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41193de135
Truncating a large stream to less than 0x1000 bytes would cause an unnecessarily expensive conversion.
620 lines
19 KiB
C
620 lines
19 KiB
C
/*
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* Compound Storage (32 bit version)
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*
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* Implemented using the documentation of the LAOLA project at
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* <URL:http://wwwwbs.cs.tu-berlin.de/~schwartz/pmh/index.html>
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* (Thanks to Martin Schwartz <schwartz@cs.tu-berlin.de>)
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*
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* This include file contains definitions of types and function
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* prototypes that are used in the many files implementing the
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* storage functionality
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*
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* Copyright 1998,1999 Francis Beaudet
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* Copyright 1998,1999 Thuy Nguyen
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* Copyright 2010 Vincent Povirk for CodeWeavers
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#ifndef __STORAGE32_H__
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#define __STORAGE32_H__
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#include <stdarg.h>
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#include "windef.h"
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#include "winbase.h"
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#include "winnt.h"
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#include "objbase.h"
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#include "winreg.h"
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#include "winternl.h"
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#include "wine/list.h"
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/*
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* Definitions for the file format offsets.
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*/
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static const ULONG OFFSET_MINORVERSION = 0x00000018;
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static const ULONG OFFSET_MAJORVERSION = 0x0000001a;
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static const ULONG OFFSET_BYTEORDERMARKER = 0x0000001c;
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static const ULONG OFFSET_BIGBLOCKSIZEBITS = 0x0000001e;
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static const ULONG OFFSET_SMALLBLOCKSIZEBITS = 0x00000020;
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static const ULONG OFFSET_DIRSECTORCOUNT = 0x00000028;
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static const ULONG OFFSET_BBDEPOTCOUNT = 0x0000002C;
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static const ULONG OFFSET_ROOTSTARTBLOCK = 0x00000030;
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static const ULONG OFFSET_SMALLBLOCKLIMIT = 0x00000038;
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static const ULONG OFFSET_SBDEPOTSTART = 0x0000003C;
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static const ULONG OFFSET_SBDEPOTCOUNT = 0x00000040;
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static const ULONG OFFSET_EXTBBDEPOTSTART = 0x00000044;
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static const ULONG OFFSET_EXTBBDEPOTCOUNT = 0x00000048;
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static const ULONG OFFSET_BBDEPOTSTART = 0x0000004C;
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static const ULONG OFFSET_PS_NAME = 0x00000000;
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static const ULONG OFFSET_PS_NAMELENGTH = 0x00000040;
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static const ULONG OFFSET_PS_STGTYPE = 0x00000042;
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static const ULONG OFFSET_PS_LEFTCHILD = 0x00000044;
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static const ULONG OFFSET_PS_RIGHTCHILD = 0x00000048;
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static const ULONG OFFSET_PS_DIRROOT = 0x0000004C;
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static const ULONG OFFSET_PS_GUID = 0x00000050;
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static const ULONG OFFSET_PS_CTIMELOW = 0x00000064;
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static const ULONG OFFSET_PS_CTIMEHIGH = 0x00000068;
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static const ULONG OFFSET_PS_MTIMELOW = 0x0000006C;
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static const ULONG OFFSET_PS_MTIMEHIGH = 0x00000070;
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static const ULONG OFFSET_PS_STARTBLOCK = 0x00000074;
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static const ULONG OFFSET_PS_SIZE = 0x00000078;
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static const WORD DEF_BIG_BLOCK_SIZE_BITS = 0x0009;
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static const WORD MIN_BIG_BLOCK_SIZE_BITS = 0x0009;
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static const WORD MAX_BIG_BLOCK_SIZE_BITS = 0x000c;
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static const WORD DEF_SMALL_BLOCK_SIZE_BITS = 0x0006;
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static const WORD DEF_BIG_BLOCK_SIZE = 0x0200;
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static const WORD DEF_SMALL_BLOCK_SIZE = 0x0040;
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static const ULONG BLOCK_EXTBBDEPOT = 0xFFFFFFFC;
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static const ULONG BLOCK_SPECIAL = 0xFFFFFFFD;
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static const ULONG BLOCK_END_OF_CHAIN = 0xFFFFFFFE;
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static const ULONG BLOCK_UNUSED = 0xFFFFFFFF;
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static const ULONG DIRENTRY_NULL = 0xFFFFFFFF;
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#define DIRENTRY_NAME_MAX_LEN 0x20
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#define DIRENTRY_NAME_BUFFER_LEN 0x40
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#define RAW_DIRENTRY_SIZE 0x00000080
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#define HEADER_SIZE 512
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#define MIN_BIG_BLOCK_SIZE 0x200
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#define MAX_BIG_BLOCK_SIZE 0x1000
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/*
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* Type of child entry link
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*/
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#define DIRENTRY_RELATION_PREVIOUS 0
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#define DIRENTRY_RELATION_NEXT 1
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#define DIRENTRY_RELATION_DIR 2
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/*
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* type constant used in files for the root storage
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*/
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#define STGTY_ROOT 0x05
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#define COUNT_BBDEPOTINHEADER 109
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/* FIXME: This value is stored in the header, but we hard-code it to 0x1000. */
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#define LIMIT_TO_USE_SMALL_BLOCK 0x1000
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#define STGM_ACCESS_MODE(stgm) ((stgm)&0x0000f)
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#define STGM_SHARE_MODE(stgm) ((stgm)&0x000f0)
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#define STGM_CREATE_MODE(stgm) ((stgm)&0x0f000)
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#define STGM_KNOWN_FLAGS (0xf0ff | \
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STGM_TRANSACTED | STGM_CONVERT | STGM_PRIORITY | STGM_NOSCRATCH | \
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STGM_NOSNAPSHOT | STGM_DIRECT_SWMR | STGM_DELETEONRELEASE | STGM_SIMPLE)
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/*
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* Forward declarations of all the structures used by the storage
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* module.
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*/
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typedef struct StorageBaseImpl StorageBaseImpl;
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typedef struct StorageBaseImplVtbl StorageBaseImplVtbl;
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typedef struct StorageImpl StorageImpl;
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typedef struct BlockChainStream BlockChainStream;
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typedef struct SmallBlockChainStream SmallBlockChainStream;
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typedef struct IEnumSTATSTGImpl IEnumSTATSTGImpl;
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typedef struct DirEntry DirEntry;
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typedef struct StgStreamImpl StgStreamImpl;
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/*
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* A reference to a directory entry in the file or a transacted cache.
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*/
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typedef ULONG DirRef;
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/*
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* This utility structure is used to read/write the information in a directory
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* entry.
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*/
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struct DirEntry
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{
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WCHAR name[DIRENTRY_NAME_MAX_LEN];
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WORD sizeOfNameString;
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BYTE stgType;
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DirRef leftChild;
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DirRef rightChild;
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DirRef dirRootEntry;
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GUID clsid;
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FILETIME ctime;
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FILETIME mtime;
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ULONG startingBlock;
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ULARGE_INTEGER size;
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};
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HRESULT FileLockBytesImpl_Construct(HANDLE hFile, DWORD openFlags, LPCWSTR pwcsName, ILockBytes **pLockBytes);
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/*************************************************************************
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* Ole Convert support
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*/
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void OLECONVERT_CreateOleStream(LPSTORAGE pStorage);
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HRESULT OLECONVERT_CreateCompObjStream(LPSTORAGE pStorage, LPCSTR strOleTypeName);
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/****************************************************************************
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* Storage32BaseImpl definitions.
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*
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* This structure defines the base information contained in all implementations
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* of IStorage32 contained in this file storage implementation.
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*
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* In OOP terms, this is the base class for all the IStorage32 implementations
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* contained in this file.
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*/
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struct StorageBaseImpl
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{
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const IStorageVtbl *lpVtbl; /* Needs to be the first item in the struct
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* since we want to cast this in a Storage32 pointer */
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const IPropertySetStorageVtbl *pssVtbl; /* interface for adding a properties stream */
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/*
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* Stream tracking list
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*/
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struct list strmHead;
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/*
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* Storage tracking list
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*/
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struct list storageHead;
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/*
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* Reference count of this object
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*/
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LONG ref;
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/*
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* TRUE if this object has been invalidated
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*/
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int reverted;
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/*
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* Index of the directory entry of this storage
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*/
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DirRef storageDirEntry;
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/*
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* virtual methods.
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*/
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const StorageBaseImplVtbl *baseVtbl;
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/*
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* flags that this storage was opened or created with
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*/
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DWORD openFlags;
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/*
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* State bits appear to only be preserved while running. No in the stream
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*/
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DWORD stateBits;
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BOOL create; /* Was the storage created or opened.
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The behaviour of STGM_SIMPLE depends on this */
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/*
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* If this storage was opened in transacted mode, the object that implements
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* the transacted snapshot or cache.
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*/
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StorageBaseImpl *transactedChild;
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};
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/* virtual methods for StorageBaseImpl objects */
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struct StorageBaseImplVtbl {
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void (*Destroy)(StorageBaseImpl*);
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void (*Invalidate)(StorageBaseImpl*);
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HRESULT (*Flush)(StorageBaseImpl*);
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HRESULT (*GetFilename)(StorageBaseImpl*,LPWSTR*);
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HRESULT (*CreateDirEntry)(StorageBaseImpl*,const DirEntry*,DirRef*);
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HRESULT (*WriteDirEntry)(StorageBaseImpl*,DirRef,const DirEntry*);
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HRESULT (*ReadDirEntry)(StorageBaseImpl*,DirRef,DirEntry*);
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HRESULT (*DestroyDirEntry)(StorageBaseImpl*,DirRef);
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HRESULT (*StreamReadAt)(StorageBaseImpl*,DirRef,ULARGE_INTEGER,ULONG,void*,ULONG*);
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HRESULT (*StreamWriteAt)(StorageBaseImpl*,DirRef,ULARGE_INTEGER,ULONG,const void*,ULONG*);
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HRESULT (*StreamSetSize)(StorageBaseImpl*,DirRef,ULARGE_INTEGER);
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HRESULT (*StreamLink)(StorageBaseImpl*,DirRef,DirRef);
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};
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static inline void StorageBaseImpl_Destroy(StorageBaseImpl *This)
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{
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This->baseVtbl->Destroy(This);
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}
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static inline void StorageBaseImpl_Invalidate(StorageBaseImpl *This)
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{
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This->baseVtbl->Invalidate(This);
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}
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static inline HRESULT StorageBaseImpl_Flush(StorageBaseImpl *This)
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{
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return This->baseVtbl->Flush(This);
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}
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static inline HRESULT StorageBaseImpl_GetFilename(StorageBaseImpl *This, LPWSTR *result)
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{
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return This->baseVtbl->GetFilename(This, result);
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}
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static inline HRESULT StorageBaseImpl_CreateDirEntry(StorageBaseImpl *This,
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const DirEntry *newData, DirRef *index)
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{
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return This->baseVtbl->CreateDirEntry(This, newData, index);
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}
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static inline HRESULT StorageBaseImpl_WriteDirEntry(StorageBaseImpl *This,
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DirRef index, const DirEntry *data)
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{
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return This->baseVtbl->WriteDirEntry(This, index, data);
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}
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static inline HRESULT StorageBaseImpl_ReadDirEntry(StorageBaseImpl *This,
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DirRef index, DirEntry *data)
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{
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return This->baseVtbl->ReadDirEntry(This, index, data);
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}
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static inline HRESULT StorageBaseImpl_DestroyDirEntry(StorageBaseImpl *This,
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DirRef index)
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{
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return This->baseVtbl->DestroyDirEntry(This, index);
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}
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/* Read up to size bytes from this directory entry's stream at the given offset. */
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static inline HRESULT StorageBaseImpl_StreamReadAt(StorageBaseImpl *This,
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DirRef index, ULARGE_INTEGER offset, ULONG size, void *buffer, ULONG *bytesRead)
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{
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return This->baseVtbl->StreamReadAt(This, index, offset, size, buffer, bytesRead);
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}
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/* Write size bytes to this directory entry's stream at the given offset,
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* growing the stream if necessary. */
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static inline HRESULT StorageBaseImpl_StreamWriteAt(StorageBaseImpl *This,
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DirRef index, ULARGE_INTEGER offset, ULONG size, const void *buffer, ULONG *bytesWritten)
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{
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return This->baseVtbl->StreamWriteAt(This, index, offset, size, buffer, bytesWritten);
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}
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static inline HRESULT StorageBaseImpl_StreamSetSize(StorageBaseImpl *This,
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DirRef index, ULARGE_INTEGER newsize)
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{
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return This->baseVtbl->StreamSetSize(This, index, newsize);
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}
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/* Make dst point to the same stream that src points to. Other stream operations
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* will not work properly for entries that point to the same stream, so this
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* must be a very temporary state, and only one entry pointing to a given stream
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* may be reachable at any given time. */
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static inline HRESULT StorageBaseImpl_StreamLink(StorageBaseImpl *This,
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DirRef dst, DirRef src)
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{
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return This->baseVtbl->StreamLink(This, dst, src);
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}
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/****************************************************************************
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* StorageBaseImpl stream list handlers
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*/
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void StorageBaseImpl_AddStream(StorageBaseImpl * stg, StgStreamImpl * strm);
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void StorageBaseImpl_RemoveStream(StorageBaseImpl * stg, StgStreamImpl * strm);
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/* Number of BlockChainStream objects to cache in a StorageImpl */
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#define BLOCKCHAIN_CACHE_SIZE 4
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/****************************************************************************
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* Storage32Impl definitions.
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*
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* This implementation of the IStorage32 interface represents a root
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* storage. Basically, a document file.
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*/
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struct StorageImpl
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{
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struct StorageBaseImpl base;
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/*
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* File header
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*/
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WORD bigBlockSizeBits;
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WORD smallBlockSizeBits;
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ULONG bigBlockSize;
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ULONG smallBlockSize;
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ULONG bigBlockDepotCount;
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ULONG rootStartBlock;
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ULONG smallBlockLimit;
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ULONG smallBlockDepotStart;
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ULONG extBigBlockDepotStart;
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ULONG *extBigBlockDepotLocations;
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ULONG extBigBlockDepotLocationsSize;
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ULONG extBigBlockDepotCount;
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ULONG bigBlockDepotStart[COUNT_BBDEPOTINHEADER];
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ULONG extBlockDepotCached[MAX_BIG_BLOCK_SIZE / 4];
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ULONG indexExtBlockDepotCached;
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ULONG blockDepotCached[MAX_BIG_BLOCK_SIZE / 4];
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ULONG indexBlockDepotCached;
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ULONG prevFreeBlock;
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/* All small blocks before this one are known to be in use. */
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ULONG firstFreeSmallBlock;
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/*
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* Abstraction of the big block chains for the chains of the header.
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*/
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BlockChainStream* rootBlockChain;
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BlockChainStream* smallBlockDepotChain;
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BlockChainStream* smallBlockRootChain;
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/* Cache of block chain streams objects for directory entries */
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BlockChainStream* blockChainCache[BLOCKCHAIN_CACHE_SIZE];
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UINT blockChainToEvict;
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ILockBytes* lockBytes;
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};
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HRESULT StorageImpl_ReadRawDirEntry(
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StorageImpl *This,
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ULONG index,
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BYTE *buffer);
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void UpdateRawDirEntry(
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BYTE *buffer,
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const DirEntry *newData);
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HRESULT StorageImpl_WriteRawDirEntry(
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StorageImpl *This,
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ULONG index,
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const BYTE *buffer);
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HRESULT StorageImpl_ReadDirEntry(
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StorageImpl* This,
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DirRef index,
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DirEntry* buffer);
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HRESULT StorageImpl_WriteDirEntry(
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StorageImpl* This,
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DirRef index,
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const DirEntry* buffer);
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BlockChainStream* Storage32Impl_SmallBlocksToBigBlocks(
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StorageImpl* This,
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SmallBlockChainStream** ppsbChain);
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SmallBlockChainStream* Storage32Impl_BigBlocksToSmallBlocks(
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StorageImpl* This,
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BlockChainStream** ppbbChain,
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ULARGE_INTEGER newSize);
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/****************************************************************************
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* StgStreamImpl definitions.
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*
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* This class implements the IStream32 interface and represents a stream
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* located inside a storage object.
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*/
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struct StgStreamImpl
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{
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const IStreamVtbl *lpVtbl; /* Needs to be the first item in the struct
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* since we want to cast this to an IStream pointer */
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/*
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* We are an entry in the storage object's stream handler list
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*/
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struct list StrmListEntry;
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/*
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* Reference count
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*/
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LONG ref;
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/*
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* Storage that is the parent(owner) of the stream
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*/
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StorageBaseImpl* parentStorage;
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/*
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* Access mode of this stream.
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*/
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DWORD grfMode;
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/*
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* Index of the directory entry that owns (points to) this stream.
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*/
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DirRef dirEntry;
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/*
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* This is the current position of the cursor in the stream
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*/
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ULARGE_INTEGER currentPosition;
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};
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/*
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* Method definition for the StgStreamImpl class.
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*/
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StgStreamImpl* StgStreamImpl_Construct(
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StorageBaseImpl* parentStorage,
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DWORD grfMode,
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DirRef dirEntry);
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/******************************************************************************
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* Endian conversion macros
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*/
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#ifdef WORDS_BIGENDIAN
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#define htole32(x) RtlUlongByteSwap(x)
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#define htole16(x) RtlUshortByteSwap(x)
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#define lendian32toh(x) RtlUlongByteSwap(x)
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#define lendian16toh(x) RtlUshortByteSwap(x)
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#else
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#define htole32(x) (x)
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#define htole16(x) (x)
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#define lendian32toh(x) (x)
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#define lendian16toh(x) (x)
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#endif
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/******************************************************************************
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* The StorageUtl_ functions are miscellaneous utility functions. Most of which
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* are abstractions used to read values from file buffers without having to
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* worry about bit order
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*/
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void StorageUtl_ReadWord(const BYTE* buffer, ULONG offset, WORD* value);
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void StorageUtl_WriteWord(BYTE* buffer, ULONG offset, WORD value);
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void StorageUtl_ReadDWord(const BYTE* buffer, ULONG offset, DWORD* value);
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void StorageUtl_WriteDWord(BYTE* buffer, ULONG offset, DWORD value);
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void StorageUtl_ReadULargeInteger(const BYTE* buffer, ULONG offset,
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ULARGE_INTEGER* value);
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void StorageUtl_WriteULargeInteger(BYTE* buffer, ULONG offset,
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const ULARGE_INTEGER *value);
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void StorageUtl_ReadGUID(const BYTE* buffer, ULONG offset, GUID* value);
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void StorageUtl_WriteGUID(BYTE* buffer, ULONG offset, const GUID* value);
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void StorageUtl_CopyDirEntryToSTATSTG(StorageBaseImpl *storage,STATSTG* destination,
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const DirEntry* source, int statFlags);
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/****************************************************************************
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* BlockChainStream definitions.
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*
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* The BlockChainStream class is a utility class that is used to create an
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* abstraction of the big block chains in the storage file.
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*/
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struct BlockChainRun
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{
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/* This represents a range of blocks that happen reside in consecutive sectors. */
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|
ULONG firstSector;
|
|
ULONG firstOffset;
|
|
ULONG lastOffset;
|
|
};
|
|
|
|
typedef struct BlockChainBlock
|
|
{
|
|
ULONG index;
|
|
ULONG sector;
|
|
int read;
|
|
int dirty;
|
|
BYTE data[MAX_BIG_BLOCK_SIZE];
|
|
} BlockChainBlock;
|
|
|
|
struct BlockChainStream
|
|
{
|
|
StorageImpl* parentStorage;
|
|
ULONG* headOfStreamPlaceHolder;
|
|
DirRef ownerDirEntry;
|
|
struct BlockChainRun* indexCache;
|
|
ULONG indexCacheLen;
|
|
ULONG indexCacheSize;
|
|
BlockChainBlock cachedBlocks[2];
|
|
ULONG blockToEvict;
|
|
ULONG tailIndex;
|
|
ULONG numBlocks;
|
|
};
|
|
|
|
/*
|
|
* Methods for the BlockChainStream class.
|
|
*/
|
|
BlockChainStream* BlockChainStream_Construct(
|
|
StorageImpl* parentStorage,
|
|
ULONG* headOfStreamPlaceHolder,
|
|
DirRef dirEntry);
|
|
|
|
void BlockChainStream_Destroy(
|
|
BlockChainStream* This);
|
|
|
|
HRESULT BlockChainStream_ReadAt(
|
|
BlockChainStream* This,
|
|
ULARGE_INTEGER offset,
|
|
ULONG size,
|
|
void* buffer,
|
|
ULONG* bytesRead);
|
|
|
|
HRESULT BlockChainStream_WriteAt(
|
|
BlockChainStream* This,
|
|
ULARGE_INTEGER offset,
|
|
ULONG size,
|
|
const void* buffer,
|
|
ULONG* bytesWritten);
|
|
|
|
BOOL BlockChainStream_SetSize(
|
|
BlockChainStream* This,
|
|
ULARGE_INTEGER newSize);
|
|
|
|
HRESULT BlockChainStream_Flush(
|
|
BlockChainStream* This);
|
|
|
|
/****************************************************************************
|
|
* SmallBlockChainStream definitions.
|
|
*
|
|
* The SmallBlockChainStream class is a utility class that is used to create an
|
|
* abstraction of the small block chains in the storage file.
|
|
*/
|
|
struct SmallBlockChainStream
|
|
{
|
|
StorageImpl* parentStorage;
|
|
DirRef ownerDirEntry;
|
|
ULONG* headOfStreamPlaceHolder;
|
|
};
|
|
|
|
/*
|
|
* Methods of the SmallBlockChainStream class.
|
|
*/
|
|
SmallBlockChainStream* SmallBlockChainStream_Construct(
|
|
StorageImpl* parentStorage,
|
|
ULONG* headOfStreamPlaceHolder,
|
|
DirRef dirEntry);
|
|
|
|
void SmallBlockChainStream_Destroy(
|
|
SmallBlockChainStream* This);
|
|
|
|
HRESULT SmallBlockChainStream_ReadAt(
|
|
SmallBlockChainStream* This,
|
|
ULARGE_INTEGER offset,
|
|
ULONG size,
|
|
void* buffer,
|
|
ULONG* bytesRead);
|
|
|
|
HRESULT SmallBlockChainStream_WriteAt(
|
|
SmallBlockChainStream* This,
|
|
ULARGE_INTEGER offset,
|
|
ULONG size,
|
|
const void* buffer,
|
|
ULONG* bytesWritten);
|
|
|
|
BOOL SmallBlockChainStream_SetSize(
|
|
SmallBlockChainStream* This,
|
|
ULARGE_INTEGER newSize);
|
|
|
|
|
|
#endif /* __STORAGE32_H__ */
|