1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/ossrv/compressionlibs/ziplib/test/oldezlib/EZLib/decompressor.cpp Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,267 @@
1.4 +// Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).
1.5 +// All rights reserved.
1.6 +// This component and the accompanying materials are made available
1.7 +// under the terms of "Eclipse Public License v1.0"
1.8 +// which accompanies this distribution, and is available
1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
1.10 +//
1.11 +// Initial Contributors:
1.12 +// Nokia Corporation - initial contribution.
1.13 +//
1.14 +// Contributors:
1.15 +//
1.16 +// Description:
1.17 +//
1.18 +
1.19 +#include "OldEZDecompressor.h"
1.20 +
1.21 +using namespace TOLDEZLIB;
1.22 +
1.23 +CEZDecompressor::~CEZDecompressor()
1.24 + {
1.25 +
1.26 + // Note inflateEnd may already have been called by zlib if an error occured during inflation.
1.27 + // However nothing bad will happen if it gets called twice.
1.28 +
1.29 + inflateEnd(&iStream);
1.30 + }
1.31 +
1.32 +CEZDecompressor::CEZDecompressor(MEZBufferManager* aInit,const TUint8 *aDictionary, TInt aLength) :
1.33 + iBufferInit(aInit), iDictionary(aDictionary), iDictionaryLength(aLength)
1.34 + {
1.35 +
1.36 + }
1.37 +
1.38 +CEZDecompressor::CEZDecompressor(MEZBufferManager* aInit) :
1.39 + iBufferInit(aInit), iDictionary(NULL), iDictionaryLength(-1)
1.40 + {
1.41 +
1.42 + }
1.43 +
1.44 +
1.45 +void CEZDecompressor::ConstructL(TInt aWindowBits)
1.46 + {
1.47 + iStream.zalloc = Z_NULL;
1.48 + iStream.zfree = Z_NULL;
1.49 + iStream.opaque = Z_NULL;
1.50 +
1.51 + iBufferInit->InitializeL(*this);
1.52 +
1.53 + TInt err = inflateInit2(&iStream,aWindowBits);
1.54 + if (err == Z_VERSION_ERROR)
1.55 + User::Leave(KEZlibErrVersion);
1.56 + else if (err == Z_MEM_ERROR)
1.57 + User::LeaveNoMemory();
1.58 +
1.59 + iInflationState = ENoFlush;
1.60 + }
1.61 +
1.62 +/**
1.63 +Creates a new CEZDecompressor object and leaves it on the CleanupStack
1.64 +
1.65 +@param aInit buffer manager to handle both input and output buffers
1.66 +@param aWindowBits the base two logarithm of the window size (the size of the history buffer). It should
1.67 +be in the range 8..15 for this version of the library. Larger values of this parameter result in better
1.68 +compression at the expense of memory usage.
1.69 +@return the new CEZDecompressor object (on the CleanupStack)
1.70 +*/
1.71 +EXPORT_C CEZDecompressor* CEZDecompressor::NewLC(MEZBufferManager& aInit, TInt aWindowBits)
1.72 + {
1.73 + CEZDecompressor *inf = new (ELeave) CEZDecompressor(&aInit);
1.74 + CleanupStack::PushL(inf);
1.75 + inf->ConstructL(aWindowBits);
1.76 + return inf;
1.77 + }
1.78 +
1.79 +/**
1.80 +Creates a new CEZDecompressor object
1.81 +
1.82 +@param aInit buffer manager to handle both input and output buffers
1.83 +@param aWindowBits the base two logarithm of the window size (the size of the history buffer). It should
1.84 +be in the range 8..15 for this version of the library. Larger values of this parameter result in better
1.85 +compression at the expense of memory usage.
1.86 +@return the new CEZDecompressor object
1.87 +*/
1.88 +EXPORT_C CEZDecompressor* CEZDecompressor::NewL(MEZBufferManager& aInit, TInt aWindowBits)
1.89 + {
1.90 + CEZDecompressor *inf = new (ELeave) CEZDecompressor(&aInit);
1.91 + CleanupStack::PushL(inf);
1.92 + inf->ConstructL(aWindowBits);
1.93 + CleanupStack::Pop();
1.94 + return inf;
1.95 + }
1.96 +
1.97 +/**
1.98 +Overload of CEZDecompressor constructor takes aDictionary argument
1.99 +
1.100 +@param aInit buffer manager to handle both input and output buffers
1.101 +@param aDictionary used to initialize the de-compression dictionary from the given byte sequence. The compressor and
1.102 +decompressor must use exactly the same dictionary.
1.103 +@param aWindowBits the base two logarithm of the window size (the size of the history buffer). It should
1.104 +be in the range 8..15 for this version of the library. Larger values of this parameter result in better
1.105 +compression at the expense of memory usage.
1.106 +@return the new CEZDecompressor object (on the CleanupStack)
1.107 +*/
1.108 +EXPORT_C CEZDecompressor* CEZDecompressor::NewLC(MEZBufferManager& aInit, const TDesC8& aDictionary, TInt aWindowBits)
1.109 + {
1.110 + CEZDecompressor *inf = new (ELeave) CEZDecompressor(&aInit,aDictionary.Ptr(),aDictionary.Size());
1.111 + CleanupStack::PushL(inf);
1.112 + inf->ConstructL(aWindowBits);
1.113 + return inf;
1.114 + }
1.115 +
1.116 +/**
1.117 +Overload of CEZDecompressor constructor takes aDictionary argument
1.118 +
1.119 +@param aInit buffer manager to handle both input and output buffers
1.120 +@param aDictionary used to initialize the de-compression dictionary from the given byte sequence. The compressor and
1.121 +decompressor must use exactly the same dictionary.
1.122 +@param aWindowBits the base two logarithm of the window size (the size of the history buffer). It should
1.123 +be in the range 8..15 for this version of the library. Larger values of this parameter result in better
1.124 +compression at the expense of memory usage.
1.125 +@return the new CEZDecompressor object
1.126 +*/
1.127 +EXPORT_C CEZDecompressor* CEZDecompressor::NewL(MEZBufferManager& aInit, const TDesC8& aDictionary, TInt aWindowBits)
1.128 + {
1.129 + CEZDecompressor *inf = new (ELeave) CEZDecompressor(&aInit,aDictionary.Ptr(),aDictionary.Size());
1.130 + CleanupStack::PushL(inf);
1.131 + inf->ConstructL(aWindowBits);
1.132 + CleanupStack::Pop();
1.133 + return inf;
1.134 + }
1.135 +
1.136 +/**
1.137 +Resets the current de-compression operation, with the new buffer manager
1.138 +
1.139 +@param aInit new buffer manager to handle the new input and output buffers
1.140 +@leave KEZlibErrStream There is a problem with the stream
1.141 +@leave ... Any of the System wide error codes
1.142 +*/
1.143 +EXPORT_C void CEZDecompressor::ResetL(MEZBufferManager& aInit)
1.144 + {
1.145 + iBufferInit = &aInit;
1.146 + iBufferInit->InitializeL(*this);
1.147 + if (inflateReset(&iStream) == Z_STREAM_ERROR)
1.148 + User::Leave(KEZlibErrStream);
1.149 + iInflationState = ENoFlush;
1.150 + }
1.151 +
1.152 +/**
1.153 +De-compress the data to the buffer in stages, return value indicates if the de-compression has finalised
1.154 +or if further calls are necessary
1.155 +
1.156 +@leave KEZlibErrStream There is a problem with the stream
1.157 +@leave KEZlibErrBuf There is a problem with the buffer
1.158 +@leave KEZlibErrData There is a problem with the data
1.159 +@leave KEZlibErrUnexpected Unexpected programming error
1.160 +@leave ... Any of the System wide error codes
1.161 +@return ETrue if the function must be called again, EFalse if compression is finalised
1.162 +*/
1.163 +EXPORT_C TBool CEZDecompressor::InflateL()
1.164 + {
1.165 + TInt err;
1.166 + TBool callAgain = ETrue;
1.167 +
1.168 + switch (iInflationState)
1.169 + {
1.170 + case ENoFlush:
1.171 + err = inflate(&iStream,Z_NO_FLUSH);
1.172 +
1.173 + switch (err)
1.174 + {
1.175 + case Z_STREAM_ERROR:
1.176 + User::Leave(KEZlibErrStream);
1.177 +
1.178 + break;
1.179 +
1.180 + case Z_OK:
1.181 + if (iStream.avail_in == 0)
1.182 + iBufferInit->NeedInputL(*this);
1.183 +
1.184 + if (iStream.avail_out == 0)
1.185 + iBufferInit->NeedOutputL(*this);
1.186 + break;
1.187 +
1.188 + case Z_BUF_ERROR:
1.189 + User::Leave(KEZlibErrBuf);
1.190 + break;
1.191 +
1.192 + case Z_NEED_DICT:
1.193 + SetDictionaryL();
1.194 + break;
1.195 +
1.196 + case Z_STREAM_END:
1.197 + iInflationState = EFinalize;
1.198 + break;
1.199 +
1.200 + case Z_MEM_ERROR:
1.201 + User::LeaveNoMemory();
1.202 + break;
1.203 +
1.204 + case Z_DATA_ERROR:
1.205 + User::Leave(KEZlibErrData);
1.206 + break;
1.207 +
1.208 + default:
1.209 +
1.210 + // there's something wrong with this code if we get here !
1.211 +
1.212 + User::Leave(KEZlibErrUnexpected);
1.213 + break;
1.214 + }
1.215 + break;
1.216 +
1.217 + case EFinalize:
1.218 + iBufferInit->FinalizeL(*this);
1.219 + callAgain = EFalse;
1.220 + iInflationState = ETerminated;
1.221 + break;
1.222 +
1.223 + case ETerminated:
1.224 + User::Leave(KEZlibErrInflateTerminated);
1.225 + }
1.226 +
1.227 + return callAgain;
1.228 + }
1.229 +
1.230 +void CEZDecompressor::SetDictionaryL()
1.231 + {
1.232 + if(!iDictionary || iDictionaryLength < 0)
1.233 + {
1.234 + User::Leave(KEZlibErrData);
1.235 + }
1.236 +
1.237 + TInt err = inflateSetDictionary(&iStream,STATIC_CAST(const Bytef*,iDictionary),iDictionaryLength);
1.238 +
1.239 + if (err == Z_DATA_ERROR)
1.240 + User::Leave(KEZlibErrInflateDictionary);
1.241 + else if (err == Z_STREAM_ERROR)
1.242 + User::Leave(KEZlibErrInflateDictionary);
1.243 +
1.244 + }
1.245 +
1.246 +/**
1.247 +De-compresses the data in the given buffer
1.248 +
1.249 +@param aDestination the target buffer for the de-compressed data
1.250 +@param aSource the buffer containing the compressed data
1.251 +@leave KEZLibErrBuf There is a problem with the buffer
1.252 +@leave KEZLIbErrData There is a problem with the data
1.253 +@leave ... Any of the system wide error codes
1.254 +*/
1.255 +EXPORT_C void CEZDecompressor::DecompressL(TDes8 &aDestination, const TDesC8 &aSource)
1.256 + {
1.257 + uLongf dl = aDestination.MaxSize();
1.258 + Bytef *destinationBuffer = STATIC_CAST(Bytef* , CONST_CAST(TUint8* ,aDestination.Ptr()));
1.259 + const Bytef* sourceBuffer = STATIC_CAST(const Bytef* ,aSource.Ptr());
1.260 + TInt err = uncompress(destinationBuffer,&dl,sourceBuffer,aSource.Size());
1.261 +
1.262 + if (err == Z_MEM_ERROR)
1.263 + User::LeaveNoMemory();
1.264 + else if (err == Z_BUF_ERROR)
1.265 + User::Leave(KEZlibErrBuf);
1.266 + else if (err == Z_DATA_ERROR)
1.267 + User::Leave(KEZlibErrData);
1.268 +
1.269 + aDestination.SetLength(dl);
1.270 + }