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/*==LICENSE==*
CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
You can contact Cyan Worlds, Inc. by email legal@cyan.com
or by snail mail at:
Cyan Worlds, Inc.
14617 N Newport Hwy
Mead, WA 99021
*==LICENSE==*/
#ifndef plZlibStream_h_inc
#define plZlibStream_h_inc
#include "hsStream.h"
#include "hsStlUtils.h"
//
// This is for reading a .gz file from a buffer, and writing the uncompressed data to a file.
// Call open with the name of the uncompressed file, then call write with the compressed data.
//
class plZlibStream : public hsStream
{
protected:
hsStream* fOutput;
void* fZStream;
bool fDecompressedOk;
enum Validate { kNeedMoreData, kInvalidHeader, kValidHeader };
Validate fHeader;
std::vector<UInt8> fHeaderCache;
std::wstring fFilename, fMode; // needed for rewind function
int IValidateGzHeader(UInt32 byteCount, const void* buffer);
public:
plZlibStream();
virtual ~plZlibStream();
virtual hsBool Open(const char* filename, const char* mode);
virtual hsBool Open(const wchar* filename, const wchar* mode);
virtual hsBool Close();
virtual UInt32 Write(UInt32 byteCount, const void* buffer);
// Since most functions don't check the return value from Write, you can
// call this after you've passed in all your data to determine if it
// decompressed ok
bool DecompressedOk() { return fDecompressedOk; }
// You can't use these
virtual hsBool AtEnd();
virtual UInt32 Read(UInt32 byteCount, void* buffer);
virtual void Skip(UInt32 deltaByteCount);
virtual void Rewind();
virtual void FastFwd();
virtual UInt32 GetEOF();
};
#endif // plZlibStream_h_inc