unit PhoneShare;

interface

uses
  SysUtils,Math;

type
  TPDUFormatRec = Record
    CenterLen:Array[0..1] of Char;                 //短信息中心地址長(zhǎng)度
    CenterType:Array[0..1] of Char;                //短信息中心號(hào)碼類型，91是TON/NPI
    CenterNumber:Array[0..13] of Char;             //所在地GSM短信息中心的號(hào)碼
    FileHeader:Array[0..1] of Char;                //指正常地發(fā)送短信息
    SMType:Array[0..1] of Char;                    //信息類型
    CalledLen:Array[0..1] of Char;                 //被叫號(hào)碼長(zhǎng)度
    CalledType:Array[0..1] of Char;                //被叫號(hào)碼類型
    CalledNumber:Array[0..11] of Char;             //被叫號(hào)碼
//    PID:Array[0..1] of Char;                       //
//    DCS:Array[0..1] of Char;                       //
//    TimeStamp:Array[0..13] of Char;                //
    SMCodeType:Array[0..5] of Char;                //短信息編碼類型GSM Default Alphabet，如為中文則是000010
    SMLen:Array[0..1] of Char;                     //短信息長(zhǎng)度
  end;

  TPDUSendRec = Record
    SMSCLength:Array[0..1] of Char;
    FirstOctet:Array[0..1] of Char;
    MessageReference:Array[0..1] of Char;
    PhoneLength:Array[0..1] of Char;
    AddressType:Array[0..1] of Char;
    Phone:Array[0..11] of Char;
    TPPID:Array[0..1] of Char;
    TPDCS:Array[0..1] of Char;
    TPValidityPeriod:Array[0..1] of Char;
    TPUserDataLength:Array[0..1] of Char;
    //TPUserData
  end;

  TPDUFirstReadRec = Record
    SMSCLength:Array[0..1] of Char;
    AddressType:Array[0..1] of Char;
    ServiceCenterNumber:Array[0..13] of Char;       //Length???
    FirstOctet:Array[0..1] of Char;

    SendPhoneLength:Array[0..1] of Char;
    SendPhoneType:Array[0..1] of Char;
//    TONNPI:Array[0..1] of Char;
    //Phone
  end;

  TPDUSecondReadRec = Record
    TPPID:Array[0..1] of Char;
    TPDCS:Array[0..1] of Char;
    TimeStamp:Array[0..13] of Char;
    TPUserDataLength:Array[0..1] of Char;
    //TPUserData
  end;

  function HexToInt(HexStr:String):Integer;
  function ChangeOrder(OriStr:String;TotalLen:Integer):String;
  function ResumeOrder(OriStr:String):String;

  function EncodeEnglish(s:String):String;
  function DecodeEnglish(s:String):String;

  function Encode8Bits(s:String):String;
  function Decode8Bits(s:String):String;

  function EncodeUniCode(s:WideString):String;
  function DecodeUniCode(s:String):WideString;

  Function Mix2PDU(CenterNumber,CalledNumber,ShortMsg:String):String;
  function MixSendPDU(Phone,ShortMsg:String;Var SendLen:String;SMType:Integer):String;
  function DisposeReadPDU(PDUData:String;Var Phone,MsgContent:String):Integer;

implementation

function ChangeOrder(OriStr:String;TotalLen:Integer):String;
var
  i:Integer;
  TempStr:String;
begin
  OriStr:=OriStr+Copy('FFFFFFFFFF',1,TotalLen-Length(OriStr));

  TempStr:='';
  for i:=1 to (TotalLen Div 2) do
    TempStr:=TempStr+OriStr[i*2]+OriStr[i*2-1];

  Result:=TempStr;
end;

function ResumeOrder(OriStr:String):String;
var
  i:Integer;
  TempStr:String;
begin
  TempStr:='';
  for i:=1 to (Length(OriStr) Div 2) do
    TempStr:=TempStr+OriStr[i*2]+OriStr[i*2-1];

  Result:=StringReplace(TempStr,'F','',[rfReplaceAll]);
end;

Function Mix2PDU(CenterNumber,CalledNumber,ShortMsg:String):String;
var
  TempStr,MsgContent:String;
  PDURec:TPDUFormatRec;
begin
  PDURec.CenterLen := '08';
  PDURec.CenterType := '91';
  TempStr := ChangeOrder(CenterNumber,14);
  Move(TempStr[1],PDURec.CenterNumber[0],14);

  PDURec.FileHeader := '11';
  PDURec.SMType := '00';
  PDURec.CalledLen := '0B';
  PDURec.CalledType := '81';

  TempStr := ChangeOrder(CalledNumber,12);
  Move(TempStr[1],PDURec.CalledNumber[0],12);

  PDURec.SMCodeType := '0000A7';


  MsgContent := EnCodeUniCode(ShortMsg);
  Move(IntToHex(Length(ShortMsg),2)[1],PDURec.SMLen[0],2);

  SetLength(Result,SizeOf(PDURec));
  Move(PDURec,Result[1],SizeOf(PDURec));
  Result:=Result+MsgContent;
end;

function EncodeUniCode(s:WideString):String;
var
  i,len:Integer;
  cur:Integer;
  t:String;
begin
  Result:='';
  len:=Length(s);
  i:=1;

  while i<=len do
  begin
    cur:=ord(s[i]);
    //BCD轉(zhuǎn)換

    //FmtStr(t,'%4.4X',[cur]);

    Result:=Result+IntToHex(Cur,4)+' ';
    inc(i);
  end;
end;

function DecodeUniCode(s:String):WideString;
var
  p:PWord;
  i,len:Integer;
  cur:Integer;
  TempChar:WideChar;
  t:String;
begin
  New(p);

  Result:='';
  len:=Length(s) div 4;
  i:=1;

  for i:=0 to Len-1 do
  begin
    t:=Copy(s,4*i+1,4);
    p^:=HexToInt(t);

    Move(p^,TempChar,2);
    Result:=Result+TempChar;
  end;

  Dispose(p);
end;

function MixSendPDU(Phone,ShortMsg:String;Var SendLen:String;SMType:Integer):String;
var
  PDUSendRec:TPDUSendRec;
  TempStr:String;
begin
  PDUSendRec.SMSCLength := '00';
  PDUSendRec.FirstOctet := '11';
  PDUSendRec.MessageReference := '00';
  PDUSendRec.PhoneLength := '0B';
  PDUSendRec.AddressType := '91';

  TempStr:=ChangeOrder(Phone,12);
  Move(TempStr[1],PDUSendRec.Phone[0],12);

  PDUSendRec.TPPID := '00';

  Case SMType of
    0://Englsih
      PDUSendRec.TPDCS := '00';
    4://8Bits
      PDUSendRec.TPDCS := '04';
    else //Chinese
      PDUSendRec.TPDCS := '08';
  end;

  PDUSendRec.TPValidityPeriod := 'AA';

  Case SMType of
    0://Englsih
    begin
      Move(IntToHex(Length(ShortMsg),2)[1],PDUSendRec.TPUserDataLength[0],2);
      SetLength(Result,SizeOf(PDUSendRec));
      Move(PDUSendRec,Result[1],SizeOf(PDUSendRec));
      Result:=Result+EncodeEnglish(ShorTMsg);
      SendLen:=IntToStr((Length(Result)-2) Div 2);
    end;

    4://8Bits
    begin
      Move(IntToHex(Length(ShortMsg),2)[1],PDUSendRec.TPUserDataLength[0],2);
      SetLength(Result,SizeOf(PDUSendRec));
      Move(PDUSendRec,Result[1],SizeOf(PDUSendRec));
      Result:=Result+Encode8Bits(ShorTMsg);
      SendLen:=IntToStr((Length(Result)-2) Div 2);
    end;

    else //Chinese
    begin
      //TempStr:=EnCodeUniCode(ShortMsg);
      TempStr:= ShortMsg;
      Move(IntToHex(Length(TempStr) Div 2,2)[1],PDUSendRec.TPUserDataLength[0],2);
      SetLength(Result,SizeOf(PDUSendRec));
      Move(PDUSendRec,Result[1],SizeOf(PDUSendRec));
      Result:=Result+TempStr;
      SendLen:=IntToStr((Length(Result)-2) Div 2);
    end;
  end;
end;

function EncodeEnglish(s:String):String;
var
  i,j,len:Integer;
  cur,Int1:Integer;
begin
  len:=Length(s);

  //j 用于移位計(jì)數(shù)
  i:=1;
  j:=0;

  while i<=len do
  begin
    if i<len then
      //數(shù)據(jù)變換
      cur:=(ord(s[i]) shr j) or ((ord(s[i+1]) shl (7-j)) and $ff)
    else
      cur:=(ord(s[i]) shr j) and $7f;

    Result:=Result+IntToHex(cur,2);
    inc(i);

    //移位計(jì)數(shù)達(dá)到7位的特別處理
    j:=(j+1) mod 7;
    if j=0 then inc(i);
  end;
end;

function DecodeEnglish(s:String):String;
var
  i,j,len:Integer;
  TempIntArray:Array of Integer;
  TempStr:String;
  cur,Int1:Integer;
begin
  len:=Length(s) div 2;
  SetLength(TempIntArray,Len);

  for i:=0 to Len-1 do
  begin
    TempStr:=Copy(s,i*2+1,2);
    TempIntArray[i]:=HexToInt(TempStr);
  end;

  //j 用于移位計(jì)數(shù)
  i:=0;
  j:=0;

  while i<=len-1 do
  begin
    if i<>0 then
      //數(shù)據(jù)變換
      cur:=((TempIntArray[i] shl j) and $7f) or (TempIntArray[i-1] shr (8-j))
    else
      cur:=(TempIntArray[i] shl j) and $7f;

    Result:=Result+Chr(cur);

    //移位計(jì)數(shù)達(dá)到7位的特別處理
    j:=(j+1) mod 7;
    if j=0 then
    begin
      cur:=TempIntArray[i] shr 1;
      Result:=Result+Chr(cur);
    end;

    inc(i);
  end;
end;

function DisposeReadPDU(PDUData:String;Var Phone,MsgContent:String):Integer;
var
  TempInt,Len:Integer;
  FirstReadRec:TPDUFirstReadRec;
  SecondReadRec:TPDUSecondReadRec;
  TempStr:String;
begin
  //First Read Record
  Move(PDUData[1],FirstReadRec,SizeOf(FirstReadRec));
  TempInt:=HexToInt(FirstReadRec.SendPhoneLength);
  if (TempInt mod 2 = 1) then
    Inc(TempInt);

  //Phone
  Phone:=Copy(PDUData,SizeOf(FirstReadRec)+1,TempInt);
  Phone:=ResumeOrder(Phone);

  //Second Read Record
  Move(PDUData[SizeOf(FirstReadRec)+TempInt+1],SecondReadRec,SizeOf(SecondReadRec));

  //Message Length
  Len:=HexToInt(SecondReadRec.TPUserDataLength)*2;

  //Short Message Content
  TempStr:=Copy(PDUData,SizeOf(FirstReadRec)+TempInt+SizeOf(SecondReadRec)+1,Len);

  Case HexToInt(SecondReadRec.TPDCS) of
    0..3://7 Bits
    begin
      MsgContent:=DecodeEnglish(TempStr);
    end;

    4..7://8 Bits
    begin
      MsgContent:=Decode8Bits(TempStr);
    end;

    8..11://UniCode
    begin
      MsgContent:=DecodeUniCode(TempStr);
    end;

    else
    begin
      Result:=1;          //type Error
      Exit;
    end;
  end;
end;

function HexToInt(HexStr:String):Integer;
var
  i,TempInt,LocalInt:Integer;
begin
  HexStr:=UpperCase(HexStr);

  LocalInt:=1;
  Result:=0;
  for i:=Length(HexStr) downto 1 do
  begin
    if HexStr[i] in ['0'..'9'] then
      TempInt:=StrToInt(HexStr[i])
    else
      TempInt:=Ord(HexStr[i])-Ord('A')+10;

    if i=Length(HexStr) then
      LocalInt:=1
    else
      LocalInt:=LocalInt*16;

    Result:=Result+TempInt*LocalInt;
  end;
end;

function Encode8Bits(s:String):String;
var
  i:Integer;
begin
  Result:='';
  for i:=1 to Length(s) do
    Result:=Result+IntToHex(Ord(s[i]),2);
end;

function Decode8Bits(s:String):String;
var
  i,Len:Integer;
  TempStr:String;
begin
  Result:='';
  Len:=Length(s) Div 2;

  for i:=0 to Len-1 do
  begin
    TempStr:=Copy(s,i*2+1,2);

    Result:=Result+Chr(HexToInt(TempStr));
  end;
end;

end.