author | hgs |
Thu, 13 May 2010 20:08:44 +0100 | |
changeset 36 | 2e966480abb1 |
parent 0 | 3553901f7fa8 |
child 24 | 6638e7f4bd8f |
child 42 | 3adadc800673 |
permissions | -rw-r--r-- |
0
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// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies). |
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// All rights reserved. |
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// This component and the accompanying materials are made available |
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// under the terms of "Eclipse Public License v1.0" |
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// which accompanies this distribution, and is available |
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// at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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// |
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// Initial Contributors: |
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// Nokia Corporation - initial contribution. |
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// |
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// Contributors: |
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// |
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// Description: |
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// Name : CBerTlv.cpp |
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// Part of : Series 60 / utility |
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// Based on 3GPP TS 11.14 V8.8.0 |
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// Version : 1.0 |
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// EXTERNAL RESOURCES |
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// |
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// Include Files |
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#include "CBerTlv.h" // Header of this class |
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#include "tflogger.h" // For logging |
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// External Data Structures |
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// none |
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// External Function Prototypes |
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// none |
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// LOCAL CONSTANTS AND MACROS |
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// none |
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// MODULE DATA STRUCTURES |
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// none |
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// Local Data Structures |
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// none |
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// Local Function Prototypes |
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// none |
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// LOCAL FUNCTIONS |
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// none |
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// MEMBER FUNCTIONS |
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//============================================================================= |
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// ----------------------------------------------------------------------------- |
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// CBerTlv::CBerTlv |
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// Constructor |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C CBerTlv::CBerTlv |
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( |
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// None |
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) |
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{ |
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// None |
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} |
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// ----------------------------------------------------------------------------- |
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// CBerTlv::TlvByTagValue |
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// Find TLV by tag value. aTlv is set to point to found TLV. If there are more |
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// than one TLV with the same tag then itemNbr can be used to select which one |
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// is returned. If no tags are found return KErrNotFound else KErrNone. |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C TInt CBerTlv::TlvByTagValue |
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( |
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CTlv* aTlv, // TLV |
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TUint8 aTlvTagValue, // TLV identifier |
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TInt itemNbr // Item number |
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) |
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{ |
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TFLOGSTRING("UTILITY: CBerTlv::TlvByTagValue"); |
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TInt currentTlv( 0 ); |
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TInt tlvLength( 0 ); |
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TInt index( 0 ); |
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// TLV start index |
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TInt ind( KCommonTlvHeaderLength ); |
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TUint8 berTlvLength( 0 ); |
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if ( KTwoByteLengthCoding == iData[KTlvLengthStartPosition] ) |
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{ |
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berTlvLength = iData[KTlvLengthStartPosition + 1]; |
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ind = ind + 1; |
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} |
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else |
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{ |
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berTlvLength = iData[KTlvLengthStartPosition]; |
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} |
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for ( TInt i = 0; i < berTlvLength; i += tlvLength ) |
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{ |
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// First determine if the length of the TLV is coded with 1 or 2 bytes. |
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if ( KTwoByteLengthCoding == iData[ind + 1] ) |
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{ |
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// Length is coded with 2 bytes -> 1 extra byte required to be |
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// added to total length. Also TLV header bytes (2) must be added |
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// to total length |
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tlvLength = iData[ind + 2] + KTlvHeaderLength + 1; |
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} |
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107 |
else |
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108 |
{ |
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109 |
// TLV header bytes (2) must be added to total length |
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tlvLength = iData[ind + 1] + KTlvHeaderLength; |
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111 |
} |
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112 |
|
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113 |
currentTlv = iData[ind]&KTagValueMask; |
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114 |
|
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115 |
// Check if TLV in current index is the one that we are searching for |
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if ( aTlvTagValue == currentTlv ) |
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117 |
{ |
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118 |
if( index == itemNbr) |
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119 |
{ |
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TPtrC8 data = ( iData.Mid( ind , tlvLength ) ); |
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121 |
aTlv->SetData( data ); |
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122 |
return KErrNone; |
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123 |
} |
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124 |
else |
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125 |
{ |
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index++; |
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127 |
} |
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128 |
} |
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129 |
|
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130 |
ind += tlvLength; |
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131 |
} |
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132 |
|
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133 |
return KErrNotFound; |
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134 |
} |
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135 |
|
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136 |
// ----------------------------------------------------------------------------- |
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137 |
// CBerTlv::TlvByTagValueMulti |
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138 |
// Find several TLVs by tag value. It is assumed that TLVs are sequential. aTlv |
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139 |
// is set to point to TLV sequence. If no tags are found return KErrNotFound |
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140 |
// else KErrNone. |
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141 |
// ----------------------------------------------------------------------------- |
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142 |
// |
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143 |
EXPORT_C TInt CBerTlv::TlvByTagValueMulti |
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144 |
( |
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145 |
CTlv* aTlv, // TLV to fill |
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146 |
TUint8 aTlvTagValue // Tag of TLV to find |
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147 |
) |
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148 |
{ |
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149 |
TFLOGSTRING("UTILITY: CBerTlv::TlvByTagValueMulti"); |
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150 |
TInt currentTlv( 0 ); |
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151 |
TInt16 tlvLength( 0 ); |
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152 |
TInt indMulti( 0 ); |
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153 |
TInt16 multiLength( 0 ); |
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154 |
// TLV start index |
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155 |
TInt ind( KCommonTlvHeaderLength ); |
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156 |
TUint8 berTlvLength; |
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157 |
// First determine if the length of the BerTLV is coded with 1 or 2 bytes. |
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158 |
if ( KTwoByteLengthCoding == iData[KTlvLengthStartPosition] ) |
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159 |
{ |
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160 |
berTlvLength = iData[KTlvLengthStartPosition + 1]; |
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161 |
ind = ind + 1; |
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162 |
} |
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163 |
else |
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|
164 |
{ |
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165 |
berTlvLength = iData[KTlvLengthStartPosition]; |
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|
166 |
} |
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|
167 |
|
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168 |
for ( TInt i = 0; i < berTlvLength; i+= tlvLength ) |
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|
169 |
{ |
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170 |
// First determine if the length of the TLV is coded with 1 or 2 bytes. |
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|
171 |
if ( KTwoByteLengthCoding == iData[ind + 1] ) |
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|
172 |
{ |
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|
173 |
// Length is coded with 2 bytes -> real length is in second byte. |
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|
174 |
// first byte is 81 and it is tag for 2 byte length coding. |
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|
175 |
tlvLength = static_cast<TInt16>( iData[ind + 0x02] + |
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|
176 |
KTlvHeaderLength + 1 ); |
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|
177 |
} |
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|
178 |
else |
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|
179 |
{ |
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|
180 |
// TLV header bytes (2) must be added to total length |
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|
181 |
tlvLength = static_cast<TInt16>( iData[ind + 1] + |
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182 |
KTlvHeaderLength ); |
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|
183 |
} |
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|
184 |
|
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|
185 |
currentTlv = iData[ind]&KTagValueMask; |
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|
186 |
|
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|
187 |
// Check if TLV in current index is the one that we are searching for |
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|
188 |
if ( aTlvTagValue == currentTlv && multiLength == 0x00 ) |
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|
189 |
{ |
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|
190 |
// Save first tag position |
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|
191 |
indMulti = ind; |
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|
192 |
multiLength = tlvLength; |
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|
193 |
} |
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|
194 |
// Add length |
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|
195 |
if ( aTlvTagValue == currentTlv && indMulti != ind ) |
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|
196 |
{ |
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|
197 |
multiLength = static_cast<TInt16>( multiLength + tlvLength ); |
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|
198 |
} |
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|
199 |
|
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|
200 |
// If last tag, return |
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|
201 |
if ( (i + tlvLength) >= berTlvLength ) |
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|
202 |
{ |
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|
203 |
TPtrC8 data = ( iData.Mid( indMulti , multiLength ) ); |
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|
204 |
aTlv->SetData( data ); |
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|
205 |
break; |
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|
206 |
} |
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|
207 |
ind += tlvLength; |
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|
208 |
} |
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diff
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|
209 |
|
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|
210 |
if( 0 == indMulti) |
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|
211 |
{ |
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Revision: 201005
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|
212 |
return KErrNotFound; |
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} |
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else |
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{ |
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return KErrNone; |
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} |
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} |
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|
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|
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//End Of File |