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1 // Copyright (c) 1995-2009 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 the License "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 // f32\sfile\sf_pgcompr.cpp |
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15 // |
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16 // |
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17 |
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18 #include <f32file.h> |
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19 #include "sf_std.h" |
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20 #include "sf_ldr.h" |
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21 #include <f32image.h> |
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22 #include "sf_image.h" |
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23 #include <e32uid.h> |
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24 #include <e32rom.h> |
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25 #include "sf_cache.h" |
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26 |
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27 #include "sf_pgcompr.h" |
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28 |
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29 extern TInt BytePairDecompress(TUint8* /*dst*/, TInt /*dstSize*/, TUint8* /*src*/, TInt /*srcSize*/, TUint8*& /*srcNext*/); |
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30 |
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31 |
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32 // CBytePairReader - reading from in-memory buffer |
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33 |
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34 |
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35 CBytePairReader* CBytePairReader::NewLC(TUint8* aBuffer, TUint32 aLength) |
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36 { |
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37 CBytePairReader* reader = new (ELeave) CBytePairReader(aBuffer, aLength); |
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38 CleanupStack::PushL(reader); |
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39 return reader; |
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40 } |
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41 |
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42 |
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43 CBytePairReader::CBytePairReader(TUint8* aBuffer, TUint32 aLength) |
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44 : iNextPage(aBuffer), iBytesLeft(aLength) |
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45 { |
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46 } |
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47 |
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48 |
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49 void CBytePairReader::SeekForwardL(TUint aBytes) |
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50 { |
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51 if (iBytesLeft < aBytes) |
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52 LEAVE_FAILURE(KErrCorrupt); |
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53 iNextPage += aBytes; |
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54 iBytesLeft -= aBytes; |
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55 } |
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56 |
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57 |
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58 void CBytePairReader::ReadInTableL() |
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59 { |
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60 if (KIndexTableHeaderSize > iBytesLeft) |
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61 LEAVE_FAILURE(KErrCorrupt); |
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62 Mem::Copy(&iHeader, iNextPage, KIndexTableHeaderSize); |
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63 iNextPage += KIndexTableHeaderSize; |
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64 iBytesLeft -= KIndexTableHeaderSize; |
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65 |
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66 __IF_DEBUG(Printf("numberOfPages:%d", iHeader.iNumberOfPages)); |
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67 |
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68 TUint size = iHeader.iNumberOfPages * sizeof(TUint16); |
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69 if (size > iBytesLeft) |
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70 LEAVE_FAILURE(KErrCorrupt); |
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71 // coverity[buffer_alloc] |
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72 iIndexTable = new (ELeave) TUint16[size/sizeof(TUint16)]; |
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73 Mem::Copy(iIndexTable, iNextPage, size); |
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74 iNextPage += size; |
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75 iBytesLeft -= size; |
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76 } |
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77 |
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78 |
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79 void CBytePairReader::ReleaseTable() |
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80 { |
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81 delete[] iIndexTable; |
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82 iIndexTable = NULL; |
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83 } |
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84 |
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85 |
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86 TUint CBytePairReader::GetPageL(TUint aPageNum, TUint8* aTarget, TInt aLength, TMemoryMoveFunction aMemMoveFn) |
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87 { |
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88 if (iIndexTable[aPageNum] > iBytesLeft) |
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89 LEAVE_FAILURE(KErrCorrupt); |
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90 iBytesLeft -= iIndexTable[aPageNum]; |
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91 aLength = Min(aLength, KBytePairPageSize); |
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92 |
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93 TInt size; |
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94 TUint8* nextPage; |
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95 |
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96 if (aMemMoveFn) |
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97 size = BytePairDecompress(iPageBuf, aLength, iNextPage, iIndexTable[aPageNum], nextPage); |
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98 else |
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99 size = BytePairDecompress(aTarget, aLength, iNextPage, iIndexTable[aPageNum], nextPage); |
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100 |
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101 User::LeaveIfError(size); |
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102 if (size != aLength) |
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103 LEAVE_FAILURE(KErrCorrupt); |
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104 if (iNextPage + iIndexTable[aPageNum] != nextPage) |
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105 LEAVE_FAILURE(KErrCorrupt); |
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106 |
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107 // If a memmove() was provided, use that to copy the data to its final target |
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108 if (aMemMoveFn) |
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109 aMemMoveFn(aTarget, iPageBuf, size); |
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110 |
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111 iNextPage = nextPage; |
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112 return size; |
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113 } |
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114 |
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115 |
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116 TUint CBytePairReader::DecompressPagesL(TUint8* aTarget, TInt aLength, TMemoryMoveFunction aMemMoveFn) |
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117 { |
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118 TUint decompressedSize = 0; |
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119 |
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120 ReadInTableL(); |
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121 |
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122 for (TUint curPage = 0; curPage < iHeader.iNumberOfPages; ++curPage) |
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123 { |
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124 TUint size = GetPageL(curPage, aTarget, aLength, aMemMoveFn); |
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125 |
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126 decompressedSize += size; |
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127 aTarget += size; |
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128 aLength -= size; |
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129 |
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130 __IF_DEBUG(Printf("decomp page size:%d\n", size )); |
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131 } |
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132 |
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133 __IF_DEBUG(Printf("decompressedSize:%d", decompressedSize)); |
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134 |
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135 ReleaseTable(); |
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136 |
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137 return decompressedSize; |
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138 } |
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139 |
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140 |
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141 void CBytePairReader::GetPageOffsetsL(TInt32 aInitialOffset, TInt& aPageCount, TInt32*& aPageOffsets) |
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142 { |
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143 ReadInTableL(); |
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144 aPageCount = iHeader.iNumberOfPages; |
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145 aPageOffsets = new (ELeave) TInt32[aPageCount+1]; |
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146 |
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147 TInt bytes = aInitialOffset + KIndexTableHeaderSize + aPageCount * sizeof(TUint16); |
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148 for (TInt i = 0; i < aPageCount; ++i) |
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149 { |
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150 aPageOffsets[i] = bytes; |
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151 bytes += iIndexTable[i]; |
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152 } |
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153 aPageOffsets[aPageCount] = bytes; |
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154 |
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155 ReleaseTable(); |
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156 } |
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157 |
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158 |
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159 // CBytePairFileReader - reading from file |
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160 |
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161 |
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162 CBytePairFileReader* CBytePairFileReader::NewLC(RFile& aFile) |
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163 { |
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164 CBytePairFileReader* reader = new (ELeave) CBytePairFileReader(aFile); |
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165 CleanupStack::PushL(reader); |
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166 return reader; |
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167 } |
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168 |
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169 |
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170 CBytePairFileReader::CBytePairFileReader(RFile& aFile) |
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171 : CBytePairReader(NULL, 0), iFile(aFile) |
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172 { |
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173 } |
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174 |
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175 |
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176 CBytePairFileReader::~CBytePairFileReader() |
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177 { |
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178 ReleaseTable(); |
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179 } |
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180 |
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181 |
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182 void CBytePairFileReader::SeekForwardL(TUint aBytes) |
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183 { |
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184 TInt bytes = aBytes; |
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185 User::LeaveIfError(iFile.Seek(ESeekCurrent, bytes)); |
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186 } |
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187 |
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188 |
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189 void CBytePairFileReader::ReadInTableL() |
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190 { |
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191 TPtr8 header((TUint8*)&iHeader, KIndexTableHeaderSize); |
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192 User::LeaveIfError(iFile.Read(header, KIndexTableHeaderSize)); |
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193 if (header.Length() != (TInt)KIndexTableHeaderSize) |
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194 LEAVE_FAILURE(KErrCorrupt); |
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195 |
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196 __IF_DEBUG(Printf("numberOfPages:%d", iHeader.iNumberOfPages)); |
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197 |
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198 TInt size = iHeader.iNumberOfPages * sizeof(TUint16); |
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199 iIndexTable = new (ELeave) TUint16[size/sizeof(TUint16)]; |
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200 TPtr8 indexTable((TUint8*)iIndexTable, size); |
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201 User::LeaveIfError(iFile.Read(indexTable, size)); |
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202 if (indexTable.Length() != size) |
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203 LEAVE_FAILURE(KErrCorrupt); |
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204 } |
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205 |
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206 |
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207 TUint CBytePairFileReader::DecompressPagesL(TUint8* aTarget, TInt aLength, TMemoryMoveFunction aMemMoveFn) |
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208 { |
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209 TUint decompressedSize = 0; |
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210 |
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211 ReadInTableL(); |
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212 |
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213 TUint curPage = 0; |
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214 while (curPage < iHeader.iNumberOfPages) |
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215 { |
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216 TUint bytes = 0; |
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217 TUint pages = 0; |
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218 while (curPage + pages < iHeader.iNumberOfPages && |
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219 bytes + iIndexTable[curPage+pages] < sizeof(iBuffer)) |
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220 { |
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221 bytes += iIndexTable[curPage+pages]; |
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222 ++pages; |
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223 } |
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224 if(!bytes) |
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225 LEAVE_FAILURE(KErrCorrupt); |
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226 TPtr8 data(iBuffer, bytes); |
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227 User::LeaveIfError(iFile.Read(data, bytes)); |
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228 if (data.Length() != (TInt)bytes) |
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229 LEAVE_FAILURE(KErrCorrupt); |
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230 iNextPage = iBuffer; |
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231 iBytesLeft = bytes; |
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232 |
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233 for (; pages; ++curPage, --pages) |
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234 { |
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235 TUint size = GetPageL(curPage, aTarget, aLength, aMemMoveFn); |
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236 |
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237 decompressedSize += size; |
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238 aTarget += size; |
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239 aLength -= size; |
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240 |
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241 __IF_DEBUG(Printf("decomp page size:%d\n", size )); |
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242 } |
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243 } |
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244 |
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245 __IF_DEBUG(Printf("decompressedSize:%d", decompressedSize)); |
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246 |
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247 ReleaseTable(); |
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248 |
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249 return decompressedSize; |
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250 } |