author | hgs |
Tue, 19 Oct 2010 11:00:12 +0800 | |
changeset 57 | f6055a57ae18 |
parent 0 | d0791faffa3f |
permissions | -rw-r--r-- |
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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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// |
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|
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#include <obex/transport/obexreaderbase.h> |
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#include <obex/internal/obexpacket.h> |
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#include <obex/transport/mobextransportnotify.h> |
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#include "logger.h" |
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|
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#ifdef __FLOG_ACTIVE |
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_LIT8(KLogComponent, "OBEXCT"); |
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#endif |
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|
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/** |
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*Constructor |
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*/ |
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EXPORT_C CObexReaderBase::CObexReaderBase(TPriority aPriority, |
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MObexTransportNotify& aOwner, |
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TObexConnectionInfo& aInfo) |
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: CObexActiveRW (aPriority, aOwner, aInfo) |
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{ |
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LOG_LINE |
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LOG_FUNC |
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} |
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/** |
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* Destructor |
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*/ |
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EXPORT_C CObexReaderBase::~CObexReaderBase() |
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{ |
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LOG_LINE |
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LOG_FUNC |
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Cancel(); |
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} |
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/** |
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This function is a place holder for future use. If the iFuture1 variable is |
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used it will need this function for any allocation required. |
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|
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To prevent binary compatiblity breaks if the iFuture1 variable is used, this |
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function must be called from the |
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NewL of derived classes. |
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*/ |
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EXPORT_C void CObexReaderBase::BaseConstructL() |
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{ |
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LOG_LINE |
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LOG_FUNC |
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} |
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|
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/** |
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Start transfer. Calls into CObexActiveRW, which eventually queues a read |
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@param aPacket The Obex packet to read into. |
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*/ |
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EXPORT_C void CObexReaderBase::StartTransfer (CObexPacket& aPacket) |
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{ |
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LOG_LINE |
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LOG_FUNC |
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// Ensure that we don't try to queue two reads at once (this should probably |
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// never happen anyway). |
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if (IsActive()) |
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{ |
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FLOG(_L("\treturning because already active...")); |
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return; |
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} |
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iGotHeader = EFalse; |
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// Initial packet size indicates how much data we should ask for on the |
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// first read |
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// Packet & stream based transports do the same thing here due to ESOCK |
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// flexibility. |
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// See Remaining() and CompleteTransfer() for a clearer picture |
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iPacketSize = 0; |
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aPacket.Init(0); |
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NewRequest (aPacket); |
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} |
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|
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/** |
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Check if the packet read is complete |
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@return ETrue if the read is complete. EFalse otherwise. |
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*/ |
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EXPORT_C TBool CObexReaderBase::CompleteTransfer () |
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{ |
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LOG_LINE |
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LOG_FUNC |
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|
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iTransferError = KErrNone; |
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|
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// Can't check anything until we have at least the OBEX packet header |
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if (iCount >= KObexPacketHeaderSize) |
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{// iCount is the number of bytes read thus far |
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if (!iGotHeader) |
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{ |
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106 |
iPacketSize = iPacket->PacketSize (); |
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107 |
|
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108 |
// Check packet's claimed size is at least as big as the header just sent |
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if ( iPacketSize < KObexPacketHeaderSize ) |
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110 |
{ |
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iTransferError = KErrCommsFrame; |
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return ETrue; |
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} |
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TInt maxPacketSize = GetMaxPacketSize(); |
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LOG1(_L8("\taMaxPacketSize = %d"), maxPacketSize); |
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if (iPacketSize > maxPacketSize) |
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{// The peer is sending us a packet thats too large for us |
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iTransferError = KErrCommsFrame; |
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return (ETrue); |
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120 |
} |
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iGotHeader = ETrue; |
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122 |
OnReadActivity(); |
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123 |
} |
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124 |
|
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125 |
|
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if (iCount >= iPacketSize) |
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{// We've got the whole packet. |
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return (ETrue); |
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} |
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130 |
} |
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return (EFalse); |
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132 |
|
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133 |
} |
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134 |
|
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135 |
/** |
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136 |
Called when read activity is detected. |
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This method will certainly be called when read activity is |
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first detected on an Obex operation, and it may be called |
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from time to time thereafter until that Obex operation is |
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140 |
completed. |
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141 |
*/ |
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142 |
EXPORT_C void CObexReaderBase::OnReadActivity() |
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143 |
{ |
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iOwner.SignalPacketProcessEvent(EObexReadActivityDetected); |
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145 |
} |
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146 |
|
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/** Performs any actions necessary on completion of a read. |
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148 |
*/ |
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149 |
EXPORT_C void CObexReaderBase::OnCompleteTransfer() |
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150 |
{ |
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151 |
if(iTransferError) |
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152 |
{ |
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iOwner.Error(iTransferError); |
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154 |
} |
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155 |
else |
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156 |
{ |
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157 |
iOwner.Process(*iPacket); |
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158 |
} |
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159 |
} |
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160 |
|
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161 |
/* |
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162 |
Returns the number of bytes remaining to be read based on the default packet |
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163 |
size if the packet size is unknown, otherwise based on the packet size |
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164 |
|
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@return TInt the number of bytes remaining to be read |
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166 |
*/ |
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167 |
EXPORT_C TInt CObexReaderBase::Remaining() |
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168 |
{ |
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169 |
LOG_LINE |
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170 |
LOG_FUNC |
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171 |
|
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172 |
|
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173 |
TInt remaining; |
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174 |
|
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175 |
if (iPacketSize == 0) |
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176 |
{ |
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177 |
// If we don't know the size of the packet yet, ask for as much as |
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// an initial or default size (-iCount) specifies |
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179 |
TInt defaultPacketSize = GetInitialPacketSize(); |
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180 |
LOG1(_L8("\taRemainingLimit = %d"), defaultPacketSize); |
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181 |
remaining = defaultPacketSize - iCount; |
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182 |
} |
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183 |
else |
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184 |
{ |
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185 |
remaining = iPacketSize - iCount; |
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186 |
} |
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187 |
|
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188 |
if (remaining < 0) |
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189 |
{ |
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190 |
remaining = 0; |
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191 |
} |
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192 |
|
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193 |
return remaining; |
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194 |
} |
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195 |
|
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196 |
/** |
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197 |
This function returns the buffer size of the read packet. |
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198 |
|
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199 |
@return TInt the size of the buffer held by the iPacket member variable |
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200 |
*/ |
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201 |
EXPORT_C TInt CObexReaderBase::GetObexPacketBufferSize() |
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202 |
{ |
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203 |
return iPacket->BufferSize(); |
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204 |
} |
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205 |
|
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206 |
/** |
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207 |
This function returns the size of the obex packet's header |
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208 |
|
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209 |
@return TInt the size of the obex header |
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210 |
*/ |
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211 |
EXPORT_C TInt CObexReaderBase::GetObexPacketHeaderSize() |
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212 |
{ |
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return KObexPacketHeaderSize; |
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} |
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/** |
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This function return the maximum limit the received data can be |
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@return TInt the data limit of the obex packet |
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*/ |
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EXPORT_C TInt CObexReaderBase::GetObexPacketDataLimit() |
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{ |
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return iPacket->DataLimit(); |
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} |
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|
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/** |
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This function is part of the extension pattern and is implemented by all |
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derived instantiable classes that need to extend it's interface. |
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|
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By default this returns null. Any derived class that is required to extend its |
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interface and that of this base class returns its new interface in the form of |
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an M class, that it extends, if and only if the corresponding TUid, aUid, is |
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received. Otherwise the function calls the base class implementation, |
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returning NULL. |
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@return TAny* The M Class representing the extension to the interface |
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otherwise NULL |
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@param aUid The uid associated with the M Class that is being implemented |
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*/ |
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EXPORT_C TAny* CObexReaderBase::GetInterface(TUid /*aUid*/) |
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{ |
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return NULL; |
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} |