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/*==LICENSE==*
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CyanWorlds.com Engine - MMOG client, server and tools
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Copyright (C) 2011 Cyan Worlds, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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You can contact Cyan Worlds, Inc. by email legal@cyan.com
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or by snail mail at:
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Cyan Worlds, Inc.
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14617 N Newport Hwy
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Mead, WA 99021
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*==LICENSE==*/
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#ifndef plZlibStream_h_inc
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#define plZlibStream_h_inc
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#include "hsStream.h"
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#include "hsStlUtils.h"
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//
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// This is for reading a .gz file from a buffer, and writing the uncompressed data to a file.
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// Call open with the name of the uncompressed file, then call write with the compressed data.
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//
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class plZlibStream : public hsStream
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{
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protected:
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hsStream* fOutput;
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void* fZStream;
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bool fDecompressedOk;
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enum Validate { kNeedMoreData, kInvalidHeader, kValidHeader };
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Validate fHeader;
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std::vector<UInt8> fHeaderCache;
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std::wstring fFilename, fMode; // needed for rewind function
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int IValidateGzHeader(UInt32 byteCount, const void* buffer);
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public:
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plZlibStream();
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virtual ~plZlibStream();
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virtual hsBool Open(const char* filename, const char* mode);
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virtual hsBool Open(const wchar* filename, const wchar* mode);
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virtual hsBool Close();
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virtual UInt32 Write(UInt32 byteCount, const void* buffer);
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// Since most functions don't check the return value from Write, you can
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// call this after you've passed in all your data to determine if it
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// decompressed ok
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bool DecompressedOk() { return fDecompressedOk; }
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// You can't use these
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virtual hsBool AtEnd();
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virtual UInt32 Read(UInt32 byteCount, void* buffer);
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virtual void Skip(UInt32 deltaByteCount);
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virtual void Rewind();
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virtual void FastFwd();
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virtual UInt32 GetEOF();
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};
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#endif // plZlibStream_h_inc
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