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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_RIGHTCHILD      = 0x00000044;
  58 static const ULONG OFFSET_PS_LEFTCHILD       = 0x00000048;
  59 static const ULONG OFFSET_PS_DIRPROP         = 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 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          leftChild;
 136   ULONG          rightChild;
 137   ULONG          dirProperty;
 138   GUID           propertyUniqueID;
 139   FILETIME       ctime;
 140   FILETIME       mtime;
 141   ULONG          startingBlock;
 142   ULARGE_INTEGER size;
 143 };
 144
 145 /*************************************************************************
 146  * Big Block File support
 147  *
 148  * The big block file is an abstraction of a flat file separated in
 149  * same sized blocks. The implementation for the methods described in
 150  * this section appear in stg_bigblockfile.c
 151  */
 152
 153 typedef struct BigBlockFile BigBlockFile,*LPBIGBLOCKFILE;
 154
 155 /*
 156  * Declaration of the functions used to manipulate the BigBlockFile
 157  * data structure.
 158  */
 159 BigBlockFile*  BIGBLOCKFILE_Construct(HANDLE hFile,
 160                                       ILockBytes* pLkByt,
 161                                       DWORD openFlags,
 162                                       ULONG blocksize,
 163                                       BOOL fileBased);
 164 void           BIGBLOCKFILE_Destructor(LPBIGBLOCKFILE This);
 165 HRESULT        BIGBLOCKFILE_EnsureExists(LPBIGBLOCKFILE This, ULONG index);
 166 HRESULT        BIGBLOCKFILE_SetSize(LPBIGBLOCKFILE This, ULARGE_INTEGER newSize);
 167 HRESULT        BIGBLOCKFILE_ReadAt(LPBIGBLOCKFILE This, ULARGE_INTEGER offset,
 168            void* buffer, ULONG size, ULONG* bytesRead);
 169 HRESULT        BIGBLOCKFILE_WriteAt(LPBIGBLOCKFILE This, ULARGE_INTEGER offset,
 170            const void* buffer, ULONG size, ULONG* bytesRead);
 171
 172 /*************************************************************************
 173  * Ole Convert support
 174  */
 175
 176 void OLECONVERT_CreateOleStream(LPSTORAGE pStorage);
 177 HRESULT OLECONVERT_CreateCompObjStream(LPSTORAGE pStorage, LPCSTR strOleTypeName);
 178
 179 /****************************************************************************
 180  * Storage32BaseImpl definitions.
 181  *
 182  * This structure defines the base information contained in all implementations
 183  * of IStorage32 contained in this file storage implementation.
 184  *
 185  * In OOP terms, this is the base class for all the IStorage32 implementations
 186  * contained in this file.
 187  */
 188 struct StorageBaseImpl
 189 {
 190   const IStorageVtbl *lpVtbl;    /* Needs to be the first item in the struct
 191                             * since we want to cast this in a Storage32 pointer */
 192
 193   const IPropertySetStorageVtbl *pssVtbl; /* interface for adding a properties stream */
 194
 195   /*
 196    * Stream tracking list
 197    */
 198
 199   struct list strmHead;
 200
 201   /*
 202    * Reference count of this object
 203    */
 204   LONG ref;
 205
 206   /*
 207    * Ancestor storage (top level)
 208    */
 209   StorageImpl* ancestorStorage;
 210
 211   /*
 212    * Index of the property for the root of
 213    * this storage
 214    */
 215   ULONG rootPropertySetIndex;
 216
 217   /*
 218    * virtual Destructor method.
 219    */
 220   void (*v_destructor)(StorageBaseImpl*);
 221
 222   /*
 223    * flags that this storage was opened or created with
 224    */
 225   DWORD openFlags;
 226
 227   /*
 228    * State bits appear to only be preserved while running. No in the stream
 229    */
 230   DWORD stateBits;
 231 };
 232
 233 /****************************************************************************
 234  * StorageBaseImpl stream list handlers
 235  */
 236
 237 void StorageBaseImpl_AddStream(StorageBaseImpl * stg, StgStreamImpl * strm);
 238 void StorageBaseImpl_RemoveStream(StorageBaseImpl * stg, StgStreamImpl * strm);
 239
 240 /****************************************************************************
 241  * Storage32Impl definitions.
 242  *
 243  * This implementation of the IStorage32 interface represents a root
 244  * storage. Basically, a document file.
 245  */
 246 struct StorageImpl
 247 {
 248   struct StorageBaseImpl base;
 249
 250   /*
 251    * The following data members are specific to the Storage32Impl
 252    * class
 253    */
 254   HANDLE           hFile;      /* Physical support for the Docfile */
 255   LPOLESTR         pwcsName;   /* Full path of the document file */
 256   BOOL             create;     /* Was the storage created or opened.
 257                                   The behaviour of STGM_SIMPLE depends on this */
 258
 259   /* FIXME: should this be in Storage32BaseImpl ? */
 260   WCHAR            filename[PROPERTY_NAME_BUFFER_LEN];
 261
 262   /*
 263    * File header
 264    */
 265   WORD  bigBlockSizeBits;
 266   WORD  smallBlockSizeBits;
 267   ULONG bigBlockSize;
 268   ULONG smallBlockSize;
 269   ULONG bigBlockDepotCount;
 270   ULONG rootStartBlock;
 271   ULONG smallBlockDepotStart;
 272   ULONG extBigBlockDepotStart;
 273   ULONG extBigBlockDepotCount;
 274   ULONG bigBlockDepotStart[COUNT_BBDEPOTINHEADER];
 275
 276   ULONG blockDepotCached[NUM_BLOCKS_PER_DEPOT_BLOCK];
 277   ULONG indexBlockDepotCached;
 278   ULONG prevFreeBlock;
 279
 280   /*
 281    * Abstraction of the big block chains for the chains of the header.
 282    */
 283   BlockChainStream* rootBlockChain;
 284   BlockChainStream* smallBlockDepotChain;
 285   BlockChainStream* smallBlockRootChain;
 286
 287   /*
 288    * Pointer to the big block file abstraction
 289    */
 290   BigBlockFile* bigBlockFile;
 291 };
 292
 293 BOOL StorageImpl_ReadProperty(
 294             StorageImpl*    This,
 295             ULONG           index,
 296             StgProperty*    buffer);
 297
 298 BOOL StorageImpl_WriteProperty(
 299             StorageImpl*        This,
 300             ULONG               index,
 301             const StgProperty*  buffer);
 302
 303 BlockChainStream* Storage32Impl_SmallBlocksToBigBlocks(
 304                       StorageImpl* This,
 305                       SmallBlockChainStream** ppsbChain);
 306
 307 SmallBlockChainStream* Storage32Impl_BigBlocksToSmallBlocks(
 308                       StorageImpl* This,
 309                       BlockChainStream** ppbbChain);
 310
 311 /****************************************************************************
 312  * StgStreamImpl definitions.
 313  *
 314  * This class implements the IStream32 interface and represents a stream
 315  * located inside a storage object.
 316  */
 317 struct StgStreamImpl
 318 {
 319   const IStreamVtbl *lpVtbl;  /* Needs to be the first item in the struct
 320                          * since we want to cast this to an IStream pointer */
 321
 322   /*
 323    * We are an entry in the storage object's stream handler list
 324    */
 325
 326   struct list StrmListEntry;
 327
 328   /*
 329    * Reference count
 330    */
 331   LONG               ref;
 332
 333   /*
 334    * Storage that is the parent(owner) of the stream
 335    */
 336   StorageBaseImpl* parentStorage;
 337
 338   /*
 339    * Access mode of this stream.
 340    */
 341   DWORD grfMode;
 342
 343   /*
 344    * Index of the property that owns (points to) this stream.
 345    */
 346   ULONG              ownerProperty;
 347
 348   /*
 349    * Helper variable that contains the size of the stream
 350    */
 351   ULARGE_INTEGER     streamSize;
 352
 353   /*
 354    * This is the current position of the cursor in the stream
 355    */
 356   ULARGE_INTEGER     currentPosition;
 357
 358   /*
 359    * The information in the stream is represented by a chain of small blocks
 360    * or a chain of large blocks. Depending on the case, one of the two
 361    * following variables points to that information.
 362    */
 363   BlockChainStream*      bigBlockChain;
 364   SmallBlockChainStream* smallBlockChain;
 365 };
 366
 367 /*
 368  * Method definition for the StgStreamImpl class.
 369  */
 370 StgStreamImpl* StgStreamImpl_Construct(
 371                 StorageBaseImpl* parentStorage,
 372     DWORD            grfMode,
 373     ULONG            ownerProperty);
 374
 375
 376 /******************************************************************************
 377  * Endian conversion macros
 378  */
 379 #ifdef WORDS_BIGENDIAN
 380
 381 #define htole32(x) RtlUlongByteSwap(x)
 382 #define htole16(x) RtlUshortByteSwap(x)
 383 #define lendian32toh(x) RtlUlongByteSwap(x)
 384 #define lendian16toh(x) RtlUshortByteSwap(x)
 385
 386 #else
 387
 388 #define htole32(x) (x)
 389 #define htole16(x) (x)
 390 #define lendian32toh(x) (x)
 391 #define lendian16toh(x) (x)
 392
 393 #endif
 394
 395 /******************************************************************************
 396  * The StorageUtl_ functions are miscellaneous utility functions. Most of which
 397  * are abstractions used to read values from file buffers without having to
 398  * worry about bit order
 399  */
 400 void StorageUtl_ReadWord(const BYTE* buffer, ULONG offset, WORD* value);
 401 void StorageUtl_WriteWord(BYTE* buffer, ULONG offset, WORD value);
 402 void StorageUtl_ReadDWord(const BYTE* buffer, ULONG offset, DWORD* value);
 403 void StorageUtl_WriteDWord(BYTE* buffer, ULONG offset, DWORD value);
 404 void StorageUtl_ReadULargeInteger(const BYTE* buffer, ULONG offset,
 405  ULARGE_INTEGER* value);
 406 void StorageUtl_WriteULargeInteger(BYTE* buffer, ULONG offset,
 407  const ULARGE_INTEGER *value);
 408 void StorageUtl_ReadGUID(const BYTE* buffer, ULONG offset, GUID* value);
 409 void StorageUtl_WriteGUID(BYTE* buffer, ULONG offset, const GUID* value);
 410 void StorageUtl_CopyPropertyToSTATSTG(STATSTG* destination, const StgProperty* source,
 411  int statFlags);
 412
 413 /****************************************************************************
 414  * BlockChainStream definitions.
 415  *
 416  * The BlockChainStream class is a utility class that is used to create an
 417  * abstraction of the big block chains in the storage file.
 418  */
 419 struct BlockChainStream
 420 {
 421   StorageImpl* parentStorage;
 422   ULONG*       headOfStreamPlaceHolder;
 423   ULONG        ownerPropertyIndex;
 424   ULONG        lastBlockNoInSequence;
 425   ULONG        lastBlockNoInSequenceIndex;
 426   ULONG        tailIndex;
 427   ULONG        numBlocks;
 428 };
 429
 430 /*
 431  * Methods for the BlockChainStream class.
 432  */
 433 BlockChainStream* BlockChainStream_Construct(
 434                 StorageImpl* parentStorage,
 435                 ULONG*         headOfStreamPlaceHolder,
 436                 ULONG          propertyIndex);
 437
 438 void BlockChainStream_Destroy(
 439                 BlockChainStream* This);
 440
 441 HRESULT BlockChainStream_ReadAt(
 442                 BlockChainStream* This,
 443                 ULARGE_INTEGER offset,
 444                 ULONG          size,
 445                 void*          buffer,
 446                 ULONG*         bytesRead);
 447
 448 HRESULT BlockChainStream_WriteAt(
 449                 BlockChainStream* This,
 450                 ULARGE_INTEGER offset,
 451                 ULONG          size,
 452                 const void*    buffer,
 453                 ULONG*         bytesWritten);
 454
 455 BOOL BlockChainStream_SetSize(
 456                 BlockChainStream* This,
 457                 ULARGE_INTEGER    newSize);
 458
 459 /****************************************************************************
 460  * SmallBlockChainStream definitions.
 461  *
 462  * The SmallBlockChainStream class is a utility class that is used to create an
 463  * abstraction of the small block chains in the storage file.
 464  */
 465 struct SmallBlockChainStream
 466 {
 467   StorageImpl* parentStorage;
 468   ULONG          ownerPropertyIndex;
 469   ULONG*         headOfStreamPlaceHolder;
 470 };
 471
 472 /*
 473  * Methods of the SmallBlockChainStream class.
 474  */
 475 SmallBlockChainStream* SmallBlockChainStream_Construct(
 476            StorageImpl*   parentStorage,
 477            ULONG*         headOfStreamPlaceHolder,
 478            ULONG          propertyIndex);
 479
 480 void SmallBlockChainStream_Destroy(
 481                SmallBlockChainStream* This);
 482
 483 HRESULT SmallBlockChainStream_ReadAt(
 484                SmallBlockChainStream* This,
 485                ULARGE_INTEGER offset,
 486                ULONG          size,
 487                void*          buffer,
 488                ULONG*         bytesRead);
 489
 490 HRESULT SmallBlockChainStream_WriteAt(
 491                SmallBlockChainStream* This,
 492                ULARGE_INTEGER offset,
 493                ULONG          size,
 494                const void*    buffer,
 495                ULONG*         bytesWritten);
 496
 497 BOOL SmallBlockChainStream_SetSize(
 498                SmallBlockChainStream* This,
 499                ULARGE_INTEGER          newSize);
 500
 501
 502 #endif /* __STORAGE32_H__ */