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1 // Copyright (c) 2009 - 2010 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 /** |
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16 * @file BaRscImpl.cpp |
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17 * |
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18 * @internalComponent |
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19 * @released |
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20 */ |
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21 #include <iostream> |
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22 #include <fstream> |
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23 #include <cassert> |
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24 #include <sys/stat.h> |
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25 #include <sstream> |
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26 #include "barsc2.h" |
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27 #include "barscimpl.h" |
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28 #include "dictionarycompression.h" |
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29 #include "ucmp.h" |
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30 #include "util.h" |
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31 #include "parse.h" |
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32 |
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33 #define REINTERPRET_CAST(type,exp) (reinterpret_cast<type>(exp)) |
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34 #define CONST_CAST(type,exp) (const_cast<type>(exp)) |
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35 #define STATIC_CAST(type,exp) (static_cast<type>(exp)) |
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36 |
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37 inline TUint8* MemCopy(TAny* aTrg, const TAny* aSrc, TInt aLength) |
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38 { return (TUint8*)memmove(aTrg, aSrc, aLength) + aLength; } |
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39 |
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40 |
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41 /** Cleanup function. |
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42 @internalComponent |
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43 @param aArrayOfDictionaryCompressionBitStreams Pointer to an vector of |
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44 RDictionaryCompressionBitStream objects which have to be closed. */ |
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45 void CloseArrayOfDictionaryCompressionBitStreams(TAny* aArray) |
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46 { |
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47 typedef std::vector<RDictionaryCompressionBitStream> RDictComprBitStream; |
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48 RDictComprBitStream* array = static_cast <RDictComprBitStream*> (aArray); |
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49 for (TInt i=array->size()-1;i>=0;--i) |
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50 { |
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51 array[i].clear(); |
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52 } |
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53 array->clear(); |
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54 } |
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55 |
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56 RResourceFileImpl::TExtra::TExtra(): |
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57 iBitArrayOfResourcesContainingCompressedUnicode(NULL), |
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58 iFileOffset(0), |
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59 iFileSize(0) |
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60 { |
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61 } |
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62 |
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63 |
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64 RResourceFileImpl::TExtra::~TExtra() |
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65 { |
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66 delete [] iDictionaryCompressionData.iCachedResourceBuffer; |
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67 iDictionaryCompressionData.iCachedResourceBuffer = NULL; |
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68 delete [] iDictionaryCompressionData.iCachedDictionaryIndex; |
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69 iDictionaryCompressionData.iCachedDictionaryIndex = 0; |
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70 |
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71 delete iBitArrayOfResourcesContainingCompressedUnicode; |
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72 } |
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73 |
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74 |
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75 TInt32 RResourceFileImpl::TExtra::ContainsCompressedUnicode(TInt& aRscIdx, TBool aFirstRscIsGen) const |
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76 { |
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77 |
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78 if (aFirstRscIsGen) |
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79 { |
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80 // dictionary-compressed resource files can have an automatically generated |
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81 //resource which is the bit-array of resources containing compressed Unicode |
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82 //(this automatically generated resource does not have a corresponding bit |
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83 //for itself in the bit-array as it would be self-referring...) |
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84 --aRscIdx; |
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85 if (aRscIdx<0) |
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86 { |
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87 //aRscIdx is referring to the automatically generated resource |
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88 //(which is the bit-array of resources containing compressed Unicode) |
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89 return EFalse; |
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90 } |
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91 } |
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92 |
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93 assert(aRscIdx>=0); |
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94 |
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95 if (iBitArrayOfResourcesContainingCompressedUnicode==NULL) |
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96 { |
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97 return EFalse; |
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98 } |
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99 |
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100 TInt index = aRscIdx/8; |
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101 assert(index < iBitArrayOfResourcesContainingCompressedUnicode->GetLength()); |
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102 return (*iBitArrayOfResourcesContainingCompressedUnicode)[index]&(1<<(aRscIdx%8)); |
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103 } |
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104 |
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105 |
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106 RResourceFileImpl::RResourceFileImpl() : |
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107 iResourceContents(NULL), |
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108 iSizeOfLargestResourceWhenCompletelyUncompressed(0), |
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109 iIndex(NULL), |
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110 iOffset(0), |
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111 iExtra(NULL), |
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112 iFlagsAndNumberOfResources(0) |
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113 { |
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114 // Fixed class size - because of the BC reasons. |
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115 // RResourceFileImpl size must be the same as CResourceFile size. |
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116 enum |
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117 { |
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118 KRscFileImplSize = 24 |
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119 }; |
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120 assert(sizeof(RResourceFileImpl) == KRscFileImplSize); |
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121 |
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122 //Fixed "iOffset" position - because of the BC reasons. |
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123 assert(offsetof(RResourceFileImpl, iOffset)==12); |
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124 } |
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125 |
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126 |
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127 RResourceFileImpl::~RResourceFileImpl() |
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128 { |
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129 if(iResourceContents) |
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130 { |
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131 if (iResourceContents->is_open()) |
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132 { |
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133 iResourceContents->close(); |
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134 } |
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135 delete iResourceContents; |
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136 } |
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137 iSizeOfLargestResourceWhenCompletelyUncompressed=0; |
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138 delete iIndex; |
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139 iIndex=NULL; |
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140 if (iExtra) |
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141 { |
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142 delete iExtra; |
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143 iExtra=NULL; |
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144 } |
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145 |
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146 iFlagsAndNumberOfResources=0; |
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147 iOffset=0; |
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148 } |
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149 |
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150 /** Opens the resource file reader. |
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151 The resource file reader must be opened before reading resources or |
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152 checking the signature of the resource file. |
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153 @internalComponent |
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154 @param aName File to open as a resource file. |
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155 @param aFileOffset The resource file section offset from the beginning of the file. |
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156 @param aFileSize The resource file section size. |
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157 @leave - The file is corrupted. |
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158 */ |
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159 void RResourceFileImpl::OpenL( |
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160 const std::string& aName, |
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161 TUint32 aFileOffset, |
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162 TInt aFileSize) |
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163 { |
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164 iResourceContents= new std::ifstream(aName.c_str(), std::ios::in|std::ios::binary); |
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165 |
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166 if(!iResourceContents->good()) |
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167 { |
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168 std::string errMsg= "Unable to open RSC file. " + aName; |
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169 if (iResourceContents->is_open()) |
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170 iResourceContents->close(); |
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171 if(iResourceContents) |
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172 delete iResourceContents; |
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173 throw CResourceFileException(errMsg); |
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174 } |
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175 |
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176 iExtra=new TExtra(); |
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177 iExtra->iFileOffset = aFileOffset; |
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178 |
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179 TInt fileSize = 0; |
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180 if (aFileSize) |
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181 { |
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182 fileSize = aFileSize; |
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183 assert(fileSize > TInt(aFileOffset)); |
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184 } |
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185 else |
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186 { |
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187 // Get the resource file size |
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188 struct stat resourceFileStats; |
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189 |
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190 if (stat(aName.c_str(),&resourceFileStats) == 0) |
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191 { |
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192 // The size of the file in bytes is in |
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193 // resourceFileStats.st_size |
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194 fileSize=resourceFileStats.st_size; |
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195 assert(fileSize > 0); |
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196 } |
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197 else |
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198 { |
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199 if (iResourceContents->is_open()) |
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200 iResourceContents->close(); |
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201 std::string errMsg="Invalid RSC File"; |
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202 throw CResourceFileException(errMsg); |
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203 } |
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204 } |
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205 |
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206 iExtra->iFileSize = fileSize; |
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207 |
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208 // Verify the header of the RSC and get the resource index |
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209 ReadHeaderAndResourceIndexL(); |
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210 } |
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211 |
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212 |
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213 /** |
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214 Retrieve the UID tuple of the opened resource file. |
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215 |
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216 @internalComponent |
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217 @pre OpenL() has been called successfully. |
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218 @return The UIDs of the loaded resource file. |
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219 */ |
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220 TUidType RResourceFileImpl::UidType() const |
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221 { |
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222 assert(iExtra!=NULL); |
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223 return iExtra->iUidType; |
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224 } |
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225 |
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226 /** Reads a resource into a heap buffer, returns a pointer to that |
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227 buffer. |
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228 |
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229 A heap buffer of appropriate length is allocated for the resource. |
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230 Ownership of the heap buffer passes to the caller who must destroy |
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231 it. The search for the resource uses the following algorithm:A |
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232 resource id in the range 1 to 4095 is looked up in this resource file. |
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233 The function leaves if there is no matching resource.If the resource |
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234 id is greater than 4095, then the most significant 20 bits of the |
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235 resource id is treated as an offset and the least significant 12 bits |
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236 is treated as the real resource id. If the offset matches the offset |
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237 value defined for this file, then the resource is looked up in this |
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238 resource file using the real resource id (i.e. the least significant |
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239 12 bits). If the offset does not match, then the function leaves.Note, |
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240 do not call this function until a call to |
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241 ConfirmSignatureL() has completed successfully. |
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242 |
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243 @internalComponent |
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244 @pre OpenL() is called. |
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245 @param aResourceId The numeric id of the resource to be read. |
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246 @return Pointer to a heap buffer containing the resource. |
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247 @panic Some BAFL panic codes, if the file is corrupted. |
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248 @leave - The file is corrupted. |
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249 @leave - There is no resource with aResourceId in the file. |
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250 */ |
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251 Ptr8* RResourceFileImpl::AllocReadL(const TInt& aResourceId) |
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252 { |
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253 // Check if the resource id is present in the RSC file |
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254 if (!OwnsResourceId(aResourceId)) |
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255 { |
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256 std::ostringstream errDispStream; |
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257 |
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258 errDispStream<<"Resource ID:"; |
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259 errDispStream<<aResourceId; |
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260 errDispStream<<" is not present in the RSC file"; |
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261 |
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262 throw CResourceFileException(errDispStream.str()); |
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263 } |
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264 |
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265 //"-1" because the first resource has ID 0x*****001 (not 0x*****000) |
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266 TInt resourceIndex= (aResourceId & EIdBits)-1; |
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267 |
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268 if (iFlagsAndNumberOfResources & EFlagGenerate_RSS_SIGNATURE_ForFirstUserResource) |
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269 { |
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270 assert(iFlagsAndNumberOfResources & EFlagDictionaryCompressed); |
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271 assert(iFlagsAndNumberOfResources & EFlagThirdUidIsOffset); |
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272 |
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273 if (resourceIndex>0) |
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274 { |
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275 --resourceIndex; |
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276 } |
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277 else |
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278 { |
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279 assert(resourceIndex==0); |
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280 |
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281 Ptr8* resourceDataFor_RSS_SIGNATURE = new Ptr8(8); |
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282 if(NULL==resourceDataFor_RSS_SIGNATURE || NULL==resourceDataFor_RSS_SIGNATURE->GetPtr()) |
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283 { |
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284 std::string errMsg= "Failed : Error in Reading File. Memory Allocation Failed"; |
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285 throw CResourceFileException(errMsg); |
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286 } |
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287 |
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288 resourceDataFor_RSS_SIGNATURE->SetLength(8); |
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289 TUint* wordPointer=REINTERPRET_CAST(TUint*,CONST_CAST(TUint8*,resourceDataFor_RSS_SIGNATURE->GetPtr())); |
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290 |
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291 wordPointer[0]=4; |
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292 wordPointer[1]=((iExtra->iUidType[2].iUid << 12) | 1); |
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293 return resourceDataFor_RSS_SIGNATURE; |
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294 } |
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295 } |
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296 |
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297 |
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298 const TBool firstResourceIsGenerated= |
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299 (iFlagsAndNumberOfResources & |
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300 EFlagFirstResourceIsGeneratedBitArrayOfResourcesContainingCompressedUnicode); |
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301 if (firstResourceIsGenerated) |
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302 { |
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303 assert(iFlagsAndNumberOfResources & EFlagDictionaryCompressed); |
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304 //dictionary-compressed resource files can have an automatically generated |
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305 //resource which is the bit-array of resources containing compressed Unicode |
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306 //(this automatically generated resource does not have a corresponding bit for |
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307 //itself in the bit-array as it would be self-referring...) |
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308 ++resourceIndex; |
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309 } |
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310 |
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311 assert(resourceIndex>=0); |
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312 |
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313 Ptr8* const dictionaryDecompressedResourceData = DictionaryDecompressedResourceDataL(resourceIndex, |
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314 iFlagsAndNumberOfResources & static_cast<TUint>(EAllFlags), |
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315 iExtra->iDictionaryCompressionData, |
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316 iIndex); |
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317 |
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318 // Return the resource data if its not unicode compressed. |
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319 if (!iExtra->ContainsCompressedUnicode(resourceIndex,firstResourceIsGenerated)) |
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320 { |
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321 return dictionaryDecompressedResourceData; |
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322 } |
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323 |
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324 Ptr8* const finalResourceData=DecompressUnicodeL(dictionaryDecompressedResourceData); |
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325 |
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326 delete dictionaryDecompressedResourceData; |
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327 return finalResourceData; |
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328 |
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329 } |
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330 |
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331 /** The method will decompress the unicode data (aInputResourceData argument), allocate enough |
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332 memory from the heap for the decompressed data, copy the data there and return a buffer |
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333 to the decompressed data. |
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334 |
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335 The method doesn't own the allocated heap memory for the decompressed data. It's a caller |
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336 responsibility to deallocate the allocated memory. |
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337 |
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338 @internalComponent |
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339 @param aInputResourceData Compressed data. |
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340 @pre OpenL() is called. |
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341 @leave - The file is corrupted. |
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342 @leave - There is not enough memory for the decompressed data. |
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343 */ |
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344 Ptr8* RResourceFileImpl::DecompressUnicodeL(const Ptr8* aInputResourceData) const |
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345 { |
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346 const TInt numberOfBytesInInput= aInputResourceData->GetLength(); |
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347 assert(iSizeOfLargestResourceWhenCompletelyUncompressed>0); |
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348 |
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349 Ptr8* outputResourceData= new Ptr8(iSizeOfLargestResourceWhenCompletelyUncompressed); |
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350 if(NULL==outputResourceData || NULL==outputResourceData->GetPtr()) |
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351 { |
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352 std::string errMsg= "Failed : Error in Reading File. Memory Allocation Failed"; |
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353 throw CResourceFileException(errMsg); |
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354 } |
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355 |
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356 const TUint8* input= aInputResourceData->GetPtr(); |
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357 TInt index=0; |
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358 |
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359 TBool decompressRun=ETrue; |
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360 while (1) |
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361 { |
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362 assert(index<numberOfBytesInInput); |
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363 |
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364 TInt runLength=input[index]; |
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365 |
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366 // The run-length occupies a single byte if it is less than 128, |
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367 // otherwise it occupies two bytes (in little-endian byte order), |
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368 // with the most significant bit of the first byte set to non-zero |
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369 //to indicate that the run-length occupies two bytes. |
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370 if (runLength & 0x80) |
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371 { |
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372 ++index; |
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373 if (index>=numberOfBytesInInput) |
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374 { |
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375 std::string errMsg="Invalid Rsc File"; |
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376 throw CResourceFileException(errMsg); |
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377 } |
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378 runLength &= ~0x80; |
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379 runLength <<= 8; |
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380 runLength |= input[index]; |
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381 } |
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382 ++index; |
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383 if (runLength>0) |
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384 { |
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385 if (decompressRun) |
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386 { |
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387 AppendDecompressedUnicodeL( |
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388 outputResourceData, |
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389 const_cast<unsigned char *>(input+index), |
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390 runLength); |
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391 } |
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392 else |
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393 { |
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394 assert( |
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395 (outputResourceData->GetLength() + runLength) <= |
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396 iSizeOfLargestResourceWhenCompletelyUncompressed); |
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397 |
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398 memcpy((char*)(outputResourceData->GetPtr()+outputResourceData->GetLength()),(char*)(input+index),runLength); |
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399 outputResourceData->UpdateLength(runLength); |
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400 } |
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401 index+=runLength; |
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402 } |
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403 if (index>numberOfBytesInInput) |
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404 { |
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405 std::string errMsg="Invalid Rsc File"; |
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406 throw CResourceFileException(errMsg); |
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407 } |
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408 if (index>=numberOfBytesInInput) |
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409 { |
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410 break; |
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411 } |
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412 decompressRun=!decompressRun; |
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413 } |
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414 return outputResourceData; |
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415 } |
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416 |
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417 |
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418 /** @internalComponent |
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419 @return The first resource record. |
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420 @leave - The file is corrupted. |
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421 */ |
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422 RResourceFileImpl::SSigRecord RResourceFileImpl::FirstRecordL() const |
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423 { |
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424 // Added to support reading of rel 6.x resource files. |
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425 // rel 6.x files do not have signatures! |
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426 Ptr8* const firstResource=AllocReadL(1); |
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427 |
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428 // Basic check to test if the signature is of the correct size. |
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429 if (firstResource->GetLength()!= sizeof(SSigRecord)) |
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430 { |
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431 std::string errMsg="Invalid RSS Signature"; |
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432 throw CResourceFileException(errMsg); |
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433 } |
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434 SSigRecord sigRecord = *reinterpret_cast<const SSigRecord*>(firstResource->GetPtr()); |
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435 delete firstResource; |
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436 return sigRecord; |
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437 } |
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438 |
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439 /** Initialises the offset value from the first resource. |
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440 |
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441 The function tests to catch cases where the first resource is not an RSS_SIGNATURE. |
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442 It assumes that the first resource in the file consists of |
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443 two 32-bit integers. The first integer contains the version number and |
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444 the second is a self-referencing link whose value is the offset for |
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445 the resources in the file, plus 1.This function must be called before |
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446 calling Offset(), AllocReadL() or ReadL(). |
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447 |
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448 @internalComponent |
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449 @pre OpenL() is called. |
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450 @leave if the file is corrupted. |
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451 Some other error codes are possible too. |
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452 */ |
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453 void RResourceFileImpl::ConfirmSignatureL() |
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454 { |
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455 // Added to support reading of rel 6.x resource files. |
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456 SSigRecord firstRecord=FirstRecordL(); |
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457 |
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458 // If the resource offset does not correspond to the first resource |
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459 // this is not a resource signature. |
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460 if ((firstRecord.offset & EIdBits) != 1) |
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461 { |
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462 std::string errMsg="Failed : Invalid RSS Signature"; |
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463 throw CResourceFileException(errMsg); |
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464 } |
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465 iOffset=(firstRecord.offset & EOffsetBits); |
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466 } |
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467 |
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468 /** The method will decomress the unicode data (aCompressedUnicode argument) and append |
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469 the decompressed data to the end of aBuffer (aBuffer argument). |
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470 |
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471 @internalComponent |
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472 @pre OpenL() is called. |
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473 @param aBuffer Destination buffer. |
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474 @param aCompressedUnicode Compressed unicode buffer. |
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475 @leave - The file is corrupted. |
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476 */ |
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477 |
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478 void RResourceFileImpl::AppendDecompressedUnicodeL( |
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479 Ptr8* aBuffer, |
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480 const TUint8* aCompressedUnicode, |
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481 const TInt& aLengthOfCompressedUnicode) const |
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482 { |
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483 |
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484 if (aLengthOfCompressedUnicode>0) |
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485 { |
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486 TUint8* startOfDecompressedUnicode= aBuffer->GetPtr() + aBuffer->GetLength(); |
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487 |
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488 if (reinterpret_cast<TUint32>(startOfDecompressedUnicode) & 0x01) |
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489 { |
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490 TUint8 padChar = 0xab; |
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491 memcpy(startOfDecompressedUnicode,&padChar,1); |
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492 ++startOfDecompressedUnicode; |
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493 aBuffer->UpdateLength(1); |
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494 } |
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495 |
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496 const TInt maximumOutputLength= ( |
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497 iSizeOfLargestResourceWhenCompletelyUncompressed - (aBuffer->GetLength()))/2; |
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498 |
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499 TMemoryUnicodeSink decompressedUnicode(reinterpret_cast<TUint16*>(startOfDecompressedUnicode)); |
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500 |
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501 TInt lengthOfDecompressedUnicode; |
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502 TInt numberOfInputBytesConsumed; |
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503 TUnicodeExpander unicodeExpander; |
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504 |
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505 unicodeExpander.ExpandL(decompressedUnicode, |
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506 aCompressedUnicode, |
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507 maximumOutputLength, |
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508 aLengthOfCompressedUnicode, |
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509 &lengthOfDecompressedUnicode, |
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510 &numberOfInputBytesConsumed); |
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511 TInt temp; |
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512 unicodeExpander.FlushL(decompressedUnicode,maximumOutputLength,temp); |
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513 lengthOfDecompressedUnicode+=temp; |
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514 aBuffer->UpdateLength(lengthOfDecompressedUnicode*2); |
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515 |
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516 assert(numberOfInputBytesConsumed == aLengthOfCompressedUnicode); |
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517 } |
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518 } |
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519 |
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520 /** Tests whether the resource file owns the specified resource id. |
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521 |
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522 The resource file owns the resource id if the most significant 20 bits |
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523 of the resource id are zero or match the offset value as returned from |
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524 a call to the Offset() member function or if the resource id is not out of range. |
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525 |
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526 @internalComponent |
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527 @pre OpenL() is called. |
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528 @param aResourceId The resource id to test. |
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529 @return True, if the resource file owns the id, false otherwise. |
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530 @leave - The file is corrupted. |
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531 */ |
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532 |
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533 TBool RResourceFileImpl::OwnsResourceId(const TInt& aResourceId) const |
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534 { |
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535 // Checks whether Rsc file owns the resource: |
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536 // does so if offset is 0, or matches that given, |
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537 // and id is in index. |
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538 |
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539 const TInt offset=(aResourceId & EOffsetBits); |
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540 // if ((offset!=0) && (offset!=iOffset)) |
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541 // { |
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542 // return EFalse; |
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543 // } |
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544 |
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545 const TInt resourceIndex=(aResourceId & EIdBits)-1; |
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546 TInt numberOfResources=(iFlagsAndNumberOfResources & ~EAllFlags); |
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547 if (iFlagsAndNumberOfResources & EFlagGenerate_RSS_SIGNATURE_ForFirstUserResource) |
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548 { |
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549 assert(iFlagsAndNumberOfResources & EFlagDictionaryCompressed); |
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550 assert(iFlagsAndNumberOfResources & EFlagThirdUidIsOffset); |
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551 ++numberOfResources; |
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552 } |
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553 if (iFlagsAndNumberOfResources & |
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554 EFlagFirstResourceIsGeneratedBitArrayOfResourcesContainingCompressedUnicode) |
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555 { |
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556 assert(iFlagsAndNumberOfResources & EFlagDictionaryCompressed); |
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557 --numberOfResources; |
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558 } |
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559 return (resourceIndex >= 0) && (resourceIndex < numberOfResources); |
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560 } |
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561 |
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562 TInt RResourceFileImpl::ReadL( |
|
563 const TUint32& aFlags, |
|
564 TInt aPos, |
|
565 TUint8* aData, |
|
566 const TInt& aLength) |
|
567 { |
|
568 aPos += iExtra->iFileOffset; |
|
569 |
|
570 assert(aPos >= iExtra->iFileOffset); |
|
571 assert(aLength >= 0); |
|
572 assert((aPos + aLength) <= (iExtra->iFileOffset + iExtra->iFileSize)); |
|
573 |
|
574 // Seek to the offset specified by "aPos" |
|
575 iResourceContents->seekg(aPos, std::ios_base::beg); |
|
576 iResourceContents->read((char*)aData, aLength); |
|
577 return iResourceContents->gcount(); |
|
578 } |
|
579 |
|
580 |
|
581 TInt RResourceFileImpl::ReadL(TInt aPos, TUint8* aData, const TInt& aLength) |
|
582 { |
|
583 return ReadL(iFlagsAndNumberOfResources & static_cast<TUint32>(EAllFlags),aPos,aData,aLength); |
|
584 } |
|
585 |
|
586 |
|
587 TInt RResourceFileImpl::LittleEndianTwoByteInteger( |
|
588 const TUint8* aBuffer, |
|
589 const TInt& aIndexOfFirstByte, TInt aLength) const |
|
590 { |
|
591 assert((aIndexOfFirstByte + 1) < aLength); |
|
592 return aBuffer[aIndexOfFirstByte] | (aBuffer[aIndexOfFirstByte+1]<<8); |
|
593 } |
|
594 |
|
595 |
|
596 /** Function to retrieve the header information of the rsc file and all the |
|
597 resource index information in the rsc file. This function is created to |
|
598 handle the common functionality in the two OpenL() method. |
|
599 @internalComponent |
|
600 @pre OpenL() is called. |
|
601 */ |
|
602 |
|
603 void RResourceFileImpl::ReadHeaderAndResourceIndexL() |
|
604 { |
|
605 SDictionaryCompressionData dictionaryCompressionData; |
|
606 |
|
607 TUidType uidType; |
|
608 TInt length =0; |
|
609 //dictionary-compressed resource files have a 21-byte header, |
|
610 //16 bytes of checked UIDs followed by a 1-byte field and two 2-byte fields |
|
611 TUint8 header[21]; |
|
612 if(iExtra->iFileSize >= 16) |
|
613 { |
|
614 length = ReadL(0,header,Min((sizeof(header)/sizeof(header[0])),iExtra->iFileSize)); |
|
615 uidType=TCheckedUid(header, 16).UidType(); |
|
616 |
|
617 if (uidType[0].iUid==0x101f4a6b) |
|
618 { |
|
619 iFlagsAndNumberOfResources |= EFlagPotentiallyContainsCompressedUnicode; |
|
620 assert(length >= 18); |
|
621 iSizeOfLargestResourceWhenCompletelyUncompressed = LittleEndianTwoByteInteger(header,16+1,length); |
|
622 } |
|
623 else if (uidType[0].iUid==0x101f5010) |
|
624 { |
|
625 iFlagsAndNumberOfResources |= |
|
626 EFlagPotentiallyContainsCompressedUnicode | EFlagDictionaryCompressed; |
|
627 assert(length >= 18); |
|
628 iSizeOfLargestResourceWhenCompletelyUncompressed = LittleEndianTwoByteInteger(header,16+1,length); |
|
629 } |
|
630 else if (uidType[0]!=TUid::Null()) |
|
631 { |
|
632 std::string errMsg="Failed : Not Supported. Invalid Registration File."; |
|
633 throw CResourceFileException(errMsg); |
|
634 } |
|
635 //the "signature" of Calypso's resource files |
|
636 else if (LittleEndianTwoByteInteger(header,0,length)==4) |
|
637 { |
|
638 iFlagsAndNumberOfResources |= EFlagDictionaryCompressed | EFlagCalypsoFileFormat; |
|
639 iSizeOfLargestResourceWhenCompletelyUncompressed = LittleEndianTwoByteInteger(header,8,length); |
|
640 } |
|
641 } |
|
642 |
|
643 //It seems that the following AssertDebL() call never fails, |
|
644 //because LittleEndianTwoByteIntegerL always |
|
645 //returns zero or positive value. |
|
646 assert(iSizeOfLargestResourceWhenCompletelyUncompressed>=0); |
|
647 TInt numberOfResources=0; |
|
648 Ptr8* bitArrayOfResourcesContainingCompressedUnicode=NULL; |
|
649 if (iFlagsAndNumberOfResources & EFlagDictionaryCompressed) |
|
650 { |
|
651 if (iFlagsAndNumberOfResources & EFlagCalypsoFileFormat) |
|
652 { |
|
653 assert(length > 10); |
|
654 numberOfResources=LittleEndianTwoByteInteger(header,2,length); |
|
655 const TInt numberOfBitsUsedForDictionaryTokens = header[10]; |
|
656 const TInt numberOfDictionaryEntries = |
|
657 (1 << numberOfBitsUsedForDictionaryTokens) - header[5]; |
|
658 assert(numberOfDictionaryEntries >= 0); |
|
659 // "+2" because the first entry in the dictionary-index in this file format |
|
660 //is the number of bits from the start of the dictionary data to the start |
|
661 //of the first dictionary entry which is always zero, and thus unnecessary |
|
662 const TInt startOfDictionaryData=4+7+2; |
|
663 // "+2" because the first entry in the resource-index in this file format is |
|
664 //the number of bits from the start of the resource data to the start of the |
|
665 //first resource which is always zero, and thus unnecessary |
|
666 const TInt startOfResourceIndex=LittleEndianTwoByteInteger(header,6,length)+2; |
|
667 assert(startOfResourceIndex >= 0); |
|
668 dictionaryCompressionData.iStartOfDictionaryData= |
|
669 startOfDictionaryData+(numberOfDictionaryEntries*2); |
|
670 dictionaryCompressionData.iStartOfDictionaryIndex=startOfDictionaryData; |
|
671 dictionaryCompressionData.iNumberOfDictionaryEntries=numberOfDictionaryEntries; |
|
672 dictionaryCompressionData.iStartOfResourceData= |
|
673 startOfResourceIndex+(numberOfResources*2); |
|
674 dictionaryCompressionData.iStartOfResourceIndex=startOfResourceIndex; |
|
675 dictionaryCompressionData.iNumberOfBitsUsedForDictionaryTokens= |
|
676 numberOfBitsUsedForDictionaryTokens; |
|
677 |
|
678 if ((iFlagsAndNumberOfResources & static_cast<TUint>(EFlagIsRomFile)) == 0) |
|
679 { |
|
680 // attempt to cache dictionary index |
|
681 // allocate and populate the dictionary index buffer |
|
682 dictionaryCompressionData.iCachedDictionaryIndex = new TUint16[numberOfDictionaryEntries]; |
|
683 if (dictionaryCompressionData.iCachedDictionaryIndex != 0) |
|
684 { |
|
685 TInt len = numberOfDictionaryEntries * 2; |
|
686 |
|
687 Ptr8* ptr8 = new Ptr8(numberOfDictionaryEntries * 2); |
|
688 if(NULL==ptr8 || NULL==ptr8->GetPtr()) |
|
689 { |
|
690 std::string errMsg= "Failed : Error in Reading File. Memory Allocation Failed"; |
|
691 throw CResourceFileException(errMsg); |
|
692 } |
|
693 ptr8->UpdateLength(numberOfDictionaryEntries * 2); |
|
694 ReadL( |
|
695 iFlagsAndNumberOfResources & static_cast<TUint>(EAllFlags), // aFlags |
|
696 startOfDictionaryData, // aPos |
|
697 (TUint8*)ptr8->GetPtr(), |
|
698 len); // aLength |
|
699 |
|
700 memcpy((TUint8*)dictionaryCompressionData.iCachedDictionaryIndex, ptr8->GetPtr(), len); |
|
701 if(NULL != ptr8) |
|
702 { |
|
703 delete ptr8; |
|
704 } |
|
705 } |
|
706 } // if (iFlagsAndNumberOfResources & EFlagIsRomFile) |
|
707 } |
|
708 else |
|
709 { |
|
710 assert(length==16+1+2+2); |
|
711 const TUint firstByteAfterUids=header[16]; |
|
712 if (firstByteAfterUids & 0x80) |
|
713 { |
|
714 // this flag is only set if the resource file is dictionary-compressed |
|
715 iFlagsAndNumberOfResources |= EFlagThirdUidIsOffset; |
|
716 } |
|
717 if (firstByteAfterUids & 0x40) |
|
718 { |
|
719 // this flag is only set if the resource file is dictionary-compressed |
|
720 iFlagsAndNumberOfResources |= EFlagGenerate_RSS_SIGNATURE_ForFirstUserResource; |
|
721 } |
|
722 if (firstByteAfterUids & 0x20) |
|
723 { |
|
724 iFlagsAndNumberOfResources |= |
|
725 EFlagFirstResourceIsGeneratedBitArrayOfResourcesContainingCompressedUnicode; |
|
726 } |
|
727 dictionaryCompressionData.iStartOfResourceData = LittleEndianTwoByteInteger(header,16+1+2,length); |
|
728 TUint8 temp[2]; |
|
729 length = ReadL((iExtra->iFileSize)-2,temp,2); |
|
730 |
|
731 const TInt numberOfBitsOfResourceData = LittleEndianTwoByteInteger(temp,0,length); |
|
732 dictionaryCompressionData.iStartOfResourceIndex= |
|
733 dictionaryCompressionData.iStartOfResourceData+ |
|
734 ((numberOfBitsOfResourceData+7)/8); |
|
735 numberOfResources=(iExtra->iFileSize-dictionaryCompressionData.iStartOfResourceIndex)/2; |
|
736 dictionaryCompressionData.iStartOfDictionaryData=16+5; |
|
737 if ((numberOfResources>0) && |
|
738 !(iFlagsAndNumberOfResources & |
|
739 EFlagFirstResourceIsGeneratedBitArrayOfResourcesContainingCompressedUnicode)) |
|
740 { |
|
741 const TInt lengthOfBitArrayInBytes=(numberOfResources+7)/8; |
|
742 bitArrayOfResourcesContainingCompressedUnicode= new Ptr8(lengthOfBitArrayInBytes); |
|
743 if(NULL==bitArrayOfResourcesContainingCompressedUnicode || NULL==bitArrayOfResourcesContainingCompressedUnicode->GetPtr()) |
|
744 { |
|
745 std::string errMsg= "Failed : Error in Reading File. Memory Allocation Failed"; |
|
746 throw CResourceFileException(errMsg); |
|
747 } |
|
748 bitArrayOfResourcesContainingCompressedUnicode->UpdateLength(lengthOfBitArrayInBytes); |
|
749 TUint8* asWritable = bitArrayOfResourcesContainingCompressedUnicode->GetPtr(); |
|
750 ReadL(16+5,asWritable,lengthOfBitArrayInBytes); |
|
751 dictionaryCompressionData.iStartOfDictionaryData+=lengthOfBitArrayInBytes; |
|
752 } |
|
753 length = ReadL(dictionaryCompressionData.iStartOfResourceData-2,temp,2); |
|
754 const TInt numberOfBitsOfDictionaryData=LittleEndianTwoByteInteger(temp,0,length); |
|
755 dictionaryCompressionData.iStartOfDictionaryIndex= |
|
756 dictionaryCompressionData.iStartOfDictionaryData+ |
|
757 ((numberOfBitsOfDictionaryData+7)/8); |
|
758 dictionaryCompressionData.iNumberOfDictionaryEntries= |
|
759 (dictionaryCompressionData.iStartOfResourceData- |
|
760 dictionaryCompressionData.iStartOfDictionaryIndex)/2; |
|
761 //the bottom 3 bits of firstByteAfterUids stores the number of bits used for |
|
762 //dictionary tokens as an offset from 3, e.g. if 2 is stored in these three bits |
|
763 //then the number of bits per dictionary token would be 3+2=5 - this allows a |
|
764 //range of 3-11 bits per dictionary token (the maximum number of dictionary |
|
765 //tokens therefore ranging from 8-2048) - the spec currently only supports 5-9 |
|
766 //bits per dictionary token, however |
|
767 dictionaryCompressionData.iNumberOfBitsUsedForDictionaryTokens= |
|
768 3 + (firstByteAfterUids & 0x07); |
|
769 if ((numberOfResources>0) && |
|
770 (iFlagsAndNumberOfResources & |
|
771 EFlagFirstResourceIsGeneratedBitArrayOfResourcesContainingCompressedUnicode)) |
|
772 { |
|
773 Ptr16* nulldesc = new Ptr16(1); |
|
774 if(NULL==nulldesc || NULL==nulldesc->GetPtr()) |
|
775 { |
|
776 std::string errMsg= "Failed : Error in Reading File. Memory Allocation Failed"; |
|
777 throw CResourceFileException(errMsg); |
|
778 } |
|
779 *(nulldesc->GetPtr()) = 0; |
|
780 nulldesc->UpdateLength(0); |
|
781 |
|
782 bitArrayOfResourcesContainingCompressedUnicode= |
|
783 DictionaryDecompressedResourceDataL( |
|
784 0, |
|
785 iFlagsAndNumberOfResources & static_cast<TUint>(EAllFlags), |
|
786 dictionaryCompressionData, |
|
787 nulldesc); |
|
788 if(NULL != nulldesc) |
|
789 { |
|
790 delete nulldesc; |
|
791 } |
|
792 } |
|
793 } |
|
794 } |
|
795 else |
|
796 { |
|
797 assert((iExtra->iFileSize + iExtra->iFileOffset) > 2); |
|
798 // This format of resource file is likely to be used for non-ROM resource files, |
|
799 //so cache the resource-index (in iIndex) to minimize disk access. |
|
800 // Ignore the flags in non-dictionary-compressed resource files - they are to |
|
801 //be used only by a dictionary-compressing program. |
|
802 const TInt KMaximumNumberOfBytesCached=256; |
|
803 TUint8 cache[KMaximumNumberOfBytesCached]; |
|
804 const TInt numberOfBytesCached=Min(iExtra->iFileSize,KMaximumNumberOfBytesCached); |
|
805 TInt len = ReadL(iExtra->iFileSize-numberOfBytesCached,cache,numberOfBytesCached); |
|
806 assert(len==numberOfBytesCached); |
|
807 const TInt positionOfStartOfIndex= |
|
808 ((cache[numberOfBytesCached-1]<<8) | cache[numberOfBytesCached-2]); |
|
809 const TInt numberOfBytesOfIndex=iExtra->iFileSize-positionOfStartOfIndex; |
|
810 assert(numberOfBytesOfIndex%2==0); |
|
811 assert(numberOfBytesOfIndex>=0); |
|
812 const TInt numberOfBytesOfIndexStillToRetrieve= |
|
813 numberOfBytesOfIndex-numberOfBytesCached; |
|
814 if (numberOfBytesOfIndexStillToRetrieve<=0) |
|
815 { |
|
816 Ptr8* indexAsBinaryBuffer = new Ptr8(numberOfBytesOfIndex); |
|
817 if(NULL==indexAsBinaryBuffer || NULL==indexAsBinaryBuffer->GetPtr()) |
|
818 { |
|
819 std::string errMsg= "Failed : Error in Reading File. Memory Allocation Failed"; |
|
820 throw CResourceFileException(errMsg); |
|
821 } |
|
822 |
|
823 indexAsBinaryBuffer->UpdateLength(numberOfBytesOfIndex); |
|
824 BufCpy8(indexAsBinaryBuffer->GetPtr(), cache+(numberOfBytesCached - numberOfBytesOfIndex) , numberOfBytesOfIndex); |
|
825 |
|
826 iIndex = new Ptr16(numberOfBytesOfIndex/2); |
|
827 if(NULL==iIndex || NULL==iIndex->GetPtr()) |
|
828 { |
|
829 std::string errMsg= "Failed : Error in Reading File. Memory Allocation Failed"; |
|
830 throw CResourceFileException(errMsg); |
|
831 } |
|
832 |
|
833 MemCopy(CONST_CAST(TUint16*,(TUint16*)iIndex->GetPtr()),indexAsBinaryBuffer->GetPtr(),numberOfBytesOfIndex); |
|
834 iIndex->UpdateLength(numberOfBytesOfIndex/2); |
|
835 |
|
836 if(NULL != indexAsBinaryBuffer) |
|
837 { |
|
838 delete indexAsBinaryBuffer; |
|
839 } |
|
840 } |
|
841 else |
|
842 { |
|
843 Ptr16* const index=new Ptr16(numberOfBytesOfIndex/2); |
|
844 if(NULL==index || NULL==index->GetPtr()) |
|
845 { |
|
846 std::string errMsg= "Failed : Error in Reading File. Memory Allocation Failed"; |
|
847 throw CResourceFileException(errMsg); |
|
848 } |
|
849 index->UpdateLength(numberOfBytesOfIndex/2); |
|
850 |
|
851 Ptr8* indexAsWritableBinaryBuffer = new Ptr8(numberOfBytesOfIndex); |
|
852 if(NULL==indexAsWritableBinaryBuffer || NULL==indexAsWritableBinaryBuffer->GetPtr()) |
|
853 { |
|
854 std::string errMsg= "Failed : Error in Reading File. Memory Allocation Failed"; |
|
855 throw CResourceFileException(errMsg); |
|
856 } |
|
857 indexAsWritableBinaryBuffer->UpdateLength(numberOfBytesOfIndexStillToRetrieve); |
|
858 |
|
859 ReadL(positionOfStartOfIndex,indexAsWritableBinaryBuffer->GetPtr(), |
|
860 numberOfBytesOfIndexStillToRetrieve); |
|
861 assert(indexAsWritableBinaryBuffer->GetLength()==numberOfBytesOfIndexStillToRetrieve); |
|
862 indexAsWritableBinaryBuffer->Append(cache, len); |
|
863 indexAsWritableBinaryBuffer->UpdateLength(len); |
|
864 assert(indexAsWritableBinaryBuffer->GetLength()==numberOfBytesOfIndex); |
|
865 assert(indexAsWritableBinaryBuffer->GetLength()==index->GetLength()*2); |
|
866 memcpy((TUint8*)index->GetPtr(), indexAsWritableBinaryBuffer->GetPtr() , numberOfBytesOfIndex); |
|
867 |
|
868 iIndex=index; |
|
869 if(NULL != indexAsWritableBinaryBuffer) |
|
870 { |
|
871 delete indexAsWritableBinaryBuffer; |
|
872 } |
|
873 } |
|
874 |
|
875 //"-1" because the last thing in the index (which is in fact the last thing in the |
|
876 //file itself) is the position of the start of the index which is therefore not |
|
877 //pointing to a resource |
|
878 numberOfResources=(numberOfBytesOfIndex/2) - 1; |
|
879 if ((numberOfResources>0) && |
|
880 (iFlagsAndNumberOfResources & EFlagPotentiallyContainsCompressedUnicode)) |
|
881 { |
|
882 const TInt lengthOfBitArrayInBytes=(numberOfResources+7)/8; |
|
883 bitArrayOfResourcesContainingCompressedUnicode= new Ptr8(lengthOfBitArrayInBytes); |
|
884 if(NULL==bitArrayOfResourcesContainingCompressedUnicode || NULL==bitArrayOfResourcesContainingCompressedUnicode->GetPtr()) |
|
885 { |
|
886 std::string errMsg= "Failed : Error in Reading File. Memory Allocation Failed"; |
|
887 throw CResourceFileException(errMsg); |
|
888 } |
|
889 bitArrayOfResourcesContainingCompressedUnicode->UpdateLength(lengthOfBitArrayInBytes); |
|
890 TUint8* bitArray = bitArrayOfResourcesContainingCompressedUnicode->GetPtr(); |
|
891 //"16+1+2": 16 bytes of checked-UID + 1 byte of flags (these flags are for a |
|
892 //dictionary-compressing program's use rather than directly for Bafl's use, |
|
893 //so we ignore them) + 2 bytes containing the size of the largest resource when |
|
894 //uncompressed |
|
895 ReadL(16+1+2,bitArray,lengthOfBitArrayInBytes); |
|
896 } |
|
897 } |
|
898 assert((numberOfResources & EAllFlags)==0); |
|
899 assert((iFlagsAndNumberOfResources & ~EAllFlags)==0); |
|
900 iFlagsAndNumberOfResources |= (numberOfResources & ~EAllFlags); |
|
901 iExtra->iUidType = uidType; |
|
902 iExtra->iBitArrayOfResourcesContainingCompressedUnicode = bitArrayOfResourcesContainingCompressedUnicode; |
|
903 iExtra->iBitArrayOfResourcesContainingCompressedUnicode->SetLength(bitArrayOfResourcesContainingCompressedUnicode->GetLength()); |
|
904 iExtra->iDictionaryCompressionData = dictionaryCompressionData; |
|
905 //iOffset is set by calling ConfirmSignatureL |
|
906 assert(iOffset==0); |
|
907 } |
|
908 |
|
909 |
|
910 /** @internalComponent |
|
911 @pre OpenL() is called. |
|
912 @leave KErrCorrupt The file is corrupted. |
|
913 @leave KErrNoMemory There is not enough memory for the decompressed data. |
|
914 Some other error codes are possible too. |
|
915 */ |
|
916 Ptr8* RResourceFileImpl::DictionaryDecompressedResourceDataL( |
|
917 TInt aResourceIndex, |
|
918 TUint aFlags, |
|
919 const SDictionaryCompressionData& aDictionaryCompressionData, |
|
920 const Ptr16* aIndex) const |
|
921 { |
|
922 if (aFlags & EFlagDictionaryCompressed) |
|
923 { |
|
924 assert(iSizeOfLargestResourceWhenCompletelyUncompressed>0); |
|
925 Ptr8* const outputResourceData = new Ptr8(iSizeOfLargestResourceWhenCompletelyUncompressed); |
|
926 if(NULL==outputResourceData || NULL==outputResourceData->GetPtr()) |
|
927 { |
|
928 std::string errMsg= "Failed : Error in Reading File. Memory Allocation Failed"; |
|
929 throw CResourceFileException(errMsg); |
|
930 } |
|
931 |
|
932 Ptr8* asWritable = outputResourceData; |
|
933 std::vector<RDictionaryCompressionBitStream> stackOfDictionaryCompressionBitStreams; |
|
934 AppendDictionaryCompressionBitStreamL( |
|
935 stackOfDictionaryCompressionBitStreams, |
|
936 aFlags, |
|
937 aDictionaryCompressionData, |
|
938 aDictionaryCompressionData.iStartOfResourceData, |
|
939 aDictionaryCompressionData.iStartOfResourceIndex, |
|
940 aResourceIndex); |
|
941 const TBool calypsoFileFormat=(aFlags & EFlagCalypsoFileFormat); |
|
942 while(1) |
|
943 { |
|
944 const TInt indexOfTopBitStream=stackOfDictionaryCompressionBitStreams.size()-1; |
|
945 assert(indexOfTopBitStream>=-1); |
|
946 if (indexOfTopBitStream<0) |
|
947 { |
|
948 break; |
|
949 } |
|
950 RDictionaryCompressionBitStream& dictionaryCompressionBitStream= |
|
951 stackOfDictionaryCompressionBitStreams[indexOfTopBitStream]; |
|
952 |
|
953 while(1) |
|
954 { |
|
955 if (dictionaryCompressionBitStream.EndOfStreamL()) |
|
956 { |
|
957 dictionaryCompressionBitStream.Close(); |
|
958 stackOfDictionaryCompressionBitStreams.erase(indexOfTopBitStream); |
|
959 break; |
|
960 } |
|
961 const TInt indexOfDictionaryEntry= |
|
962 dictionaryCompressionBitStream.IndexOfDictionaryEntryL(); |
|
963 if (indexOfDictionaryEntry<0) |
|
964 { |
|
965 dictionaryCompressionBitStream.ReadL(asWritable,calypsoFileFormat); |
|
966 } |
|
967 else |
|
968 { |
|
969 AppendDictionaryCompressionBitStreamL( |
|
970 stackOfDictionaryCompressionBitStreams, |
|
971 aFlags, |
|
972 aDictionaryCompressionData, |
|
973 aDictionaryCompressionData.iStartOfDictionaryData, |
|
974 aDictionaryCompressionData.iStartOfDictionaryIndex, |
|
975 indexOfDictionaryEntry); |
|
976 break; |
|
977 } |
|
978 } |
|
979 } |
|
980 stackOfDictionaryCompressionBitStreams.clear(); |
|
981 return outputResourceData; |
|
982 } |
|
983 |
|
984 assert(aResourceIndex < aIndex->GetLength()); |
|
985 |
|
986 const TInt positionOfResourceData=(*aIndex)[aResourceIndex]; |
|
987 const TInt numberOfBytes=(*aIndex)[aResourceIndex+1]-positionOfResourceData; |
|
988 |
|
989 assert(numberOfBytes >= 0); |
|
990 Ptr8* const outputResourceData= new Ptr8(numberOfBytes); |
|
991 if(NULL==outputResourceData || NULL==outputResourceData->GetPtr()) |
|
992 { |
|
993 std::string errMsg= "Failed : Error in Reading File. Memory Allocation Failed"; |
|
994 throw CResourceFileException(errMsg); |
|
995 } |
|
996 |
|
997 TUint8* asWritable = outputResourceData->GetPtr(); |
|
998 ReadL(aFlags,positionOfResourceData,asWritable,numberOfBytes); |
|
999 outputResourceData->UpdateLength(numberOfBytes); |
|
1000 |
|
1001 return outputResourceData; |
|
1002 |
|
1003 } |
|
1004 |
|
1005 |
|
1006 void RResourceFileImpl::AppendDictionaryCompressionBitStreamL( |
|
1007 std::vector<RDictionaryCompressionBitStream>& aStackOfDictionaryCompressionBitStreams, |
|
1008 TUint aFlags, |
|
1009 const SDictionaryCompressionData& aDictionaryCompressionData, |
|
1010 TInt aStartOfBitData, |
|
1011 TInt aStartOfIndex, |
|
1012 TInt aIndexEntry) const |
|
1013 { |
|
1014 const TBool isRomFile=(aFlags & static_cast<TUint>(EFlagIsRomFile)); |
|
1015 TUint8 temp[4]; |
|
1016 TInt length = 0; |
|
1017 assert(aIndexEntry>=0); |
|
1018 TInt offsetToFirstBit; |
|
1019 TInt offsetOnePastLastBit; |
|
1020 if ( aDictionaryCompressionData.iStartOfDictionaryIndex == aStartOfIndex |
|
1021 && aDictionaryCompressionData.iCachedDictionaryIndex != 0) |
|
1022 { |
|
1023 assert(!isRomFile); |
|
1024 // indices start at 1 |
|
1025 offsetToFirstBit = (aIndexEntry <= 0) |
|
1026 ? 0 |
|
1027 : aDictionaryCompressionData.iCachedDictionaryIndex[aIndexEntry-1]; |
|
1028 offsetOnePastLastBit = aDictionaryCompressionData.iCachedDictionaryIndex[aIndexEntry]; |
|
1029 } |
|
1030 else |
|
1031 { |
|
1032 TInt len = ReadL(aFlags,aStartOfIndex+((aIndexEntry-1)*2),temp,4); |
|
1033 offsetToFirstBit=(aIndexEntry > 0) ? LittleEndianTwoByteInteger(temp,0,len) : 0; |
|
1034 offsetOnePastLastBit=LittleEndianTwoByteInteger(temp,2,len); |
|
1035 } |
|
1036 TInt rsc_file_size = iExtra->iFileOffset + iExtra->iFileSize; |
|
1037 TInt offset_first = offsetToFirstBit / 8 + iExtra->iFileOffset; |
|
1038 assert(offset_first < rsc_file_size); |
|
1039 TInt offset_last = offsetOnePastLastBit / 8 + iExtra->iFileOffset; |
|
1040 assert(offset_last <= rsc_file_size); |
|
1041 TUint8* buffer = NULL; |
|
1042 TInt start_pos = 0; |
|
1043 if (isRomFile) |
|
1044 { |
|
1045 TInt startOfBitData = aStartOfBitData + iExtra->iFileOffset; |
|
1046 assert(startOfBitData < rsc_file_size); |
|
1047 buffer = startOfBitData; |
|
1048 } |
|
1049 else |
|
1050 { |
|
1051 const TInt offsetToByteContainingFirstBit=offsetToFirstBit/8; |
|
1052 const TInt offsetToOnePastByteContainingLastBit=((offsetOnePastLastBit-1)/8)+1; |
|
1053 const TInt numberOfBytesToLoad= |
|
1054 offsetToOnePastByteContainingLastBit-offsetToByteContainingFirstBit; |
|
1055 assert(numberOfBytesToLoad >= 0); |
|
1056 buffer=new TUint8[numberOfBytesToLoad]; |
|
1057 if(NULL==buffer) |
|
1058 { |
|
1059 std::string errMsg= "Failed : Error in Reading File. Memory Allocation Failed"; |
|
1060 throw CResourceFileException(errMsg); |
|
1061 } |
|
1062 |
|
1063 if( iExtra->iDictionaryCompressionData.iCachedResourceBuffer == 0) |
|
1064 { |
|
1065 iExtra->iDictionaryCompressionData.iCachedResourceBuffer=new TUint8[rsc_file_size]; // reserver buffer for whole file |
|
1066 if(NULL==iExtra->iDictionaryCompressionData.iCachedResourceBuffer) |
|
1067 { |
|
1068 delete buffer; // buffer deleted in RDictionaryCompressionBitStream::close |
|
1069 std::string errMsg= "Failed : Error in Reading File. Memory Allocation Failed"; |
|
1070 throw CResourceFileException(errMsg); |
|
1071 } |
|
1072 |
|
1073 Ptr8* JKasWritable = new Ptr8(rsc_file_size); |
|
1074 if(NULL==JKasWritable || NULL == JKasWritable->GetPtr()) |
|
1075 { |
|
1076 delete buffer; // buffer deleted in RDictionaryCompressionBitStream::close |
|
1077 std::string errMsg= "Failed : Error in Reading File. Memory Allocation Failed"; |
|
1078 throw CResourceFileException(errMsg); |
|
1079 } |
|
1080 JKasWritable->UpdateLength(rsc_file_size); |
|
1081 |
|
1082 try { |
|
1083 length = ReadL(0,(TUint8*)JKasWritable->GetPtr(), rsc_file_size); |
|
1084 } |
|
1085 catch(...) |
|
1086 { |
|
1087 delete buffer; // buffer deleted in RDictionaryCompressionBitStream::close |
|
1088 std::string errMsg= "Failed : Error in Reading File."; |
|
1089 throw CResourceFileException(errMsg); |
|
1090 } |
|
1091 |
|
1092 BufCpy8(iExtra->iDictionaryCompressionData.iCachedResourceBuffer, JKasWritable->GetPtr(), length); |
|
1093 if(NULL != JKasWritable) |
|
1094 { |
|
1095 delete JKasWritable; |
|
1096 } |
|
1097 } |
|
1098 start_pos = aStartOfBitData + offsetToByteContainingFirstBit + iExtra->iFileOffset; |
|
1099 assert(start_pos < rsc_file_size); |
|
1100 assert((start_pos + numberOfBytesToLoad) <= rsc_file_size); |
|
1101 const TInt numberOfBitsFromStartOfBitDataToFirstLoadedByte= |
|
1102 offsetToByteContainingFirstBit*8; |
|
1103 offsetToFirstBit-=numberOfBitsFromStartOfBitDataToFirstLoadedByte; |
|
1104 offsetOnePastLastBit-=numberOfBitsFromStartOfBitDataToFirstLoadedByte; |
|
1105 |
|
1106 MemCopy( buffer, iExtra->iDictionaryCompressionData.iCachedResourceBuffer + start_pos, numberOfBytesToLoad); |
|
1107 } |
|
1108 RDictionaryCompressionBitStream stream; |
|
1109 stream.OpenL( |
|
1110 aDictionaryCompressionData.iNumberOfBitsUsedForDictionaryTokens, |
|
1111 offsetToFirstBit, |
|
1112 offsetOnePastLastBit, |
|
1113 !isRomFile, |
|
1114 buffer); |
|
1115 try { |
|
1116 aStackOfDictionaryCompressionBitStreams.push_back(stream); |
|
1117 } |
|
1118 catch(...) |
|
1119 { |
|
1120 delete buffer; // buffer deleted in RDictionaryCompressionBitStream::close |
|
1121 std::string errMsg= "Failed : Error in Reading File."; |
|
1122 throw CResourceFileException(errMsg); |
|
1123 } |
|
1124 if (!isRomFile) |
|
1125 { |
|
1126 delete buffer; // buffer deleted in RDictionaryCompressionBitStream::close |
|
1127 } |
|
1128 } |
|
1129 |