khanat-opennel-code/code/ryzom/client/src/login_xdelta.h

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// Ryzom - MMORPG Framework <http://dev.ryzom.com/projects/ryzom/>
// Copyright (C) 2010 Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#ifndef CL_LOGIN_XDELTA_H
#define CL_LOGIN_XDELTA_H
#include "nel/misc/types_nl.h"
#include "nel/misc/md5.h"
#include <string>
#include <zlib.h>
#define XDELTA_PREFIX_LEN 8
#define XDELTA_HEADER_WORDS 6
#define XDELTA_HEADER_SPACE (XDELTA_HEADER_WORDS*4)
#define XDELTA_110_PREFIX "%XDZ004%"
#define XDELTA_FLAG_NO_VERIFY 1
#define XDELTA_FLAG_FROM_COMPRESSED 2
#define XDELTA_FLAG_TO_COMPRESSED 4
#define XDELTA_FLAG_PATCH_COMPRESSED 8
#define XDELTA_TYPE_CHECKSUM ((1<<(1+8))+3)
#define XDELTA_TYPE_INDEX ((1<<(2+8))+3)
#define XDELTA_TYPE_SOURCEINFO ((1<<(3+8))+3)
#define XDELTA_TYPE_CONTROL ((1<<(7+8))+3)
#define XDELTA_TYPE_INSTRUCTION ((1<<(8+8))+3)
class CXDPFileReader;
/**
* Class representing the xdelta control
* it can be 2 sources max : the patch and the file to patch
* Applying patch is copying from the source 'Index' at offset 'Offset' an amount of data
* of length 'Length'.
* \author Matthieu 'TrapII' Besson
* \author Nevrax France
* \date July 2004
*/
struct SXDeltaCtrl
{
struct SSourceInfo
{
std::string Name;
NLMISC::CHashKeyMD5 MD5;
uint32 Len;
bool IsData;
bool Sequential;
uint32 Position;
uint32 Copies;
uint32 CopyLength;
bool read(CXDPFileReader &fr);
};
struct SInstruction
{
uint32 Index;
uint32 Offset;
uint32 Length;
bool read(CXDPFileReader &fr);
};
NLMISC::CHashKeyMD5 ToMD5;
uint32 ToLen;
bool HasData;
std::vector<SSourceInfo> SourceInfo;
std::vector<SInstruction> Inst;
bool read(CXDPFileReader &fr);
};
/**
* Class representing a delta patch
* We read only the 1.1 version. 'Compressed From' and 'Compressed To' are not supported.
* \author Matthieu 'TrapII' Besson
* \author Nevrax France
* \date July 2004
*/
class CXDeltaPatch
{
public:
enum TApplyResult
{
ApplyResult_Ok = 0,
ApplyResult_DiskFull,
ApplyResult_WriteError,
ApplyResult_UnsupportedXDeltaFormat,
ApplyResult_Error, // misc error
};
// Callback progress for the file patching
class ICallBack
{
public:
// f is from 0 to 1 (0% to 100% (complete))
virtual void progress(float f)=0;
};
// Tools
static TApplyResult apply( const std::string &sPatchFilename, const std::string &sFileToPatchFilename,
const std::string &sOutputFilename, std::string &errorMsg, ICallBack *pCallBack = NULL);
static bool info(const std::string &sPatchFilename);
// Load a patch file
bool load(const std::string &sFilename);
TApplyResult apply(const std::string &sFileToPatch, const std::string &sFileOutput, std::string &errorMsg);
bool isNoVerify() { return (_Flags&XDELTA_FLAG_NO_VERIFY)!=0; }
bool isFromCompressed() { return (_Flags&XDELTA_FLAG_FROM_COMPRESSED)!=0; }
bool isToCompressed() { return (_Flags&XDELTA_FLAG_TO_COMPRESSED)!=0; }
bool isPatchCompressed() { return (_Flags&XDELTA_FLAG_PATCH_COMPRESSED)!=0; }
const std::string &getToName() const { return _ToName; }
const std::string &getFromName() const { return _FromName; }
const SXDeltaCtrl &getCtrl() const { return _Ctrl; }
bool checkIntegrity (CXDPFileReader &rFR, const NLMISC::CHashKeyMD5 &md5, uint32 nLength);
private:
std::string _FileName;
uint32 _Flags;
std::string _Version; // Look XDELTA_FLAG_*
uint32 _HeaderOffset;
uint32 _CtrlOffset;
std::string _FromName;
std::string _ToName;
SXDeltaCtrl _Ctrl;
static ICallBack *_CallBack;
};
/**
* Class representing a stream
* Help us to read from zipped or not file seemlessly
* \author Matthieu 'TrapII' Besson
* \author Nevrax France
* \date July 2004
*/
class CXDPFileReader
{
public:
CXDPFileReader();
~CXDPFileReader();
bool init(const std::string &sFilename, sint32 nLowerBound, sint32 nUpperBound, bool bCompressed);
bool read(uint8 *pBuf, sint32 nSize);
bool readUInt32(uint32 &val);
bool readUInt(uint32 &val);
bool readBool(bool &val);
bool readString(std::string &s);
uint32 getFileSize();
bool seek(uint32 pos);
private:
sint32 _LowerBound, _UpperBound;
bool _Compressed;
FILE *_File;
gzFile _GzFile;
void freeZipMem();
bool _Optimize;
uint32 _OptimPage;
std::vector<uint8*> _ZipMem;
sint32 _Pos;
};
#endif // CL_LOGIN_XDELTA_H