7zIn.h
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7zIn.h
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	/* 7zIn.h */

	#ifndef __7Z_IN_H
	#define __7Z_IN_H

	#include "7zHeader.h"
	#include "7zItem.h"
	#include "7zAlloc.h"

	typedef struct _CInArchiveInfo
	{
	CFileSize StartPositionAfterHeader;
	CFileSize DataStartPosition;
	}CInArchiveInfo;

	typedef struct _CArchiveDatabaseEx
	{
	CArchiveDatabase Database;
	CInArchiveInfo ArchiveInfo;
	UInt32 *FolderStartPackStreamIndex;
	CFileSize *PackStreamStartPositions;
	UInt32 *FolderStartFileIndex;
	UInt32 *FileIndexToFolderIndexMap;
	}CArchiveDatabaseEx;

	void SzArDbExInit(CArchiveDatabaseEx *db);
	void SzArDbExFree(CArchiveDatabaseEx db, void (freeFunc)(void *));
	CFileSize SzArDbGetFolderStreamPos(CArchiveDatabaseEx *db, UInt32 folderIndex, UInt32 indexInFolder);
	CFileSize SzArDbGetFolderFullPackSize(CArchiveDatabaseEx *db, UInt32 folderIndex);

	typedef struct _ISzInStream
	{
	#ifdef _LZMA_IN_CB
	SZ_RESULT (*Read)(
	void object, / pointer to ISzInStream itself */
	void *buffer, / out: pointer to buffer with data */
	size_t maxRequiredSize, /* max required size to read */
	size_t processedSize); / real processed size.
	processedSize can be less than maxRequiredSize.
	If processedSize == 0, then there are no more
	bytes in stream. */
	#else
	SZ_RESULT (Read)(void object, void buffer, size_t size, size_t processedSize);
	#endif
	SZ_RESULT (Seek)(void object, CFileSize pos);
	} ISzInStream;


	int SzArchiveOpen(
	ISzInStream *inStream,
	CArchiveDatabaseEx *db,
	ISzAlloc *allocMain,
	ISzAlloc *allocTemp);

	#endif