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