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_PROPERTYTYPE    = 0x00000042;
  57 static const ULONG OFFSET_PS_PREVIOUSPROP    = 0x00000044;
  58 static const ULONG OFFSET_PS_NEXTPROP        = 0x00000048;
  59 static const ULONG OFFSET_PS_DIRPROP         = 0x0000004C;
  60 static const ULONG OFFSET_PS_GUID            = 0x00000050;
  61 static const ULONG OFFSET_PS_TSS1            = 0x00000064;
  62 static const ULONG OFFSET_PS_TSD1            = 0x00000068;
  63 static const ULONG OFFSET_PS_TSS2            = 0x0000006C;
  64 static const ULONG OFFSET_PS_TSD2            = 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 PROPERTY_NULL             = 0xFFFFFFFF;
  76
  77 #define PROPERTY_NAME_MAX_LEN    0x20
  78 #define PROPERTY_NAME_BUFFER_LEN 0x40
  79
  80 #define PROPSET_BLOCK_SIZE 0x00000080
  81
  82 /*
  83  * Property type of relation
  84  */
  85 #define PROPERTY_RELATION_PREVIOUS 0
  86 #define PROPERTY_RELATION_NEXT     1
  87 #define PROPERTY_RELATION_DIR      2
  88
  89 /*
  90  * Property type constants
  91  */
  92 #define PROPTYPE_STORAGE 0x01
  93 #define PROPTYPE_STREAM  0x02
  94 #define PROPTYPE_ROOT    0x05
  95
  96 /*
  97  * These defines assume a hardcoded blocksize. The code will assert
  98  * if the blocksize is different. Some changes will have to be done if it
  99  * becomes the case.
 100  */
 101 #define BIG_BLOCK_SIZE           0x200
 102 #define COUNT_BBDEPOTINHEADER    109
 103 #define LIMIT_TO_USE_SMALL_BLOCK 0x1000
 104 #define NUM_BLOCKS_PER_DEPOT_BLOCK 128
 105
 106 #define STGM_ACCESS_MODE(stgm)   ((stgm)&0x0000f)
 107 #define STGM_SHARE_MODE(stgm)    ((stgm)&0x000f0)
 108 #define STGM_CREATE_MODE(stgm)   ((stgm)&0x0f000)
 109
 110 #define STGM_KNOWN_FLAGS (0xf0ff | \
 111      STGM_TRANSACTED | STGM_CONVERT | STGM_PRIORITY | STGM_NOSCRATCH | \
 112      STGM_NOSNAPSHOT | STGM_DIRECT_SWMR | STGM_DELETEONRELEASE | STGM_SIMPLE)
 113
 114 /*
 115  * Forward declarations of all the structures used by the storage
 116  * module.
 117  */
 118 typedef struct StorageBaseImpl     StorageBaseImpl;
 119 typedef struct StorageImpl         StorageImpl;
 120 typedef struct BlockChainStream      BlockChainStream;
 121 typedef struct SmallBlockChainStream SmallBlockChainStream;
 122 typedef struct IEnumSTATSTGImpl      IEnumSTATSTGImpl;
 123 typedef struct StgProperty           StgProperty;
 124 typedef struct StgStreamImpl         StgStreamImpl;
 125
 126 /*
 127  * This utility structure is used to read/write the information in a storage
 128  * property.
 129  */
 130 struct StgProperty
 131 {
 132   WCHAR          name[PROPERTY_NAME_MAX_LEN];
 133   WORD           sizeOfNameString;
 134   BYTE           propertyType;
 135   ULONG          previousProperty;
 136   ULONG          nextProperty;
 137   ULONG          dirProperty;
 138   GUID           propertyUniqueID;
 139   ULONG          timeStampS1;
 140   ULONG          timeStampD1;
 141   ULONG          timeStampS2;
 142   ULONG          timeStampD2;
 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                                       ULONG blocksize,
 165                                       BOOL fileBased);
 166 void           BIGBLOCKFILE_Destructor(LPBIGBLOCKFILE This);
 167 HRESULT        BIGBLOCKFILE_EnsureExists(LPBIGBLOCKFILE This, ULONG index);
 168 HRESULT        BIGBLOCKFILE_SetSize(LPBIGBLOCKFILE This, ULARGE_INTEGER newSize);
 169 HRESULT        BIGBLOCKFILE_ReadAt(LPBIGBLOCKFILE This, ULARGE_INTEGER offset,
 170            void* buffer, ULONG size, ULONG* bytesRead);
 171 HRESULT        BIGBLOCKFILE_WriteAt(LPBIGBLOCKFILE This, ULARGE_INTEGER offset,
 172            const void* buffer, ULONG size, ULONG* bytesRead);
 173
 174 /*************************************************************************
 175  * Ole Convert support
 176  */
 177
 178 void OLECONVERT_CreateOleStream(LPSTORAGE pStorage);
 179 HRESULT OLECONVERT_CreateCompObjStream(LPSTORAGE pStorage, LPCSTR strOleTypeName);
 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    * Reference count of this object
 205    */
 206   LONG ref;
 207
 208   /*
 209    * Ancestor storage (top level)
 210    */
 211   StorageImpl* ancestorStorage;
 212
 213   /*
 214    * Index of the property for the root of
 215    * this storage
 216    */
 217   ULONG rootPropertySetIndex;
 218
 219   /*
 220    * virtual Destructor method.
 221    */
 222   void (*v_destructor)(StorageBaseImpl*);
 223
 224   /*
 225    * flags that this storage was opened or created with
 226    */
 227   DWORD openFlags;
 228
 229   /*
 230    * State bits appear to only be preserved while running. No in the stream
 231    */
 232   DWORD stateBits;
 233 };
 234
 235 /****************************************************************************
 236  * StorageBaseImpl stream list handlers
 237  */
 238
 239 void StorageBaseImpl_AddStream(StorageBaseImpl * stg, StgStreamImpl * strm);
 240 void StorageBaseImpl_RemoveStream(StorageBaseImpl * stg, StgStreamImpl * strm);
 241
 242 /****************************************************************************
 243  * Storage32Impl definitions.
 244  *
 245  * This implementation of the IStorage32 interface represents a root
 246  * storage. Basically, a document file.
 247  */
 248 struct StorageImpl
 249 {
 250   struct StorageBaseImpl base;
 251
 252   /*
 253    * The following data members are specific to the Storage32Impl
 254    * class
 255    */
 256   HANDLE           hFile;      /* Physical support for the Docfile */
 257   LPOLESTR         pwcsName;   /* Full path of the document file */
 258   BOOL             create;     /* Was the storage created or opened.
 259                                   The behaviour of STGM_SIMPLE depends on this */
 260
 261   /* FIXME: should this be in Storage32BaseImpl ? */
 262   WCHAR            filename[PROPERTY_NAME_BUFFER_LEN];
 263
 264   /*
 265    * File header
 266    */
 267   WORD  bigBlockSizeBits;
 268   WORD  smallBlockSizeBits;
 269   ULONG bigBlockSize;
 270   ULONG smallBlockSize;
 271   ULONG bigBlockDepotCount;
 272   ULONG rootStartBlock;
 273   ULONG smallBlockDepotStart;
 274   ULONG extBigBlockDepotStart;
 275   ULONG extBigBlockDepotCount;
 276   ULONG bigBlockDepotStart[COUNT_BBDEPOTINHEADER];
 277
 278   ULONG blockDepotCached[NUM_BLOCKS_PER_DEPOT_BLOCK];
 279   ULONG indexBlockDepotCached;
 280   ULONG prevFreeBlock;
 281
 282   /*
 283    * Abstraction of the big block chains for the chains of the header.
 284    */
 285   BlockChainStream* rootBlockChain;
 286   BlockChainStream* smallBlockDepotChain;
 287   BlockChainStream* smallBlockRootChain;
 288
 289   /*
 290    * Pointer to the big block file abstraction
 291    */
 292   BigBlockFile* bigBlockFile;
 293 };
 294
 295 BOOL StorageImpl_ReadProperty(
 296             StorageImpl*    This,
 297             ULONG           index,
 298             StgProperty*    buffer);
 299
 300 BOOL StorageImpl_WriteProperty(
 301             StorageImpl*        This,
 302             ULONG               index,
 303             const StgProperty*  buffer);
 304
 305 BlockChainStream* Storage32Impl_SmallBlocksToBigBlocks(
 306                       StorageImpl* This,
 307                       SmallBlockChainStream** ppsbChain);
 308
 309 /****************************************************************************
 310  * StgStreamImpl definitions.
 311  *
 312  * This class implements the IStream32 interface and represents a stream
 313  * located inside a storage object.
 314  */
 315 struct StgStreamImpl
 316 {
 317   const IStreamVtbl *lpVtbl;  /* Needs to be the first item in the struct
 318                          * since we want to cast this to an IStream pointer */
 319
 320   /*
 321    * We are an entry in the storage object's stream handler list
 322    */
 323
 324   struct list StrmListEntry;
 325
 326   /*
 327    * Reference count
 328    */
 329   LONG               ref;
 330
 331   /*
 332    * Storage that is the parent(owner) of the stream
 333    */
 334   StorageBaseImpl* parentStorage;
 335
 336   /*
 337    * Access mode of this stream.
 338    */
 339   DWORD grfMode;
 340
 341   /*
 342    * Index of the property that owns (points to) this stream.
 343    */
 344   ULONG              ownerProperty;
 345
 346   /*
 347    * Helper variable that contains the size of the stream
 348    */
 349   ULARGE_INTEGER     streamSize;
 350
 351   /*
 352    * This is the current position of the cursor in the stream
 353    */
 354   ULARGE_INTEGER     currentPosition;
 355
 356   /*
 357    * The information in the stream is represented by a chain of small blocks
 358    * or a chain of large blocks. Depending on the case, one of the two
 359    * following variables points to that information.
 360    */
 361   BlockChainStream*      bigBlockChain;
 362   SmallBlockChainStream* smallBlockChain;
 363 };
 364
 365 /*
 366  * Method definition for the StgStreamImpl class.
 367  */
 368 StgStreamImpl* StgStreamImpl_Construct(
 369                 StorageBaseImpl* parentStorage,
 370     DWORD            grfMode,
 371     ULONG            ownerProperty);
 372
 373
 374 /******************************************************************************
 375  * Endian conversion macros
 376  */
 377 #ifdef WORDS_BIGENDIAN
 378
 379 #define htole32(x) RtlUlongByteSwap(x)
 380 #define htole16(x) RtlUshortByteSwap(x)
 381 #define lendian32toh(x) RtlUlongByteSwap(x)
 382 #define lendian16toh(x) RtlUshortByteSwap(x)
 383
 384 #else
 385
 386 #define htole32(x) (x)
 387 #define htole16(x) (x)
 388 #define lendian32toh(x) (x)
 389 #define lendian16toh(x) (x)
 390
 391 #endif
 392
 393 /******************************************************************************
 394  * The StorageUtl_ functions are miscellaneous utility functions. Most of which
 395  * are abstractions used to read values from file buffers without having to
 396  * worry about bit order
 397  */
 398 void StorageUtl_ReadWord(const BYTE* buffer, ULONG offset, WORD* value);
 399 void StorageUtl_WriteWord(BYTE* buffer, ULONG offset, WORD value);
 400 void StorageUtl_ReadDWord(const BYTE* buffer, ULONG offset, DWORD* value);
 401 void StorageUtl_WriteDWord(BYTE* buffer, ULONG offset, DWORD value);
 402 void StorageUtl_ReadULargeInteger(const BYTE* buffer, ULONG offset,
 403  ULARGE_INTEGER* value);
 404 void StorageUtl_WriteULargeInteger(BYTE* buffer, ULONG offset,
 405  const ULARGE_INTEGER *value);
 406 void StorageUtl_ReadGUID(const BYTE* buffer, ULONG offset, GUID* value);
 407 void StorageUtl_WriteGUID(BYTE* buffer, ULONG offset, const GUID* value);
 408 void StorageUtl_CopyPropertyToSTATSTG(STATSTG* destination, const StgProperty* source,
 409  int statFlags);
 410
 411 /****************************************************************************
 412  * BlockChainStream definitions.
 413  *
 414  * The BlockChainStream class is a utility class that is used to create an
 415  * abstraction of the big block chains in the storage file.
 416  */
 417 struct BlockChainStream
 418 {
 419   StorageImpl* parentStorage;
 420   ULONG*       headOfStreamPlaceHolder;
 421   ULONG        ownerPropertyIndex;
 422   ULONG        lastBlockNoInSequence;
 423   ULONG        lastBlockNoInSequenceIndex;
 424   ULONG        tailIndex;
 425   ULONG        numBlocks;
 426 };
 427
 428 /*
 429  * Methods for the BlockChainStream class.
 430  */
 431 BlockChainStream* BlockChainStream_Construct(
 432                 StorageImpl* parentStorage,
 433                 ULONG*         headOfStreamPlaceHolder,
 434                 ULONG          propertyIndex);
 435
 436 void BlockChainStream_Destroy(
 437                 BlockChainStream* This);
 438
 439 HRESULT BlockChainStream_ReadAt(
 440                 BlockChainStream* This,
 441                 ULARGE_INTEGER offset,
 442                 ULONG          size,
 443                 void*          buffer,
 444                 ULONG*         bytesRead);
 445
 446 HRESULT BlockChainStream_WriteAt(
 447                 BlockChainStream* This,
 448                 ULARGE_INTEGER offset,
 449                 ULONG          size,
 450                 const void*    buffer,
 451                 ULONG*         bytesWritten);
 452
 453 BOOL BlockChainStream_SetSize(
 454                 BlockChainStream* This,
 455                 ULARGE_INTEGER    newSize);
 456
 457 /****************************************************************************
 458  * SmallBlockChainStream definitions.
 459  *
 460  * The SmallBlockChainStream class is a utility class that is used to create an
 461  * abstraction of the small block chains in the storage file.
 462  */
 463 struct SmallBlockChainStream
 464 {
 465   StorageImpl* parentStorage;
 466   ULONG          ownerPropertyIndex;
 467 };
 468
 469 /*
 470  * Methods of the SmallBlockChainStream class.
 471  */
 472 SmallBlockChainStream* SmallBlockChainStream_Construct(
 473                StorageImpl* parentStorage,
 474                ULONG          propertyIndex);
 475
 476 void SmallBlockChainStream_Destroy(
 477                SmallBlockChainStream* This);
 478
 479 HRESULT SmallBlockChainStream_ReadAt(
 480                SmallBlockChainStream* This,
 481                ULARGE_INTEGER offset,
 482                ULONG          size,
 483                void*          buffer,
 484                ULONG*         bytesRead);
 485
 486 HRESULT SmallBlockChainStream_WriteAt(
 487                SmallBlockChainStream* This,
 488                ULARGE_INTEGER offset,
 489                ULONG          size,
 490                const void*    buffer,
 491                ULONG*         bytesWritten);
 492
 493 BOOL SmallBlockChainStream_SetSize(
 494                SmallBlockChainStream* This,
 495                ULARGE_INTEGER          newSize);
 496
 497
 498 #endif /* __STORAGE32_H__ */