1 | unit UMemoryStreamEx;
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2 |
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3 | interface
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4 |
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5 | uses
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6 | Classes, DateUtils;
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7 |
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8 | type
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9 | TMemoryStreamEx = class(TMemoryStream)
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10 | procedure WriteByte(Data: Byte);
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11 | procedure WriteWord(Data: Word);
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12 | procedure WriteCardinal(Data: Cardinal);
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13 | procedure WriteInt64(Data: Int64);
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14 | procedure WriteShortString(Data: ShortString);
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15 | procedure WriteUnixTime(Data: TDateTime);
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16 | procedure WriteStream(Stream: TStream);
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17 | function ReadByte: Byte;
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18 | function ReadWord: Word;
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19 | function ReadCardinal: Cardinal;
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20 | function ReadInt64: Int64;
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21 | function ReadShortString: string;
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22 | function ReadUnixTime: TDateTime;
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23 | procedure ReadStream(var Stream: TStream; Count: Integer);
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24 | end;
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25 |
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26 | implementation
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27 |
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28 | { TMemoryStreamEx }
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29 |
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30 | function TMemoryStreamEx.ReadByte: Byte;
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31 | begin
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32 | Read(Result, 1);
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33 | end;
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34 |
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35 | function TMemoryStreamEx.ReadCardinal: Cardinal;
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36 | begin
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37 | Read(Result, 4);
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38 | end;
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39 |
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40 | function TMemoryStreamEx.ReadInt64: Int64;
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41 | begin
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42 | Read(Result, 8);
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43 | end;
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44 |
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45 | function TMemoryStreamEx.ReadShortString: string;
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46 | var
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47 | Count: Byte;
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48 | begin
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49 | Count := 0;
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50 | Read(Count, 1);
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51 | SetLength(Result, Count);
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52 | Read(Result[1], Count);
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53 | end;
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54 |
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55 | procedure TMemoryStreamEx.ReadStream(var Stream: TStream; Count: Integer);
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56 | var
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57 | Buffer: array of Byte;
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58 | begin
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59 | if Count > 0 then begin
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60 | SetLength(Buffer, Count);
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61 | Read(Buffer[0], Count);
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62 | Stream.Size := Count;
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63 | Stream.Position := 0;
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64 | Stream.Write(Buffer[0], Count);
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65 | end;
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66 | end;
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67 |
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68 | function TMemoryStreamEx.ReadUnixTime: TDateTime;
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69 | begin
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70 | Result := UnixToDateTime(ReadCardinal);
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71 | end;
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72 |
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73 | function TMemoryStreamEx.ReadWord: Word;
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74 | begin
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75 | Read(Result, 2);
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76 | end;
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77 |
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78 | procedure TMemoryStreamEx.WriteByte(Data: Byte);
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79 | begin
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80 | Write(Data, 1);
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81 | end;
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82 |
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83 | procedure TMemoryStreamEx.WriteCardinal(Data: Cardinal);
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84 | begin
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85 | Write(Data, 4);
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86 | end;
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87 |
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88 | procedure TMemoryStreamEx.WriteInt64(Data: Int64);
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89 | begin
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90 | Write(Data, 8);
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91 | end;
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92 |
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93 | procedure TMemoryStreamEx.WriteShortString(Data: ShortString);
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94 | begin
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95 | WriteByte(Length(Data));
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96 | Write(Data[1], Length(Data))
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97 | end;
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98 |
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99 | procedure TMemoryStreamEx.WriteStream(Stream: TStream);
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100 | var
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101 | Buffer: array of Byte;
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102 | begin
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103 | Stream.Position := 0;
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104 | SetLength(Buffer, Stream.Size);
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105 | Stream.Read(Buffer[0], Stream.Size);
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106 | Write(Buffer[0], Stream.Size);
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107 | end;
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108 |
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109 | procedure TMemoryStreamEx.WriteUnixTime(Data: TDateTime);
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110 | var
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111 | DataUnix: Int64;
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112 | begin
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113 | DataUnix := DateTimeToUnix(Data);
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114 | Write(DataUnix, 4);
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115 | end;
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116 |
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117 | procedure TMemoryStreamEx.WriteWord(Data: Word);
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118 | begin
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119 | Write(Data, 2);
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120 | end;
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121 |
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122 | end.
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