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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: XML parser |
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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 "XMLParser.h" |
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25 #include "WBXMLAttributes.h" |
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26 |
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27 // ------------------------------------------------------------------------------------------------ |
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28 // Local functions |
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29 // ------------------------------------------------------------------------------------------------ |
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30 LOCAL_D void doPanic( const TDesC& aMsg, TInt aReason ) |
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31 { |
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32 User::Panic(aMsg, aReason); |
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33 } |
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34 |
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35 // ------------------------------------------------------------------------------------------------ |
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36 // CXMLParser |
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37 // ------------------------------------------------------------------------------------------------ |
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38 EXPORT_C CXMLParser* CXMLParser::NewL() |
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39 { |
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40 CXMLParser* self = new (ELeave) CXMLParser(); |
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41 CleanupStack::PushL(self); |
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42 self->ConstructL(); |
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43 CleanupStack::Pop(); // self |
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44 return self; |
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45 } |
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46 |
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47 // ------------------------------------------------------------------------------------------------ |
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48 void CXMLParser::ConstructL() |
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49 { |
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50 iBuffer = CBufFlat::NewL(32); |
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51 } |
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52 |
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53 // ------------------------------------------------------------------------------------------------ |
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54 EXPORT_C CXMLParser::~CXMLParser() |
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55 { |
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56 delete iBuffer; |
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57 delete iStringTable; |
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58 iStack.Reset(); |
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59 } |
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60 |
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61 // ------------------------------------------------------------------------------------------------ |
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62 EXPORT_C void CXMLParser::SetDocumentHandler( MWBXMLDocumentHandler* aHandler ) |
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63 { |
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64 iDocHandler = aHandler; |
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65 } |
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66 |
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67 // ------------------------------------------------------------------------------------------------ |
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68 EXPORT_C void CXMLParser::SetExtensionHandler( MWBXMLExtensionHandler* aHandler ) |
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69 { |
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70 iExtHandler = aHandler; |
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71 } |
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72 |
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73 // ------------------------------------------------------------------------------------------------ |
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74 EXPORT_C void CXMLParser::SetDocumentL( RReadStream& aInput ) |
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75 { |
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76 iInput = aInput; |
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77 iStack.Reset(); |
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78 iDocHdrParsed = EFalse; |
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79 if( iDocHandler ) |
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80 { |
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81 iDocHandler->DocumentChangedL(); |
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82 } |
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83 } |
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84 |
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85 // ------------------------------------------------------------------------------------------------ |
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86 EXPORT_C TWBXMLParserError CXMLParser::ParseL() |
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87 { |
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88 __ASSERT_ALWAYS(iDocHandler, doPanic(KXMLNoDocHandler, KErrGeneral)); |
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89 __ASSERT_ALWAYS(iExtHandler, doPanic(KXMLNoExtHandler, KErrGeneral)); |
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90 if( !iDocHdrParsed ) |
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91 { |
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92 TWBXMLParserError result(KWBXMLParserErrorOk); |
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93 TRAPD(err, result = doParseDocumentHeaderL()); |
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94 if( err == KErrEof ) |
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95 { |
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96 return KWBXMLParserErrorEofTooEarly; |
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97 } |
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98 return result; |
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99 } |
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100 return doParseDocumentBodyL(); |
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101 } |
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102 |
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103 // ------------------------------------------------------------------------------------------------ |
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104 TWBXMLParserError CXMLParser::doParseDocumentHeaderL() |
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105 { |
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106 iDocHdrParsed = ETrue; |
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107 |
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108 // Version |
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109 TUint8 version = readUint8L(); |
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110 |
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111 // PublicId |
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112 TInt32 publicId = readMUint32L(); |
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113 |
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114 if( publicId == 0 ) |
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115 { |
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116 publicId = readMUint32L(); |
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117 } |
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118 else |
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119 { |
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120 publicId = -publicId; |
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121 } |
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122 |
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123 // Charset |
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124 TUint32 charSet = readMUint32L(); |
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125 |
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126 // String table |
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127 readStringTableL(); |
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128 |
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129 // Document begings now |
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130 if( publicId < 0 ) |
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131 { |
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132 iDocHandler->StartDocumentL(version, -publicId, charSet); |
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133 } |
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134 else |
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135 { |
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136 iDocHandler->StartDocumentL(version, stringTableString(publicId), charSet); |
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137 } |
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138 |
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139 return KWBXMLParserErrorOk; |
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140 } |
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141 |
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142 // ------------------------------------------------------------------------------------------------ |
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143 TWBXMLParserError CXMLParser::doParseDocumentBodyL() |
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144 { |
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145 TUint8 id(0); |
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146 |
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147 TRAPD(err, id = readUint8L()); |
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148 |
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149 if( err != KErrNone ) |
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150 { |
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151 if( err == KErrEof ) |
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152 { |
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153 iDocHandler->EndDocumentL(); |
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154 if( iStack.Count() > 0 ) |
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155 { |
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156 return KWBXMLParserErrorEofTooEarly; |
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157 } |
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158 return KWBXMLParserErrorEof; |
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159 } |
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160 User::Leave(err); |
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161 } |
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162 |
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163 switch (id) |
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164 { |
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165 case SWITCH_PAGE: |
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166 { |
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167 TUint8 cp = readUint8L(); |
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168 if( cp != iCodePage ) |
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169 { |
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170 iDocHandler->CodePageSwitchL(cp); |
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171 iCodePage = cp; |
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172 } |
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173 } |
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174 break; |
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175 |
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176 case END: |
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177 { |
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178 if( !iStack.Count() ) |
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179 { |
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180 User::Leave(KErrParserErrorInvalidDocument); |
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181 } |
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182 TXMLStackItem si(iStack.operator[](iStack.Count() - 1)); |
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183 if( si.CodePage() != iCodePage ) |
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184 { |
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185 iDocHandler->CodePageSwitchL(si.CodePage()); |
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186 iCodePage = si.CodePage(); |
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187 } |
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188 iDocHandler->EndElementL(si.Tag()); |
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189 iStack.Remove(iStack.Count() - 1); |
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190 } |
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191 break; |
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192 |
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193 case ENTITY: |
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194 { |
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195 TUint8 b = readUint8L(); |
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196 iDocHandler->CharactersL(TPtrC8(&b, 1)); |
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197 } |
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198 break; |
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199 |
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200 case STR_I: |
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201 { |
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202 iDocHandler->CharactersL(readStrIL()); |
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203 } |
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204 break; |
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205 |
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206 case EXT_I_0: |
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207 case EXT_I_1: |
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208 case EXT_I_2: |
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209 case EXT_T_0: |
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210 case EXT_T_1: |
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211 case EXT_T_2: |
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212 case EXT_0: |
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213 case EXT_1: |
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214 case EXT_2: |
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215 case OPAQUE: |
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216 handleExtensionsL(id); |
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217 break; |
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218 |
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219 case STR_T: |
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220 iDocHandler->CharactersL(stringTableString(readMUint32L())); |
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221 break; |
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222 |
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223 case PI: |
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224 User::Leave(KErrNotSupported); |
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225 break; |
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226 |
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227 default: |
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228 handleElementL(id); |
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229 break; |
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230 } |
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231 |
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232 return KWBXMLParserErrorOk; |
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233 } |
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234 |
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235 // ------------------------------------------------------------------------------------------------ |
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236 TUint32 CXMLParser::readMUint32L() |
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237 { |
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238 TUint32 result = 0; |
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239 TUint8 c; |
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240 |
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241 do { |
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242 c = readUint8L(); |
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243 result = (result << 7) | (c & 0x7f); |
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244 } while ( c & 0x80 ); |
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245 |
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246 return result; |
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247 } |
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248 |
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249 // ------------------------------------------------------------------------------------------------ |
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250 TUint8 CXMLParser::readUint8L() |
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251 { |
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252 return iInput.ReadUint8L(); |
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253 } |
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254 |
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255 // ------------------------------------------------------------------------------------------------ |
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256 TPtrC8 CXMLParser::readStrIL() |
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257 { |
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258 iBuffer->Reset(); |
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259 RBufWriteStream bws(*iBuffer); |
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260 TUint8 c; |
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261 while( (c = readUint8L()) != 0 ) |
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262 { |
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263 bws.WriteUint8L(c); |
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264 } |
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265 bws.CommitL(); |
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266 return iBuffer->Ptr(0); |
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267 } |
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268 |
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269 // ------------------------------------------------------------------------------------------------ |
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270 TPtrC8 CXMLParser::readOpaqueL() |
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271 { |
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272 iBuffer->Reset(); |
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273 RBufWriteStream bws(*iBuffer); |
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274 bws.WriteL(iInput, readMUint32L()); |
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275 bws.CommitL(); |
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276 return iBuffer->Ptr(0); |
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277 } |
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278 |
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279 // ------------------------------------------------------------------------------------------------ |
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280 TPtrC8 CXMLParser::stringTableString( TUint32 aIndex ) |
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281 { |
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282 TPtrC8 temp(iStringTable->Mid(aIndex)); |
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283 TInt pos = temp.Find(KXMLNull()); |
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284 if( pos != KErrNotFound ) |
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285 { |
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286 return temp.Mid(0, pos); |
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287 } |
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288 return temp; |
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289 } |
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290 |
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291 // ------------------------------------------------------------------------------------------------ |
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292 void CXMLParser::readStringTableL() |
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293 { |
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294 delete iStringTable; |
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295 iStringTable = 0; |
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296 TUint32 strTblLen = readMUint32L(); |
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297 if( strTblLen > 0 ) |
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298 { |
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299 iStringTable = HBufC8::NewL(strTblLen); |
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300 TPtr8 ptr = iStringTable->Des(); |
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301 iInput.ReadL(ptr, strTblLen); |
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302 } |
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303 } |
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304 |
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305 // ------------------------------------------------------------------------------------------------ |
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306 void CXMLParser::handleExtensionsL( TUint8 aId ) |
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307 { |
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308 switch( aId ) |
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309 { |
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310 case EXT_I_0: |
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311 case EXT_I_1: |
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312 case EXT_I_2: |
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313 iExtHandler->Ext_IL(TUint8(aId - EXT_I_0), readStrIL()); |
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314 break; |
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315 |
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316 case EXT_T_0: |
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317 case EXT_T_1: |
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318 case EXT_T_2: |
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319 iExtHandler->Ext_TL(TUint8(aId - EXT_T_0), readMUint32L()); |
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320 break; |
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321 |
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322 case EXT_0: |
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323 case EXT_1: |
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324 case EXT_2: |
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325 iExtHandler->ExtL(TUint8(aId - EXT_0)); |
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326 break; |
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327 |
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328 case OPAQUE: |
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329 iExtHandler->OpaqueL(readOpaqueL()); |
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330 break; |
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331 |
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332 default: |
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333 User::Leave( KWBXMLParserErrorInvalidTag ); |
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334 } |
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335 } |
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336 |
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337 // ------------------------------------- ----------------------------------------------------------- |
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338 void CXMLParser::handleElementL( TUint8 aId ) |
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339 { |
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340 TUint8 aTag = TUint8(aId & 0x3f); |
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341 |
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342 CWBXMLAttributes* attr = CWBXMLAttributes::NewLC(); |
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343 |
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344 if( aId & 0x80 ) |
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345 { |
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346 readAttributesL(attr); |
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347 } |
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348 |
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349 iDocHandler->StartElementL(aTag, *attr); |
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350 |
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351 if( aId & 0x40 ) |
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352 { |
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353 TXMLStackItem si(aTag, iCodePage); |
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354 iStack.Append(si); |
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355 } |
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356 else |
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357 { |
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358 iDocHandler->EndElementL(aTag); |
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359 } |
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360 |
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361 CleanupStack::PopAndDestroy(); // attr |
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362 } |
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363 |
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364 // ------------------------------------------------------------------------------------------------ |
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365 void CXMLParser::readAttributesL( CWBXMLAttributes* aAttributes ) |
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366 { |
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367 TUint8 id = readUint8L(); |
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368 while( id != END ) |
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369 { |
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370 iBuffer->Reset(); |
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371 RBufWriteStream bws(*iBuffer); |
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372 TUint8 name = id; |
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373 id = readUint8L(); |
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374 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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375 { |
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376 switch (id) |
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377 { |
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378 case ENTITY: |
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379 bws.WriteUint8L(readUint8L()); |
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380 break; |
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381 |
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382 case STR_I: |
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383 bws.WriteL(readStrIL()); |
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384 break; |
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385 |
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386 case EXT_I_0: |
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387 case EXT_I_1: |
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388 case EXT_I_2: |
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389 case EXT_T_0: |
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390 case EXT_T_1: |
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391 case EXT_T_2: |
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392 case EXT_0: |
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393 case EXT_1: |
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394 case EXT_2: |
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395 case OPAQUE: |
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396 handleExtensionsL(id); |
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397 break; |
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398 |
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399 case STR_T: |
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400 bws.WriteL(stringTableString(readUint8L())); |
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401 break; |
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402 |
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403 default: |
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404 bws.WriteUint8L(id); |
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405 break; |
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406 } |
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407 id = readUint8L(); |
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408 } |
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409 bws.CommitL(); |
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410 aAttributes->AddAttributeL(name, iBuffer->Ptr(0)); |
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411 } |
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412 } |
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413 |
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414 //End of File |
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415 |
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416 |