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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 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 SmallBlockChainStream* Storage32Impl_BigBlocksToSmallBlocks(
 310                       StorageImpl* This,
 311                       BlockChainStream** ppbbChain);
 312
 313 /****************************************************************************
 314  * StgStreamImpl definitions.
 315  *
 316  * This class implements the IStream32 interface and represents a stream
 317  * located inside a storage object.
 318  */
 319 struct StgStreamImpl
 320 {
 321   const IStreamVtbl *lpVtbl;  /* Needs to be the first item in the struct
 322                          * since we want to cast this to an IStream pointer */
 323
 324   /*
 325    * We are an entry in the storage object's stream handler list
 326    */
 327
 328   struct list StrmListEntry;
 329
 330   /*
 331    * Reference count
 332    */
 333   LONG               ref;
 334
 335   /*
 336    * Storage that is the parent(owner) of the stream
 337    */
 338   StorageBaseImpl* parentStorage;
 339
 340   /*
 341    * Access mode of this stream.
 342    */
 343   DWORD grfMode;
 344
 345   /*
 346    * Index of the property that owns (points to) this stream.
 347    */
 348   ULONG              ownerProperty;
 349
 350   /*
 351    * Helper variable that contains the size of the stream
 352    */
 353   ULARGE_INTEGER     streamSize;
 354
 355   /*
 356    * This is the current position of the cursor in the stream
 357    */
 358   ULARGE_INTEGER     currentPosition;
 359
 360   /*
 361    * The information in the stream is represented by a chain of small blocks
 362    * or a chain of large blocks. Depending on the case, one of the two
 363    * following variables points to that information.
 364    */
 365   BlockChainStream*      bigBlockChain;
 366   SmallBlockChainStream* smallBlockChain;
 367 };
 368
 369 /*
 370  * Method definition for the StgStreamImpl class.
 371  */
 372 StgStreamImpl* StgStreamImpl_Construct(
 373                 StorageBaseImpl* parentStorage,
 374     DWORD            grfMode,
 375     ULONG            ownerProperty);
 376
 377
 378 /******************************************************************************
 379  * Endian conversion macros
 380  */
 381 #ifdef WORDS_BIGENDIAN
 382
 383 #define htole32(x) RtlUlongByteSwap(x)
 384 #define htole16(x) RtlUshortByteSwap(x)
 385 #define lendian32toh(x) RtlUlongByteSwap(x)
 386 #define lendian16toh(x) RtlUshortByteSwap(x)
 387
 388 #else
 389
 390 #define htole32(x) (x)
 391 #define htole16(x) (x)
 392 #define lendian32toh(x) (x)
 393 #define lendian16toh(x) (x)
 394
 395 #endif
 396
 397 /******************************************************************************
 398  * The StorageUtl_ functions are miscellaneous utility functions. Most of which
 399  * are abstractions used to read values from file buffers without having to
 400  * worry about bit order
 401  */
 402 void StorageUtl_ReadWord(const BYTE* buffer, ULONG offset, WORD* value);
 403 void StorageUtl_WriteWord(BYTE* buffer, ULONG offset, WORD value);
 404 void StorageUtl_ReadDWord(const BYTE* buffer, ULONG offset, DWORD* value);
 405 void StorageUtl_WriteDWord(BYTE* buffer, ULONG offset, DWORD value);
 406 void StorageUtl_ReadULargeInteger(const BYTE* buffer, ULONG offset,
 407  ULARGE_INTEGER* value);
 408 void StorageUtl_WriteULargeInteger(BYTE* buffer, ULONG offset,
 409  const ULARGE_INTEGER *value);
 410 void StorageUtl_ReadGUID(const BYTE* buffer, ULONG offset, GUID* value);
 411 void StorageUtl_WriteGUID(BYTE* buffer, ULONG offset, const GUID* value);
 412 void StorageUtl_CopyPropertyToSTATSTG(STATSTG* destination, const StgProperty* source,
 413  int statFlags);
 414
 415 /****************************************************************************
 416  * BlockChainStream definitions.
 417  *
 418  * The BlockChainStream class is a utility class that is used to create an
 419  * abstraction of the big block chains in the storage file.
 420  */
 421 struct BlockChainStream
 422 {
 423   StorageImpl* parentStorage;
 424   ULONG*       headOfStreamPlaceHolder;
 425   ULONG        ownerPropertyIndex;
 426   ULONG        lastBlockNoInSequence;
 427   ULONG        lastBlockNoInSequenceIndex;
 428   ULONG        tailIndex;
 429   ULONG        numBlocks;
 430 };
 431
 432 /*
 433  * Methods for the BlockChainStream class.
 434  */
 435 BlockChainStream* BlockChainStream_Construct(
 436                 StorageImpl* parentStorage,
 437                 ULONG*         headOfStreamPlaceHolder,
 438                 ULONG          propertyIndex);
 439
 440 void BlockChainStream_Destroy(
 441                 BlockChainStream* This);
 442
 443 HRESULT BlockChainStream_ReadAt(
 444                 BlockChainStream* This,
 445                 ULARGE_INTEGER offset,
 446                 ULONG          size,
 447                 void*          buffer,
 448                 ULONG*         bytesRead);
 449
 450 HRESULT BlockChainStream_WriteAt(
 451                 BlockChainStream* This,
 452                 ULARGE_INTEGER offset,
 453                 ULONG          size,
 454                 const void*    buffer,
 455                 ULONG*         bytesWritten);
 456
 457 BOOL BlockChainStream_SetSize(
 458                 BlockChainStream* This,
 459                 ULARGE_INTEGER    newSize);
 460
 461 /****************************************************************************
 462  * SmallBlockChainStream definitions.
 463  *
 464  * The SmallBlockChainStream class is a utility class that is used to create an
 465  * abstraction of the small block chains in the storage file.
 466  */
 467 struct SmallBlockChainStream
 468 {
 469   StorageImpl* parentStorage;
 470   ULONG          ownerPropertyIndex;
 471   ULONG*         headOfStreamPlaceHolder;
 472 };
 473
 474 /*
 475  * Methods of the SmallBlockChainStream class.
 476  */
 477 SmallBlockChainStream* SmallBlockChainStream_Construct(
 478            StorageImpl*   parentStorage,
 479            ULONG*         headOfStreamPlaceHolder,
 480            ULONG          propertyIndex);
 481
 482 void SmallBlockChainStream_Destroy(
 483                SmallBlockChainStream* This);
 484
 485 HRESULT SmallBlockChainStream_ReadAt(
 486                SmallBlockChainStream* This,
 487                ULARGE_INTEGER offset,
 488                ULONG          size,
 489                void*          buffer,
 490                ULONG*         bytesRead);
 491
 492 HRESULT SmallBlockChainStream_WriteAt(
 493                SmallBlockChainStream* This,
 494                ULARGE_INTEGER offset,
 495                ULONG          size,
 496                const void*    buffer,
 497                ULONG*         bytesWritten);
 498
 499 BOOL SmallBlockChainStream_SetSize(
 500                SmallBlockChainStream* This,
 501                ULARGE_INTEGER          newSize);
 502
 503
 504 #endif /* __STORAGE32_H__ */