dlls/ole32/storage32.h

   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 /*
  83  * Type of child entry link
  84  */
  85 #define DIRENTRY_RELATION_PREVIOUS 0
  86 #define DIRENTRY_RELATION_NEXT     1
  87 #define DIRENTRY_RELATION_DIR      2
  88
  89 /*
  90  * type constant used in files for the root storage
  91  */
  92 #define STGTY_ROOT 0x05
  93
  94 /*
  95  * These defines assume a hardcoded blocksize. The code will assert
  96  * if the blocksize is different. Some changes will have to be done if it
  97  * becomes the case.
  98  */
  99 #define BIG_BLOCK_SIZE           0x200
 100 #define COUNT_BBDEPOTINHEADER    109
 101 #define LIMIT_TO_USE_SMALL_BLOCK 0x1000
 102 #define NUM_BLOCKS_PER_DEPOT_BLOCK 128
 103
 104 #define STGM_ACCESS_MODE(stgm)   ((stgm)&0x0000f)
 105 #define STGM_SHARE_MODE(stgm)    ((stgm)&0x000f0)
 106 #define STGM_CREATE_MODE(stgm)   ((stgm)&0x0f000)
 107
 108 #define STGM_KNOWN_FLAGS (0xf0ff | \
 109      STGM_TRANSACTED | STGM_CONVERT | STGM_PRIORITY | STGM_NOSCRATCH | \
 110      STGM_NOSNAPSHOT | STGM_DIRECT_SWMR | STGM_DELETEONRELEASE | STGM_SIMPLE)
 111
 112 /*
 113  * Forward declarations of all the structures used by the storage
 114  * module.
 115  */
 116 typedef struct StorageBaseImpl     StorageBaseImpl;
 117 typedef struct StorageBaseImplVtbl StorageBaseImplVtbl;
 118 typedef struct StorageImpl         StorageImpl;
 119 typedef struct BlockChainStream      BlockChainStream;
 120 typedef struct SmallBlockChainStream SmallBlockChainStream;
 121 typedef struct IEnumSTATSTGImpl      IEnumSTATSTGImpl;
 122 typedef struct DirEntry              DirEntry;
 123 typedef struct StgStreamImpl         StgStreamImpl;
 124
 125 /*
 126  * A reference to a directory entry in the file or a transacted cache.
 127  */
 128 typedef ULONG DirRef;
 129
 130 /*
 131  * This utility structure is used to read/write the information in a directory
 132  * entry.
 133  */
 134 struct DirEntry
 135 {
 136   WCHAR          name[DIRENTRY_NAME_MAX_LEN];
 137   WORD           sizeOfNameString;
 138   BYTE           stgType;
 139   DirRef         leftChild;
 140   DirRef         rightChild;
 141   DirRef         dirRootEntry;
 142   GUID           clsid;
 143   FILETIME       ctime;
 144   FILETIME       mtime;
 145   ULONG          startingBlock;
 146   ULARGE_INTEGER size;
 147 };
 148
 149 /*************************************************************************
 150  * Big Block File support
 151  *
 152  * The big block file is an abstraction of a flat file separated in
 153  * same sized blocks. The implementation for the methods described in
 154  * this section appear in stg_bigblockfile.c
 155  */
 156
 157 typedef struct BigBlockFile BigBlockFile,*LPBIGBLOCKFILE;
 158
 159 /*
 160  * Declaration of the functions used to manipulate the BigBlockFile
 161  * data structure.
 162  */
 163 BigBlockFile*  BIGBLOCKFILE_Construct(HANDLE hFile,
 164                                       ILockBytes* pLkByt,
 165                                       DWORD openFlags,
 166                                       ULONG blocksize,
 167                                       BOOL fileBased);
 168 void           BIGBLOCKFILE_Destructor(LPBIGBLOCKFILE This);
 169 HRESULT        BIGBLOCKFILE_EnsureExists(LPBIGBLOCKFILE This, ULONG index);
 170 HRESULT        BIGBLOCKFILE_SetSize(LPBIGBLOCKFILE This, ULARGE_INTEGER newSize);
 171 HRESULT        BIGBLOCKFILE_ReadAt(LPBIGBLOCKFILE This, ULARGE_INTEGER offset,
 172            void* buffer, ULONG size, ULONG* bytesRead);
 173 HRESULT        BIGBLOCKFILE_WriteAt(LPBIGBLOCKFILE This, ULARGE_INTEGER offset,
 174            const void* buffer, ULONG size, ULONG* bytesRead);
 175
 176 /*************************************************************************
 177  * Ole Convert support
 178  */
 179
 180 void OLECONVERT_CreateOleStream(LPSTORAGE pStorage);
 181 HRESULT OLECONVERT_CreateCompObjStream(LPSTORAGE pStorage, LPCSTR strOleTypeName);
 182
 183
 184 /****************************************************************************
 185  * Storage32BaseImpl definitions.
 186  *
 187  * This structure defines the base information contained in all implementations
 188  * of IStorage32 contained in this file storage implementation.
 189  *
 190  * In OOP terms, this is the base class for all the IStorage32 implementations
 191  * contained in this file.
 192  */
 193 struct StorageBaseImpl
 194 {
 195   const IStorageVtbl *lpVtbl;    /* Needs to be the first item in the struct
 196                             * since we want to cast this in a Storage32 pointer */
 197
 198   const IPropertySetStorageVtbl *pssVtbl; /* interface for adding a properties stream */
 199
 200   /*
 201    * Stream tracking list
 202    */
 203
 204   struct list strmHead;
 205
 206   /*
 207    * Storage tracking list
 208    */
 209   struct list storageHead;
 210
 211   /*
 212    * Reference count of this object
 213    */
 214   LONG ref;
 215
 216   /*
 217    * Ancestor storage (top level)
 218    */
 219   StorageImpl* ancestorStorage;
 220
 221   /*
 222    * Index of the directory entry of this storage
 223    */
 224   DirRef storageDirEntry;
 225
 226   /*
 227    * virtual methods.
 228    */
 229   const StorageBaseImplVtbl *baseVtbl;
 230
 231   /*
 232    * flags that this storage was opened or created with
 233    */
 234   DWORD openFlags;
 235
 236   /*
 237    * State bits appear to only be preserved while running. No in the stream
 238    */
 239   DWORD stateBits;
 240
 241   /* If set, this overrides the root storage name returned by IStorage_Stat */
 242   WCHAR            filename[DIRENTRY_NAME_BUFFER_LEN];
 243
 244   BOOL             create;     /* Was the storage created or opened.
 245                                   The behaviour of STGM_SIMPLE depends on this */
 246 };
 247
 248 /* virtual methods for StorageBaseImpl objects */
 249 struct StorageBaseImplVtbl {
 250   void (*Destroy)(StorageBaseImpl*);
 251 };
 252
 253 static inline void StorageBaseImpl_Destroy(StorageBaseImpl *This)
 254 {
 255   This->baseVtbl->Destroy(This);
 256 }
 257
 258 /****************************************************************************
 259  * StorageBaseImpl stream list handlers
 260  */
 261
 262 void StorageBaseImpl_AddStream(StorageBaseImpl * stg, StgStreamImpl * strm);
 263 void StorageBaseImpl_RemoveStream(StorageBaseImpl * stg, StgStreamImpl * strm);
 264
 265 /****************************************************************************
 266  * Storage32Impl definitions.
 267  *
 268  * This implementation of the IStorage32 interface represents a root
 269  * storage. Basically, a document file.
 270  */
 271 struct StorageImpl
 272 {
 273   struct StorageBaseImpl base;
 274
 275   /*
 276    * The following data members are specific to the Storage32Impl
 277    * class
 278    */
 279   HANDLE           hFile;      /* Physical support for the Docfile */
 280   LPOLESTR         pwcsName;   /* Full path of the document file */
 281
 282   /*
 283    * File header
 284    */
 285   WORD  bigBlockSizeBits;
 286   WORD  smallBlockSizeBits;
 287   ULONG bigBlockSize;
 288   ULONG smallBlockSize;
 289   ULONG bigBlockDepotCount;
 290   ULONG rootStartBlock;
 291   ULONG smallBlockDepotStart;
 292   ULONG extBigBlockDepotStart;
 293   ULONG extBigBlockDepotCount;
 294   ULONG bigBlockDepotStart[COUNT_BBDEPOTINHEADER];
 295
 296   ULONG blockDepotCached[NUM_BLOCKS_PER_DEPOT_BLOCK];
 297   ULONG indexBlockDepotCached;
 298   ULONG prevFreeBlock;
 299
 300   /*
 301    * Abstraction of the big block chains for the chains of the header.
 302    */
 303   BlockChainStream* rootBlockChain;
 304   BlockChainStream* smallBlockDepotChain;
 305   BlockChainStream* smallBlockRootChain;
 306
 307   /*
 308    * Pointer to the big block file abstraction
 309    */
 310   BigBlockFile* bigBlockFile;
 311 };
 312
 313 HRESULT StorageImpl_ReadRawDirEntry(
 314             StorageImpl *This,
 315             ULONG index,
 316             BYTE *buffer);
 317
 318 void UpdateRawDirEntry(
 319     BYTE *buffer,
 320     const DirEntry *newData);
 321
 322 HRESULT StorageImpl_WriteRawDirEntry(
 323             StorageImpl *This,
 324             ULONG index,
 325             const BYTE *buffer);
 326
 327 BOOL StorageImpl_ReadDirEntry(
 328             StorageImpl*    This,
 329             DirRef          index,
 330             DirEntry*       buffer);
 331
 332 BOOL StorageImpl_WriteDirEntry(
 333             StorageImpl*        This,
 334             DirRef              index,
 335             const DirEntry*     buffer);
 336
 337 BlockChainStream* Storage32Impl_SmallBlocksToBigBlocks(
 338                       StorageImpl* This,
 339                       SmallBlockChainStream** ppsbChain);
 340
 341 SmallBlockChainStream* Storage32Impl_BigBlocksToSmallBlocks(
 342                       StorageImpl* This,
 343                       BlockChainStream** ppbbChain);
 344
 345 /****************************************************************************
 346  * StgStreamImpl definitions.
 347  *
 348  * This class implements the IStream32 interface and represents a stream
 349  * located inside a storage object.
 350  */
 351 struct StgStreamImpl
 352 {
 353   const IStreamVtbl *lpVtbl;  /* Needs to be the first item in the struct
 354                          * since we want to cast this to an IStream pointer */
 355
 356   /*
 357    * We are an entry in the storage object's stream handler list
 358    */
 359
 360   struct list StrmListEntry;
 361
 362   /*
 363    * Reference count
 364    */
 365   LONG               ref;
 366
 367   /*
 368    * Storage that is the parent(owner) of the stream
 369    */
 370   StorageBaseImpl* parentStorage;
 371
 372   /*
 373    * Access mode of this stream.
 374    */
 375   DWORD grfMode;
 376
 377   /*
 378    * Index of the directory entry that owns (points to) this stream.
 379    */
 380   DirRef             dirEntry;
 381
 382   /*
 383    * Helper variable that contains the size of the stream
 384    */
 385   ULARGE_INTEGER     streamSize;
 386
 387   /*
 388    * This is the current position of the cursor in the stream
 389    */
 390   ULARGE_INTEGER     currentPosition;
 391
 392   /*
 393    * The information in the stream is represented by a chain of small blocks
 394    * or a chain of large blocks. Depending on the case, one of the two
 395    * following variables points to that information.
 396    */
 397   BlockChainStream*      bigBlockChain;
 398   SmallBlockChainStream* smallBlockChain;
 399 };
 400
 401 /*
 402  * Method definition for the StgStreamImpl class.
 403  */
 404 StgStreamImpl* StgStreamImpl_Construct(
 405                 StorageBaseImpl* parentStorage,
 406     DWORD            grfMode,
 407     DirRef           dirEntry);
 408
 409
 410 /******************************************************************************
 411  * Endian conversion macros
 412  */
 413 #ifdef WORDS_BIGENDIAN
 414
 415 #define htole32(x) RtlUlongByteSwap(x)
 416 #define htole16(x) RtlUshortByteSwap(x)
 417 #define lendian32toh(x) RtlUlongByteSwap(x)
 418 #define lendian16toh(x) RtlUshortByteSwap(x)
 419
 420 #else
 421
 422 #define htole32(x) (x)
 423 #define htole16(x) (x)
 424 #define lendian32toh(x) (x)
 425 #define lendian16toh(x) (x)
 426
 427 #endif
 428
 429 /******************************************************************************
 430  * The StorageUtl_ functions are miscellaneous utility functions. Most of which
 431  * are abstractions used to read values from file buffers without having to
 432  * worry about bit order
 433  */
 434 void StorageUtl_ReadWord(const BYTE* buffer, ULONG offset, WORD* value);
 435 void StorageUtl_WriteWord(BYTE* buffer, ULONG offset, WORD value);
 436 void StorageUtl_ReadDWord(const BYTE* buffer, ULONG offset, DWORD* value);
 437 void StorageUtl_WriteDWord(BYTE* buffer, ULONG offset, DWORD value);
 438 void StorageUtl_ReadULargeInteger(const BYTE* buffer, ULONG offset,
 439  ULARGE_INTEGER* value);
 440 void StorageUtl_WriteULargeInteger(BYTE* buffer, ULONG offset,
 441  const ULARGE_INTEGER *value);
 442 void StorageUtl_ReadGUID(const BYTE* buffer, ULONG offset, GUID* value);
 443 void StorageUtl_WriteGUID(BYTE* buffer, ULONG offset, const GUID* value);
 444 void StorageUtl_CopyDirEntryToSTATSTG(StorageBaseImpl *storage,STATSTG* destination,
 445  const DirEntry* source, int statFlags);
 446
 447 /****************************************************************************
 448  * BlockChainStream definitions.
 449  *
 450  * The BlockChainStream class is a utility class that is used to create an
 451  * abstraction of the big block chains in the storage file.
 452  */
 453 struct BlockChainStream
 454 {
 455   StorageImpl* parentStorage;
 456   ULONG*       headOfStreamPlaceHolder;
 457   DirRef       ownerDirEntry;
 458   ULONG        lastBlockNoInSequence;
 459   ULONG        lastBlockNoInSequenceIndex;
 460   ULONG        tailIndex;
 461   ULONG        numBlocks;
 462 };
 463
 464 /*
 465  * Methods for the BlockChainStream class.
 466  */
 467 BlockChainStream* BlockChainStream_Construct(
 468                 StorageImpl* parentStorage,
 469                 ULONG*         headOfStreamPlaceHolder,
 470                 DirRef         dirEntry);
 471
 472 void BlockChainStream_Destroy(
 473                 BlockChainStream* This);
 474
 475 HRESULT BlockChainStream_ReadAt(
 476                 BlockChainStream* This,
 477                 ULARGE_INTEGER offset,
 478                 ULONG          size,
 479                 void*          buffer,
 480                 ULONG*         bytesRead);
 481
 482 HRESULT BlockChainStream_WriteAt(
 483                 BlockChainStream* This,
 484                 ULARGE_INTEGER offset,
 485                 ULONG          size,
 486                 const void*    buffer,
 487                 ULONG*         bytesWritten);
 488
 489 BOOL BlockChainStream_SetSize(
 490                 BlockChainStream* This,
 491                 ULARGE_INTEGER    newSize);
 492
 493 /****************************************************************************
 494  * SmallBlockChainStream definitions.
 495  *
 496  * The SmallBlockChainStream class is a utility class that is used to create an
 497  * abstraction of the small block chains in the storage file.
 498  */
 499 struct SmallBlockChainStream
 500 {
 501   StorageImpl* parentStorage;
 502   DirRef         ownerDirEntry;
 503   ULONG*         headOfStreamPlaceHolder;
 504 };
 505
 506 /*
 507  * Methods of the SmallBlockChainStream class.
 508  */
 509 SmallBlockChainStream* SmallBlockChainStream_Construct(
 510            StorageImpl*   parentStorage,
 511            ULONG*         headOfStreamPlaceHolder,
 512            DirRef         dirEntry);
 513
 514 void SmallBlockChainStream_Destroy(
 515                SmallBlockChainStream* This);
 516
 517 HRESULT SmallBlockChainStream_ReadAt(
 518                SmallBlockChainStream* This,
 519                ULARGE_INTEGER offset,
 520                ULONG          size,
 521                void*          buffer,
 522                ULONG*         bytesRead);
 523
 524 HRESULT SmallBlockChainStream_WriteAt(
 525                SmallBlockChainStream* This,
 526                ULARGE_INTEGER offset,
 527                ULONG          size,
 528                const void*    buffer,
 529                ULONG*         bytesWritten);
 530
 531 BOOL SmallBlockChainStream_SetSize(
 532                SmallBlockChainStream* This,
 533                ULARGE_INTEGER          newSize);
 534
 535
 536 #endif /* __STORAGE32_H__ */