if (Count = 1) and (Get(0) = '') then
    Result := WideString(QuoteChar) + QuoteChar
  else
  begin
    Result := '';
    for I := 0 to Count - 1 do
    begin
      S := Get(I);
      P := PWideChar(S);
      while not ((P^ in [WideChar(#0)..WideChar(' ')]) or (P^ = QuoteChar) or (P^ = Delimiter)) do
        Inc(P);
      if (P^ <> #0) then S := WideQuotedStr(S, QuoteChar);
      Result := Result + S + Delimiter;
    end;
    System.Delete(Result, Length(Result), 1);
  end;
end;

function TWideStrings.GetName(Index: Integer): WideString;
begin
  Result := ExtractName(Get(Index));
end;

function TWideStrings.GetObject(Index: Integer): TObject;
begin
  Result := nil;
end;

function TWideStrings.GetEnumerator: TWideStringsEnumerator;
begin
  Result := TWideStringsEnumerator.Create(Self);
end;

function TWideStrings.GetTextW: PWideChar;
begin
  Result := WStrNew(PWideChar(GetTextStr));
end;

function TWideStrings.GetTextStr: WideString;
var
  I, L, Size, Count: Integer;
  P: PWideChar;
  S, LB: WideString;
begin
  Count := GetCount;
  Size := 0;
  LB := sLineBreak;
  for I := 0 to Count - 1 do Inc(Size, Length(Get(I)) + Length(LB));
  SetString(Result, nil, Size);
  P := Pointer(Result);
  for I := 0 to Count - 1 do
  begin
    S := Get(I);
    L := Length(S);
    if L <> 0 then
    begin
      System.Move(Pointer(S)^, P^, L * SizeOf(WideChar));
      Inc(P, L);
    end;
    L := Length(LB);
    if L <> 0 then
    begin
      System.Move(Pointer(LB)^, P^, L * SizeOf(WideChar));
      Inc(P, L);
    end;
  end;
end;

function TWideStrings.GetValue(const Name: WideString): WideString;
var
  I: Integer;
begin
  I := IndexOfName(Name);
  if I >= 0 then
    Result := Copy(Get(I), Length(Name) + 2, MaxInt) else
    Result := '';
end;

function TWideStrings.IndexOf(const S: WideString): Integer;
begin
  for Result := 0 to GetCount - 1 do
    if CompareStrings(Get(Result), S) = 0 then Exit;
  Result := -1;
end;

function TWideStrings.IndexOfName(const Name: WideString): Integer;
var
  P: Integer;
  S: WideString;
begin
  for Result := 0 to GetCount - 1 do
  begin
    S := Get(Result);
    P := Pos(NameValueSeparator, S);
    if (P <> 0) and (CompareStrings(Copy(S, 1, P - 1), Name) = 0) then Exit;
  end;
  Result := -1;
end;

function TWideStrings.IndexOfObject(AObject: TObject): Integer;
begin
  for Result := 0 to GetCount - 1 do
    if GetObject(Result) = AObject then Exit;
  Result := -1;
end;

procedure TWideStrings.InsertObject(Index: Integer; const S: WideString;
  AObject: TObject);
begin
  Insert(Index, S);
  PutObject(Index, AObject);
end;

procedure TWideStrings.LoadFromFile(const FileName: WideString);
var
  Stream: TStream;
begin
  Stream := TTntFileStream.Create(FileName, fmOpenRead or fmShareDenyWrite);
  try
    LoadFromStream(Stream);
  finally
    Stream.Free;
  end;
end;

procedure TWideStrings.LoadFromStream(Stream: TStream);
var
  Size: Integer;
  S: WideString;
begin
  BeginUpdate;
  try
    Size := Stream.Size - Stream.Position;
    SetString(S, nil, Size div SizeOf(WideChar));
    Stream.Read(Pointer(S)^, Length(S) * SizeOf(WideChar));
    SetTextStr(S);
  finally
    EndUpdate;
  end;
end;

procedure TWideStrings.Move(CurIndex, NewIndex: Integer);
var
  TempObject: TObject;
  TempString: WideString;
begin
  if CurIndex <> NewIndex then
  begin
    BeginUpdate;
    try
      TempString := Get(CurIndex);
      TempObject := GetObject(CurIndex);
      Delete(CurIndex);
      InsertObject(NewIndex, TempString, TempObject);
    finally
      EndUpdate;
    end;
  end;
end;

procedure TWideStrings.Put(Index: Integer; const S: WideString);
var
  TempObject: TObject;
begin
  TempObject := GetObject(Index);
  Delete(Index);
  InsertObject(Index, S, TempObject);
end;

procedure TWideStrings.PutObject(Index: Integer; AObject: TObject);
begin
end;

procedure TWideStrings.ReadData(Reader: TReader);
begin
  if Reader.NextValue in [vaString, vaLString] then
    SetTextStr(Reader.ReadString) {JCL compatiblity}
  else if Reader.NextValue = vaWString then
    SetTextStr(Reader.ReadWideString) {JCL compatiblity}
  else begin
    BeginUpdate;
    try
      Clear;
      Reader.ReadListBegin;
      while not Reader.EndOfList do
        if Reader.NextValue in [vaString, vaLString] then
          Add(Reader.ReadString) {TStrings compatiblity}
        else
          Add(Reader.ReadWideString);
      Reader.ReadListEnd;
    finally
      EndUpdate;
    end;
  end;
end;

procedure TWideStrings.SaveToFile(const FileName: WideString);
var
  Stream: TStream;
begin
  Stream := TTntFileStream.Create(FileName, fmCreate);
  try
    SaveToStream(Stream);
  finally
    Stream.Free;
  end;
end;

procedure TWideStrings.SaveToStream(Stream: TStream);
var
  SW: WideString;
begin
  SW := GetTextStr;
  Stream.WriteBuffer(PWideChar(SW)^, Length(SW) * SizeOf(WideChar));
end;

procedure TWideStrings.SetCapacity(NewCapacity: Integer);
begin
  // do nothing - descendents may optionally implement this method
end;

procedure TWideStrings.SetCommaText(const Value: WideString);
begin
  Delimiter := ',';
  QuoteChar := '"';
  SetDelimitedText(Value);
end;

procedure TWideStrings.SetStringsAdapter(const Value: IWideStringsAdapter);
begin
  if FAdapter <> nil then FAdapter.ReleaseStrings;
  FAdapter := Value;
  if FAdapter <> nil then FAdapter.ReferenceStrings(Self);
end;

procedure TWideStrings.SetTextW(const Text: PWideChar);
begin
  SetTextStr(Text);
end;

procedure TWideStrings.SetTextStr(const Value: WideString);
var
  P, Start: PWideChar;
  S: WideString;
begin
  BeginUpdate;
  try
    Clear;
    P := Pointer(Value);
    if P <> nil then
      while P^ <> #0 do
      begin
        Start := P;
        while not (P^ in [WideChar(#0), WideChar(#10), WideChar(#13)]) and (P^ <> WideLineSeparator) do
          Inc(P);
        SetString(S, Start, P - Start);
        Add(S);
        if P^ = #13 then Inc(P);
        if P^ = #10 then Inc(P);
        if P^ = WideLineSeparator then Inc(P);
      end;
  finally
    EndUpdate;
  end;
end;

procedure TWideStrings.SetUpdateState(Updating: Boolean);
begin
end;

procedure TWideStrings.SetValue(const Name, Value: WideString);
var
  I: Integer;
begin
  I := IndexOfName(Name);
  if Value <> '' then
  begin
    if I < 0 then I := Add('');
    Put(I, Name + NameValueSeparator + Value);
  end else
  begin
    if I >= 0 then Delete(I);
  end;
end;

procedure TWideStrings.WriteData(Writer: TWriter);
var
  I: Integer;
begin
  Writer.WriteListBegin;
  for I := 0 to Count-1 do begin
    Writer.WriteWideString(Get(I));
  end;
  Writer.WriteListEnd;
end;

procedure TWideStrings.SetDelimitedText(const Value: WideString);
var
  P, P1: PWideChar;
  S: WideString;
begin
  BeginUpdate;
  try
    Clear;
    P := PWideChar(Value);
    while P^ in [WideChar(#1)..WideChar(' ')] do
      Inc(P);
    while P^ <> #0 do
    begin
      if P^ = QuoteChar then
        S := WideExtractQuotedStr(P, QuoteChar)
      else
      begin
        P1 := P;
        while (P^ > ' ') and (P^ <> Delimiter) do
          Inc(P);
        SetString(S, P1, P - P1);
      end;
      Add(S);
      while P^ in [WideChar(#1)..WideChar(' ')] do
        Inc(P);
      if P^ = Delimiter then
      begin
        P1 := P;
        Inc(P1);
        if P1^ = #0 then
          Add('');
        repeat
          Inc(P);
        until not (P^ in [WideChar(#1)..WideChar(' ')]);
      end;
    end;
  finally
    EndUpdate;
  end;
end;

function TWideStrings.GetDelimiter: WideChar;
begin
  if not (sdDelimiter in FDefined) then
    Delimiter := ',';
  Result := FDelimiter;
end;

function TWideStrings.GetQuoteChar: WideChar;
begin
  if not (sdQuoteChar in FDefined) then
    QuoteChar := '"';
  Result := FQuoteChar;
end;

procedure TWideStrings.SetDelimiter(const Value: WideChar);
begin
  if (FDelimiter <> Value) or not (sdDelimiter in FDefined) then
  begin
    Include(FDefined, sdDelimiter);
    FDelimiter := Value;
  end
end;

procedure TWideStrings.SetQuoteChar(const Value: WideChar);
begin
  if (FQuoteChar <> Value) or not (sdQuoteChar in FDefined) then
  begin
    Include(FDefined, sdQuoteChar);
    FQuoteChar := Value;
  end
end;

function TWideStrings.CompareStrings(const S1, S2: WideString): Integer;
begin
  Result := WideCompareText(S1, S2);
end;

function TWideStrings.GetNameValueSeparator: WideChar;
begin
  {$IFDEF COMPILER_7_UP}
  if not (sdNameValueSeparator in FDefined) then
    NameValueSeparator := '=';
  Result := FNameValueSeparator;
  {$ELSE}
  Result := '=';
  {$ENDIF}
end;

{$IFDEF COMPILER_7_UP}
procedure TWideStrings.SetNameValueSeparator(const Value: WideChar);
begin
  if (FNameValueSeparator <> Value) or not (sdNameValueSeparator in FDefined) then
  begin
    Include(FDefined, sdNameValueSeparator);
    FNameValueSeparator := Value;
  end
end;
{$ENDIF}

function TWideStrings.GetValueFromIndex(Index: Integer): WideString;
begin
  if Index >= 0 then
    Result := Copy(Get(Index), Length(Names[Index]) + 2, MaxInt) else
    Result := '';
end;

procedure TWideStrings.SetValueFromIndex(Index: Integer; const Value: WideString);
begin
  if Value <> '' then
  begin
    if Index < 0 then Index := Add('');
    Put(Index, Names[Index] + NameValueSeparator + Value);
  end
  else
    if Index >= 0 then Delete(Index);
end;

end.