1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/ossrv/compressionlibs/ziplib/test/oldezlib/inc/OldEZGzip.h Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,257 @@
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 +#ifndef __EZLIB_GZIP_H__
1.20 +#define __EZLIB_GZIP_H__
1.21 +
1.22 +#include "OldEZDecompressor.h"
1.23 +#include "OldEZCompressor.h"
1.24 +#include "OldEZFilebuffer.h"
1.25 +
1.26 +
1.27 +namespace TOLDEZLIB
1.28 +{
1.29 +
1.30 +/**
1.31 +The TEZGZipHeader class encapsulates a zip file header, which is written to the start of the zip
1.32 +file to store various settings of the archive
1.33 +
1.34 +@publishedAll
1.35 +@released
1.36 +*/
1.37 +class TEZGZipHeader
1.38 + {
1.39 +
1.40 +public:
1.41 + IMPORT_C TEZGZipHeader();
1.42 + IMPORT_C ~TEZGZipHeader();
1.43 +
1.44 +public:
1.45 + TUint8 iId1;
1.46 + TUint8 iId2;
1.47 + TUint8 iCompressionMethod;
1.48 + TUint8 iFlags;
1.49 + TInt32 iTime;
1.50 + TUint8 iExtraFlags;
1.51 + TUint8 iOs;
1.52 + TInt16 iXlen;
1.53 + HBufC8* iExtra;
1.54 + HBufC8* iFname;
1.55 + HBufC8* iComment;
1.56 + TInt16 iCrc;
1.57 + };
1.58 +
1.59 +/**
1.60 +The TEZGZipTrailer class encapsulates a zip file trailer, which uses a CRC (cyclic redundancy check) to
1.61 +confirm the validity of the unpacked archive
1.62 +
1.63 +@publishedAll
1.64 +@released
1.65 +*/
1.66 +class TEZGZipTrailer
1.67 + {
1.68 +public:
1.69 + IMPORT_C TEZGZipTrailer();
1.70 + IMPORT_C TEZGZipTrailer(TInt32 aCrc, TInt32 aSize);
1.71 +public:
1.72 + TInt32 iCrc32;
1.73 + TInt32 iSize;
1.74 + };
1.75 +
1.76 +/**
1.77 +The EZGZipFile class handles writing / reading of headers and trailers to / from zip files
1.78 +
1.79 +@publishedAll
1.80 +@released
1.81 +*/
1.82 +class EZGZipFile
1.83 + {
1.84 +public:
1.85 +
1.86 + /** Zip file error codes */
1.87 + enum { ENotGZipFile = KEZlibErrNotGZipFile,
1.88 + EInvalidCompressionMethod = KEZlibErrInvalidCompression,
1.89 + EBadGZipHeader= KEZlibErrBadGZipHeader,
1.90 + EBadGZipTrailer = KEZlibErrBadGZipTrailer,
1.91 + EBadGZipCrc = KEZlibErrBadGZipCrc };
1.92 + /** Flags to determine which part of the header / trailer is being written */
1.93 + enum { EFText = 0, EFHcrc = 1, EFExtra = 2, EFName = 3, EFComment = 4};
1.94 +
1.95 +public:
1.96 + IMPORT_C static void ReadHeaderL(RFile &aFile, TEZGZipHeader &aHeader);
1.97 + IMPORT_C static void WriteHeaderL(RFile &aFile, TEZGZipHeader &aHeader);
1.98 + IMPORT_C static void ReadTrailerL(RFile &aFile, TEZGZipTrailer &aTrailer);
1.99 + IMPORT_C static void WriteTrailerL(RFile &aFile, TEZGZipTrailer &aTrailer);
1.100 + IMPORT_C static void LocateAndReadTrailerL(RFs &aRfs, const TDesC &aFname, TEZGZipTrailer &aTrailer);
1.101 + IMPORT_C static TBool IsGzipFile(RFs &aRfs, const TDesC &aFname);
1.102 + IMPORT_C static TBool IsGzipFileL(RFs &aRfs, const TDesC &aFname);
1.103 +
1.104 +private:
1.105 + static void ReadStringIntoDescriptorL(RFile &aFile, HBufC8 **aDes);
1.106 +
1.107 +public:
1.108 + /** First of the header ID pair */
1.109 + static const TUint8 ID1;
1.110 + /** Second of the header ID pair */
1.111 + static const TUint8 ID2;
1.112 + };
1.113 +
1.114 +/**
1.115 +The CEZFileToGzipBM manages the input and output buffers for compression
1.116 +
1.117 +@publishedAll
1.118 +@released
1.119 +*/
1.120 +NONSHARABLE_CLASS(CEZFileToGzipBM) : public CEZFileBufferManager
1.121 + {
1.122 +public:
1.123 +
1.124 + static CEZFileToGzipBM* NewLC(RFile &aInput, RFile &aOutput, TInt aBufferSize);
1.125 + static CEZFileToGzipBM* NewL(RFile &aInput, RFile &aOutput, TInt aBufferSize);
1.126 +
1.127 + /**
1.128 + Initialise the stream with input and output buffers and starts reading
1.129 +
1.130 + @param aZStream the stream to initialise
1.131 + */
1.132 + virtual void InitializeL(CEZZStream &aZStream);
1.133 +
1.134 + /**
1.135 + Set the stream's input buffer and starts reading
1.136 +
1.137 + @param aZStream the steam whose input buffer to set
1.138 + */
1.139 + virtual void NeedInputL(CEZZStream &aZStream);
1.140 +
1.141 + /**
1.142 + Return the CRC - used for checking validity of the archive
1.143 +
1.144 + @return the CRC value
1.145 + */
1.146 + TInt32 Crc() const { return iCrc; } ;
1.147 +
1.148 +private:
1.149 + CEZFileToGzipBM(RFile &aInput, RFile &aOutput);
1.150 +private:
1.151 + TInt32 iCrc;
1.152 + };
1.153 +
1.154 +/**
1.155 +The CEZGzipToFileBM class manages the input and output buffers for de-compression
1.156 +
1.157 +@publishedAll
1.158 +@released
1.159 +*/
1.160 +NONSHARABLE_CLASS(CEZGzipToFileBM) : public CEZFileBufferManager
1.161 + {
1.162 +public:
1.163 +
1.164 + static CEZGzipToFileBM* NewLC(RFile &aInput, RFile &aOutput, TInt aBufferSize);
1.165 + static CEZGzipToFileBM* NewL(RFile &aInput, RFile &aOutput, TInt aBufferSize);
1.166 +
1.167 + /**
1.168 + Finish writing to the stream
1.169 +
1.170 + @param aZStream the stream to complete writing to
1.171 + */
1.172 + virtual void FinalizeL(CEZZStream &aZStream);
1.173 +
1.174 + /**
1.175 + Set the stream's output buffer and start writing
1.176 +
1.177 + @param aZStream the steam whose output buffer to set
1.178 + */
1.179 + virtual void NeedOutputL(CEZZStream &aZStream);
1.180 +
1.181 + /**
1.182 + Return the CRC - used for checking validity of the archive
1.183 +
1.184 + @return the CRC value
1.185 + */
1.186 + TInt32 Crc() const { return iCrc; } ;
1.187 +
1.188 +private:
1.189 + CEZGzipToFileBM(RFile &aInput, RFile &aOutput);
1.190 +private:
1.191 + TInt32 iCrc;
1.192 + };
1.193 +
1.194 +
1.195 +/**
1.196 +A CEZGZipToFile object allows de-compression of a compressed file.
1.197 +The name of the compressed file is passed into the constructor along with a target file
1.198 +to contain the uncompressed data. The file is uncompressed by calling the InflateL() function.
1.199 +
1.200 +@publishedAll
1.201 +@released
1.202 +*/
1.203 +class CEZGZipToFile : public CBase
1.204 + {
1.205 +public:
1.206 + ~CEZGZipToFile();
1.207 +
1.208 + IMPORT_C static CEZGZipToFile* NewLC(RFs &aRfs, const TDesC &aGzFileName, RFile &aOutput, TInt aBufferSize = 0x8000);
1.209 + IMPORT_C static CEZGZipToFile* NewL(RFs &aRfs, const TDesC &aGzFileName, RFile &aOutput, TInt aBufferSize = 0x8000);
1.210 +
1.211 + IMPORT_C void ResetL(RFs &aRfs, const TDesC &aGzFileName, RFile &aOutput, TInt aBufferSize = 0x8000);
1.212 +
1.213 + IMPORT_C TBool InflateL();
1.214 +
1.215 +private:
1.216 + CEZGZipToFile();
1.217 + void ConstructL(RFs &aRfs, const TDesC &aGzFileName, RFile &aOutput, TInt aBufferSize);
1.218 + void InitialiseBufManL(RFs &aRfs, const TDesC &aGzFileName, RFile &aOutput, TInt aBufferSize);
1.219 +private:
1.220 + CEZDecompressor *iDecompressor;
1.221 + CEZGzipToFileBM *iBufferManager;
1.222 + TEZGZipTrailer iTrailer;
1.223 + RFile iGZipFile;
1.224 + TEZGZipHeader iHeader;
1.225 + };
1.226 +
1.227 +/**
1.228 +A CEZFileToGZip object allows compression of an uncompressed file to a zip file.
1.229 +The uncompressed source file is passed into the constructor along with the name of the target
1.230 +zip file. The file is compressed by calling the DeflateL() function.
1.231 +
1.232 +@publishedAll
1.233 +@released
1.234 +*/
1.235 +class CEZFileToGZip : public CBase
1.236 + {
1.237 +public:
1.238 + ~CEZFileToGZip();
1.239 +
1.240 + IMPORT_C static CEZFileToGZip* NewLC(RFs &aRfs, const TDesC &aGzFileName, RFile &aInput, TInt aBufferSize = 0x8000);
1.241 + IMPORT_C static CEZFileToGZip* NewL(RFs &aRfs, const TDesC &aGzFileName, RFile &aInput, TInt aBufferSize = 0x8000);
1.242 +
1.243 + IMPORT_C void ResetL(RFs &aRfs, const TDesC &aGzFileName, RFile &aInput, TInt aBufferSize = 0x8000);
1.244 +
1.245 + IMPORT_C TBool DeflateL();
1.246 +
1.247 +private:
1.248 + CEZFileToGZip();
1.249 + void ConstructL(RFs &aRfs, const TDesC &aGzFileName, RFile &aInput, TInt aBufferSize);
1.250 + void InitialiseBufManL(RFs &aRfs, const TDesC &aGzFileName, RFile &aInput, TInt aBufferSize);
1.251 +private:
1.252 + CEZCompressor *iCompressor;
1.253 + CEZFileToGzipBM *iBufferManager;
1.254 + TInt iUncompressedDataSize;
1.255 + RFile iGZipFile;
1.256 + TEZGZipHeader iHeader;
1.257 + };
1.258 +
1.259 +}// namespace TOLDEZLIB
1.260 +#endif