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1 /* |
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2 * Copyright (c) 2002 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Generic WBXML parser class implementation. |
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15 * |
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16 */ |
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17 |
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18 |
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19 // ------------------------------------------------------------------------------------------------ |
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20 // Includes |
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21 // ------------------------------------------------------------------------------------------------ |
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22 #include <s32mem.h> |
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23 |
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24 #include "WBXMLParser.h" |
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25 #include "WBXMLAttributes.h" |
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26 |
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27 // ------------------------------------------------------------------------------------------------ |
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28 // Constants |
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29 // ------------------------------------------------------------------------------------------------ |
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30 const TInt KNSmlBufferGranularity( 32 ); |
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31 |
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32 // ------------------------------------------------------------------------------------------------ |
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33 // Local functions |
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34 // ------------------------------------------------------------------------------------------------ |
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35 LOCAL_D void doPanic( const TDesC& aMsg, TInt aReason ) |
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36 { |
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37 User::Panic(aMsg, aReason); |
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38 } |
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39 |
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40 // ------------------------------------------------------------------------------------------------ |
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41 // CWBXMLParser |
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42 // ------------------------------------------------------------------------------------------------ |
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43 EXPORT_C CWBXMLParser* CWBXMLParser::NewL() |
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44 { |
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45 CWBXMLParser* self = new (ELeave) CWBXMLParser(); |
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46 CleanupStack::PushL(self); |
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47 self->ConstructL(); |
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48 CleanupStack::Pop(); // self |
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49 return self; |
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50 } |
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51 |
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52 // ------------------------------------------------------------------------------------------------ |
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53 void CWBXMLParser::ConstructL() |
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54 { |
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55 iBuffer = CBufFlat::NewL(KNSmlBufferGranularity); |
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56 } |
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57 |
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58 // ------------------------------------------------------------------------------------------------ |
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59 EXPORT_C CWBXMLParser::~CWBXMLParser() |
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60 { |
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61 delete iBuffer; |
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62 delete iStringTable; |
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63 iStack.Reset(); |
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64 } |
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65 |
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66 // ------------------------------------------------------------------------------------------------ |
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67 EXPORT_C void CWBXMLParser::SetDocumentHandler( MWBXMLDocumentHandler* aHandler ) |
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68 { |
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69 iDocHandler = aHandler; |
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70 } |
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71 |
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72 // ------------------------------------------------------------------------------------------------ |
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73 EXPORT_C void CWBXMLParser::SetExtensionHandler( MWBXMLExtensionHandler* aHandler ) |
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74 { |
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75 iExtHandler = aHandler; |
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76 } |
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77 |
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78 // ------------------------------------------------------------------------------------------------ |
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79 EXPORT_C void CWBXMLParser::SetDocumentL( RReadStream& aInput ) |
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80 { |
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81 iInput = aInput; |
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82 iStack.Reset(); |
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83 iDocHdrParsed = EFalse; |
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84 if( iDocHandler ) |
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85 { |
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86 iDocHandler->DocumentChangedL(); |
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87 } |
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88 } |
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89 |
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90 // ------------------------------------------------------------------------------------------------ |
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91 EXPORT_C TWBXMLParserError CWBXMLParser::ParseL() |
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92 { |
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93 __ASSERT_ALWAYS(iDocHandler, doPanic(KWBXMLNoDocHandler, KErrGeneral)); |
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94 __ASSERT_ALWAYS(iExtHandler, doPanic(KWBXMLNoExtHandler, KErrGeneral)); |
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95 if( !iDocHdrParsed ) |
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96 { |
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97 TWBXMLParserError result(KWBXMLParserErrorOk); |
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98 TRAPD(err, result = DoParseDocumentHeaderL()); |
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99 if( err == KErrEof ) |
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100 { |
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101 return KWBXMLParserErrorEofTooEarly; |
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102 } |
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103 return result; |
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104 } |
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105 return DoParseDocumentBodyL(); |
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106 } |
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107 |
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108 // ------------------------------------------------------------------------------------------------ |
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109 TWBXMLParserError CWBXMLParser::DoParseDocumentHeaderL() |
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110 { |
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111 iDocHdrParsed = ETrue; |
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112 |
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113 // Version |
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114 TUint8 version = ReadUint8L(); |
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115 |
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116 // PublicId |
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117 TInt32 publicId = ReadMUint32L(); |
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118 |
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119 if( publicId == 0 ) |
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120 { |
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121 publicId = ReadMUint32L(); |
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122 } |
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123 else |
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124 { |
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125 publicId = -publicId; |
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126 } |
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127 |
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128 // Charset |
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129 TUint32 charSet = ReadMUint32L(); |
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130 |
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131 // String table |
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132 ReadStringTableL(); |
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133 |
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134 // Document begings now |
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135 if( publicId < 0 ) |
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136 { |
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137 iDocHandler->StartDocumentL(version, -publicId, charSet); |
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138 } |
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139 else |
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140 { |
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141 iDocHandler->StartDocumentL(version, StringTableString(publicId), charSet); |
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142 } |
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143 |
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144 return KWBXMLParserErrorOk; |
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145 } |
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146 |
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147 // ------------------------------------------------------------------------------------------------ |
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148 TWBXMLParserError CWBXMLParser::DoParseDocumentBodyL() |
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149 { |
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150 TUint8 id(0); |
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151 |
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152 TRAPD(err, id = ReadUint8L()); |
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153 |
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154 if( err != KErrNone ) |
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155 { |
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156 if( err == KErrEof ) |
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157 { |
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158 iDocHandler->EndDocumentL(); |
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159 if( iStack.Count() > 0 ) |
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160 { |
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161 return KWBXMLParserErrorEofTooEarly; |
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162 } |
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163 return KWBXMLParserErrorEof; |
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164 } |
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165 User::Leave(err); |
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166 } |
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167 |
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168 switch (id) |
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169 { |
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170 case SWITCH_PAGE: |
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171 { |
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172 TUint8 cp = ReadUint8L(); |
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173 if( cp != iCodePage ) |
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174 { |
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175 iDocHandler->CodePageSwitchL(cp); |
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176 iCodePage = cp; |
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177 } |
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178 } |
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179 break; |
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180 |
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181 case END: |
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182 { |
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183 if( !iStack.Count() ) |
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184 { |
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185 User::Leave(KErrParserErrorInvalidDocument); |
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186 } |
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187 TWBXMLStackItem si(iStack.operator[](iStack.Count() - 1)); |
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188 if( si.CodePage() != iCodePage ) |
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189 { |
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190 iDocHandler->CodePageSwitchL(si.CodePage()); |
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191 iCodePage = si.CodePage(); |
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192 } |
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193 iDocHandler->EndElementL(si.Tag()); |
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194 iStack.Remove(iStack.Count() - 1); |
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195 } |
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196 break; |
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197 |
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198 case ENTITY: |
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199 { |
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200 TUint8 b = ReadUint8L(); |
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201 iDocHandler->CharactersL(TPtrC8(&b, 1)); |
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202 } |
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203 break; |
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204 |
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205 case STR_I: |
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206 { |
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207 iDocHandler->CharactersL(ReadStrIL()); |
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208 } |
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209 break; |
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210 |
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211 case EXT_I_0: |
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212 case EXT_I_1: |
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213 case EXT_I_2: |
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214 case EXT_T_0: |
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215 case EXT_T_1: |
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216 case EXT_T_2: |
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217 case EXT_0: |
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218 case EXT_1: |
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219 case EXT_2: |
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220 case OPAQUE: |
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221 HandleExtensionsL(id); |
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222 break; |
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223 |
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224 case STR_T: |
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225 iDocHandler->CharactersL(StringTableString(ReadMUint32L())); |
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226 break; |
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227 |
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228 case PI: |
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229 User::Leave(KErrNotSupported); |
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230 break; |
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231 |
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232 default: |
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233 HandleElementL(id); |
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234 break; |
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235 } |
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236 |
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237 return KWBXMLParserErrorOk; |
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238 } |
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239 |
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240 // ------------------------------------------------------------------------------------------------ |
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241 TUint32 CWBXMLParser::ReadMUint32L() |
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242 { |
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243 TUint32 result = 0; |
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244 TUint8 c; |
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245 |
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246 do { |
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247 c = ReadUint8L(); |
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248 result = (result << 7) | (c & 0x7f); |
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249 } while ( c & 0x80 ); |
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250 |
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251 return result; |
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252 } |
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253 |
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254 // ------------------------------------------------------------------------------------------------ |
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255 TUint8 CWBXMLParser::ReadUint8L() |
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256 { |
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257 return iInput.ReadUint8L(); |
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258 } |
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259 |
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260 // ------------------------------------------------------------------------------------------------ |
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261 TPtrC8 CWBXMLParser::ReadStrIL() |
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262 { |
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263 iBuffer->Reset(); |
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264 RBufWriteStream bws(*iBuffer); |
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265 TUint8 c; |
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266 while( (c = ReadUint8L()) != 0 ) |
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267 { |
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268 bws.WriteUint8L(c); |
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269 } |
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270 bws.CommitL(); |
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271 return iBuffer->Ptr(0); |
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272 } |
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273 |
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274 // ------------------------------------------------------------------------------------------------ |
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275 TPtrC8 CWBXMLParser::ReadOpaqueL() |
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276 { |
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277 iBuffer->Reset(); |
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278 RBufWriteStream bws(*iBuffer); |
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279 bws.WriteL(iInput, ReadMUint32L()); |
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280 bws.CommitL(); |
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281 return iBuffer->Ptr(0); |
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282 } |
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283 |
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284 // ------------------------------------------------------------------------------------------------ |
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285 TPtrC8 CWBXMLParser::StringTableString( TUint32 aIndex ) |
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286 { |
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287 TPtrC8 temp(iStringTable->Mid(aIndex)); |
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288 TInt pos = temp.Find(KWBXMLNull()); |
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289 if( pos != KErrNotFound ) |
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290 { |
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291 temp.Set(temp.Left(pos)); |
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292 } |
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293 return temp; |
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294 } |
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295 |
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296 // ------------------------------------------------------------------------------------------------ |
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297 void CWBXMLParser::ReadStringTableL() |
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298 { |
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299 delete iStringTable; |
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300 iStringTable = 0; |
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301 TUint32 strTblLen = ReadMUint32L(); |
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302 if( strTblLen > 0 ) |
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303 { |
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304 iStringTable = HBufC8::NewL(strTblLen); |
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305 TPtr8 ptr = iStringTable->Des(); |
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306 iInput.ReadL(ptr, strTblLen); |
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307 } |
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308 } |
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309 |
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310 // ------------------------------------------------------------------------------------------------ |
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311 void CWBXMLParser::HandleExtensionsL( TUint8 aId ) |
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312 { |
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313 switch( aId ) |
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314 { |
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315 case EXT_I_0: |
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316 case EXT_I_1: |
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317 case EXT_I_2: |
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318 iExtHandler->Ext_IL(TUint8(aId - EXT_I_0), ReadStrIL()); |
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319 break; |
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320 |
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321 case EXT_T_0: |
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322 case EXT_T_1: |
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323 case EXT_T_2: |
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324 iExtHandler->Ext_TL(TUint8(aId - EXT_T_0), ReadMUint32L()); |
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325 break; |
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326 |
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327 case EXT_0: |
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328 case EXT_1: |
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329 case EXT_2: |
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330 iExtHandler->ExtL(TUint8(aId - EXT_0)); |
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331 break; |
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332 |
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333 case OPAQUE: |
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334 iExtHandler->OpaqueL(ReadOpaqueL()); |
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335 break; |
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336 |
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337 default: |
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338 User::Leave( KWBXMLParserErrorInvalidTag ); |
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339 } |
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340 } |
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341 |
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342 // ------------------------------------- ----------------------------------------------------------- |
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343 void CWBXMLParser::HandleElementL( TUint8 aId ) |
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344 { |
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345 TUint8 aTag = TUint8(aId & 0x3f); |
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346 |
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347 CWBXMLAttributes* attr = CWBXMLAttributes::NewLC(); |
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348 |
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349 if( aId & 0x80 ) |
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350 { |
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351 ReadAttributesL(attr); |
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352 } |
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353 |
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354 iDocHandler->StartElementL(aTag, *attr); |
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355 |
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356 if( aId & 0x40 ) |
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357 { |
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358 TWBXMLStackItem si(aTag, iCodePage); |
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359 iStack.Append(si); |
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360 } |
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361 else |
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362 { |
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363 iDocHandler->EndElementL(aTag); |
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364 } |
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365 |
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366 CleanupStack::PopAndDestroy(); // attr |
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367 } |
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368 |
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369 // ------------------------------------------------------------------------------------------------ |
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370 void CWBXMLParser::ReadAttributesL( CWBXMLAttributes* aAttributes ) |
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371 { |
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372 TUint8 id = ReadUint8L(); |
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373 while( id != END ) |
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374 { |
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375 iBuffer->Reset(); |
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376 RBufWriteStream bws(*iBuffer); |
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377 TUint8 name = id; |
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378 id = ReadUint8L(); |
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379 while( id > 0x80 || id == ENTITY || id == STR_I || id == STR_T || (id >= EXT_I_0 && id <= EXT_I_2) || (id >= EXT_T_0 && id <= EXT_T_2) ) |
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380 { |
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381 switch (id) |
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382 { |
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383 case ENTITY: |
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384 bws.WriteUint8L(ReadUint8L()); |
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385 break; |
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386 |
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387 case STR_I: |
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388 bws.WriteL(ReadStrIL()); |
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389 break; |
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390 |
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391 case EXT_I_0: |
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392 case EXT_I_1: |
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393 case EXT_I_2: |
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394 case EXT_T_0: |
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395 case EXT_T_1: |
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396 case EXT_T_2: |
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397 case EXT_0: |
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398 case EXT_1: |
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399 case EXT_2: |
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400 case OPAQUE: |
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401 HandleExtensionsL(id); |
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402 break; |
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403 |
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404 case STR_T: |
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405 bws.WriteL(StringTableString(ReadUint8L())); |
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406 break; |
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407 |
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408 default: |
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409 bws.WriteUint8L(id); |
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410 break; |
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411 } |
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412 id = ReadUint8L(); |
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413 } |
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414 bws.CommitL(); |
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415 aAttributes->AddAttributeL(name, iBuffer->Ptr(0)); |
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416 } |
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417 } |
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418 |
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419 //End of File |
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420 |
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421 |