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   1 /*
   2  * Compound Storage (32 bit version)
   3  *
   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>)
   7  *
   8  * This include file contains definitions of types and function
   9  * prototypes that are used in the many files implementing the
  10  * storage functionality
  11  *
  12  * Copyright 1998,1999 Francis Beaudet
  13  * Copyright 1998,1999 Thuy Nguyen
  14  *
  15  * This library is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU Lesser General Public
  17  * License as published by the Free Software Foundation; either
  18  * version 2.1 of the License, or (at your option) any later version.
  19  *
  20  * This library is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  23  * Lesser General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU Lesser General Public
  26  * License along with this library; if not, write to the Free Software
  27  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  28  */
  29 #ifndef __STORAGE32_H__
  30 #define __STORAGE32_H__
  31
  32 #include <stdarg.h>
  33
  34 #include "windef.h"
  35 #include "winbase.h"
  36 #include "winnt.h"
  37 #include "objbase.h"
  38 #include "winreg.h"
  39 #include "winternl.h"
  40 #include "wine/list.h"
  41
  42 /*
  43  * Definitions for the file format offsets.
  44  */
  45 static const ULONG OFFSET_BIGBLOCKSIZEBITS   = 0x0000001e;
  46 static const ULONG OFFSET_SMALLBLOCKSIZEBITS = 0x00000020;
  47 static const ULONG OFFSET_BBDEPOTCOUNT       = 0x0000002C;
  48 static const ULONG OFFSET_ROOTSTARTBLOCK     = 0x00000030;
  49 static const ULONG OFFSET_SBDEPOTSTART       = 0x0000003C;
  50 static const ULONG OFFSET_SBDEPOTCOUNT       = 0x00000040;
  51 static const ULONG OFFSET_EXTBBDEPOTSTART    = 0x00000044;
  52 static const ULONG OFFSET_EXTBBDEPOTCOUNT    = 0x00000048;
  53 static const ULONG OFFSET_BBDEPOTSTART       = 0x0000004C;
  54 static const ULONG OFFSET_PS_NAME            = 0x00000000;
  55 static const ULONG OFFSET_PS_NAMELENGTH      = 0x00000040;
  56 static const ULONG OFFSET_PS_STGTYPE         = 0x00000042;
  57 static const ULONG OFFSET_PS_LEFTCHILD       = 0x00000044;
  58 static const ULONG OFFSET_PS_RIGHTCHILD      = 0x00000048;
  59 static const ULONG OFFSET_PS_DIRROOT         = 0x0000004C;
  60 static const ULONG OFFSET_PS_GUID            = 0x00000050;
  61 static const ULONG OFFSET_PS_CTIMELOW        = 0x00000064;
  62 static const ULONG OFFSET_PS_CTIMEHIGH       = 0x00000068;
  63 static const ULONG OFFSET_PS_MTIMELOW        = 0x0000006C;
  64 static const ULONG OFFSET_PS_MTIMEHIGH       = 0x00000070;
  65 static const ULONG OFFSET_PS_STARTBLOCK      = 0x00000074;
  66 static const ULONG OFFSET_PS_SIZE            = 0x00000078;
  67 static const WORD  DEF_BIG_BLOCK_SIZE_BITS   = 0x0009;
  68 static const WORD  DEF_SMALL_BLOCK_SIZE_BITS = 0x0006;
  69 static const WORD  DEF_BIG_BLOCK_SIZE        = 0x0200;
  70 static const WORD  DEF_SMALL_BLOCK_SIZE      = 0x0040;
  71 static const ULONG BLOCK_EXTBBDEPOT          = 0xFFFFFFFC;
  72 static const ULONG BLOCK_SPECIAL             = 0xFFFFFFFD;
  73 static const ULONG BLOCK_END_OF_CHAIN        = 0xFFFFFFFE;
  74 static const ULONG BLOCK_UNUSED              = 0xFFFFFFFF;
  75 static const ULONG DIRENTRY_NULL             = 0xFFFFFFFF;
  76
  77 #define DIRENTRY_NAME_MAX_LEN    0x20
  78 #define DIRENTRY_NAME_BUFFER_LEN 0x40
  79
  80 #define RAW_DIRENTRY_SIZE 0x00000080
  81
  82 #define HEADER_SIZE 512
  83
  84 #define MIN_BIG_BLOCK_SIZE 0x200
  85 #define MAX_BIG_BLOCK_SIZE 0x1000
  86
  87 /*
  88  * Type of child entry link
  89  */
  90 #define DIRENTRY_RELATION_PREVIOUS 0
  91 #define DIRENTRY_RELATION_NEXT     1
  92 #define DIRENTRY_RELATION_DIR      2
  93
  94 /*
  95  * type constant used in files for the root storage
  96  */
  97 #define STGTY_ROOT 0x05
  98
  99 #define COUNT_BBDEPOTINHEADER    109
 100 #define LIMIT_TO_USE_SMALL_BLOCK 0x1000
 101
 102 #define STGM_ACCESS_MODE(stgm)   ((stgm)&0x0000f)
 103 #define STGM_SHARE_MODE(stgm)    ((stgm)&0x000f0)
 104 #define STGM_CREATE_MODE(stgm)   ((stgm)&0x0f000)
 105
 106 #define STGM_KNOWN_FLAGS (0xf0ff | \
 107      STGM_TRANSACTED | STGM_CONVERT | STGM_PRIORITY | STGM_NOSCRATCH | \
 108      STGM_NOSNAPSHOT | STGM_DIRECT_SWMR | STGM_DELETEONRELEASE | STGM_SIMPLE)
 109
 110 /*
 111  * Forward declarations of all the structures used by the storage
 112  * module.
 113  */
 114 typedef struct StorageBaseImpl     StorageBaseImpl;
 115 typedef struct StorageBaseImplVtbl StorageBaseImplVtbl;
 116 typedef struct StorageImpl         StorageImpl;
 117 typedef struct BlockChainStream      BlockChainStream;
 118 typedef struct SmallBlockChainStream SmallBlockChainStream;
 119 typedef struct IEnumSTATSTGImpl      IEnumSTATSTGImpl;
 120 typedef struct DirEntry              DirEntry;
 121 typedef struct StgStreamImpl         StgStreamImpl;
 122
 123 /*
 124  * A reference to a directory entry in the file or a transacted cache.
 125  */
 126 typedef ULONG DirRef;
 127
 128 /*
 129  * This utility structure is used to read/write the information in a directory
 130  * entry.
 131  */
 132 struct DirEntry
 133 {
 134   WCHAR          name[DIRENTRY_NAME_MAX_LEN];
 135   WORD           sizeOfNameString;
 136   BYTE           stgType;
 137   DirRef         leftChild;
 138   DirRef         rightChild;
 139   DirRef         dirRootEntry;
 140   GUID           clsid;
 141   FILETIME       ctime;
 142   FILETIME       mtime;
 143   ULONG          startingBlock;
 144   ULARGE_INTEGER size;
 145 };
 146
 147 /*************************************************************************
 148  * Big Block File support
 149  *
 150  * The big block file is an abstraction of a flat file separated in
 151  * same sized blocks. The implementation for the methods described in
 152  * this section appear in stg_bigblockfile.c
 153  */
 154
 155 typedef struct BigBlockFile BigBlockFile,*LPBIGBLOCKFILE;
 156
 157 /*
 158  * Declaration of the functions used to manipulate the BigBlockFile
 159  * data structure.
 160  */
 161 BigBlockFile*  BIGBLOCKFILE_Construct(HANDLE hFile,
 162                                       ILockBytes* pLkByt,
 163                                       DWORD openFlags,
 164                                       BOOL fileBased);
 165 void           BIGBLOCKFILE_Destructor(LPBIGBLOCKFILE This);
 166 HRESULT        BIGBLOCKFILE_Expand(LPBIGBLOCKFILE This, ULARGE_INTEGER newSize);
 167 HRESULT        BIGBLOCKFILE_SetSize(LPBIGBLOCKFILE This, ULARGE_INTEGER newSize);
 168 HRESULT        BIGBLOCKFILE_ReadAt(LPBIGBLOCKFILE This, ULARGE_INTEGER offset,
 169            void* buffer, ULONG size, ULONG* bytesRead);
 170 HRESULT        BIGBLOCKFILE_WriteAt(LPBIGBLOCKFILE This, ULARGE_INTEGER offset,
 171            const void* buffer, ULONG size, ULONG* bytesRead);
 172
 173 /*************************************************************************
 174  * Ole Convert support
 175  */
 176
 177 void OLECONVERT_CreateOleStream(LPSTORAGE pStorage);
 178 HRESULT OLECONVERT_CreateCompObjStream(LPSTORAGE pStorage, LPCSTR strOleTypeName);
 179
 180
 181 /****************************************************************************
 182  * Storage32BaseImpl definitions.
 183  *
 184  * This structure defines the base information contained in all implementations
 185  * of IStorage32 contained in this file storage implementation.
 186  *
 187  * In OOP terms, this is the base class for all the IStorage32 implementations
 188  * contained in this file.
 189  */
 190 struct StorageBaseImpl
 191 {
 192   const IStorageVtbl *lpVtbl;    /* Needs to be the first item in the struct
 193                             * since we want to cast this in a Storage32 pointer */
 194
 195   const IPropertySetStorageVtbl *pssVtbl; /* interface for adding a properties stream */
 196
 197   /*
 198    * Stream tracking list
 199    */
 200
 201   struct list strmHead;
 202
 203   /*
 204    * Storage tracking list
 205    */
 206   struct list storageHead;
 207
 208   /*
 209    * Reference count of this object
 210    */
 211   LONG ref;
 212
 213   /*
 214    * TRUE if this object has been invalidated
 215    */
 216   int reverted;
 217
 218   /*
 219    * Index of the directory entry of this storage
 220    */
 221   DirRef storageDirEntry;
 222
 223   /*
 224    * virtual methods.
 225    */
 226   const StorageBaseImplVtbl *baseVtbl;
 227
 228   /*
 229    * flags that this storage was opened or created with
 230    */
 231   DWORD openFlags;
 232
 233   /*
 234    * State bits appear to only be preserved while running. No in the stream
 235    */
 236   DWORD stateBits;
 237
 238   /* If set, this overrides the root storage name returned by IStorage_Stat */
 239   LPCWSTR          filename;
 240
 241   BOOL             create;     /* Was the storage created or opened.
 242                                   The behaviour of STGM_SIMPLE depends on this */
 243   /*
 244    * If this storage was opened in transacted mode, the object that implements
 245    * the transacted snapshot or cache.
 246    */
 247   StorageBaseImpl *transactedChild;
 248 };
 249
 250 /* virtual methods for StorageBaseImpl objects */
 251 struct StorageBaseImplVtbl {
 252   void (*Destroy)(StorageBaseImpl*);
 253   void (*Invalidate)(StorageBaseImpl*);
 254   HRESULT (*CreateDirEntry)(StorageBaseImpl*,const DirEntry*,DirRef*);
 255   HRESULT (*WriteDirEntry)(StorageBaseImpl*,DirRef,const DirEntry*);
 256   HRESULT (*ReadDirEntry)(StorageBaseImpl*,DirRef,DirEntry*);
 257   HRESULT (*DestroyDirEntry)(StorageBaseImpl*,DirRef);
 258   HRESULT (*StreamReadAt)(StorageBaseImpl*,DirRef,ULARGE_INTEGER,ULONG,void*,ULONG*);
 259   HRESULT (*StreamWriteAt)(StorageBaseImpl*,DirRef,ULARGE_INTEGER,ULONG,const void*,ULONG*);
 260   HRESULT (*StreamSetSize)(StorageBaseImpl*,DirRef,ULARGE_INTEGER);
 261 };
 262
 263 static inline void StorageBaseImpl_Destroy(StorageBaseImpl *This)
 264 {
 265   This->baseVtbl->Destroy(This);
 266 }
 267
 268 static inline void StorageBaseImpl_Invalidate(StorageBaseImpl *This)
 269 {
 270   This->baseVtbl->Invalidate(This);
 271 }
 272
 273 static inline HRESULT StorageBaseImpl_CreateDirEntry(StorageBaseImpl *This,
 274   const DirEntry *newData, DirRef *index)
 275 {
 276   return This->baseVtbl->CreateDirEntry(This, newData, index);
 277 }
 278
 279 static inline HRESULT StorageBaseImpl_WriteDirEntry(StorageBaseImpl *This,
 280   DirRef index, const DirEntry *data)
 281 {
 282   return This->baseVtbl->WriteDirEntry(This, index, data);
 283 }
 284
 285 static inline HRESULT StorageBaseImpl_ReadDirEntry(StorageBaseImpl *This,
 286   DirRef index, DirEntry *data)
 287 {
 288   return This->baseVtbl->ReadDirEntry(This, index, data);
 289 }
 290
 291 static inline HRESULT StorageBaseImpl_DestroyDirEntry(StorageBaseImpl *This,
 292   DirRef index)
 293 {
 294   return This->baseVtbl->DestroyDirEntry(This, index);
 295 }
 296
 297 /* Read up to size bytes from this directory entry's stream at the given offset. */
 298 static inline HRESULT StorageBaseImpl_StreamReadAt(StorageBaseImpl *This,
 299   DirRef index, ULARGE_INTEGER offset, ULONG size, void *buffer, ULONG *bytesRead)
 300 {
 301   return This->baseVtbl->StreamReadAt(This, index, offset, size, buffer, bytesRead);
 302 }
 303
 304 /* Write size bytes to this directory entry's stream at the given offset,
 305  * growing the stream if necessary. */
 306 static inline HRESULT StorageBaseImpl_StreamWriteAt(StorageBaseImpl *This,
 307   DirRef index, ULARGE_INTEGER offset, ULONG size, const void *buffer, ULONG *bytesWritten)
 308 {
 309   return This->baseVtbl->StreamWriteAt(This, index, offset, size, buffer, bytesWritten);
 310 }
 311
 312 static inline HRESULT StorageBaseImpl_StreamSetSize(StorageBaseImpl *This,
 313   DirRef index, ULARGE_INTEGER newsize)
 314 {
 315   return This->baseVtbl->StreamSetSize(This, index, newsize);
 316 }
 317
 318 /****************************************************************************
 319  * StorageBaseImpl stream list handlers
 320  */
 321
 322 void StorageBaseImpl_AddStream(StorageBaseImpl * stg, StgStreamImpl * strm);
 323 void StorageBaseImpl_RemoveStream(StorageBaseImpl * stg, StgStreamImpl * strm);
 324
 325 /* Number of BlockChainStream objects to cache in a StorageImpl */
 326 #define BLOCKCHAIN_CACHE_SIZE 4
 327
 328 /****************************************************************************
 329  * Storage32Impl definitions.
 330  *
 331  * This implementation of the IStorage32 interface represents a root
 332  * storage. Basically, a document file.
 333  */
 334 struct StorageImpl
 335 {
 336   struct StorageBaseImpl base;
 337
 338   /*
 339    * The following data members are specific to the Storage32Impl
 340    * class
 341    */
 342   HANDLE           hFile;      /* Physical support for the Docfile */
 343   LPOLESTR         pwcsName;   /* Full path of the document file */
 344
 345   /*
 346    * File header
 347    */
 348   WORD  bigBlockSizeBits;
 349   WORD  smallBlockSizeBits;
 350   ULONG bigBlockSize;
 351   ULONG smallBlockSize;
 352   ULONG bigBlockDepotCount;
 353   ULONG rootStartBlock;
 354   ULONG smallBlockDepotStart;
 355   ULONG extBigBlockDepotStart;
 356   ULONG extBigBlockDepotCount;
 357   ULONG bigBlockDepotStart[COUNT_BBDEPOTINHEADER];
 358
 359   ULONG blockDepotCached[MAX_BIG_BLOCK_SIZE / 4];
 360   ULONG indexBlockDepotCached;
 361   ULONG prevFreeBlock;
 362
 363   /*
 364    * Abstraction of the big block chains for the chains of the header.
 365    */
 366   BlockChainStream* rootBlockChain;
 367   BlockChainStream* smallBlockDepotChain;
 368   BlockChainStream* smallBlockRootChain;
 369
 370   /* Cache of block chain streams objects for directory entries */
 371   BlockChainStream* blockChainCache[BLOCKCHAIN_CACHE_SIZE];
 372   UINT blockChainToEvict;
 373
 374   /*
 375    * Pointer to the big block file abstraction
 376    */
 377   BigBlockFile* bigBlockFile;
 378 };
 379
 380 HRESULT StorageImpl_ReadRawDirEntry(
 381             StorageImpl *This,
 382             ULONG index,
 383             BYTE *buffer);
 384
 385 void UpdateRawDirEntry(
 386     BYTE *buffer,
 387     const DirEntry *newData);
 388
 389 HRESULT StorageImpl_WriteRawDirEntry(
 390             StorageImpl *This,
 391             ULONG index,
 392             const BYTE *buffer);
 393
 394 HRESULT StorageImpl_ReadDirEntry(
 395             StorageImpl*    This,
 396             DirRef          index,
 397             DirEntry*       buffer);
 398
 399 HRESULT StorageImpl_WriteDirEntry(
 400             StorageImpl*        This,
 401             DirRef              index,
 402             const DirEntry*     buffer);
 403
 404 BlockChainStream* Storage32Impl_SmallBlocksToBigBlocks(
 405                       StorageImpl* This,
 406                       SmallBlockChainStream** ppsbChain);
 407
 408 SmallBlockChainStream* Storage32Impl_BigBlocksToSmallBlocks(
 409                       StorageImpl* This,
 410                       BlockChainStream** ppbbChain);
 411
 412 /****************************************************************************
 413  * StgStreamImpl definitions.
 414  *
 415  * This class implements the IStream32 interface and represents a stream
 416  * located inside a storage object.
 417  */
 418 struct StgStreamImpl
 419 {
 420   const IStreamVtbl *lpVtbl;  /* Needs to be the first item in the struct
 421                          * since we want to cast this to an IStream pointer */
 422
 423   /*
 424    * We are an entry in the storage object's stream handler list
 425    */
 426
 427   struct list StrmListEntry;
 428
 429   /*
 430    * Reference count
 431    */
 432   LONG               ref;
 433
 434   /*
 435    * Storage that is the parent(owner) of the stream
 436    */
 437   StorageBaseImpl* parentStorage;
 438
 439   /*
 440    * Access mode of this stream.
 441    */
 442   DWORD grfMode;
 443
 444   /*
 445    * Index of the directory entry that owns (points to) this stream.
 446    */
 447   DirRef             dirEntry;
 448
 449   /*
 450    * This is the current position of the cursor in the stream
 451    */
 452   ULARGE_INTEGER     currentPosition;
 453 };
 454
 455 /*
 456  * Method definition for the StgStreamImpl class.
 457  */
 458 StgStreamImpl* StgStreamImpl_Construct(
 459                 StorageBaseImpl* parentStorage,
 460     DWORD            grfMode,
 461     DirRef           dirEntry);
 462
 463
 464 /******************************************************************************
 465  * Endian conversion macros
 466  */
 467 #ifdef WORDS_BIGENDIAN
 468
 469 #define htole32(x) RtlUlongByteSwap(x)
 470 #define htole16(x) RtlUshortByteSwap(x)
 471 #define lendian32toh(x) RtlUlongByteSwap(x)
 472 #define lendian16toh(x) RtlUshortByteSwap(x)
 473
 474 #else
 475
 476 #define htole32(x) (x)
 477 #define htole16(x) (x)
 478 #define lendian32toh(x) (x)
 479 #define lendian16toh(x) (x)
 480
 481 #endif
 482
 483 /******************************************************************************
 484  * The StorageUtl_ functions are miscellaneous utility functions. Most of which
 485  * are abstractions used to read values from file buffers without having to
 486  * worry about bit order
 487  */
 488 void StorageUtl_ReadWord(const BYTE* buffer, ULONG offset, WORD* value);
 489 void StorageUtl_WriteWord(BYTE* buffer, ULONG offset, WORD value);
 490 void StorageUtl_ReadDWord(const BYTE* buffer, ULONG offset, DWORD* value);
 491 void StorageUtl_WriteDWord(BYTE* buffer, ULONG offset, DWORD value);
 492 void StorageUtl_ReadULargeInteger(const BYTE* buffer, ULONG offset,
 493  ULARGE_INTEGER* value);
 494 void StorageUtl_WriteULargeInteger(BYTE* buffer, ULONG offset,
 495  const ULARGE_INTEGER *value);
 496 void StorageUtl_ReadGUID(const BYTE* buffer, ULONG offset, GUID* value);
 497 void StorageUtl_WriteGUID(BYTE* buffer, ULONG offset, const GUID* value);
 498 void StorageUtl_CopyDirEntryToSTATSTG(StorageBaseImpl *storage,STATSTG* destination,
 499  const DirEntry* source, int statFlags);
 500
 501 /****************************************************************************
 502  * BlockChainStream definitions.
 503  *
 504  * The BlockChainStream class is a utility class that is used to create an
 505  * abstraction of the big block chains in the storage file.
 506  */
 507 struct BlockChainStream
 508 {
 509   StorageImpl* parentStorage;
 510   ULONG*       headOfStreamPlaceHolder;
 511   DirRef       ownerDirEntry;
 512   ULONG        lastBlockNoInSequence;
 513   ULONG        lastBlockNoInSequenceIndex;
 514   ULONG        tailIndex;
 515   ULONG        numBlocks;
 516 };
 517
 518 /*
 519  * Methods for the BlockChainStream class.
 520  */
 521 BlockChainStream* BlockChainStream_Construct(
 522                 StorageImpl* parentStorage,
 523                 ULONG*         headOfStreamPlaceHolder,
 524                 DirRef         dirEntry);
 525
 526 void BlockChainStream_Destroy(
 527                 BlockChainStream* This);
 528
 529 HRESULT BlockChainStream_ReadAt(
 530                 BlockChainStream* This,
 531                 ULARGE_INTEGER offset,
 532                 ULONG          size,
 533                 void*          buffer,
 534                 ULONG*         bytesRead);
 535
 536 HRESULT BlockChainStream_WriteAt(
 537                 BlockChainStream* This,
 538                 ULARGE_INTEGER offset,
 539                 ULONG          size,
 540                 const void*    buffer,
 541                 ULONG*         bytesWritten);
 542
 543 BOOL BlockChainStream_SetSize(
 544                 BlockChainStream* This,
 545                 ULARGE_INTEGER    newSize);
 546
 547 /****************************************************************************
 548  * SmallBlockChainStream definitions.
 549  *
 550  * The SmallBlockChainStream class is a utility class that is used to create an
 551  * abstraction of the small block chains in the storage file.
 552  */
 553 struct SmallBlockChainStream
 554 {
 555   StorageImpl* parentStorage;
 556   DirRef         ownerDirEntry;
 557   ULONG*         headOfStreamPlaceHolder;
 558 };
 559
 560 /*
 561  * Methods of the SmallBlockChainStream class.
 562  */
 563 SmallBlockChainStream* SmallBlockChainStream_Construct(
 564            StorageImpl*   parentStorage,
 565            ULONG*         headOfStreamPlaceHolder,
 566            DirRef         dirEntry);
 567
 568 void SmallBlockChainStream_Destroy(
 569                SmallBlockChainStream* This);
 570
 571 HRESULT SmallBlockChainStream_ReadAt(
 572                SmallBlockChainStream* This,
 573                ULARGE_INTEGER offset,
 574                ULONG          size,
 575                void*          buffer,
 576                ULONG*         bytesRead);
 577
 578 HRESULT SmallBlockChainStream_WriteAt(
 579                SmallBlockChainStream* This,
 580                ULARGE_INTEGER offset,
 581                ULONG          size,
 582                const void*    buffer,
 583                ULONG*         bytesWritten);
 584
 585 BOOL SmallBlockChainStream_SetSize(
 586                SmallBlockChainStream* This,
 587                ULARGE_INTEGER          newSize);
 588
 589
 590 #endif /* __STORAGE32_H__ */