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   HRESULT (*CreateDirEntry)(StorageBaseImpl*,const DirEntry*,DirRef*);
 252 };
 253
 254 static inline void StorageBaseImpl_Destroy(StorageBaseImpl *This)
 255 {
 256   This->baseVtbl->Destroy(This);
 257 }
 258
 259 static inline HRESULT StorageBaseImpl_CreateDirEntry(StorageBaseImpl *This,
 260   const DirEntry *newData, DirRef *index)
 261 {
 262   return This->baseVtbl->CreateDirEntry(This, newData, index);
 263 }
 264
 265 /****************************************************************************
 266  * StorageBaseImpl stream list handlers
 267  */
 268
 269 void StorageBaseImpl_AddStream(StorageBaseImpl * stg, StgStreamImpl * strm);
 270 void StorageBaseImpl_RemoveStream(StorageBaseImpl * stg, StgStreamImpl * strm);
 271
 272 /****************************************************************************
 273  * Storage32Impl definitions.
 274  *
 275  * This implementation of the IStorage32 interface represents a root
 276  * storage. Basically, a document file.
 277  */
 278 struct StorageImpl
 279 {
 280   struct StorageBaseImpl base;
 281
 282   /*
 283    * The following data members are specific to the Storage32Impl
 284    * class
 285    */
 286   HANDLE           hFile;      /* Physical support for the Docfile */
 287   LPOLESTR         pwcsName;   /* Full path of the document file */
 288
 289   /*
 290    * File header
 291    */
 292   WORD  bigBlockSizeBits;
 293   WORD  smallBlockSizeBits;
 294   ULONG bigBlockSize;
 295   ULONG smallBlockSize;
 296   ULONG bigBlockDepotCount;
 297   ULONG rootStartBlock;
 298   ULONG smallBlockDepotStart;
 299   ULONG extBigBlockDepotStart;
 300   ULONG extBigBlockDepotCount;
 301   ULONG bigBlockDepotStart[COUNT_BBDEPOTINHEADER];
 302
 303   ULONG blockDepotCached[NUM_BLOCKS_PER_DEPOT_BLOCK];
 304   ULONG indexBlockDepotCached;
 305   ULONG prevFreeBlock;
 306
 307   /*
 308    * Abstraction of the big block chains for the chains of the header.
 309    */
 310   BlockChainStream* rootBlockChain;
 311   BlockChainStream* smallBlockDepotChain;
 312   BlockChainStream* smallBlockRootChain;
 313
 314   /*
 315    * Pointer to the big block file abstraction
 316    */
 317   BigBlockFile* bigBlockFile;
 318 };
 319
 320 HRESULT StorageImpl_ReadRawDirEntry(
 321             StorageImpl *This,
 322             ULONG index,
 323             BYTE *buffer);
 324
 325 void UpdateRawDirEntry(
 326     BYTE *buffer,
 327     const DirEntry *newData);
 328
 329 HRESULT StorageImpl_WriteRawDirEntry(
 330             StorageImpl *This,
 331             ULONG index,
 332             const BYTE *buffer);
 333
 334 HRESULT StorageImpl_ReadDirEntry(
 335             StorageImpl*    This,
 336             DirRef          index,
 337             DirEntry*       buffer);
 338
 339 HRESULT StorageImpl_WriteDirEntry(
 340             StorageImpl*        This,
 341             DirRef              index,
 342             const DirEntry*     buffer);
 343
 344 BlockChainStream* Storage32Impl_SmallBlocksToBigBlocks(
 345                       StorageImpl* This,
 346                       SmallBlockChainStream** ppsbChain);
 347
 348 SmallBlockChainStream* Storage32Impl_BigBlocksToSmallBlocks(
 349                       StorageImpl* This,
 350                       BlockChainStream** ppbbChain);
 351
 352 /****************************************************************************
 353  * StgStreamImpl definitions.
 354  *
 355  * This class implements the IStream32 interface and represents a stream
 356  * located inside a storage object.
 357  */
 358 struct StgStreamImpl
 359 {
 360   const IStreamVtbl *lpVtbl;  /* Needs to be the first item in the struct
 361                          * since we want to cast this to an IStream pointer */
 362
 363   /*
 364    * We are an entry in the storage object's stream handler list
 365    */
 366
 367   struct list StrmListEntry;
 368
 369   /*
 370    * Reference count
 371    */
 372   LONG               ref;
 373
 374   /*
 375    * Storage that is the parent(owner) of the stream
 376    */
 377   StorageBaseImpl* parentStorage;
 378
 379   /*
 380    * Access mode of this stream.
 381    */
 382   DWORD grfMode;
 383
 384   /*
 385    * Index of the directory entry that owns (points to) this stream.
 386    */
 387   DirRef             dirEntry;
 388
 389   /*
 390    * Helper variable that contains the size of the stream
 391    */
 392   ULARGE_INTEGER     streamSize;
 393
 394   /*
 395    * This is the current position of the cursor in the stream
 396    */
 397   ULARGE_INTEGER     currentPosition;
 398
 399   /*
 400    * The information in the stream is represented by a chain of small blocks
 401    * or a chain of large blocks. Depending on the case, one of the two
 402    * following variables points to that information.
 403    */
 404   BlockChainStream*      bigBlockChain;
 405   SmallBlockChainStream* smallBlockChain;
 406 };
 407
 408 /*
 409  * Method definition for the StgStreamImpl class.
 410  */
 411 StgStreamImpl* StgStreamImpl_Construct(
 412                 StorageBaseImpl* parentStorage,
 413     DWORD            grfMode,
 414     DirRef           dirEntry);
 415
 416
 417 /******************************************************************************
 418  * Endian conversion macros
 419  */
 420 #ifdef WORDS_BIGENDIAN
 421
 422 #define htole32(x) RtlUlongByteSwap(x)
 423 #define htole16(x) RtlUshortByteSwap(x)
 424 #define lendian32toh(x) RtlUlongByteSwap(x)
 425 #define lendian16toh(x) RtlUshortByteSwap(x)
 426
 427 #else
 428
 429 #define htole32(x) (x)
 430 #define htole16(x) (x)
 431 #define lendian32toh(x) (x)
 432 #define lendian16toh(x) (x)
 433
 434 #endif
 435
 436 /******************************************************************************
 437  * The StorageUtl_ functions are miscellaneous utility functions. Most of which
 438  * are abstractions used to read values from file buffers without having to
 439  * worry about bit order
 440  */
 441 void StorageUtl_ReadWord(const BYTE* buffer, ULONG offset, WORD* value);
 442 void StorageUtl_WriteWord(BYTE* buffer, ULONG offset, WORD value);
 443 void StorageUtl_ReadDWord(const BYTE* buffer, ULONG offset, DWORD* value);
 444 void StorageUtl_WriteDWord(BYTE* buffer, ULONG offset, DWORD value);
 445 void StorageUtl_ReadULargeInteger(const BYTE* buffer, ULONG offset,
 446  ULARGE_INTEGER* value);
 447 void StorageUtl_WriteULargeInteger(BYTE* buffer, ULONG offset,
 448  const ULARGE_INTEGER *value);
 449 void StorageUtl_ReadGUID(const BYTE* buffer, ULONG offset, GUID* value);
 450 void StorageUtl_WriteGUID(BYTE* buffer, ULONG offset, const GUID* value);
 451 void StorageUtl_CopyDirEntryToSTATSTG(StorageBaseImpl *storage,STATSTG* destination,
 452  const DirEntry* source, int statFlags);
 453
 454 /****************************************************************************
 455  * BlockChainStream definitions.
 456  *
 457  * The BlockChainStream class is a utility class that is used to create an
 458  * abstraction of the big block chains in the storage file.
 459  */
 460 struct BlockChainStream
 461 {
 462   StorageImpl* parentStorage;
 463   ULONG*       headOfStreamPlaceHolder;
 464   DirRef       ownerDirEntry;
 465   ULONG        lastBlockNoInSequence;
 466   ULONG        lastBlockNoInSequenceIndex;
 467   ULONG        tailIndex;
 468   ULONG        numBlocks;
 469 };
 470
 471 /*
 472  * Methods for the BlockChainStream class.
 473  */
 474 BlockChainStream* BlockChainStream_Construct(
 475                 StorageImpl* parentStorage,
 476                 ULONG*         headOfStreamPlaceHolder,
 477                 DirRef         dirEntry);
 478
 479 void BlockChainStream_Destroy(
 480                 BlockChainStream* This);
 481
 482 HRESULT BlockChainStream_ReadAt(
 483                 BlockChainStream* This,
 484                 ULARGE_INTEGER offset,
 485                 ULONG          size,
 486                 void*          buffer,
 487                 ULONG*         bytesRead);
 488
 489 HRESULT BlockChainStream_WriteAt(
 490                 BlockChainStream* This,
 491                 ULARGE_INTEGER offset,
 492                 ULONG          size,
 493                 const void*    buffer,
 494                 ULONG*         bytesWritten);
 495
 496 BOOL BlockChainStream_SetSize(
 497                 BlockChainStream* This,
 498                 ULARGE_INTEGER    newSize);
 499
 500 /****************************************************************************
 501  * SmallBlockChainStream definitions.
 502  *
 503  * The SmallBlockChainStream class is a utility class that is used to create an
 504  * abstraction of the small block chains in the storage file.
 505  */
 506 struct SmallBlockChainStream
 507 {
 508   StorageImpl* parentStorage;
 509   DirRef         ownerDirEntry;
 510   ULONG*         headOfStreamPlaceHolder;
 511 };
 512
 513 /*
 514  * Methods of the SmallBlockChainStream class.
 515  */
 516 SmallBlockChainStream* SmallBlockChainStream_Construct(
 517            StorageImpl*   parentStorage,
 518            ULONG*         headOfStreamPlaceHolder,
 519            DirRef         dirEntry);
 520
 521 void SmallBlockChainStream_Destroy(
 522                SmallBlockChainStream* This);
 523
 524 HRESULT SmallBlockChainStream_ReadAt(
 525                SmallBlockChainStream* This,
 526                ULARGE_INTEGER offset,
 527                ULONG          size,
 528                void*          buffer,
 529                ULONG*         bytesRead);
 530
 531 HRESULT SmallBlockChainStream_WriteAt(
 532                SmallBlockChainStream* This,
 533                ULARGE_INTEGER offset,
 534                ULONG          size,
 535                const void*    buffer,
 536                ULONG*         bytesWritten);
 537
 538 BOOL SmallBlockChainStream_SetSize(
 539                SmallBlockChainStream* This,
 540                ULARGE_INTEGER          newSize);
 541
 542
 543 #endif /* __STORAGE32_H__ */