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88 lines
3.5 KiB
88 lines
3.5 KiB
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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//=============================================================================//
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#ifndef ZIP_UTILS_H
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#define ZIP_UTILS_H
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#ifdef _WIN32
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#pragma once
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#endif
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#include "utlsymbol.h"
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class CUtlBuffer;
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#include "tier0/dbg.h"
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abstract_class IZip
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{
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public:
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enum eCompressionType
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{
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// Type of compression used for this file in the zip
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eCompressionType_Unknown = -1,
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eCompressionType_None = 0,
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eCompressionType_LZMA = 14
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};
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virtual void Reset() = 0;
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// Add a single file to a zip - maintains the zip's previous alignment state.
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virtual void AddFileToZip ( const char *relativename, const char *fullpath, eCompressionType compressionType = eCompressionType_None ) = 0;
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// Whether a file is contained in a zip - maintains alignment
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virtual bool FileExistsInZip ( const char *pRelativeName ) = 0;
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// Reads a file from the zip - maintains alignement.
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virtual bool ReadFileFromZip ( const char *pRelativeName, bool bTextMode, CUtlBuffer &buf ) = 0;
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virtual bool ReadFileFromZip ( HANDLE hFile, const char *pRelativeName, bool bTextMode, CUtlBuffer &buf ) = 0;
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// Removes a single file from the zip - maintains alignment
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virtual void RemoveFileFromZip ( const char *relativename ) = 0;
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// Gets next filename in zip, for walking the directory - maintains alignment
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virtual int GetNextFilename ( int id, char *pBuffer, int bufferSize, int &fileSize ) = 0;
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// Prints the zip's contents - maintains alignment
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virtual void PrintDirectory ( void ) = 0;
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// Estimate the size of the Zip (including header, padding, etc.)
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virtual unsigned int EstimateSize ( void ) = 0;
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// Add buffer to zip as a file with given name - uses current alignment size, default 0 (no alignment)
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virtual void AddBufferToZip ( const char *relativename, void *data, int length, bool bTextMode, eCompressionType compressionType = eCompressionType_None ) = 0;
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// Writes out zip file to a buffer - uses current alignment size
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// (set by file's previous alignment, or a call to ForceAlignment)
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virtual void SaveToBuffer ( CUtlBuffer& outbuf ) = 0;
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// Writes out zip file to a filestream - uses current alignment size
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// (set by file's previous alignment, or a call to ForceAlignment)
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virtual void SaveToDisk ( FILE *fout ) = 0;
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virtual void SaveToDisk ( HANDLE hFileOut ) = 0;
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// Reads a zip file from a buffer into memory - sets current alignment size to
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// the file's alignment size, unless overridden by a ForceAlignment call)
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virtual void ParseFromBuffer ( void *buffer, int bufferlength ) = 0;
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// Mounts a zip file from the disk
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// Only ReadFileFromZip() is supported because the zip file could be >2GB
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virtual HANDLE ParseFromDisk ( const char *pFilename ) = 0;
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// Forces a specific alignment size for all subsequent file operations, overriding files' previous alignment size.
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// Return to using files' individual alignment sizes by passing FALSE.
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virtual void ForceAlignment ( bool aligned, bool bCompatibleFormat, unsigned int alignmentSize=0 ) = 0;
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virtual unsigned int GetAlignment() = 0;
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// Sets the endianess of the zip
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virtual void SetBigEndian( bool bigEndian ) = 0;
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virtual void ActivateByteSwapping( bool bActivate ) = 0;
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// Create/Release additional instances
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// Disk Caching is necessary for large zips
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static IZip *CreateZip( const char *pDiskCacheWritePath = NULL, bool bSortByName = false );
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static void ReleaseZip( IZip *zip );
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};
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#endif // ZIP_UTILS_H
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