1 | // Specification: http://code.google.com/intl/cs/apis/protocolbuffers/docs/overview.html
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2 | unit UProtocolBuffers;
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3 |
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4 | {$mode delphi}
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5 |
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6 | interface
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7 |
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8 | uses
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9 | Classes, SysUtils, Dialogs;
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10 |
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11 | type
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12 | TPBItemMode = (imRequired, imOptional, imRepeated);
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13 | TPBWireType = (wtVariant, wt64bit, wtLengthDelimited, wtStartGroup,
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14 | wtEndGroup, wt32bit);
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15 | TPBItemType = (itInteger, itString, itMessage, itFloat, itDouble, itBlock);
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16 |
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17 | TPBEnumeration = class
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18 | end;
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19 |
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20 | { TPBDefinition }
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21 | TPBDefinition = class
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22 | private
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23 | function GetWireType: TPBWireType;
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24 | public
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25 | Name: string;
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26 | Tag: Integer;
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27 | ItemType: TPBItemType;
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28 | ItemMode: TPBItemMode;
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29 | Items: TList; // TList<TPBDefinition>
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30 | DefaultString: string;
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31 | DefaultInteger: Integer;
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32 | DefaultDouble: Double;
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33 | constructor Create;
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34 | destructor Destroy; override;
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35 | function SearchItemByTag(Tag: Integer): Integer;
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36 | property WireType: TPBWireType read GetWireType;
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37 | end;
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38 |
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39 | { TPBItemHead }
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40 | TPBItemHead = record
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41 | Tag: Integer;
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42 | WireType: TPBWireType;
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43 | end;
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44 |
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45 | { TPBItem }
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46 | TPBItem = class
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47 | procedure SaveVariantToStream(Stream: TStream; Value: Integer);
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48 | function LoadVariantFromStream(Stream: TStream): Integer;
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49 | procedure SaveFixed32ToStream(Stream: TStream; Value: Cardinal);
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50 | function LoadFixed32FromStream(Stream: TStream): Cardinal;
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51 | procedure SaveFixed64ToStream(Stream: TStream; Value: QWord);
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52 | function LoadFixed64FromStream(Stream: TStream): QWord;
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53 | procedure SaveLengthDelimitedToStream(Stream: TStream; Block: TStream);
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54 | procedure LoadLengthDelimitedFromStream(Stream: TStream; Block: TStream);
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55 | procedure SaveHeadToStream(Stream: TStream; Definition: TPBDefinition);
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56 | function LoadHeadFromStream(Stream: TStream; Definition: TPBDefinition): TPBItemHead;
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57 | procedure SaveToStream(Stream: TStream; Definition: TPBDefinition); virtual;
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58 | procedure LoadFromStream(Stream: TStream; Definition: TPBDefinition); virtual;
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59 | procedure Clear(Definition: TPBDefinition); virtual;
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60 | procedure Assign(Source: TPBItem); virtual;
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61 | end;
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62 |
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63 | TPBMessageItem = class;
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64 |
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65 | { TPBStringItem }
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66 | TPBStringItem = class(TPBItem)
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67 | Value: string;
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68 | procedure SaveToStream(Stream: TStream; Definition: TPBDefinition); override;
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69 | procedure LoadFromStream(Stream: TStream; Definition: TPBDefinition); override;
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70 | constructor Create;
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71 | procedure Assign(Source: TPBItem); override;
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72 | end;
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73 |
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74 | { TPBIntegerItem }
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75 | TPBIntegerItem = class(TPBItem)
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76 | Value: Integer;
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77 | procedure SaveToStream(Stream: TStream; Definition: TPBDefinition); override;
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78 | procedure LoadFromStream(Stream: TStream; Definition: TPBDefinition); override;
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79 | constructor Create;
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80 | procedure Assign(Source: TPBItem); override;
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81 | end;
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82 |
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83 | { TPBFloatItem }
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84 | TPBFloatItem = class(TPBItem)
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85 | Value: Single;
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86 | procedure SaveToStream(Stream: TStream; Definition: TPBDefinition); override;
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87 | procedure LoadFromStream(Stream: TStream; Definition: TPBDefinition); override;
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88 | constructor Create;
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89 | procedure Assign(Source: TPBItem); override;
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90 | end;
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91 |
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92 | { TPBDoubleItem }
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93 | TPBDoubleItem = class(TPBItem)
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94 | Value: Double;
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95 | procedure SaveToStream(Stream: TStream; Definition: TPBDefinition); override;
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96 | procedure LoadFromStream(Stream: TStream; Definition: TPBDefinition); override;
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97 | constructor Create;
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98 | procedure Assign(Source: TPBItem); override;
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99 | end;
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100 |
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101 | { TPBMessageItem }
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102 | TPBMessageItem = class(TPBItem)
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103 | GenerateHead: Boolean;
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104 | Items: TList; // TList<TList<TPBItem>>;
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105 | procedure Clear(Definition: TPBDefinition); override;
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106 | procedure SaveToStream(Stream: TStream; Definition: TPBDefinition); override;
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107 | procedure LoadFromStream(Stream: TStream; Definition: TPBDefinition); override;
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108 | constructor Create;
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109 | destructor Destroy; override;
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110 | procedure Assign(Source: TPBItem); override;
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111 | end;
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112 |
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113 | { TPBRepeatedItem }
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114 |
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115 | TPBRepeatedItem = class(TPBItem)
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116 | Items: TList;
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117 | procedure Clear(Definition: TPBDefinition); override;
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118 | procedure SaveToStream(Stream: TStream; Definition: TPBDefinition); override;
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119 | procedure LoadFromStream(Stream: TStream; Definition: TPBDefinition); override;
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120 | constructor Create;
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121 | destructor Destroy; override;
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122 | procedure Assign(Source: TPBItem); override;
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123 | end;
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124 |
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125 | { TProtocolBuffer }
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126 | TProtocolBuffer = class
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127 | Definition: TPBDefinition;
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128 | BaseMessage: TPBMessageItem;
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129 | procedure LoadFromStream(Stream: TStream);
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130 | procedure SaveToStream(Stream: TStream);
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131 | procedure LoadFromProto(Source: TStringList);
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132 | constructor Create;
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133 | destructor Destroy; override;
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134 | end;
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135 |
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136 | implementation
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137 |
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138 | uses
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139 | UMemoryStreamEx;
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140 |
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141 | { TProtocolBuffer }
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142 |
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143 | procedure TProtocolBuffer.LoadFromStream(Stream: TStream);
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144 | begin
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145 | BaseMessage.GenerateHead := False;
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146 | BaseMessage.LoadFromStream(Stream, Definition);
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147 | end;
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148 |
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149 | procedure TProtocolBuffer.SaveToStream(Stream: TStream);
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150 | begin
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151 | BaseMessage.GenerateHead := False;
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152 | BaseMessage.SaveToStream(Stream, Definition);
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153 | end;
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154 |
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155 | procedure TProtocolBuffer.LoadFromProto(Source: TStringList);
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156 | begin
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157 |
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158 | end;
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159 |
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160 | constructor TProtocolBuffer.Create;
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161 | begin
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162 | BaseMessage := TPBMessageItem.Create;
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163 | Definition := TPBDefinition.Create;
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164 | Definition.ItemType := itMessage;
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165 | end;
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166 |
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167 | destructor TProtocolBuffer.Destroy;
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168 | begin
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169 | Definition.Destroy;
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170 | BaseMessage.Free;
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171 | inherited Destroy;
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172 | end;
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173 |
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174 | { TPBMessageItem }
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175 |
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176 | procedure TPBMessageItem.Clear(Definition: TPBDefinition);
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177 | var
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178 | I: Integer;
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179 | Q: Integer;
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180 | begin
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181 | for I := 0 to Items.Count - 1 do
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182 | TPBItem(Items[I]).Clear(Definition);
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183 | Items.Clear;
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184 | Items.Count := Definition.Items.Count;
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185 | for I := 0 to Items.Count - 1 do begin
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186 | if TPBDefinition(Definition.Items[I]).ItemMode = imRepeated then
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187 | Items[I] := TPBRepeatedItem.Create
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188 | else
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189 | if TPBDefinition(Definition.Items[I]).ItemType = itInteger then begin
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190 | Items[I] := TPBIntegerItem.Create;
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191 | TPBIntegerItem(Items[I]).Value := TPBDefinition(Definition.Items[I]).DefaultInteger;
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192 | end else
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193 | if TPBDefinition(Definition.Items[I]).ItemType = itFloat then begin
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194 | Items[I] := TPBFloatItem.Create;
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195 | TPBFloatItem(Items[I]).Value := TPBDefinition(Definition.Items[I]).DefaultDouble;
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196 | end else
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197 | if TPBDefinition(Definition.Items[I]).ItemType = itDouble then begin
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198 | Items[I] := TPBDoubleItem.Create;
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199 | TPBDoubleItem(Items[I]).Value := TPBDefinition(Definition.Items[I]).DefaultDouble;
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200 | end else
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201 | if TPBDefinition(Definition.Items[I]).ItemType = itString then begin
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202 | Items[I] := TPBStringItem.Create;
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203 | TPBStringItem(Items[I]).Value := TPBDefinition(Definition.Items[I]).DefaultString;
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204 | end else
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205 | if TPBDefinition(Definition.Items[I]).ItemType = itMessage then begin
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206 | Items[I] := TPBMessageItem.Create;
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207 | TPBMessageItem(Items[I]).Clear(Definition.Items[I]);
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208 | end;
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209 | end;
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210 | end;
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211 |
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212 | procedure TPBMessageItem.SaveToStream(Stream: TStream; Definition: TPBDefinition);
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213 | var
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214 | I: Integer;
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215 | Q: Integer;
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216 | TempStream: TMemoryStream;
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217 | begin
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218 | inherited;
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219 | // Generate message content to temporary stream
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220 | TempStream := TMemoryStream.Create;
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221 | if Items.Count <> Definition.Items.Count then
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222 | raise Exception.Create('Definition and value items count mismatch.');
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223 | for I := 0 to Definition.Items.Count - 1 do
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224 | TPBItem(Items[I]).SaveToStream(TempStream, Definition.Items[I]);
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225 |
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226 | // If head is used than write lenght-delimited head type with block byte length
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227 | if GenerateHead then begin
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228 | SaveHeadToStream(Stream, Definition);
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229 | SaveVariantToStream(Stream, TempStream.Size);
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230 | end;
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231 | TempStream.Position := 0;
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232 | TempStream.SaveToStream(Stream);
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233 | TempStream.Free;
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234 | end;
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235 |
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236 | procedure TPBMessageItem.LoadFromStream(Stream: TStream; Definition: TPBDefinition);
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237 | var
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238 | I: Integer;
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239 | TempItem: TPBItem;
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240 | ItemIndex: Integer;
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241 | EndIndex: Integer;
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242 | TempStream: TMemoryStream;
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243 | ItemHead: TPBItemHead;
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244 | NewItem: TPBItem;
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245 | begin
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246 | inherited;
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247 | TempStream := TMemoryStream.Create;
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248 |
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249 | if GenerateHead then begin
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250 | I := LoadVariantFromStream(Stream);
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251 | EndIndex := Stream.Position + I;
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252 | end else EndIndex := Stream.Size;
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253 |
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254 | TempItem := TPBItem.Create;
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255 | Clear(Definition);
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256 | while Stream.Position < EndIndex do begin
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257 | ItemHead := TempItem.LoadHeadFromStream(Stream, Definition);
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258 | ItemIndex := Definition.SearchItemByTag(ItemHead.Tag);
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259 | if ItemIndex <> -1 then
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260 | with TPBDefinition(Definition.Items[ItemIndex]) do begin
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261 | if WireType <> ItemHead.WireType then
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262 | raise Exception.Create('Bad type for item "' + TPBDefinition(Definition.Items[ItemIndex]).Name +
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263 | '" with tag ' + IntToStr(ItemHead.Tag));
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264 | if ItemType = itInteger then begin
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265 | NewItem := TPBIntegerItem.Create;
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266 | TPBIntegerItem(NewItem).LoadFromStream(Stream, Definition.Items[ItemIndex]);
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267 | end else
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268 | if TPBDefinition(Definition.Items[ItemIndex]).ItemType = itString then begin
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269 | NewItem := TPBStringItem.Create;
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270 | TPBStringItem(NewItem).LoadFromStream(Stream, Definition.Items[ItemIndex])
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271 | end else
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272 | if TPBDefinition(Definition.Items[ItemIndex]).ItemType = itFloat then begin
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273 | NewItem := TPBFloatItem.Create;
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274 | TPBFloatItem(NewItem).LoadFromStream(Stream, Definition.Items[ItemIndex])
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275 | end else
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276 | if TPBDefinition(Definition.Items[ItemIndex]).ItemType = itDouble then begin
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277 | NewItem := TPBDoubleItem.Create;
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278 | TPBDoubleItem(NewItem).LoadFromStream(Stream, Definition.Items[ItemIndex])
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279 | end else
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280 | if TPBDefinition(Definition.Items[ItemIndex]).ItemType = itMessage then begin
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281 | NewItem := TPBMessageItem.Create;
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282 | TPBMessageItem(NewItem).LoadFromStream(Stream, Definition.Items[ItemIndex]);
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283 | end;
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284 |
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285 | if ItemMode = imRepeated then begin
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286 | TPBRepeatedItem(Self.Items[ItemIndex]).Items.Add(NewItem);
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287 | end else begin
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288 | TPBItem(Self.Items[ItemIndex]).Assign(NewItem);
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289 | NewItem.Free;
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290 | end;
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291 | end else begin
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292 | // Skip item data
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293 | if ItemHead.WireType = wtVariant then
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294 | TempItem.LoadVariantFromStream(Stream)
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295 | else if ItemHead.WireType = wt32bit then
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296 | TempItem.LoadFixed32FromStream(Stream)
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297 | else if ItemHead.WireType = wt64bit then
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298 | TempItem.LoadFixed64FromStream(Stream)
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299 | else if ItemHead.WireType = wtLengthDelimited then
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300 | TempItem.LoadLengthDelimitedFromStream(Stream, TempStream);
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301 | end;
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302 | end;
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303 | TempStream.Free;
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304 | end;
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305 |
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306 | constructor TPBMessageItem.Create;
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307 | begin
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308 | Items := TList.Create;
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309 | GenerateHead := True;
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310 | end;
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311 |
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312 | destructor TPBMessageItem.Destroy;
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313 | var
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314 | I: Integer;
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315 | begin
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316 | for I := 0 to Items.Count - 1 do
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317 | TPBItem(Items[I]).Free;
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318 | Items.Free;
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319 | inherited Destroy;
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320 | end;
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321 |
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322 | procedure TPBMessageItem.Assign(Source: TPBItem);
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323 | var
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324 | I: Integer;
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325 | begin
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326 | if Source is TPBMessageItem then begin
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327 | GenerateHead := TPBMessageItem(Source).GenerateHead;
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328 | for I := 0 to Items.Count - 1 do
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329 | TPBItem(Items[I]).Assign(TPBMessageItem(Source).Items[I]);
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330 | end;
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331 | end;
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332 |
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333 | { TPBItem }
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334 |
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335 | procedure TPBItem.SaveVariantToStream(Stream: TStream; Value: Integer);
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336 | var
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337 | ByteIndex: Byte;
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338 | Data: Byte;
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339 | begin
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340 | with TMemoryStreamEx(Stream) do begin
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341 | Data := Value and $7f;
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342 | ByteIndex := 1;
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343 | while Value > (1 shl (ByteIndex * 7)) do begin
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344 | WriteByte(Data or $80);
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345 | Data := (Value shr (ByteIndex * 7)) and $7f;
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346 | Inc(ByteIndex);
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347 | end;
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348 | WriteByte(Data);
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349 | end
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350 | end;
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351 |
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352 | procedure TPBItem.SaveHeadToStream(Stream: TStream; Definition: TPBDefinition);
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353 | var
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354 | ByteIndex: Byte;
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355 | Data: Byte;
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356 | begin
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357 | with TMemoryStreamEx(Stream) do begin
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358 | Data := ((Definition.Tag and $f) shl 3) or (Integer(Definition.WireType) and $7);
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359 | ByteIndex := 0;
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360 | while Definition.Tag > (1 shl (ByteIndex * 7 + 4)) do begin
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361 | WriteByte(Data or $80);
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362 | Data := (Definition.Tag shr (ByteIndex * 7 + 4)) and $7f;
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363 | Inc(ByteIndex);
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364 | end;
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365 | WriteByte(Data);
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366 | end
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367 | end;
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368 |
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369 | function TPBItem.LoadHeadFromStream(Stream: TStream; Definition: TPBDefinition): TPBItemHead;
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370 | var
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371 | Data: Byte;
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372 | ByteIndex: Byte;
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373 | begin
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374 | Data := TMemoryStreamEx(Stream).ReadByte;
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375 | Result.WireType := TPBWireType(Data and 3);
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376 | Result.Tag := (Data shr 3) and $f;
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377 | ByteIndex := 0;
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378 | while Data > $7f do begin
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379 | Data := TMemoryStreamEx(Stream).ReadByte;
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380 | Result.Tag := Result.Tag or ((Data and $7f) shl (ByteIndex * 7 + 4));
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381 | Inc(ByteIndex);
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382 | end;
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383 | end;
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384 |
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385 | procedure TPBItem.SaveToStream(Stream: TStream; Definition: TPBDefinition);
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386 | begin
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387 |
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388 | end;
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389 |
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390 | procedure TPBItem.LoadFromStream(Stream: TStream; Definition: TPBDefinition);
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391 | begin
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392 |
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393 | end;
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394 |
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395 | procedure TPBItem.Clear(Definition: TPBDefinition);
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396 | begin
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397 |
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398 | end;
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399 |
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400 | procedure TPBItem.Assign(Source: TPBItem);
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401 | begin
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402 |
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403 | end;
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404 |
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405 | function TPBItem.LoadVariantFromStream(Stream: TStream): Integer;
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406 | var
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407 | Data: Byte;
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408 | ByteIndex: Byte;
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409 | begin
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410 | Data := TMemoryStreamEx(Stream).ReadByte;
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411 | Result := Data and $7f;
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412 | ByteIndex := 1;
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413 | while Data > $7f do begin
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414 | Data := TMemoryStreamEx(Stream).ReadByte;
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415 | Result := Result or ((Data and $7f) shl (ByteIndex * 7));
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416 | Inc(ByteIndex);
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417 | end;
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418 | end;
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419 |
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420 | procedure TPBItem.SaveFixed32ToStream(Stream: TStream; Value: Cardinal);
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421 | begin
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422 | TMemoryStreamEx(Stream).WriteCardinal(Value);
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423 | end;
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424 |
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425 | function TPBItem.LoadFixed32FromStream(Stream: TStream): Cardinal;
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426 | begin
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427 | Result := TMemoryStreamEx(Stream).ReadCardinal;
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428 | end;
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429 |
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430 | procedure TPBItem.SaveFixed64ToStream(Stream: TStream; Value: QWord);
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431 | begin
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432 | TMemoryStreamEx(Stream).WriteInt64(Value);
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433 | end;
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434 |
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435 | function TPBItem.LoadFixed64FromStream(Stream: TStream): QWord;
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436 | begin
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437 | Result := TMemoryStreamEx(Stream).ReadInt64;
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438 | end;
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439 |
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440 | procedure TPBItem.SaveLengthDelimitedToStream(Stream: TStream; Block: TStream);
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441 | begin
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442 | SaveVariantToStream(Stream, Block.Size);
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443 | Block.Position := 0;
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444 | TMemoryStreamEx(Block).ReadStream(Stream, Block.Size);
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445 | end;
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446 |
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447 | procedure TPBItem.LoadLengthDelimitedFromStream(Stream: TStream; Block: TStream
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448 | );
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449 | var
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450 | Size: Integer;
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451 | begin
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452 | Size := LoadVariantFromStream(Stream);
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453 | TMemoryStreamEx(Stream).ReadStream(Block, Size);
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454 | end;
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455 |
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456 | { TPBIntegerItem }
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457 |
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458 | procedure TPBIntegerItem.SaveToStream(Stream: TStream; Definition: TPBDefinition);
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459 | begin
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460 | inherited;
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461 | SaveHeadToStream(Stream, Definition);
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462 | SaveVariantToStream(Stream, Value);
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463 | end;
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464 |
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465 | procedure TPBIntegerItem.LoadFromStream(Stream: TStream; Definition: TPBDefinition);
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466 | begin
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467 | inherited;
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468 | Value := LoadVariantFromStream(Stream);
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469 | end;
|
---|
470 |
|
---|
471 | constructor TPBIntegerItem.Create;
|
---|
472 | begin
|
---|
473 | end;
|
---|
474 |
|
---|
475 | procedure TPBIntegerItem.Assign(Source: TPBItem);
|
---|
476 | begin
|
---|
477 | if Source is TPBIntegerItem then
|
---|
478 | Value := TPBIntegerItem(Source).Value;
|
---|
479 | end;
|
---|
480 |
|
---|
481 | { TPBStringItem }
|
---|
482 |
|
---|
483 | procedure TPBStringItem.SaveToStream(Stream: TStream; Definition: TPBDefinition);
|
---|
484 | begin
|
---|
485 | inherited;
|
---|
486 | SaveHeadToStream(Stream, Definition);
|
---|
487 | SaveVariantToStream(Stream, Length(Value));
|
---|
488 | if Length(Value) > 0 then
|
---|
489 | TMemoryStreamEx(Stream).Write(Value[1], Length(Value));
|
---|
490 | end;
|
---|
491 |
|
---|
492 | procedure TPBStringItem.LoadFromStream(Stream: TStream; Definition: TPBDefinition);
|
---|
493 | begin
|
---|
494 | inherited;
|
---|
495 | SetLength(Value, LoadVariantFromStream(Stream));
|
---|
496 | if Length(Value) > 0 then
|
---|
497 | TMemoryStreamEx(Stream).Read(Value[1], Length(Value));
|
---|
498 | end;
|
---|
499 |
|
---|
500 | constructor TPBStringItem.Create;
|
---|
501 | begin
|
---|
502 | end;
|
---|
503 |
|
---|
504 | procedure TPBStringItem.Assign(Source: TPBItem);
|
---|
505 | begin
|
---|
506 | if Source is TPBStringItem then
|
---|
507 | Value := TPBStringItem(Source).Value;
|
---|
508 | inherited Assign(Source);
|
---|
509 | end;
|
---|
510 |
|
---|
511 | { TPBDefinition }
|
---|
512 |
|
---|
513 | function TPBDefinition.SearchItemByTag(Tag: Integer): Integer;
|
---|
514 | var
|
---|
515 | I: Integer;
|
---|
516 | begin
|
---|
517 | I := 0;
|
---|
518 | while (I < Items.Count) and (TPBDefinition(Items[I]).Tag <> Tag) do Inc(I);
|
---|
519 | if I < Items.Count then Result := I
|
---|
520 | else Result := -1;
|
---|
521 | end;
|
---|
522 |
|
---|
523 | function TPBDefinition.GetWireType: TPBWireType;
|
---|
524 | begin
|
---|
525 | case ItemType of
|
---|
526 | itInteger: Result := wtVariant;
|
---|
527 | itFloat: Result := wt32bit;
|
---|
528 | itDouble: Result := wt64bit;
|
---|
529 | itString: Result := wtLengthDelimited;
|
---|
530 | itMessage: Result := wtLengthDelimited;
|
---|
531 | end;
|
---|
532 | end;
|
---|
533 |
|
---|
534 | constructor TPBDefinition.Create;
|
---|
535 | begin
|
---|
536 | Items := TList.Create;
|
---|
537 | end;
|
---|
538 |
|
---|
539 | destructor TPBDefinition.Destroy;
|
---|
540 | var
|
---|
541 | I: Integer;
|
---|
542 | begin
|
---|
543 | for I := 0 to Items.Count - 1 do
|
---|
544 | TPBDefinition(Items[I]).Destroy;
|
---|
545 | Items.Free;
|
---|
546 | inherited Destroy;
|
---|
547 | end;
|
---|
548 |
|
---|
549 | { TPBRepeatedItem }
|
---|
550 |
|
---|
551 | procedure TPBRepeatedItem.Clear(Definition: TPBDefinition);
|
---|
552 | var
|
---|
553 | I: Integer;
|
---|
554 | begin
|
---|
555 | for I := 0 to Items.Count - 1 do begin
|
---|
556 | TPBItem(Items[I]).Free;
|
---|
557 | if Definition.ItemType = itInteger then begin
|
---|
558 | Items[I] := TPBIntegerItem.Create;
|
---|
559 | TPBIntegerItem(Items[I]).Value := Definition.DefaultInteger;
|
---|
560 | end else
|
---|
561 | if Definition.ItemType = itFloat then begin
|
---|
562 | Items[I] := TPBFloatItem.Create;
|
---|
563 | TPBFloatItem(Items[I]).Value := Definition.DefaultDouble;
|
---|
564 | end else
|
---|
565 | if Definition.ItemType = itDouble then begin
|
---|
566 | Items[I] := TPBDoubleItem.Create;
|
---|
567 | TPBDoubleItem(Items[I]).Value := Definition.DefaultDouble;
|
---|
568 | end else
|
---|
569 | if Definition.ItemType = itString then begin
|
---|
570 | Items[I] := TPBStringItem.Create;
|
---|
571 | TPBStringItem(Items[I]).Value := Definition.DefaultString;
|
---|
572 | end else
|
---|
573 | if Definition.ItemType = itMessage then begin
|
---|
574 | Items[I] := TPBMessageItem.Create;
|
---|
575 | TPBMessageItem(Items[I]).Clear(Definition);
|
---|
576 | end;
|
---|
577 | end;
|
---|
578 | inherited;
|
---|
579 | end;
|
---|
580 |
|
---|
581 | procedure TPBRepeatedItem.SaveToStream(Stream: TStream;
|
---|
582 | Definition: TPBDefinition);
|
---|
583 | var
|
---|
584 | I: Integer;
|
---|
585 | begin
|
---|
586 | for I := 0 to Items.Count - 1 do begin
|
---|
587 | TPBItem(Items[I]).SaveToStream(Stream, Definition);
|
---|
588 | end;
|
---|
589 | end;
|
---|
590 |
|
---|
591 | procedure TPBRepeatedItem.LoadFromStream(Stream: TStream;
|
---|
592 | Definition: TPBDefinition);
|
---|
593 | begin
|
---|
594 | inherited LoadFromStream(Stream, Definition);
|
---|
595 | end;
|
---|
596 |
|
---|
597 | constructor TPBRepeatedItem.Create;
|
---|
598 | begin
|
---|
599 | Items := TList.Create;
|
---|
600 | end;
|
---|
601 |
|
---|
602 | destructor TPBRepeatedItem.Destroy;
|
---|
603 | var
|
---|
604 | I: Integer;
|
---|
605 | begin
|
---|
606 | for I := 0 to Items.Count - 1 do
|
---|
607 | TPBItem(Items[I]).Free;
|
---|
608 | Items.Free;
|
---|
609 | inherited Destroy;
|
---|
610 | end;
|
---|
611 |
|
---|
612 | procedure TPBRepeatedItem.Assign(Source: TPBItem);
|
---|
613 | var
|
---|
614 | I: Integer;
|
---|
615 | begin
|
---|
616 | if Source is TPBRepeatedItem then begin
|
---|
617 | for I := 0 to Items.Count - 1 do
|
---|
618 | TPBItem(Items[I]).Assign(TPBRepeatedItem(Source).Items[I]);
|
---|
619 | end;
|
---|
620 | inherited Assign(Source);
|
---|
621 | end;
|
---|
622 |
|
---|
623 | { TPBFloatItem }
|
---|
624 |
|
---|
625 | procedure TPBFloatItem.SaveToStream(Stream: TStream; Definition: TPBDefinition
|
---|
626 | );
|
---|
627 | begin
|
---|
628 | SaveHeadToStream(Stream, Definition);
|
---|
629 | SaveFixed32ToStream(Stream, Cardinal(Value));
|
---|
630 | end;
|
---|
631 |
|
---|
632 | procedure TPBFloatItem.LoadFromStream(Stream: TStream; Definition: TPBDefinition
|
---|
633 | );
|
---|
634 | begin
|
---|
635 | inherited;
|
---|
636 | Value := Single(LoadFixed32FromStream(Stream));
|
---|
637 | end;
|
---|
638 |
|
---|
639 | constructor TPBFloatItem.Create;
|
---|
640 | begin
|
---|
641 |
|
---|
642 | end;
|
---|
643 |
|
---|
644 | procedure TPBFloatItem.Assign(Source: TPBItem);
|
---|
645 | begin
|
---|
646 | if Source is TPBFloatItem then
|
---|
647 | Value := TPBFloatItem(Source).Value;
|
---|
648 | end;
|
---|
649 |
|
---|
650 | { TPBDoubleItem }
|
---|
651 |
|
---|
652 | procedure TPBDoubleItem.SaveToStream(Stream: TStream; Definition: TPBDefinition
|
---|
653 | );
|
---|
654 | begin
|
---|
655 | SaveHeadToStream(Stream, Definition);
|
---|
656 | SaveFixed64ToStream(Stream, QWord(Value));
|
---|
657 | end;
|
---|
658 |
|
---|
659 | procedure TPBDoubleItem.LoadFromStream(Stream: TStream;
|
---|
660 | Definition: TPBDefinition);
|
---|
661 | begin
|
---|
662 | inherited;
|
---|
663 | Value := Double(LoadFixed64FromStream(Stream));
|
---|
664 | end;
|
---|
665 |
|
---|
666 | constructor TPBDoubleItem.Create;
|
---|
667 | begin
|
---|
668 |
|
---|
669 | end;
|
---|
670 |
|
---|
671 | procedure TPBDoubleItem.Assign(Source: TPBItem);
|
---|
672 | begin
|
---|
673 | if Source is TPBDoubleItem then
|
---|
674 | Value := TPBDoubleItem(Source).Value;
|
---|
675 | end;
|
---|
676 |
|
---|
677 | end.
|
---|
678 |
|
---|