2 * Compound Storage (32 bit version)
4 * Implemented using the documentation of the LAOLA project at
5 * <URL:http://wwwwbs.cs.tu-berlin.de/~schwartz/pmh/index.html>
6 * (Thanks to Martin Schwartz <schwartz@cs.tu-berlin.de>)
8 * This include file contains definitions of types and function
9 * prototypes that are used in the many files implementing the
10 * storage functionality
12 * Copyright 1998,1999 Francis Beaudet
13 * Copyright 1998,1999 Thuy Nguyen
14 * Copyright 2010 Vincent Povirk for CodeWeavers
16 * This library is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU Lesser General Public
18 * License as published by the Free Software Foundation; either
19 * version 2.1 of the License, or (at your option) any later version.
21 * This library is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
24 * Lesser General Public License for more details.
26 * You should have received a copy of the GNU Lesser General Public
27 * License along with this library; if not, write to the Free Software
28 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
30 #ifndef __STORAGE32_H__
31 #define __STORAGE32_H__
41 #include "wine/list.h"
44 * Definitions for the file format offsets.
46 static const ULONG OFFSET_MINORVERSION
= 0x00000018;
47 static const ULONG OFFSET_MAJORVERSION
= 0x0000001a;
48 static const ULONG OFFSET_BYTEORDERMARKER
= 0x0000001c;
49 static const ULONG OFFSET_BIGBLOCKSIZEBITS
= 0x0000001e;
50 static const ULONG OFFSET_SMALLBLOCKSIZEBITS
= 0x00000020;
51 static const ULONG OFFSET_DIRSECTORCOUNT
= 0x00000028;
52 static const ULONG OFFSET_BBDEPOTCOUNT
= 0x0000002C;
53 static const ULONG OFFSET_ROOTSTARTBLOCK
= 0x00000030;
54 static const ULONG OFFSET_TRANSACTIONSIG
= 0x00000034;
55 static const ULONG OFFSET_SMALLBLOCKLIMIT
= 0x00000038;
56 static const ULONG OFFSET_SBDEPOTSTART
= 0x0000003C;
57 static const ULONG OFFSET_SBDEPOTCOUNT
= 0x00000040;
58 static const ULONG OFFSET_EXTBBDEPOTSTART
= 0x00000044;
59 static const ULONG OFFSET_EXTBBDEPOTCOUNT
= 0x00000048;
60 static const ULONG OFFSET_BBDEPOTSTART
= 0x0000004C;
61 static const ULONG OFFSET_PS_NAME
= 0x00000000;
62 static const ULONG OFFSET_PS_NAMELENGTH
= 0x00000040;
63 static const ULONG OFFSET_PS_STGTYPE
= 0x00000042;
64 static const ULONG OFFSET_PS_LEFTCHILD
= 0x00000044;
65 static const ULONG OFFSET_PS_RIGHTCHILD
= 0x00000048;
66 static const ULONG OFFSET_PS_DIRROOT
= 0x0000004C;
67 static const ULONG OFFSET_PS_GUID
= 0x00000050;
68 static const ULONG OFFSET_PS_CTIMELOW
= 0x00000064;
69 static const ULONG OFFSET_PS_CTIMEHIGH
= 0x00000068;
70 static const ULONG OFFSET_PS_MTIMELOW
= 0x0000006C;
71 static const ULONG OFFSET_PS_MTIMEHIGH
= 0x00000070;
72 static const ULONG OFFSET_PS_STARTBLOCK
= 0x00000074;
73 static const ULONG OFFSET_PS_SIZE
= 0x00000078;
74 static const WORD DEF_BIG_BLOCK_SIZE_BITS
= 0x0009;
75 static const WORD MIN_BIG_BLOCK_SIZE_BITS
= 0x0009;
76 static const WORD MAX_BIG_BLOCK_SIZE_BITS
= 0x000c;
77 static const WORD DEF_SMALL_BLOCK_SIZE_BITS
= 0x0006;
78 static const WORD DEF_BIG_BLOCK_SIZE
= 0x0200;
79 static const WORD DEF_SMALL_BLOCK_SIZE
= 0x0040;
80 static const ULONG BLOCK_EXTBBDEPOT
= 0xFFFFFFFC;
81 static const ULONG BLOCK_SPECIAL
= 0xFFFFFFFD;
82 static const ULONG BLOCK_END_OF_CHAIN
= 0xFFFFFFFE;
83 static const ULONG BLOCK_UNUSED
= 0xFFFFFFFF;
84 static const ULONG DIRENTRY_NULL
= 0xFFFFFFFF;
86 #define DIRENTRY_NAME_MAX_LEN 0x20
87 #define DIRENTRY_NAME_BUFFER_LEN 0x40
89 #define RAW_DIRENTRY_SIZE 0x00000080
91 #define HEADER_SIZE 512
93 #define MIN_BIG_BLOCK_SIZE 0x200
94 #define MAX_BIG_BLOCK_SIZE 0x1000
97 * Type of child entry link
99 #define DIRENTRY_RELATION_PREVIOUS 0
100 #define DIRENTRY_RELATION_NEXT 1
101 #define DIRENTRY_RELATION_DIR 2
104 * type constant used in files for the root storage
106 #define STGTY_ROOT 0x05
108 #define COUNT_BBDEPOTINHEADER 109
110 /* FIXME: This value is stored in the header, but we hard-code it to 0x1000. */
111 #define LIMIT_TO_USE_SMALL_BLOCK 0x1000
113 #define STGM_ACCESS_MODE(stgm) ((stgm)&0x0000f)
114 #define STGM_SHARE_MODE(stgm) ((stgm)&0x000f0)
115 #define STGM_CREATE_MODE(stgm) ((stgm)&0x0f000)
117 #define STGM_KNOWN_FLAGS (0xf0ff | \
118 STGM_TRANSACTED | STGM_CONVERT | STGM_PRIORITY | STGM_NOSCRATCH | \
119 STGM_NOSNAPSHOT | STGM_DIRECT_SWMR | STGM_DELETEONRELEASE | STGM_SIMPLE)
122 * Forward declarations of all the structures used by the storage
125 typedef struct StorageBaseImpl StorageBaseImpl
;
126 typedef struct StorageBaseImplVtbl StorageBaseImplVtbl
;
127 typedef struct StorageImpl StorageImpl
;
128 typedef struct BlockChainStream BlockChainStream
;
129 typedef struct SmallBlockChainStream SmallBlockChainStream
;
130 typedef struct IEnumSTATSTGImpl IEnumSTATSTGImpl
;
131 typedef struct DirEntry DirEntry
;
132 typedef struct StgStreamImpl StgStreamImpl
;
135 * A reference to a directory entry in the file or a transacted cache.
137 typedef ULONG DirRef
;
140 * This utility structure is used to read/write the information in a directory
145 WCHAR name
[DIRENTRY_NAME_MAX_LEN
];
146 WORD sizeOfNameString
;
158 HRESULT
FileLockBytesImpl_Construct(HANDLE hFile
, DWORD openFlags
, LPCWSTR pwcsName
, ILockBytes
**pLockBytes
) DECLSPEC_HIDDEN
;
160 HRESULT
FileLockBytesImpl_LockRegionSync(ILockBytes
* iface
, ULARGE_INTEGER libOffset
, ULARGE_INTEGER cb
) DECLSPEC_HIDDEN
;
162 /*************************************************************************
163 * Ole Convert support
166 HRESULT
STORAGE_CreateOleStream(IStorage
*, DWORD
) DECLSPEC_HIDDEN
;
167 HRESULT
OLECONVERT_CreateCompObjStream(LPSTORAGE pStorage
, LPCSTR strOleTypeName
) DECLSPEC_HIDDEN
;
176 /****************************************************************************
177 * StorageBaseImpl definitions.
179 * This structure defines the base information contained in all implementations
180 * of IStorage contained in this file storage implementation.
182 * In OOP terms, this is the base class for all the IStorage implementations
183 * contained in this file.
185 struct StorageBaseImpl
187 IStorage IStorage_iface
;
188 IPropertySetStorage IPropertySetStorage_iface
; /* interface for adding a properties stream */
189 IDirectWriterLock IDirectWriterLock_iface
;
193 * Stream tracking list
196 struct list strmHead
;
199 * Storage tracking list
201 struct list storageHead
;
204 * TRUE if this object has been invalidated
209 * Index of the directory entry of this storage
211 DirRef storageDirEntry
;
216 const StorageBaseImplVtbl
*baseVtbl
;
219 * flags that this storage was opened or created with
224 * State bits appear to only be preserved while running. No in the stream
228 BOOL create
; /* Was the storage created or opened.
229 The behaviour of STGM_SIMPLE depends on this */
231 * If this storage was opened in transacted mode, the object that implements
232 * the transacted snapshot or cache.
234 StorageBaseImpl
*transactedChild
;
235 enum swmr_mode lockingrole
;
238 /* virtual methods for StorageBaseImpl objects */
239 struct StorageBaseImplVtbl
{
240 void (*Destroy
)(StorageBaseImpl
*);
241 void (*Invalidate
)(StorageBaseImpl
*);
242 HRESULT (*Flush
)(StorageBaseImpl
*);
243 HRESULT (*GetFilename
)(StorageBaseImpl
*,LPWSTR
*);
244 HRESULT (*CreateDirEntry
)(StorageBaseImpl
*,const DirEntry
*,DirRef
*);
245 HRESULT (*WriteDirEntry
)(StorageBaseImpl
*,DirRef
,const DirEntry
*);
246 HRESULT (*ReadDirEntry
)(StorageBaseImpl
*,DirRef
,DirEntry
*);
247 HRESULT (*DestroyDirEntry
)(StorageBaseImpl
*,DirRef
);
248 HRESULT (*StreamReadAt
)(StorageBaseImpl
*,DirRef
,ULARGE_INTEGER
,ULONG
,void*,ULONG
*);
249 HRESULT (*StreamWriteAt
)(StorageBaseImpl
*,DirRef
,ULARGE_INTEGER
,ULONG
,const void*,ULONG
*);
250 HRESULT (*StreamSetSize
)(StorageBaseImpl
*,DirRef
,ULARGE_INTEGER
);
251 HRESULT (*StreamLink
)(StorageBaseImpl
*,DirRef
,DirRef
);
252 HRESULT (*GetTransactionSig
)(StorageBaseImpl
*,ULONG
*,BOOL
);
253 HRESULT (*SetTransactionSig
)(StorageBaseImpl
*,ULONG
);
254 HRESULT (*LockTransaction
)(StorageBaseImpl
*,BOOL
);
255 HRESULT (*UnlockTransaction
)(StorageBaseImpl
*,BOOL
);
258 static inline void StorageBaseImpl_Destroy(StorageBaseImpl
*This
)
260 This
->baseVtbl
->Destroy(This
);
263 static inline void StorageBaseImpl_Invalidate(StorageBaseImpl
*This
)
265 This
->baseVtbl
->Invalidate(This
);
268 static inline HRESULT
StorageBaseImpl_Flush(StorageBaseImpl
*This
)
270 return This
->baseVtbl
->Flush(This
);
273 static inline HRESULT
StorageBaseImpl_GetFilename(StorageBaseImpl
*This
, LPWSTR
*result
)
275 return This
->baseVtbl
->GetFilename(This
, result
);
278 static inline HRESULT
StorageBaseImpl_CreateDirEntry(StorageBaseImpl
*This
,
279 const DirEntry
*newData
, DirRef
*index
)
281 return This
->baseVtbl
->CreateDirEntry(This
, newData
, index
);
284 static inline HRESULT
StorageBaseImpl_WriteDirEntry(StorageBaseImpl
*This
,
285 DirRef index
, const DirEntry
*data
)
287 return This
->baseVtbl
->WriteDirEntry(This
, index
, data
);
290 static inline HRESULT
StorageBaseImpl_ReadDirEntry(StorageBaseImpl
*This
,
291 DirRef index
, DirEntry
*data
)
293 return This
->baseVtbl
->ReadDirEntry(This
, index
, data
);
296 static inline HRESULT
StorageBaseImpl_DestroyDirEntry(StorageBaseImpl
*This
,
299 return This
->baseVtbl
->DestroyDirEntry(This
, index
);
302 /* Read up to size bytes from this directory entry's stream at the given offset. */
303 static inline HRESULT
StorageBaseImpl_StreamReadAt(StorageBaseImpl
*This
,
304 DirRef index
, ULARGE_INTEGER offset
, ULONG size
, void *buffer
, ULONG
*bytesRead
)
306 return This
->baseVtbl
->StreamReadAt(This
, index
, offset
, size
, buffer
, bytesRead
);
309 /* Write size bytes to this directory entry's stream at the given offset,
310 * growing the stream if necessary. */
311 static inline HRESULT
StorageBaseImpl_StreamWriteAt(StorageBaseImpl
*This
,
312 DirRef index
, ULARGE_INTEGER offset
, ULONG size
, const void *buffer
, ULONG
*bytesWritten
)
314 return This
->baseVtbl
->StreamWriteAt(This
, index
, offset
, size
, buffer
, bytesWritten
);
317 static inline HRESULT
StorageBaseImpl_StreamSetSize(StorageBaseImpl
*This
,
318 DirRef index
, ULARGE_INTEGER newsize
)
320 return This
->baseVtbl
->StreamSetSize(This
, index
, newsize
);
323 /* Make dst point to the same stream that src points to. Other stream operations
324 * will not work properly for entries that point to the same stream, so this
325 * must be a very temporary state, and only one entry pointing to a given stream
326 * may be reachable at any given time. */
327 static inline HRESULT
StorageBaseImpl_StreamLink(StorageBaseImpl
*This
,
328 DirRef dst
, DirRef src
)
330 return This
->baseVtbl
->StreamLink(This
, dst
, src
);
333 static inline HRESULT
StorageBaseImpl_GetTransactionSig(StorageBaseImpl
*This
,
334 ULONG
* result
, BOOL refresh
)
336 return This
->baseVtbl
->GetTransactionSig(This
, result
, refresh
);
339 static inline HRESULT
StorageBaseImpl_SetTransactionSig(StorageBaseImpl
*This
,
342 return This
->baseVtbl
->SetTransactionSig(This
, value
);
345 static inline HRESULT
StorageBaseImpl_LockTransaction(StorageBaseImpl
*This
, BOOL write
)
347 return This
->baseVtbl
->LockTransaction(This
, write
);
350 static inline HRESULT
StorageBaseImpl_UnlockTransaction(StorageBaseImpl
*This
, BOOL write
)
352 return This
->baseVtbl
->UnlockTransaction(This
, write
);
355 /****************************************************************************
356 * StorageBaseImpl stream list handlers
359 void StorageBaseImpl_AddStream(StorageBaseImpl
* stg
, StgStreamImpl
* strm
) DECLSPEC_HIDDEN
;
360 void StorageBaseImpl_RemoveStream(StorageBaseImpl
* stg
, StgStreamImpl
* strm
) DECLSPEC_HIDDEN
;
362 /* Number of BlockChainStream objects to cache in a StorageImpl */
363 #define BLOCKCHAIN_CACHE_SIZE 4
365 /****************************************************************************
366 * Storage32Impl definitions.
368 * This implementation of the IStorage32 interface represents a root
369 * storage. Basically, a document file.
373 struct StorageBaseImpl base
;
378 WORD bigBlockSizeBits
;
379 WORD smallBlockSizeBits
;
381 ULONG smallBlockSize
;
382 ULONG bigBlockDepotCount
;
383 ULONG rootStartBlock
;
384 ULONG smallBlockLimit
;
385 ULONG smallBlockDepotStart
;
386 ULONG extBigBlockDepotStart
;
387 ULONG
*extBigBlockDepotLocations
;
388 ULONG extBigBlockDepotLocationsSize
;
389 ULONG extBigBlockDepotCount
;
390 ULONG bigBlockDepotStart
[COUNT_BBDEPOTINHEADER
];
391 ULONG transactionSig
;
393 ULONG extBlockDepotCached
[MAX_BIG_BLOCK_SIZE
/ 4];
394 ULONG indexExtBlockDepotCached
;
396 ULONG blockDepotCached
[MAX_BIG_BLOCK_SIZE
/ 4];
397 ULONG indexBlockDepotCached
;
400 /* All small blocks before this one are known to be in use. */
401 ULONG firstFreeSmallBlock
;
404 * Abstraction of the big block chains for the chains of the header.
406 BlockChainStream
* rootBlockChain
;
407 BlockChainStream
* smallBlockDepotChain
;
408 BlockChainStream
* smallBlockRootChain
;
410 /* Cache of block chain streams objects for directory entries */
411 BlockChainStream
* blockChainCache
[BLOCKCHAIN_CACHE_SIZE
];
412 UINT blockChainToEvict
;
414 ILockBytes
* lockBytes
;
416 ULONG locked_bytes
[8];
419 HRESULT
StorageImpl_ReadRawDirEntry(
422 BYTE
*buffer
) DECLSPEC_HIDDEN
;
424 void UpdateRawDirEntry(
426 const DirEntry
*newData
) DECLSPEC_HIDDEN
;
428 HRESULT
StorageImpl_WriteRawDirEntry(
431 const BYTE
*buffer
) DECLSPEC_HIDDEN
;
433 HRESULT
StorageImpl_ReadDirEntry(
436 DirEntry
* buffer
) DECLSPEC_HIDDEN
;
438 HRESULT
StorageImpl_WriteDirEntry(
441 const DirEntry
* buffer
) DECLSPEC_HIDDEN
;
443 BlockChainStream
* Storage32Impl_SmallBlocksToBigBlocks(
445 SmallBlockChainStream
** ppsbChain
) DECLSPEC_HIDDEN
;
447 SmallBlockChainStream
* Storage32Impl_BigBlocksToSmallBlocks(
449 BlockChainStream
** ppbbChain
,
450 ULARGE_INTEGER newSize
) DECLSPEC_HIDDEN
;
452 /****************************************************************************
453 * StgStreamImpl definitions.
455 * This class implements the IStream interface and represents a stream
456 * located inside a storage object.
460 IStream IStream_iface
;
464 * We are an entry in the storage object's stream handler list
466 struct list StrmListEntry
;
469 * Storage that is the parent(owner) of the stream
471 StorageBaseImpl
* parentStorage
;
474 * Access mode of this stream.
479 * Index of the directory entry that owns (points to) this stream.
484 * This is the current position of the cursor in the stream
486 ULARGE_INTEGER currentPosition
;
489 static inline StgStreamImpl
*impl_from_IStream( IStream
*iface
)
491 return CONTAINING_RECORD(iface
, StgStreamImpl
, IStream_iface
);
495 * Method definition for the StgStreamImpl class.
497 StgStreamImpl
* StgStreamImpl_Construct(
498 StorageBaseImpl
* parentStorage
,
500 DirRef dirEntry
) DECLSPEC_HIDDEN
;
503 /* Range lock constants.
505 * The storage format reserves the region from 0x7fffff00-0x7fffffff for
506 * locking and synchronization. Unfortuantely, the spec doesn't say which bytes
507 * within that range are used, and for what. These are guesses based on testing.
508 * In particular, ends of ranges may be wrong.
510 0x0 through 0x57: Unknown. Causes read-only exclusive opens to fail.
511 0x58 through 0x6b: Priority mode.
512 0x6c through 0x7f: No snapshot mode.
514 0x81 through 0x91: Priority mode, again. Not sure why it uses two regions.
515 0x92: Lock-checking lock. Held while opening so ranges can be tested without
516 causing spurious failures if others try to grab or test those ranges at the
518 0x93 through 0xa6: Read mode.
519 0xa7 through 0xba: Write mode.
520 0xbb through 0xce: Deny read.
521 0xcf through 0xe2: Deny write.
522 0xe2 through 0xff: Unknown. Causes read-only exclusive opens to fail.
525 #define RANGELOCK_UNK1_FIRST 0x7fffff00
526 #define RANGELOCK_UNK1_LAST 0x7fffff57
527 #define RANGELOCK_PRIORITY1_FIRST 0x7fffff58
528 #define RANGELOCK_PRIORITY1_LAST 0x7fffff6b
529 #define RANGELOCK_NOSNAPSHOT_FIRST 0x7fffff6c
530 #define RANGELOCK_NOSNAPSHOT_LAST 0x7fffff7f
531 #define RANGELOCK_COMMIT 0x7fffff80
532 #define RANGELOCK_PRIORITY2_FIRST 0x7fffff81
533 #define RANGELOCK_PRIORITY2_LAST 0x7fffff91
534 #define RANGELOCK_CHECKLOCKS 0x7fffff92
535 #define RANGELOCK_READ_FIRST 0x7fffff93
536 #define RANGELOCK_READ_LAST 0x7fffffa6
537 #define RANGELOCK_WRITE_FIRST 0x7fffffa7
538 #define RANGELOCK_WRITE_LAST 0x7fffffba
539 #define RANGELOCK_DENY_READ_FIRST 0x7fffffbb
540 #define RANGELOCK_DENY_READ_LAST 0x7fffffce
541 #define RANGELOCK_DENY_WRITE_FIRST 0x7fffffcf
542 #define RANGELOCK_DENY_WRITE_LAST 0x7fffffe2
543 #define RANGELOCK_UNK2_FIRST 0x7fffffe3
544 #define RANGELOCK_UNK2_LAST 0x7fffffff
545 #define RANGELOCK_TRANSACTION_FIRST RANGELOCK_COMMIT
546 #define RANGELOCK_TRANSACTION_LAST RANGELOCK_CHECKLOCKS
547 #define RANGELOCK_FIRST RANGELOCK_UNK1_FIRST
548 #define RANGELOCK_LAST RANGELOCK_UNK2_LAST
551 /******************************************************************************
552 * Endian conversion macros
554 #ifdef WORDS_BIGENDIAN
556 #define htole32(x) RtlUlongByteSwap(x)
557 #define htole16(x) RtlUshortByteSwap(x)
558 #define lendian32toh(x) RtlUlongByteSwap(x)
559 #define lendian16toh(x) RtlUshortByteSwap(x)
563 #define htole32(x) (x)
564 #define htole16(x) (x)
565 #define lendian32toh(x) (x)
566 #define lendian16toh(x) (x)
570 /******************************************************************************
571 * The StorageUtl_ functions are miscellaneous utility functions. Most of which
572 * are abstractions used to read values from file buffers without having to
573 * worry about bit order
575 void StorageUtl_ReadWord(const BYTE
* buffer
, ULONG offset
, WORD
* value
) DECLSPEC_HIDDEN
;
576 void StorageUtl_WriteWord(BYTE
* buffer
, ULONG offset
, WORD value
) DECLSPEC_HIDDEN
;
577 void StorageUtl_ReadDWord(const BYTE
* buffer
, ULONG offset
, DWORD
* value
) DECLSPEC_HIDDEN
;
578 void StorageUtl_WriteDWord(BYTE
* buffer
, ULONG offset
, DWORD value
) DECLSPEC_HIDDEN
;
579 void StorageUtl_ReadULargeInteger(const BYTE
* buffer
, ULONG offset
,
580 ULARGE_INTEGER
* value
) DECLSPEC_HIDDEN
;
581 void StorageUtl_WriteULargeInteger(BYTE
* buffer
, ULONG offset
,
582 const ULARGE_INTEGER
*value
) DECLSPEC_HIDDEN
;
583 void StorageUtl_ReadGUID(const BYTE
* buffer
, ULONG offset
, GUID
* value
) DECLSPEC_HIDDEN
;
584 void StorageUtl_WriteGUID(BYTE
* buffer
, ULONG offset
, const GUID
* value
) DECLSPEC_HIDDEN
;
585 void StorageUtl_CopyDirEntryToSTATSTG(StorageBaseImpl
*storage
,STATSTG
* destination
,
586 const DirEntry
* source
, int statFlags
) DECLSPEC_HIDDEN
;
588 /****************************************************************************
589 * BlockChainStream definitions.
591 * The BlockChainStream class is a utility class that is used to create an
592 * abstraction of the big block chains in the storage file.
596 /* This represents a range of blocks that happen reside in consecutive sectors. */
602 typedef struct BlockChainBlock
608 BYTE data
[MAX_BIG_BLOCK_SIZE
];
611 struct BlockChainStream
613 StorageImpl
* parentStorage
;
614 ULONG
* headOfStreamPlaceHolder
;
615 DirRef ownerDirEntry
;
616 struct BlockChainRun
* indexCache
;
618 ULONG indexCacheSize
;
619 BlockChainBlock cachedBlocks
[2];
626 * Methods for the BlockChainStream class.
628 BlockChainStream
* BlockChainStream_Construct(
629 StorageImpl
* parentStorage
,
630 ULONG
* headOfStreamPlaceHolder
,
631 DirRef dirEntry
) DECLSPEC_HIDDEN
;
633 void BlockChainStream_Destroy(
634 BlockChainStream
* This
) DECLSPEC_HIDDEN
;
636 HRESULT
BlockChainStream_ReadAt(
637 BlockChainStream
* This
,
638 ULARGE_INTEGER offset
,
641 ULONG
* bytesRead
) DECLSPEC_HIDDEN
;
643 HRESULT
BlockChainStream_WriteAt(
644 BlockChainStream
* This
,
645 ULARGE_INTEGER offset
,
648 ULONG
* bytesWritten
) DECLSPEC_HIDDEN
;
650 BOOL
BlockChainStream_SetSize(
651 BlockChainStream
* This
,
652 ULARGE_INTEGER newSize
) DECLSPEC_HIDDEN
;
654 HRESULT
BlockChainStream_Flush(
655 BlockChainStream
* This
) DECLSPEC_HIDDEN
;
657 /****************************************************************************
658 * SmallBlockChainStream definitions.
660 * The SmallBlockChainStream class is a utility class that is used to create an
661 * abstraction of the small block chains in the storage file.
663 struct SmallBlockChainStream
665 StorageImpl
* parentStorage
;
666 DirRef ownerDirEntry
;
667 ULONG
* headOfStreamPlaceHolder
;
671 * Methods of the SmallBlockChainStream class.
673 SmallBlockChainStream
* SmallBlockChainStream_Construct(
674 StorageImpl
* parentStorage
,
675 ULONG
* headOfStreamPlaceHolder
,
676 DirRef dirEntry
) DECLSPEC_HIDDEN
;
678 void SmallBlockChainStream_Destroy(
679 SmallBlockChainStream
* This
) DECLSPEC_HIDDEN
;
681 HRESULT
SmallBlockChainStream_ReadAt(
682 SmallBlockChainStream
* This
,
683 ULARGE_INTEGER offset
,
686 ULONG
* bytesRead
) DECLSPEC_HIDDEN
;
688 HRESULT
SmallBlockChainStream_WriteAt(
689 SmallBlockChainStream
* This
,
690 ULARGE_INTEGER offset
,
693 ULONG
* bytesWritten
) DECLSPEC_HIDDEN
;
695 BOOL
SmallBlockChainStream_SetSize(
696 SmallBlockChainStream
* This
,
697 ULARGE_INTEGER newSize
) DECLSPEC_HIDDEN
;
700 #endif /* __STORAGE32_H__ */