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1 /* |
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2 * Copyright (c) 2009-2010 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: |
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15 * Implementation to read from the config file. |
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16 * |
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17 * |
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18 */ |
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19 |
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20 |
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21 #include "config.h" |
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22 |
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23 // --------------------------------------------------------------------------- |
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24 // ReadConfigFile |
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25 // |
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26 // Reads the configuration file to aBuffer, aLineBuffer containing the pointers to lines. |
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27 // |
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28 // @return TInt normal Symbian error code or KErrNone if all went OK. |
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29 // --------------------------------------------------------------------------- |
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30 // |
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31 TInt ReadConfigFile(RFile& aFile, TDes& aBuffer, RArray< TPtrC >& aLineBuffer ) |
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32 { |
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33 // Read text file into buffers |
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34 TInt ret( KErrNone ); |
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35 TFileText tf; |
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36 tf.Set( aFile ); |
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37 aBuffer.SetMax(); |
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38 TPtr ptr( aBuffer.MidTPtr( 0 ) ); |
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39 TInt used( 0 ); |
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40 do |
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41 { |
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42 ret = tf.Read( ptr ); |
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43 TInt len( ptr.Length() ); |
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44 if ( ( ret == KErrNone || ret == KErrEof ) && len > 0 ) |
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45 { |
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46 // Store non-empty text line |
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47 TInt err( aLineBuffer.Append( ptr ) ); |
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48 if ( err == KErrNone ) |
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49 { |
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50 ptr.SetMax(); |
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51 ptr.Set( ptr.MidTPtr( len ) ); |
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52 ptr.Zero(); |
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53 used += len; |
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54 } |
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55 else |
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56 { |
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57 ret = err; |
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58 } |
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59 } |
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60 } |
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61 while ( ret == KErrNone ); |
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62 if ( ret == KErrEof ) |
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63 { |
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64 // reached the end of file without any other error => this is OK |
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65 ret = KErrNone; |
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66 } |
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67 aBuffer.SetLength( used ); |
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68 |
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69 return ret; |
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70 } |
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71 |
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72 // --------------------------------------------------------------------------- |
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73 // ReadConfigFile |
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74 // |
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75 // @return HBufC containg the read config file. aLineBuffer arrays pointing to lines. |
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76 // --------------------------------------------------------------------------- |
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77 // |
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78 HBufC* ReadConfigFile( RFs& aFs, const TDesC& aFullPath, RArray< TPtrC >& aLineBuffer, TInt& aError ) |
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79 { |
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80 RFile file; |
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81 aError = file.Open( aFs, aFullPath, EFileRead | EFileStreamText | EFileShareReadersOnly ); |
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82 if ( aError != KErrNone ) |
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83 { |
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84 return NULL; |
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85 } |
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86 TInt size( 0 ); |
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87 aError = file.Size( size ); |
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88 if ( aError != KErrNone ) |
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89 { |
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90 file.Close(); |
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91 return NULL; |
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92 } |
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93 // Get text size, create buffer for text and read text file |
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94 HBufC* ret = HBufC::New( ( size + sizeof( TText ) - 1 ) / sizeof( TText ) ); |
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95 if ( !ret ) |
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96 { |
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97 aError = KErrNoMemory; |
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98 file.Close(); |
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99 return NULL; |
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100 } |
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101 TPtr ptr( ret->Des() ); |
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102 aError = ReadConfigFile( file, ptr, aLineBuffer ); |
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103 file.Close(); |
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104 if ( aError != KErrNone ) |
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105 { |
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106 delete ret; |
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107 aLineBuffer.Reset(); |
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108 return NULL; |
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109 } |
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110 return ret; |
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111 } |
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112 |
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113 // --------------------------------------------------------------------------- |
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114 // GetConfigValue |
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115 // |
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116 // Gets string specified by tag. For examples: |
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117 // Tag1=Value1 Tag1 = aTag, Value1 will be copied to aTag |
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118 // aError Normal Symbian error code or KErrNone if all went OK. |
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119 // --------------------------------------------------------------------------- |
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120 // |
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121 TPtrC GetConfigValue( const TDesC& aTag, const RArray< TPtrC >& aLineBuffer, TInt& aError ) |
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122 { |
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123 aError = KErrNotFound; |
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124 TPtrC ret( KNullDesC ); |
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125 const TInt tagLen( aTag.Length() ); |
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126 const TInt count( aLineBuffer.Count() ); |
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127 for( TInt i( 0 ); i < count; ++i ) |
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128 { |
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129 TPtrC line( aLineBuffer[ i ] ); |
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130 if ( !line.Left( tagLen ).CompareF( aTag ) ) |
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131 { |
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132 ret.Set( line.Mid( tagLen ) ); |
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133 aError = KErrNone; |
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134 break; |
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135 } |
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136 } |
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137 |
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138 return ret; |
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139 } |
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140 |
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141 TInt CompareVersions(TVersion& version1,TVersion& version2) |
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142 { |
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143 // Compare the versions based on major,minor and build number. |
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144 if((version1.iMajor == version2.iMajor)&&(version1.iMinor == version2.iMinor)&&(version1.iBuild == version2.iBuild)) |
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145 { |
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146 return EEqualVersion; |
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147 } |
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148 else if ((version1.iMajor > version2.iMajor) || |
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149 ((version1.iMajor == version2.iMajor)&&(version1.iMinor > version2.iMinor)) || |
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150 ((version1.iMajor == version2.iMajor)&&(version1.iMinor == version2.iMinor)&&(version1.iBuild >= version2.iBuild))) |
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151 { |
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152 return EGreaterFirstVersion; |
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153 } |
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154 else |
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155 { |
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156 return EGreaterSecondVersion; |
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157 } |
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158 } |
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159 |
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160 TBool SetVersion(const TDesC8& aVersionPtr, TVersion& aVer) |
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161 { |
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162 // Function will return EFalse if aVersionPtr is not a valid |
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163 // version string |
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164 TLex8 lex(aVersionPtr); |
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165 TInt count = 0; |
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166 lex.SkipSpace(); |
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167 |
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168 // Get Major Version (max length 3) |
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169 const TInt maxMajorVersionLength = 3; |
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170 lex.Mark(); |
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171 while ( (count<maxMajorVersionLength) && (lex.Peek() != '.') ) |
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172 { |
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173 lex.Inc(); |
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174 ++count; |
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175 } |
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176 |
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177 if (!(lex.Peek() == '.')) |
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178 { |
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179 return EFalse; |
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180 } |
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181 |
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182 TLex8 lexToken(lex.MarkedToken()); |
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183 if ( lexToken.Val(aVer.iMajor) != KErrNone ) |
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184 { |
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185 return EFalse; |
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186 } |
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187 |
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188 // Get Minor Version(max length 2) |
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189 const TInt maxMinorVersionLength = 2; |
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190 count = 0; |
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191 lex.Inc(); |
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192 lex.Mark(); |
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193 while ( (count<maxMinorVersionLength) && (lex.Peek() != '.') ) |
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194 { |
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195 lex.Inc(); |
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196 ++count; |
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197 } |
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198 |
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199 lexToken.Assign(lex.MarkedToken()); |
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200 if ( lexToken.Val(aVer.iMinor) != KErrNone ) |
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201 { |
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202 return EFalse; |
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203 } |
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204 |
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205 // Check if Build Number exists, |
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206 // otherwise return |
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207 if (!(lex.Peek() == '.')) |
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208 { |
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209 lex.Mark(); |
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210 lex.SkipCharacters(); |
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211 if (lex.TokenLength() > 0) |
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212 { |
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213 return EFalse; |
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214 } |
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215 else |
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216 { |
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217 aVer.iBuild = 0; |
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218 return ETrue; |
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219 } |
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220 } |
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221 |
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222 // Get Build Number(max length 5) |
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223 const TInt maxBuildNoLength = 5; |
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224 lex.Inc(); |
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225 lex.Mark(); |
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226 lex.SkipCharacters(); |
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227 |
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228 if (lex.TokenLength() > maxBuildNoLength) |
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229 { |
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230 return EFalse; |
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231 } |
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232 |
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233 lexToken.Assign(lex.MarkedToken()); |
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234 if ( lexToken.Val(aVer.iBuild) != KErrNone ) |
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235 { |
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236 return EFalse; |
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237 } |
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238 return ETrue; |
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239 } |