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1 // Copyright (c) 2002-2009 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 // f32test\ext\bitext.cpp |
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15 // extension to do XOR on every byte on 32 byte boundary read or written to media subsystem in same thread |
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16 // therefore RFile::Read/Write does not have this operation carried out on it |
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17 // |
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18 // |
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19 |
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20 #include <f32fsys.h> |
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21 |
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22 class CBitExtProxyDrive : public CBaseExtProxyDrive |
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23 { |
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24 public: |
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25 static CBitExtProxyDrive* NewL(CProxyDrive* aProxyDrive, CMountCB* aMount); |
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26 ~CBitExtProxyDrive(); |
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27 public: |
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28 virtual TInt Initialise(); |
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29 virtual TInt Dismounted(); |
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30 virtual TInt Enlarge(TInt aLength); |
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31 virtual TInt ReduceSize(TInt aPos, TInt aLength); |
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32 virtual TInt Read(TInt64 aPos,TInt aLength,const TAny* aTrg,TInt aThreadHandle,TInt anOffset); |
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33 virtual TInt Read(TInt64 aPos,TInt aLength,TDes8& aTrg); |
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34 virtual TInt Write(TInt64 aPos,TInt aLength,const TAny* aSrc,TInt aThreadHandle,TInt anOffset); |
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35 virtual TInt Write(TInt64 aPos,const TDesC8& aSrc); |
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36 virtual TInt Format(TFormatInfo& anInfo); |
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37 virtual TInt GetInterface(TInt aInterfaceId,TAny*& aInterface,TAny* aInput); |
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38 private: |
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39 CBitExtProxyDrive(CProxyDrive* aProxyDrive, CMountCB* aMount); |
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40 private: |
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41 TInt iReadThread; |
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42 TInt iRead; |
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43 TInt iWriteThread; |
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44 TInt iWrite; |
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45 TInt iFormat; |
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46 }; |
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47 |
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48 class CBitProxyDriveFactory : public CProxyDriveFactory |
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49 { |
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50 public: |
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51 CBitProxyDriveFactory(); |
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52 virtual TInt Install(); |
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53 virtual CProxyDrive* NewProxyDriveL(CProxyDrive* aProxy,CMountCB* aMount); |
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54 }; |
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55 |
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56 const TUint8 KBitMask=0xcc; |
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57 const TInt KChangePosMask=0x0000001f; |
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58 |
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59 LOCAL_C void DoXOR(TInt aPos,TInt aLength,TUint8* aPtr) |
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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 for(TInt i=0;i<aLength;++i) |
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65 { |
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66 if(((i+aPos)&KChangePosMask)==0) |
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67 aPtr[i]^=KBitMask; |
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68 } |
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69 } |
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70 |
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71 |
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72 CBitExtProxyDrive* CBitExtProxyDrive::NewL(CProxyDrive* aProxyDrive, CMountCB* aMount) |
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73 // |
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74 // |
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75 // |
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76 { |
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77 CBitExtProxyDrive* temp=new(ELeave) CBitExtProxyDrive(aProxyDrive,aMount); |
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78 return(temp); |
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79 } |
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80 |
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81 |
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82 CBitExtProxyDrive::CBitExtProxyDrive(CProxyDrive* aProxyDrive, CMountCB* aMount):CBaseExtProxyDrive(aProxyDrive,aMount) |
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83 { |
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84 RDebug::Print(_L("CBitExtProxyDrive::CBitExtProxyDrive")); |
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85 } |
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86 |
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87 CBitExtProxyDrive::~CBitExtProxyDrive() |
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88 // |
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89 // |
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90 // |
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91 { |
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92 RDebug::Print(_L("Read Thread = %d"),iReadThread); |
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93 RDebug::Print(_L("Read = %d"),iRead); |
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94 RDebug::Print(_L("Write Thread = %d"),iWriteThread); |
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95 RDebug::Print(_L("Write = %d"),iWrite); |
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96 RDebug::Print(_L("Format = %d"),iFormat); |
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97 } |
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98 |
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99 TInt CBitExtProxyDrive::Initialise() |
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100 // |
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101 // |
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102 // |
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103 { |
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104 return(CBaseExtProxyDrive::Initialise()); |
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105 } |
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106 |
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107 TInt CBitExtProxyDrive::Dismounted() |
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108 // |
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109 // |
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110 // |
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111 { |
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112 return(CBaseExtProxyDrive::Dismounted()); |
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113 } |
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114 |
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115 TInt CBitExtProxyDrive::Enlarge(TInt aLength) |
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116 // |
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117 // |
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118 // |
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119 { |
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120 return(CBaseExtProxyDrive::Enlarge(aLength)); |
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121 } |
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122 |
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123 |
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124 TInt CBitExtProxyDrive::ReduceSize(TInt aPos, TInt aLength) |
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125 // |
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126 // |
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127 // |
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128 { |
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129 return(CBaseExtProxyDrive::ReduceSize(aPos,aLength)); |
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130 } |
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131 |
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132 TInt CBitExtProxyDrive::Read(TInt64 aPos,TInt aLength,const TAny* aTrg,TInt aThreadHandle,TInt anOffset) |
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133 // |
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134 // |
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135 // |
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136 { |
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137 ++iReadThread; |
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138 return(CBaseExtProxyDrive::Read(aPos,aLength,aTrg,aThreadHandle,anOffset)); |
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139 } |
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140 |
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141 TInt CBitExtProxyDrive::Read(TInt64 aPos,TInt aLength,TDes8& aTrg) |
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142 // |
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143 // |
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144 // |
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145 { |
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146 ++iRead; |
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147 TInt r=CBaseExtProxyDrive::Read(aPos,aLength,aTrg); |
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148 DoXOR(I64INT(aPos),aLength,&aTrg[0]); |
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149 return(r); |
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150 } |
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151 |
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152 |
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153 TInt CBitExtProxyDrive::Write(TInt64 aPos,TInt aLength,const TAny* aSrc,TInt aThreadHandle,TInt anOffset) |
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154 // |
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155 // |
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156 // |
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157 { |
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158 ++iWriteThread; |
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159 return(CBaseExtProxyDrive::Write(aPos,aLength,aSrc,aThreadHandle,anOffset)); |
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160 } |
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161 |
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162 TInt CBitExtProxyDrive::Write(TInt64 aPos,const TDesC8& aSrc) |
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163 // |
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164 // |
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165 // |
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166 { |
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167 ++iWrite; |
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168 |
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169 // data may be read-only, so need to copy to a local buffer |
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170 // before XOR-ing... |
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171 HBufC8* buf = HBufC8::New( aSrc.Length() ); |
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172 if( !buf ) |
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173 return KErrNoMemory; |
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174 TPtr8 ptr = buf->Des(); |
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175 ptr.Copy(aSrc); |
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176 |
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177 DoXOR(I64INT(aPos), ptr.Length(), (TUint8*)ptr.Ptr()); |
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178 TInt r = CBaseExtProxyDrive::Write(aPos, ptr); |
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179 |
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180 delete buf; |
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181 |
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182 return(r); |
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183 } |
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184 |
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185 TInt CBitExtProxyDrive::Format(TFormatInfo& anInfo) |
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186 // |
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187 // |
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188 // |
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189 { |
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190 ++iFormat; |
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191 return(CBaseExtProxyDrive::Format(anInfo)); |
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192 } |
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193 |
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194 |
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195 TInt CBitExtProxyDrive::GetInterface(TInt aInterfaceId,TAny*& aInterface,TAny* aInput) |
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196 { |
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197 switch(aInterfaceId) |
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198 { |
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199 // file caching supported, so pass query on to next extension |
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200 case ELocalBufferSupport: |
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201 return CBaseExtProxyDrive::LocalBufferSupport(); |
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202 |
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203 default: |
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204 return CBaseExtProxyDrive::GetInterface(aInterfaceId, aInterface, aInput); |
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205 } |
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206 } |
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207 |
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208 CBitProxyDriveFactory::CBitProxyDriveFactory() |
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209 // |
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210 // |
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211 // |
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212 { |
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213 RDebug::Print(_L("CBitProxyDriveFactory::CBitProxyDriveFactory")); |
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214 } |
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215 |
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216 TInt CBitProxyDriveFactory::Install() |
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217 // |
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218 // |
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219 // |
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220 { |
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221 _LIT(KBitName,"Bitchange"); |
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222 return(SetName(&KBitName)); |
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223 } |
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224 |
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225 |
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226 CProxyDrive* CBitProxyDriveFactory::NewProxyDriveL(CProxyDrive* aProxy,CMountCB* aMount) |
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227 // |
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228 // |
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229 // |
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230 { |
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231 return(CBitExtProxyDrive::NewL(aProxy,aMount)); |
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232 } |
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233 |
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234 extern "C" { |
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235 |
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236 EXPORT_C CProxyDriveFactory* CreateFileSystem() |
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237 // |
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238 // Create a new file system |
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239 // |
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240 { |
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241 return(new CBitProxyDriveFactory()); |
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242 } |
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243 } |
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244 |