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1 // Copyright (c) 2006-2009 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 "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 // GZIP output stream functions |
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15 // |
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16 |
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17 #include "xmlenggzipbufferoutputstream.h" |
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18 #include <ezstream.h> |
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19 #include <ezcompressor.h> |
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20 |
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21 |
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22 CXmlEngGZIPBufferOutputStream* CXmlEngGZIPBufferOutputStream::NewLC( RBuf8& aOutputBuffer ) |
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23 { |
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24 CXmlEngGZIPBufferOutputStream* gzbos = new (ELeave) CXmlEngGZIPBufferOutputStream( aOutputBuffer ); |
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25 CleanupStack::PushL( gzbos ); |
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26 gzbos->ConstructL(); |
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27 return gzbos; |
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28 } |
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29 |
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30 CXmlEngGZIPBufferOutputStream* CXmlEngGZIPBufferOutputStream::NewL( RBuf8& aOutputBuffer ) |
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31 { |
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32 CXmlEngGZIPBufferOutputStream* gzbos = CXmlEngGZIPBufferOutputStream::NewLC( aOutputBuffer ); |
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33 CleanupStack::Pop( gzbos ); |
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34 return gzbos; |
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35 } |
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36 |
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37 CXmlEngGZIPBufferOutputStream::CXmlEngGZIPBufferOutputStream( RBuf8& aOutputBuffer ) : iOutputString(aOutputBuffer) |
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38 { |
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39 iKeepGoing = ETrue; |
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40 } |
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41 |
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42 void CXmlEngGZIPBufferOutputStream::ConstructL() |
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43 { |
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44 if(!iOutputString.MaxSize()) |
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45 { |
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46 iOutputString.ReAllocL(KOutputBufferSize); |
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47 } |
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48 //we can't create compressor here, because we heve no input at this moment |
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49 iOutputDescriptor.CreateL( KOutputBufferSize ); |
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50 iInputDescriptor.CreateL( KDefaultInputBufferSize ); |
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51 iOldInputDescriptor.CreateL( KDefaultInputBufferSize ); |
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52 } |
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53 |
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54 CXmlEngGZIPBufferOutputStream::~CXmlEngGZIPBufferOutputStream() |
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55 { |
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56 delete iCompressor; |
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57 iOutputDescriptor.Close(); |
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58 iInputDescriptor.Close(); |
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59 iOldInputDescriptor.Close(); |
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60 } |
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61 |
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62 TInt CXmlEngGZIPBufferOutputStream::Write( const TDesC8& aBuffer ) |
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63 { |
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64 TRAP ( iError, WriteL( aBuffer ) ); |
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65 if ( iError ) |
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66 { |
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67 return -1; |
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68 } |
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69 |
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70 return aBuffer.Size(); |
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71 } |
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72 |
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73 void CXmlEngGZIPBufferOutputStream::WriteL( const TDesC8& aBuffer ) |
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74 { |
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75 iNoInputNeeded = ETrue; |
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76 if ( !iCompressor ) |
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77 { |
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78 const TInt newLength = aBuffer.Size(); |
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79 if ( newLength > iInputDescriptor.Size() ) |
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80 { |
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81 iInputDescriptor.ReAllocL( newLength ); |
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82 } |
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83 iInputDescriptor.Copy( aBuffer ); |
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84 iCompressor = CEZCompressor::NewL( *this ); |
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85 } |
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86 else |
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87 { |
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88 iInputDescriptor.Swap( iOldInputDescriptor ); |
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89 const TInt newLength = aBuffer.Length(); |
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90 if ( newLength > iInputDescriptor.MaxLength() ) |
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91 { |
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92 iInputDescriptor.ReAllocL( newLength ); |
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93 } |
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94 iInputDescriptor.Copy( aBuffer ); |
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95 |
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96 while ( iNoInputNeeded ) |
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97 { |
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98 iCompressor->DeflateL(); |
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99 } |
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100 } |
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101 } |
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102 |
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103 TInt CXmlEngGZIPBufferOutputStream::Close() |
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104 { |
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105 iCloseInvoked = ETrue; |
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106 if ( iError ) |
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107 { |
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108 return -1; |
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109 } |
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110 TRAP ( iError, CloseL() ); |
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111 if ( iError ) |
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112 { |
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113 return -1; |
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114 } |
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115 return KErrNone; |
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116 } |
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117 |
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118 void CXmlEngGZIPBufferOutputStream::CloseL() |
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119 { |
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120 while ( iKeepGoing ) |
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121 { |
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122 iKeepGoing = iCompressor->DeflateL(); |
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123 } |
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124 } |
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125 |
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126 TInt CXmlEngGZIPBufferOutputStream::CheckError() |
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127 { |
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128 return iError; |
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129 } |
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130 |
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131 void CXmlEngGZIPBufferOutputStream::InitializeL( CEZZStream& aZStream ) |
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132 { |
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133 aZStream.SetInput( iInputDescriptor ); |
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134 aZStream.SetOutput( iOutputDescriptor ); |
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135 iNoInputNeeded = EFalse; |
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136 } |
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137 |
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138 void CXmlEngGZIPBufferOutputStream::NeedInputL( CEZZStream& aZStream ) |
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139 { |
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140 if ( iCloseInvoked ) |
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141 { |
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142 aZStream.SetInput( KNullDesC8 ); |
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143 } |
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144 else |
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145 { |
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146 aZStream.SetInput( iInputDescriptor ); |
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147 iNoInputNeeded = EFalse; |
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148 } |
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149 } |
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150 |
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151 void CXmlEngGZIPBufferOutputStream::NeedOutputL( CEZZStream& aZStream ) |
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152 { |
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153 TPtrC8 od = aZStream.OutputDescriptor(); |
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154 while(TRUE) |
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155 { |
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156 if (od.Size() > (iOutputString.MaxSize() - iOutputString.Size())) |
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157 { |
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158 iOutputString.ReAllocL( iOutputString.MaxSize()*2 ); |
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159 } |
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160 else |
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161 { |
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162 break; |
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163 } |
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164 } |
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165 iOutputString.Append( od ); |
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166 aZStream.SetOutput( iOutputDescriptor ); |
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167 } |
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168 |
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169 void CXmlEngGZIPBufferOutputStream::FinalizeL( CEZZStream& aZStream ) |
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170 { |
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171 TPtrC8 od = aZStream.OutputDescriptor(); |
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172 while(TRUE) |
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173 { |
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174 if (od.Size() > (iOutputString.MaxSize() - iOutputString.Size())) |
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175 { |
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176 iOutputString.ReAllocL( iOutputString.MaxSize()*2 ); |
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177 } |
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178 else |
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179 { |
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180 break; |
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181 } |
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182 } |
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183 iOutputString.Append( od ); |
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184 } |
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185 |
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186 |