129 lines
2.5 KiB
ObjectPascal
129 lines
2.5 KiB
ObjectPascal
unit XMLDataBindingHelpers;
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interface
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uses
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Classes;
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type
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TStreamHelper = class(TObject)
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private
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FOwnership: TStreamOwnership;
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FStream: TStream;
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public
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constructor Create(AStream: TStream; AOwnership: TStreamOwnership = soReference);
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destructor Destroy(); override;
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function ReadString(ASize: Integer = -1): String;
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function ReadInteger(): Integer;
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function ReadDateTime(): TDateTime;
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function ReadBoolean(): Boolean;
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procedure Write(const ASource: String);
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procedure WriteLn(const ASource: String = '');
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procedure WriteString(const ASource: String);
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procedure WriteInteger(const ASource: Integer);
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procedure WriteDateTime(const ASource: TDateTime);
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procedure WriteBoolean(const ASource: Boolean);
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end;
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implementation
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uses
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SysUtils;
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{ TStreamHelper }
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constructor TStreamHelper.Create(AStream: TStream; AOwnership: TStreamOwnership);
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begin
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FOwnership := AOwnership;
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FStream := AStream;
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inherited Create();
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end;
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destructor TStreamHelper.Destroy();
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begin
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if FOwnership = soOwned then
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FreeAndNil(FStream);
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inherited;
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end;
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function TStreamHelper.ReadString(ASize: Integer): String;
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var
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iSize: Integer;
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begin
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if ASize = -1 then
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iSize := ReadInteger()
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else
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iSize := ASize;
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SetLength(Result, iSize);
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FStream.Read(PChar(Result)^, iSize);
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end;
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function TStreamHelper.ReadInteger(): Integer;
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begin
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FStream.Read(Result, SizeOf(Integer));
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end;
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function TStreamHelper.ReadDateTime(): TDateTime;
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begin
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FStream.Read(Result, SizeOf(TDateTime));
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end;
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function TStreamHelper.ReadBoolean(): Boolean;
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begin
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FStream.Read(Result, SizeOf(Boolean));
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end;
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procedure TStreamHelper.Write(const ASource: String);
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begin
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FStream.Write(PChar(ASource)^, Length(ASource));
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end;
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procedure TStreamHelper.WriteLn(const ASource: String);
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begin
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Write(ASource + #13#10);
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end;
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procedure TStreamHelper.WriteString(const ASource: String);
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var
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iSize: Integer;
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begin
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iSize := Length(ASource);
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WriteInteger(iSize);
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FStream.Write(PChar(ASource)^, iSize);
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end;
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procedure TStreamHelper.WriteInteger(const ASource: Integer);
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begin
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FStream.Write(ASource, SizeOf(Integer));
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end;
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procedure TStreamHelper.WriteDateTime(const ASource: TDateTime);
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begin
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FStream.Write(ASource, SizeOf(TDateTime));
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end;
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procedure TStreamHelper.WriteBoolean(const ASource: Boolean);
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begin
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FStream.Write(ASource, SizeOf(Boolean));
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end;
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end.
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