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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_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 /*
 156  * Declaration of the data structures
 157  */
 158 typedef struct BigBlockFile BigBlockFile,*LPBIGBLOCKFILE;
 159 typedef struct MappedPage   MappedPage,*LPMAPPEDPAGE;
 160
 161 struct BigBlockFile
 162 {
 163   BOOL fileBased;
 164   ULARGE_INTEGER filesize;
 165   ULONG blocksize;
 166   HANDLE hfile;
 167   HANDLE hfilemap;
 168   DWORD flProtect;
 169   MappedPage *maplist;
 170   MappedPage *victimhead, *victimtail;
 171   ULONG num_victim_pages;
 172   ILockBytes *pLkbyt;
 173   HGLOBAL hbytearray;
 174   LPVOID pbytearray;
 175 };
 176
 177 /*
 178  * Declaration of the functions used to manipulate the BigBlockFile
 179  * data structure.
 180  */
 181 BigBlockFile*  BIGBLOCKFILE_Construct(HANDLE hFile,
 182                                       ILockBytes* pLkByt,
 183                                       DWORD openFlags,
 184                                       ULONG blocksize,
 185                                       BOOL fileBased);
 186 void           BIGBLOCKFILE_Destructor(LPBIGBLOCKFILE This);
 187 void           BIGBLOCKFILE_EnsureExists(LPBIGBLOCKFILE This, ULONG index);
 188 void           BIGBLOCKFILE_SetSize(LPBIGBLOCKFILE This, ULARGE_INTEGER newSize);
 189 HRESULT        BIGBLOCKFILE_ReadAt(LPBIGBLOCKFILE This, ULARGE_INTEGER offset,
 190            void* buffer, ULONG size, ULONG* bytesRead);
 191 HRESULT        BIGBLOCKFILE_WriteAt(LPBIGBLOCKFILE This, ULARGE_INTEGER offset,
 192            const void* buffer, ULONG size, ULONG* bytesRead);
 193
 194 /*************************************************************************
 195  * Ole Convert support
 196  */
 197
 198 void OLECONVERT_CreateOleStream(LPSTORAGE pStorage);
 199 HRESULT OLECONVERT_CreateCompObjStream(LPSTORAGE pStorage, LPCSTR strOleTypeName);
 200
 201 /****************************************************************************
 202  * Storage32BaseImpl definitions.
 203  *
 204  * This structure defines the base information contained in all implementations
 205  * of IStorage32 contained in this file storage implementation.
 206  *
 207  * In OOP terms, this is the base class for all the IStorage32 implementations
 208  * contained in this file.
 209  */
 210 struct StorageBaseImpl
 211 {
 212   const IStorageVtbl *lpVtbl;    /* Needs to be the first item in the struct
 213                             * since we want to cast this in a Storage32 pointer */
 214
 215   const IPropertySetStorageVtbl *pssVtbl; /* interface for adding a properties stream */
 216
 217   /*
 218    * Stream tracking list
 219    */
 220
 221   struct list strmHead;
 222
 223   /*
 224    * Reference count of this object
 225    */
 226   LONG ref;
 227
 228   /*
 229    * Ancestor storage (top level)
 230    */
 231   StorageImpl* ancestorStorage;
 232
 233   /*
 234    * Index of the property for the root of
 235    * this storage
 236    */
 237   ULONG rootPropertySetIndex;
 238
 239   /*
 240    * virtual Destructor method.
 241    */
 242   void (*v_destructor)(StorageBaseImpl*);
 243
 244   /*
 245    * flags that this storage was opened or created with
 246    */
 247   DWORD openFlags;
 248
 249   /*
 250    * State bits appear to only be preserved while running. No in the stream
 251    */
 252   DWORD stateBits;
 253 };
 254
 255 /****************************************************************************
 256  * StorageBaseImpl stream list handlers
 257  */
 258
 259 void StorageBaseImpl_AddStream(StorageBaseImpl * stg, StgStreamImpl * strm);
 260 void StorageBaseImpl_RemoveStream(StorageBaseImpl * stg, StgStreamImpl * strm);
 261
 262 /****************************************************************************
 263  * Storage32Impl definitions.
 264  *
 265  * This implementation of the IStorage32 interface represents a root
 266  * storage. Basically, a document file.
 267  */
 268 struct StorageImpl
 269 {
 270   struct StorageBaseImpl base;
 271
 272   /*
 273    * The following data members are specific to the Storage32Impl
 274    * class
 275    */
 276   HANDLE           hFile;      /* Physical support for the Docfile */
 277   LPOLESTR         pwcsName;   /* Full path of the document file */
 278
 279   /* FIXME: should this be in Storage32BaseImpl ? */
 280   WCHAR            filename[PROPERTY_NAME_BUFFER_LEN];
 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 BOOL StorageImpl_ReadProperty(
 314             StorageImpl*    This,
 315             ULONG           index,
 316             StgProperty*    buffer);
 317
 318 BOOL StorageImpl_WriteProperty(
 319             StorageImpl*        This,
 320             ULONG               index,
 321             const StgProperty*  buffer);
 322
 323 BlockChainStream* Storage32Impl_SmallBlocksToBigBlocks(
 324                       StorageImpl* This,
 325                       SmallBlockChainStream** ppsbChain);
 326
 327 /****************************************************************************
 328  * StgStreamImpl definitions.
 329  *
 330  * This class implements the IStream32 interface and represents a stream
 331  * located inside a storage object.
 332  */
 333 struct StgStreamImpl
 334 {
 335   const IStreamVtbl *lpVtbl;  /* Needs to be the first item in the struct
 336                          * since we want to cast this to an IStream pointer */
 337
 338   /*
 339    * We are an entry in the storage object's stream handler list
 340    */
 341
 342   struct list StrmListEntry;
 343
 344   /*
 345    * Reference count
 346    */
 347   LONG               ref;
 348
 349   /*
 350    * Storage that is the parent(owner) of the stream
 351    */
 352   StorageBaseImpl* parentStorage;
 353
 354   /*
 355    * Access mode of this stream.
 356    */
 357   DWORD grfMode;
 358
 359   /*
 360    * Index of the property that owns (points to) this stream.
 361    */
 362   ULONG              ownerProperty;
 363
 364   /*
 365    * Helper variable that contains the size of the stream
 366    */
 367   ULARGE_INTEGER     streamSize;
 368
 369   /*
 370    * This is the current position of the cursor in the stream
 371    */
 372   ULARGE_INTEGER     currentPosition;
 373
 374   /*
 375    * The information in the stream is represented by a chain of small blocks
 376    * or a chain of large blocks. Depending on the case, one of the two
 377    * following variables points to that information.
 378    */
 379   BlockChainStream*      bigBlockChain;
 380   SmallBlockChainStream* smallBlockChain;
 381 };
 382
 383 /*
 384  * Method definition for the StgStreamImpl class.
 385  */
 386 StgStreamImpl* StgStreamImpl_Construct(
 387                 StorageBaseImpl* parentStorage,
 388     DWORD            grfMode,
 389     ULONG            ownerProperty);
 390
 391
 392 /******************************************************************************
 393  * Endian conversion macros
 394  */
 395 #ifdef WORDS_BIGENDIAN
 396
 397 #define htole32(x) RtlUlongByteSwap(x)
 398 #define htole16(x) RtlUshortByteSwap(x)
 399 #define le32toh(x) RtlUlongByteSwap(x)
 400 #define le16toh(x) RtlUshortByteSwap(x)
 401
 402 #else
 403
 404 #define htole32(x) (x)
 405 #define htole16(x) (x)
 406 #define le32toh(x) (x)
 407 #define le16toh(x) (x)
 408
 409 #endif
 410
 411 /******************************************************************************
 412  * The StorageUtl_ functions are miscellaneous utility functions. Most of which
 413  * are abstractions used to read values from file buffers without having to
 414  * worry about bit order
 415  */
 416 void StorageUtl_ReadWord(const BYTE* buffer, ULONG offset, WORD* value);
 417 void StorageUtl_WriteWord(BYTE* buffer, ULONG offset, WORD value);
 418 void StorageUtl_ReadDWord(const BYTE* buffer, ULONG offset, DWORD* value);
 419 void StorageUtl_WriteDWord(BYTE* buffer, ULONG offset, DWORD value);
 420 void StorageUtl_ReadULargeInteger(const BYTE* buffer, ULONG offset,
 421  ULARGE_INTEGER* value);
 422 void StorageUtl_WriteULargeInteger(BYTE* buffer, ULONG offset,
 423  const ULARGE_INTEGER *value);
 424 void StorageUtl_ReadGUID(const BYTE* buffer, ULONG offset, GUID* value);
 425 void StorageUtl_WriteGUID(BYTE* buffer, ULONG offset, const GUID* value);
 426 void StorageUtl_CopyPropertyToSTATSTG(STATSTG* destination, const StgProperty* source,
 427  int statFlags);
 428
 429 /****************************************************************************
 430  * BlockChainStream definitions.
 431  *
 432  * The BlockChainStream class is a utility class that is used to create an
 433  * abstraction of the big block chains in the storage file.
 434  */
 435 struct BlockChainStream
 436 {
 437   StorageImpl* parentStorage;
 438   ULONG*       headOfStreamPlaceHolder;
 439   ULONG        ownerPropertyIndex;
 440   ULONG        lastBlockNoInSequence;
 441   ULONG        lastBlockNoInSequenceIndex;
 442   ULONG        tailIndex;
 443   ULONG        numBlocks;
 444 };
 445
 446 /*
 447  * Methods for the BlockChainStream class.
 448  */
 449 BlockChainStream* BlockChainStream_Construct(
 450                 StorageImpl* parentStorage,
 451                 ULONG*         headOfStreamPlaceHolder,
 452                 ULONG          propertyIndex);
 453
 454 void BlockChainStream_Destroy(
 455                 BlockChainStream* This);
 456
 457 HRESULT BlockChainStream_ReadAt(
 458                 BlockChainStream* This,
 459                 ULARGE_INTEGER offset,
 460                 ULONG          size,
 461                 void*          buffer,
 462                 ULONG*         bytesRead);
 463
 464 HRESULT BlockChainStream_WriteAt(
 465                 BlockChainStream* This,
 466                 ULARGE_INTEGER offset,
 467                 ULONG          size,
 468                 const void*    buffer,
 469                 ULONG*         bytesWritten);
 470
 471 BOOL BlockChainStream_SetSize(
 472                 BlockChainStream* This,
 473                 ULARGE_INTEGER    newSize);
 474
 475 /****************************************************************************
 476  * SmallBlockChainStream definitions.
 477  *
 478  * The SmallBlockChainStream class is a utility class that is used to create an
 479  * abstraction of the small block chains in the storage file.
 480  */
 481 struct SmallBlockChainStream
 482 {
 483   StorageImpl* parentStorage;
 484   ULONG          ownerPropertyIndex;
 485 };
 486
 487 /*
 488  * Methods of the SmallBlockChainStream class.
 489  */
 490 SmallBlockChainStream* SmallBlockChainStream_Construct(
 491                StorageImpl* parentStorage,
 492                ULONG          propertyIndex);
 493
 494 void SmallBlockChainStream_Destroy(
 495                SmallBlockChainStream* This);
 496
 497 HRESULT SmallBlockChainStream_ReadAt(
 498                SmallBlockChainStream* This,
 499                ULARGE_INTEGER offset,
 500                ULONG          size,
 501                void*          buffer,
 502                ULONG*         bytesRead);
 503
 504 HRESULT SmallBlockChainStream_WriteAt(
 505                SmallBlockChainStream* This,
 506                ULARGE_INTEGER offset,
 507                ULONG          size,
 508                const void*    buffer,
 509                ULONG*         bytesWritten);
 510
 511 BOOL SmallBlockChainStream_SetSize(
 512                SmallBlockChainStream* This,
 513                ULARGE_INTEGER          newSize);
 514
 515
 516 #endif /* __STORAGE32_H__ */