 把二进制字符串转换为整数
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{ 函数 : RESULTSTRING = DecodeSMS7Bit (PDUSTRING)
{ 目的 : 解码一个7-bit SMS (GSM 03.38) 为ASCII码
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{ 函数 : RESULTSTRING = ReverseStr (SOURCESTRING)
{ 目的 : 反转一个字符串
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{ 函数 : RESULTSTRING = UniCode2Gb (SOURCESTRING)
{ 目的 : 将UniCode字符串转换为GB
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{ 函数 : RESULTSTRING = GB2UniCode (SOURCESTRING)
{ 目的 : 将GB字符串转换为UniCode
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unit BinHexTools;
interface
function HexToBin(HexNr: string): string;
function HexCharToInt(HexToken: char): Integer;
function HexCharToBin(HexToken: char): string;
function pow(base, power: integer): integer;
function BinStrToInt(BinStr: string): Integer;
function DecodeSMS7Bit(PDU: string): string;
function ReverseStr(SourceStr: string): string;
function GB2UniCode(GB: string): string;
function UniCode2GB(S: string): string;
implementation
uses sysutils, dialogs;
function HexCharToInt(HexToken: char): Integer;
begin
//if HexToken>#97 then HexToken:=Chr(Ord(HexToken)-32);
{ 将小写字母转换成大写 }
  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;
function HexCharToBin(HexToken: char): string;
var DivLeft: integer;
begin
  DivLeft := HexCharToInt(HexToken); { first HexChar->Int }
  Result := '';
{ Use reverse dividing }
  repeat { Trick; divide by 2 }
    if Odd(DivLeft) then { result = odd ? then bit = 1 }
      Result := '1' + Result { result = even ? then bit = 0 }
    else
      Result := '0' + Result;
    DivLeft := DivLeft div 2; { keep dividing till 0 left and length = 4 }
  until (DivLeft = 0) and (length(Result) = 4); { 1 token = nibble = 4 bits }
end;
function HexToBin(HexNr: string): string;
{ only stringsize is limit of binnr }
var Counter: integer;
begin
  Result := '';
  for Counter := 1 to length(HexNr) do
    Result := Result + HexCharToBin(HexNr[Counter]);
end;
function pow(base, power: integer): integer; //指数base^power
var counter: integer;
begin
  Result := 1;
  for counter := 1 to power do
    Result := Result * base;
end;
function BinStrToInt(BinStr: string): integer;
var counter: integer;
begin
  if length(BinStr) > 16 then
    raise ERangeError.Create(#13 + BinStr + #13 +
      '不是一个有效的16Bit二进制单元' + #13);
  Result := 0;
  for counter := 1 to length(BinStr) do
    if BinStr[Counter] = '1' then
      Result := Result + pow(2, length(BinStr) - counter);
end;
function DecodeSMS7Bit(PDU: string): string;
var OctetStr: string;
  OctetBin: string;
  Charbin: string;
  PrevOctet: string;
  Counter: integer;
  Counter2: integer;
begin
  PrevOctet := '';
  Result := '';
  for Counter := 1 to length(PDU) do
  begin
    if length(PrevOctet) >= 7 then { if 7 Bit overflow on previous }
    begin
      if BinStrToInt(PrevOctet) <> 0 then
        Result := Result + Chr(BinStrToInt(PrevOctet))
      else Result := Result + ' ';
      PrevOctet := '';
    end;
    if Odd(Counter) then { only take two nibbles at a time }
    begin
      OctetStr := Copy(PDU, Counter, 2);
      OctetBin := HexToBin(OctetStr);
      Charbin := '';
      for Counter2 := 1 to length(PrevOctet) do
        Charbin := Charbin + PrevOctet[Counter2];
      for Counter2 := 1 to 7 - length(PrevOctet) do
        Charbin := OctetBin[8 - Counter2 + 1] + Charbin;
      if BinStrToInt(Charbin) <> 0 then Result := Result + Chr(BinStrToInt(CharBin))
      else Result := Result + ' ';
      PrevOctet := Copy(OctetBin, 1, length(PrevOctet) + 1);
    end;
  end;
end;
function ReverseStr(SourceStr: string): string;
var Counter: integer;
begin
  Result := '';
  for Counter := 1 to length(SourceStr) do
    Result := SourceStr[Counter] + Result;
end;
function GB2UniCode(GB: string): string;
var
  s: string;
  i, j, k: integer;
  a: array[1..160] of char;
begin
  s := '';
  StringToWideChar(GB, @(a[1]), 500);
  i := 1;
  while ((a[i] <> #0) or (a[i + 1] <> #0)) do begin
    j := Integer(a[i]);
    k := Integer(a[i + 1]);
    s := s + Copy(Format('%X ', [k * $100 + j + $10000]), 2, 4);
//S := S + Char(k)+Char(j);
    i := i + 2;
  end;
  Result := s;
end;
function UniCode2GB(S: string): string;
var I: Integer;
begin
  I := Length(S);
  while I >= 4 do begin
    try
      Result := WideChar(StrToInt('$' + S[I - 3] + S[I - 2] + S[I - 1] + S[I])) + Result;
    except end;
    I := I - 4;
  end;
end;
end.