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/*
* Compound Storage (32 bit version)
*
* Implemented using the documentation of the LAOLA project at
* <URL:http://wwwwbs.cs.tu-berlin.de/~schwartz/pmh/index.html>
* (Thanks to Martin Schwartz <schwartz@cs.tu-berlin.de>)
*
* This include file contains definitions of types and function
* prototypes that are used in the many files implementing the
* storage functionality
*
* Copyright 1998,1999 Francis Beaudet
* Copyright 1998,1999 Thuy Nguyen
*/
#ifndef __STORAGE32_H__
#define __STORAGE32_H__
/*
* Definitions for the file format offsets.
*/
static const ULONG OFFSET_BIGBLOCKSIZEBITS = 0x0000001e;
static const ULONG OFFSET_SMALLBLOCKSIZEBITS = 0x00000020;
static const ULONG OFFSET_BBDEPOTCOUNT = 0x0000002C;
static const ULONG OFFSET_ROOTSTARTBLOCK = 0x00000030;
static const ULONG OFFSET_SBDEPOTSTART = 0x0000003C;
static const ULONG OFFSET_EXTBBDEPOTSTART = 0x00000044;
static const ULONG OFFSET_EXTBBDEPOTCOUNT = 0x00000048;
static const ULONG OFFSET_BBDEPOTSTART = 0x0000004C;
static const ULONG OFFSET_PS_NAME = 0x00000000;
static const ULONG OFFSET_PS_NAMELENGTH = 0x00000040;
static const ULONG OFFSET_PS_PROPERTYTYPE = 0x00000042;
static const ULONG OFFSET_PS_BLOCKTYPE = 0x00000043;
static const ULONG OFFSET_PS_PREVIOUSPROP = 0x00000044;
static const ULONG OFFSET_PS_NEXTPROP = 0x00000048;
static const ULONG OFFSET_PS_DIRPROP = 0x0000004C;
static const ULONG OFFSET_PS_GUID = 0x00000050;
static const ULONG OFFSET_PS_TSS1 = 0x00000064;
static const ULONG OFFSET_PS_TSD1 = 0x00000068;
static const ULONG OFFSET_PS_TSS2 = 0x0000006C;
static const ULONG OFFSET_PS_TSD2 = 0x00000070;
static const ULONG OFFSET_PS_STARTBLOCK = 0x00000074;
static const ULONG OFFSET_PS_SIZE = 0x00000078;
static const WORD DEF_BIG_BLOCK_SIZE_BITS = 0x0009;
static const WORD DEF_SMALL_BLOCK_SIZE_BITS = 0x0006;
static const WORD DEF_BIG_BLOCK_SIZE = 0x0200;
static const WORD DEF_SMALL_BLOCK_SIZE = 0x0040;
static const ULONG BLOCK_SPECIAL = 0xFFFFFFFD;
static const ULONG BLOCK_END_OF_CHAIN = 0xFFFFFFFE;
static const ULONG BLOCK_UNUSED = 0xFFFFFFFF;
static const ULONG PROPERTY_NULL = 0xFFFFFFFF;
#define PROPERTY_NAME_MAX_LEN 0x20
#define PROPERTY_NAME_BUFFER_LEN 0x40
#define PROPSET_BLOCK_SIZE 0x00000080
/*
* Property type of relation
*/
#define PROPERTY_RELATION_PREVIOUS 0
#define PROPERTY_RELATION_NEXT 1
#define PROPERTY_RELATION_DIR 2
/*
* Property type constants
*/
#define PROPTYPE_STORAGE 0x01
#define PROPTYPE_STREAM 0x02
#define PROPTYPE_ROOT 0x05
/*
* This define allows me to assign a function to a vtable without having the
* nasty warning about incompatible types.
*
* This is necessary because of the usage of implementation classes pointers
* as the first parameter of the interface functions instead of the pointer
* to the interface
*/
#define VTABLE_FUNC(a) ((void*)a)
/*
* These defines assume a hardcoded blocksize. The code will assert
* if the blocksize is different. Some changes will have to be done if it
* becomes the case.
*/
#define BIG_BLOCK_SIZE 0x200
#define COUNT_BBDEPOTINHEADER 109
#define LIMIT_TO_USE_SMALL_BLOCK 0x1000
/*
* These are signatures to detect the type of Document file.
*/
static const BYTE STORAGE_magic[8] ={0xd0,0xcf,0x11,0xe0,0xa1,0xb1,0x1a,0xe1};
static const BYTE STORAGE_oldmagic[8] ={0xd0,0xcf,0x11,0xe0,0x0e,0x11,0xfc,0x0d};
/*
* Forward declarations of all the structures used by the storage
* module.
*/
typedef struct Storage32BaseImpl Storage32BaseImpl;
typedef struct Storage32Impl Storage32Impl;
typedef struct Storage32InternalImpl Storage32InternalImpl;
typedef struct BlockChainStream BlockChainStream;
typedef struct SmallBlockChainStream SmallBlockChainStream;
typedef struct IEnumSTATSTGImpl IEnumSTATSTGImpl;
typedef struct StgProperty StgProperty;
typedef struct StgStreamImpl StgStreamImpl;
/*
* This utility structure is used to read/write the information in a storage
* property.
*/
struct StgProperty
{
WCHAR name[PROPERTY_NAME_MAX_LEN];
WORD sizeOfNameString;
BYTE propertyType;
ULONG previousProperty;
ULONG nextProperty;
ULONG dirProperty;
GUID propertyUniqueID;
ULONG timeStampS1;
ULONG timeStampD1;
ULONG timeStampS2;
ULONG timeStampD2;
ULONG startingBlock;
ULARGE_INTEGER size;
};
/*************************************************************************
* Big Block File support
*
* The big block file is an abstraction of a flat file separated in
* same sized blocks. The implementation for the methods described in
* this section appear in stg_bigblockfile.c
*/
/*
* Declaration of the data structures
*/
typedef struct BigBlockFile BigBlockFile,*LPBIGBLOCKFILE;
typedef struct MappedPage MappedPage,*LPMAPPEDPAGE;
typedef struct BigBlock BigBlock,*LPBIGBLOCK;
struct BigBlockFile
{
ULARGE_INTEGER filesize;
ULONG blocksize;
HANDLE32 hfile;
HANDLE32 hfilemap;
MappedPage *headmap_ro;
MappedPage *headmap_w;
BigBlock *headblock;
};
/*
* Declaration of the functions used to manipulate the BigBlockFile
* data structure.
*/
BigBlockFile* BIGBLOCKFILE_Construct(HANDLE32 hFile, ULONG blocksize);
void BIGBLOCKFILE_Destructor(LPBIGBLOCKFILE This);
void* BIGBLOCKFILE_GetBigBlock(LPBIGBLOCKFILE This, ULONG index);
void* BIGBLOCKFILE_GetROBigBlock(LPBIGBLOCKFILE This, ULONG index);
void BIGBLOCKFILE_ReleaseBigBlock(LPBIGBLOCKFILE This, void *pBlock);
void BIGBLOCKFILE_SetSize(LPBIGBLOCKFILE This, ULARGE_INTEGER newSize);
ULARGE_INTEGER BIGBLOCKFILE_GetSize(LPBIGBLOCKFILE This);
/****************************************************************************
* Storage32BaseImpl definitions.
*
* This stucture defines the base information contained in all implementations
* of IStorage32 contained in this filee storage implementation.
*
* In OOP terms, this is the base class for all the IStorage32 implementations
* contained in this file.
*/
struct Storage32BaseImpl
{
ICOM_VTABLE(IStorage32)* lpvtbl; /* Needs to be the first item in the stuct
* since we want to cast this in a Storage32 pointer */
/*
* Reference count of this object
*/
ULONG ref;
/*
* Ancestor storage (top level)
*/
Storage32Impl* ancestorStorage;
/*
* Index of the property for the root of
* this storage
*/
ULONG rootPropertySetIndex;
/*
* virtual Destructor method.
*/
void (*v_destructor)(Storage32BaseImpl*);
};
/*
* Prototypes for the methods of the Storage32BaseImpl class.
*/
HRESULT WINAPI Storage32BaseImpl_QueryInterface(
Storage32BaseImpl* This,
REFIID riid,
void** ppvObject);
ULONG WINAPI Storage32BaseImpl_AddRef(
Storage32BaseImpl* This);
ULONG WINAPI Storage32BaseImpl_Release(
Storage32BaseImpl* This);
HRESULT WINAPI Storage32BaseImpl_OpenStream(
Storage32BaseImpl* This,
const OLECHAR32* pwcsName, /* [string][in] */
void* reserved1, /* [unique][in] */
DWORD grfMode, /* [in] */
DWORD reserved2, /* [in] */
IStream32** ppstm); /* [out] */
HRESULT WINAPI Storage32BaseImpl_OpenStorage(
Storage32BaseImpl* This,
const OLECHAR32* pwcsName, /* [string][unique][in] */
IStorage32* pstgPriority, /* [unique][in] */
DWORD grfMode, /* [in] */
SNB32 snbExclude, /* [unique][in] */
DWORD reserved, /* [in] */
IStorage32** ppstg); /* [out] */
HRESULT WINAPI Storage32BaseImpl_EnumElements(
Storage32BaseImpl* This,
DWORD reserved1, /* [in] */
void* reserved2, /* [size_is][unique][in] */
DWORD reserved3, /* [in] */
IEnumSTATSTG** ppenum); /* [out] */
HRESULT WINAPI Storage32BaseImpl_Stat(
Storage32BaseImpl* This,
STATSTG* pstatstg, /* [out] */
DWORD grfStatFlag); /* [in] */
HRESULT WINAPI Storage32BaseImpl_RenameElement(
Storage32BaseImpl* This,
const OLECHAR32* pwcsOldName, /* [string][in] */
const OLECHAR32* pwcsNewName); /* [string][in] */
HRESULT WINAPI Storage32BaseImpl_CreateStream(
Storage32BaseImpl* This,
const OLECHAR32* pwcsName, /* [string][in] */
DWORD grfMode, /* [in] */
DWORD reserved1, /* [in] */
DWORD reserved2, /* [in] */
IStream32** ppstm); /* [out] */
HRESULT WINAPI Storage32BaseImpl_SetClass(
Storage32BaseImpl* This,
REFCLSID clsid); /* [in] */
/****************************************************************************
* Storage32Impl definitions.
*
* This implementation of the IStorage32 interface represents a root
* storage. Basically, a document file.
*/
struct Storage32Impl
{
ICOM_VTABLE(IStorage32) *lpvtbl; /* Needs to be the first item in the stuct
* since we want to cast this in a Storage32 pointer */
/*
* Declare the member of the Storage32BaseImpl class to allow
* casting as a Storage32BaseImpl
*/
ULONG ref;
struct Storage32Impl* ancestorStorage;
ULONG rootPropertySetIndex;
void (*v_destructor)(struct Storage32Impl*);
/*
* The following data members are specific to the Storage32Impl
* class
*/
HANDLE32 hFile; /* Physical support for the Docfile */
/*
* File header
*/
WORD bigBlockSizeBits;
WORD smallBlockSizeBits;
ULONG bigBlockSize;
ULONG smallBlockSize;
ULONG bigBlockDepotCount;
ULONG rootStartBlock;
ULONG smallBlockDepotStart;
ULONG extBigBlockDepotStart;
ULONG extBigBlockDepotCount;
ULONG bigBlockDepotStart[COUNT_BBDEPOTINHEADER];
/*
* Abstraction of the big block chains for the chains of the header.
*/
BlockChainStream* rootBlockChain;
BlockChainStream* smallBlockDepotChain;
BlockChainStream* smallBlockRootChain;
/*
* Pointer to the big block file abstraction
*/
BigBlockFile* bigBlockFile;
};
/*
* Method declaration for the Storage32Impl class
*/
HRESULT WINAPI Storage32Impl_CreateStorage(
Storage32Impl* This,
const OLECHAR32* pwcsName, /* [string][in] */
DWORD grfMode, /* [in] */
DWORD dwStgFmt, /* [in] */
DWORD reserved2, /* [in] */
IStorage32** ppstg); /* [out] */
HRESULT WINAPI Storage32Impl_CopyTo(
Storage32Impl* This,
DWORD ciidExclude, /* [in] */
const IID* rgiidExclude, /* [size_is][unique][in] */
SNB32 snbExclude, /* [unique][in] */
IStorage32* pstgDest); /* [unique][in] */
HRESULT WINAPI Storage32Impl_MoveElementTo(
Storage32Impl* This,
const OLECHAR32* pwcsName, /* [string][in] */
IStorage32* pstgDest, /* [unique][in] */
const OLECHAR32* pwcsNewName, /* [string][in] */
DWORD grfFlags); /* [in] */
HRESULT WINAPI Storage32Impl_Commit(
Storage32Impl* This,
DWORD grfCommitFlags); /* [in] */
HRESULT WINAPI Storage32Impl_Revert(
Storage32Impl* This);
HRESULT WINAPI Storage32Impl_DestroyElement(
Storage32Impl* This,
const OLECHAR32* pwcsName); /* [string][in] */
HRESULT WINAPI Storage32Impl_SetElementTimes(
Storage32Impl* This,
const OLECHAR32* pwcsName, /* [string][in] */
const FILETIME* pctime, /* [in] */
const FILETIME* patime, /* [in] */
const FILETIME* pmtime); /* [in] */
HRESULT WINAPI Storage32Impl_SetStateBits(
Storage32Impl* This,
DWORD grfStateBits, /* [in] */
DWORD grfMask); /* [in] */
void Storage32Impl_Destroy(
Storage32Impl* This);
HRESULT Storage32Impl_Construct(
Storage32Impl* This,
HANDLE32 hFile,
DWORD openFlags);
BOOL32 Storage32Impl_ReadBigBlock(
Storage32Impl* This,
ULONG blockIndex,
void* buffer);
BOOL32 Storage32Impl_WriteBigBlock(
Storage32Impl* This,
ULONG blockIndex,
void* buffer);
void* Storage32Impl_GetROBigBlock(
Storage32Impl* This,
ULONG blockIndex);
void* Storage32Impl_GetBigBlock(
Storage32Impl* This,
ULONG blockIndex);
void Storage32Impl_ReleaseBigBlock(
Storage32Impl* This,
void* pBigBlock);
ULONG Storage32Impl_GetNextFreeBigBlock(
Storage32Impl* This);
void Storage32Impl_FreeBigBlock(
Storage32Impl* This,
ULONG blockIndex);
ULONG Storage32Impl_GetNextBlockInChain(
Storage32Impl* This,
ULONG blockIndex);
void Storage32Impl_SetNextBlockInChain(
Storage32Impl* This,
ULONG blockIndex,
ULONG nextBlock);
HRESULT Storage32Impl_LoadFileHeader(
Storage32Impl* This);
void Storage32Impl_SaveFileHeader(
Storage32Impl* This);
BOOL32 Storage32Impl_ReadProperty(
Storage32Impl* This,
ULONG index,
StgProperty* buffer);
BOOL32 Storage32Impl_WriteProperty(
Storage32Impl* This,
ULONG index,
StgProperty* buffer);
BlockChainStream* Storage32Impl_SmallBlocksToBigBlocks(
Storage32Impl* This,
SmallBlockChainStream** ppsbChain);
/****************************************************************************
* Storage32InternalImpl definitions.
*
* Definition of the implementation structure for the IStorage32 interface.
* This one implements the IStorage32 interface for storage that are
* inside another storage.
*/
struct Storage32InternalImpl
{
ICOM_VTABLE(IStorage32) *lpvtbl; /* Needs to be the first item in the stuct
* since we want to cast this in a Storage32 pointer */
/*
* Declare the member of the Storage32BaseImpl class to allow
* casting as a Storage32BaseImpl
*/
ULONG ref;
struct Storage32Impl* ancestorStorage;
ULONG rootPropertySetIndex;
void (*v_destructor)(struct Storage32InternalImpl*);
/*
* There is no specific data for this class.
*/
};
/*
* Method definitions for the Storage32InternalImpl class.
*/
Storage32InternalImpl* Storage32InternalImpl_Construct(
Storage32Impl* ancestorStorage,
ULONG rootTropertyIndex);
void Storage32InternalImpl_Destroy(
Storage32InternalImpl* This);
HRESULT WINAPI Storage32InternalImpl_Commit(
Storage32InternalImpl* This,
DWORD grfCommitFlags); /* [in] */
HRESULT WINAPI Storage32InternalImpl_Revert(
Storage32InternalImpl* This);
/****************************************************************************
* IEnumSTATSTGImpl definitions.
*
* Definition of the implementation structure for the IEnumSTATSTGImpl interface.
* This class allows iterating through the content of a storage and to find
* specific items inside it.
*/
struct IEnumSTATSTGImpl
{
ICOM_VTABLE(IEnumSTATSTG) *lpvtbl; /* Needs to be the first item in the stuct
* since we want to cast this in a IEnumSTATSTG pointer */
ULONG ref; /* Reference count */
Storage32Impl* parentStorage; /* Reference to the parent storage */
ULONG firstPropertyNode; /* Index of the root of the storage to enumerate */
/*
* The current implementation of the IEnumSTATSTGImpl class uses a stack
* to walk the property sets to get the content of a storage. This stack
* is implemented by the following 3 data members
*/
ULONG stackSize;
ULONG stackMaxSize;
ULONG* stackToVisit;
#define ENUMSTATSGT_SIZE_INCREMENT 10
};
/*
* Method definitions for the IEnumSTATSTGImpl class.
*/
HRESULT WINAPI IEnumSTATSTGImpl_QueryInterface(
IEnumSTATSTGImpl* This,
REFIID riid,
void** ppvObject);
ULONG WINAPI IEnumSTATSTGImpl_AddRef(
IEnumSTATSTGImpl* This);
ULONG WINAPI IEnumSTATSTGImpl_Release(
IEnumSTATSTGImpl* This);
HRESULT WINAPI IEnumSTATSTGImpl_Next(
IEnumSTATSTGImpl* This,
ULONG celt,
STATSTG* rgelt,
ULONG* pceltFetched);
HRESULT WINAPI IEnumSTATSTGImpl_Skip(
IEnumSTATSTGImpl* This,
ULONG celt);
HRESULT WINAPI IEnumSTATSTGImpl_Reset(
IEnumSTATSTGImpl* This);
HRESULT WINAPI IEnumSTATSTGImpl_Clone(
IEnumSTATSTGImpl* This,
IEnumSTATSTG** ppenum);
IEnumSTATSTGImpl* IEnumSTATSTGImpl_Construct(
Storage32Impl* This,
ULONG firstPropertyNode);
void IEnumSTATSTGImpl_Destroy(
IEnumSTATSTGImpl* This);
void IEnumSTATSTGImpl_PushSearchNode(
IEnumSTATSTGImpl* This,
ULONG nodeToPush);
ULONG IEnumSTATSTGImpl_PopSearchNode(
IEnumSTATSTGImpl* This,
BOOL32 remove);
ULONG IEnumSTATSTGImpl_FindProperty(
IEnumSTATSTGImpl* This,
const OLECHAR32* lpszPropName,
StgProperty* buffer);
INT32 IEnumSTATSTGImpl_FindParentProperty(
IEnumSTATSTGImpl *This,
ULONG childProperty,
StgProperty *currentProperty,
ULONG *propertyId);
/****************************************************************************
* StgStreamImpl definitions.
*
* This class imlements the IStream32 inteface and represents a stream
* located inside a storage object.
*/
struct StgStreamImpl
{
ICOM_VTABLE(IStream32) *lpvtbl; /* Needs to be the first item in the stuct
* since we want to cast this in a IStream pointer */
/*
* Reference count
*/
ULONG ref;
/*
* Storage that is the parent(owner) of the stream
*/
Storage32BaseImpl* parentStorage;
/*
* Index of the property that owns (points to) this stream.
*/
ULONG ownerProperty;
/*
* Helper variable that contains the size of the stream
*/
ULARGE_INTEGER streamSize;
/*
* This is the current position of the cursor in the stream
*/
ULARGE_INTEGER currentPosition;
/*
* The information in the stream is represented by a chain of small blocks
* or a chain of large blocks. Depending on the case, one of the two
* following variabled points to that information.
*/
BlockChainStream* bigBlockChain;
SmallBlockChainStream* smallBlockChain;
};
/*
* Method definition for the StgStreamImpl class.
*/
StgStreamImpl* StgStreamImpl_Construct(
Storage32BaseImpl* parentStorage,
ULONG ownerProperty);
void StgStreamImpl_Destroy(
StgStreamImpl* This);
void StgStreamImpl_OpenBlockChain(
StgStreamImpl* This);
HRESULT WINAPI StgStreamImpl_QueryInterface(
StgStreamImpl* This,
REFIID riid, /* [in] */
void** ppvObject); /* [iid_is][out] */
ULONG WINAPI StgStreamImpl_AddRef(
StgStreamImpl* This);
ULONG WINAPI StgStreamImpl_Release(
StgStreamImpl* This);
HRESULT WINAPI StgStreamImpl_Read(
StgStreamImpl* This,
void* pv, /* [length_is][size_is][out] */
ULONG cb, /* [in] */
ULONG* pcbRead); /* [out] */
HRESULT WINAPI StgStreamImpl_Write(
StgStreamImpl* This,
const void* pv, /* [size_is][in] */
ULONG cb, /* [in] */
ULONG* pcbWritten); /* [out] */
HRESULT WINAPI StgStreamImpl_Seek(
StgStreamImpl* This,
LARGE_INTEGER dlibMove, /* [in] */
DWORD dwOrigin, /* [in] */
ULARGE_INTEGER* plibNewPosition); /* [out] */
HRESULT WINAPI StgStreamImpl_SetSize(
StgStreamImpl* This,
ULARGE_INTEGER libNewSize); /* [in] */
HRESULT WINAPI StgStreamImpl_CopyTo(
StgStreamImpl* This,
IStream32* pstm, /* [unique][in] */
ULARGE_INTEGER cb, /* [in] */
ULARGE_INTEGER* pcbRead, /* [out] */
ULARGE_INTEGER* pcbWritten); /* [out] */
HRESULT WINAPI StgStreamImpl_Commit(
StgStreamImpl* This,
DWORD grfCommitFlags); /* [in] */
HRESULT WINAPI StgStreamImpl_Revert(
StgStreamImpl* This);
HRESULT WINAPI StgStreamImpl_LockRegion(
StgStreamImpl* This,
ULARGE_INTEGER libOffset, /* [in] */
ULARGE_INTEGER cb, /* [in] */
DWORD dwLockType); /* [in] */
HRESULT WINAPI StgStreamImpl_UnlockRegion(
StgStreamImpl* This,
ULARGE_INTEGER libOffset, /* [in] */
ULARGE_INTEGER cb, /* [in] */
DWORD dwLockType); /* [in] */
HRESULT WINAPI StgStreamImpl_Stat(
StgStreamImpl* This,
STATSTG* pstatstg, /* [out] */
DWORD grfStatFlag); /* [in] */
HRESULT WINAPI StgStreamImpl_Clone(
StgStreamImpl* This,
IStream32** ppstm); /* [out] */
/********************************************************************************
* The StorageUtl_ functions are miscelaneous utility functions. Most of which are
* abstractions used to read values from file buffers without having to worry
* about bit order
*/
void StorageUtl_ReadWord(void* buffer, ULONG offset, WORD* value);
void StorageUtl_WriteWord(void* buffer, ULONG offset, WORD value);
void StorageUtl_ReadDWord(void* buffer, ULONG offset, DWORD* value);
void StorageUtl_WriteDWord(void* buffer, ULONG offset, DWORD value);
void StorageUtl_ReadGUID(void* buffer, ULONG offset, GUID* value);
void StorageUtl_WriteGUID(void* buffer, ULONG offset, GUID* value);
void StorageUtl_CopyPropertyToSTATSTG(STATSTG* destination,
StgProperty* source,
int statFlags);
/****************************************************************************
* BlockChainStream definitions.
*
* The BlockChainStream class is a utility class that is used to create an
* abstraction of the big block chains in the storage file.
*/
struct BlockChainStream
{
Storage32Impl* parentStorage;
ULONG* headOfStreamPlaceHolder;
ULONG ownerPropertyIndex;
};
/*
* Methods for the BlockChainStream class.
*/
BlockChainStream* BlockChainStream_Construct(
Storage32Impl* parentStorage,
ULONG* headOfStreamPlaceHolder,
ULONG propertyIndex);
void BlockChainStream_Destroy(
BlockChainStream* This);
ULONG BlockChainStream_GetHeadOfChain(
BlockChainStream* This);
BOOL32 BlockChainStream_ReadAt(
BlockChainStream* This,
ULARGE_INTEGER offset,
ULONG size,
void* buffer,
ULONG* bytesRead);
BOOL32 BlockChainStream_WriteAt(
BlockChainStream* This,
ULARGE_INTEGER offset,
ULONG size,
const void* buffer,
ULONG* bytesWritten);
BOOL32 BlockChainStream_SetSize(
BlockChainStream* This,
ULARGE_INTEGER newSize);
ULARGE_INTEGER BlockChainStream_GetSize(
BlockChainStream* This);
ULONG BlockChainStream_GetCount(
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
{
Storage32Impl* parentStorage;
ULONG ownerPropertyIndex;
};
/*
* Methods of the SmallBlockChainStream class.
*/
SmallBlockChainStream* SmallBlockChainStream_Construct(
Storage32Impl* parentStorage,
ULONG propertyIndex);
void SmallBlockChainStream_Destroy(
SmallBlockChainStream* This);
ULONG SmallBlockChainStream_GetHeadOfChain(
SmallBlockChainStream* This);
ULONG SmallBlockChainStream_GetNextBlockInChain(
SmallBlockChainStream* This,
ULONG blockIndex);
void SmallBlockChainStream_SetNextBlockInChain(
SmallBlockChainStream* This,
ULONG blockIndex,
ULONG nextBlock);
void SmallBlockChainStream_FreeBlock(
SmallBlockChainStream* This,
ULONG blockIndex);
ULONG SmallBlockChainStream_GetNextFreeBlock(
SmallBlockChainStream* This);
BOOL32 SmallBlockChainStream_ReadAt(
SmallBlockChainStream* This,
ULARGE_INTEGER offset,
ULONG size,
void* buffer,
ULONG* bytesRead);
BOOL32 SmallBlockChainStream_WriteAt(
SmallBlockChainStream* This,
ULARGE_INTEGER offset,
ULONG size,
const void* buffer,
ULONG* bytesWritten);
BOOL32 SmallBlockChainStream_SetSize(
SmallBlockChainStream* This,
ULARGE_INTEGER newSize);
ULARGE_INTEGER SmallBlockChainStream_GetSize(
SmallBlockChainStream* This);
ULONG SmallBlockChainStream_GetCount(
SmallBlockChainStream* This);
#endif __STORAGE32_H__
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