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 #ifndef __STORAGE32_H__
  16 #define __STORAGE32_H__
  17
  18 #include "wtypes.h"
  19 #include "winnt.h"
  20 #include "wine/obj_storage.h"
  21
  22 /*
  23  * Definitions for the file format offsets.
  24  */
  25 static const ULONG OFFSET_BIGBLOCKSIZEBITS   = 0x0000001e;
  26 static const ULONG OFFSET_SMALLBLOCKSIZEBITS = 0x00000020;
  27 static const ULONG OFFSET_BBDEPOTCOUNT       = 0x0000002C;
  28 static const ULONG OFFSET_ROOTSTARTBLOCK     = 0x00000030;
  29 static const ULONG OFFSET_SBDEPOTSTART       = 0x0000003C;
  30 static const ULONG OFFSET_EXTBBDEPOTSTART    = 0x00000044;
  31 static const ULONG OFFSET_EXTBBDEPOTCOUNT    = 0x00000048;
  32 static const ULONG OFFSET_BBDEPOTSTART       = 0x0000004C;
  33 static const ULONG OFFSET_PS_NAME            = 0x00000000;
  34 static const ULONG OFFSET_PS_NAMELENGTH      = 0x00000040;
  35 static const ULONG OFFSET_PS_PROPERTYTYPE    = 0x00000042;
  36 static const ULONG OFFSET_PS_PREVIOUSPROP    = 0x00000044;
  37 static const ULONG OFFSET_PS_NEXTPROP        = 0x00000048;
  38 static const ULONG OFFSET_PS_DIRPROP         = 0x0000004C;
  39 static const ULONG OFFSET_PS_GUID            = 0x00000050;
  40 static const ULONG OFFSET_PS_TSS1            = 0x00000064;
  41 static const ULONG OFFSET_PS_TSD1            = 0x00000068;
  42 static const ULONG OFFSET_PS_TSS2            = 0x0000006C;
  43 static const ULONG OFFSET_PS_TSD2            = 0x00000070;
  44 static const ULONG OFFSET_PS_STARTBLOCK      = 0x00000074;
  45 static const ULONG OFFSET_PS_SIZE            = 0x00000078;
  46 static const WORD  DEF_BIG_BLOCK_SIZE_BITS   = 0x0009;
  47 static const WORD  DEF_SMALL_BLOCK_SIZE_BITS = 0x0006;
  48 static const WORD  DEF_BIG_BLOCK_SIZE        = 0x0200;
  49 static const WORD  DEF_SMALL_BLOCK_SIZE      = 0x0040;
  50 static const ULONG BLOCK_EXTBBDEPOT          = 0xFFFFFFFC;
  51 static const ULONG BLOCK_SPECIAL             = 0xFFFFFFFD;
  52 static const ULONG BLOCK_END_OF_CHAIN        = 0xFFFFFFFE;
  53 static const ULONG BLOCK_UNUSED              = 0xFFFFFFFF;
  54 static const ULONG PROPERTY_NULL             = 0xFFFFFFFF;
  55
  56 #define PROPERTY_NAME_MAX_LEN    0x20
  57 #define PROPERTY_NAME_BUFFER_LEN 0x40
  58
  59 #define PROPSET_BLOCK_SIZE 0x00000080
  60
  61 /*
  62  * Property type of relation
  63  */
  64 #define PROPERTY_RELATION_PREVIOUS 0
  65 #define PROPERTY_RELATION_NEXT     1
  66 #define PROPERTY_RELATION_DIR      2
  67
  68 /*
  69  * Property type constants
  70  */
  71 #define PROPTYPE_STORAGE 0x01
  72 #define PROPTYPE_STREAM  0x02
  73 #define PROPTYPE_ROOT    0x05
  74
  75 /*
  76  * These defines assume a hardcoded blocksize. The code will assert
  77  * if the blocksize is different. Some changes will have to be done if it
  78  * becomes the case.
  79  */
  80 #define BIG_BLOCK_SIZE           0x200
  81 #define COUNT_BBDEPOTINHEADER    109
  82 #define LIMIT_TO_USE_SMALL_BLOCK 0x1000
  83 #define NUM_BLOCKS_PER_DEPOT_BLOCK 128
  84
  85 /*
  86  * These are signatures to detect the type of Document file.
  87  */
  88 static const BYTE STORAGE_magic[8]    ={0xd0,0xcf,0x11,0xe0,0xa1,0xb1,0x1a,0xe1};
  89 static const BYTE STORAGE_oldmagic[8] ={0xd0,0xcf,0x11,0xe0,0x0e,0x11,0xfc,0x0d};
  90
  91 /*
  92  * Forward declarations of all the structures used by the storage
  93  * module.
  94  */
  95 typedef struct StorageBaseImpl     StorageBaseImpl;
  96 typedef struct StorageImpl         StorageImpl;
  97 typedef struct StorageInternalImpl StorageInternalImpl;
  98 typedef struct BlockChainStream      BlockChainStream;
  99 typedef struct SmallBlockChainStream SmallBlockChainStream;
 100 typedef struct IEnumSTATSTGImpl      IEnumSTATSTGImpl;
 101 typedef struct StgProperty           StgProperty;
 102 typedef struct StgStreamImpl         StgStreamImpl;
 103
 104 /*
 105  * This utility structure is used to read/write the information in a storage
 106  * property.
 107  */
 108 struct StgProperty
 109 {
 110   WCHAR          name[PROPERTY_NAME_MAX_LEN];
 111   WORD           sizeOfNameString;
 112   BYTE           propertyType;
 113   ULONG          previousProperty;
 114   ULONG          nextProperty;
 115   ULONG          dirProperty;
 116   GUID           propertyUniqueID;
 117   ULONG          timeStampS1;
 118   ULONG          timeStampD1;
 119   ULONG          timeStampS2;
 120   ULONG          timeStampD2;
 121   ULONG          startingBlock;
 122   ULARGE_INTEGER size;
 123 };
 124
 125 /*************************************************************************
 126  * Big Block File support
 127  *
 128  * The big block file is an abstraction of a flat file separated in
 129  * same sized blocks. The implementation for the methods described in
 130  * this section appear in stg_bigblockfile.c
 131  */
 132
 133 /*
 134  * Declaration of the data structures
 135  */
 136 typedef struct BigBlockFile BigBlockFile,*LPBIGBLOCKFILE;
 137 typedef struct MappedPage   MappedPage,*LPMAPPEDPAGE;
 138 typedef struct BigBlock     BigBlock,*LPBIGBLOCK;
 139
 140 struct BigBlockFile
 141 {
 142   BOOL fileBased;
 143   ULARGE_INTEGER filesize;
 144   ULONG blocksize;
 145   HANDLE hfile;
 146   HANDLE hfilemap;
 147   DWORD flProtect;
 148   MappedPage *maplisthead;
 149   ILockBytes *pLkbyt;
 150   HGLOBAL hbytearray;
 151   LPVOID pbytearray;
 152   BigBlock *headblock;
 153 };
 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 void*          BIGBLOCKFILE_GetBigBlock(LPBIGBLOCKFILE This, ULONG index);
 166 void*          BIGBLOCKFILE_GetROBigBlock(LPBIGBLOCKFILE This, ULONG index);
 167 void           BIGBLOCKFILE_ReleaseBigBlock(LPBIGBLOCKFILE This, void *pBlock);
 168 void           BIGBLOCKFILE_SetSize(LPBIGBLOCKFILE This, ULARGE_INTEGER newSize);
 169 ULARGE_INTEGER BIGBLOCKFILE_GetSize(LPBIGBLOCKFILE This);
 170
 171 /****************************************************************************
 172  * Storage32BaseImpl definitions.
 173  *
 174  * This stucture defines the base information contained in all implementations
 175  * of IStorage32 contained in this filee storage implementation.
 176  *
 177  * In OOP terms, this is the base class for all the IStorage32 implementations
 178  * contained in this file.
 179  */
 180 struct StorageBaseImpl
 181 {
 182   ICOM_VFIELD(IStorage);   /* Needs to be the first item in the stuct
 183                             * since we want to cast this in a Storage32 pointer */
 184
 185   /*
 186    * Reference count of this object
 187    */
 188   ULONG ref;
 189
 190   /*
 191    * Ancestor storage (top level)
 192    */
 193   StorageImpl* ancestorStorage;
 194
 195   /*
 196    * Index of the property for the root of
 197    * this storage
 198    */
 199   ULONG rootPropertySetIndex;
 200
 201   /*
 202    * virtual Destructor method.
 203    */
 204   void (*v_destructor)(StorageBaseImpl*);
 205 };
 206
 207
 208 /*
 209  * Prototypes for the methods of the Storage32BaseImpl class.
 210  */
 211 HRESULT WINAPI StorageBaseImpl_QueryInterface(
 212             IStorage*        iface,
 213             REFIID             riid,
 214             void**             ppvObject);
 215
 216 ULONG WINAPI StorageBaseImpl_AddRef(
 217             IStorage*        iface);
 218
 219 ULONG WINAPI StorageBaseImpl_Release(
 220             IStorage*        iface);
 221
 222 HRESULT WINAPI StorageBaseImpl_OpenStream(
 223             IStorage*        iface,
 224             const OLECHAR*   pwcsName,  /* [string][in] */
 225             void*              reserved1, /* [unique][in] */
 226             DWORD              grfMode,   /* [in] */
 227             DWORD              reserved2, /* [in] */
 228             IStream**        ppstm);    /* [out] */
 229
 230 HRESULT WINAPI StorageBaseImpl_OpenStorage(
 231             IStorage*        iface,
 232             const OLECHAR*   pwcsName,      /* [string][unique][in] */
 233             IStorage*        pstgPriority,  /* [unique][in] */
 234             DWORD              grfMode,       /* [in] */
 235             SNB              snbExclude,    /* [unique][in] */
 236             DWORD              reserved,      /* [in] */
 237             IStorage**       ppstg);        /* [out] */
 238
 239 HRESULT WINAPI StorageBaseImpl_EnumElements(
 240             IStorage*        iface,
 241             DWORD              reserved1, /* [in] */
 242             void*              reserved2, /* [size_is][unique][in] */
 243             DWORD              reserved3, /* [in] */
 244             IEnumSTATSTG**     ppenum);   /* [out] */
 245
 246 HRESULT WINAPI StorageBaseImpl_Stat(
 247             IStorage*        iface,
 248             STATSTG*           pstatstg,     /* [out] */
 249             DWORD              grfStatFlag); /* [in] */
 250
 251 HRESULT WINAPI StorageBaseImpl_RenameElement(
 252             IStorage*        iface,
 253             const OLECHAR*   pwcsOldName,  /* [string][in] */
 254             const OLECHAR*   pwcsNewName); /* [string][in] */
 255
 256 HRESULT WINAPI StorageBaseImpl_CreateStream(
 257             IStorage*        iface,
 258             const OLECHAR*   pwcsName,  /* [string][in] */
 259             DWORD              grfMode,   /* [in] */
 260             DWORD              reserved1, /* [in] */
 261             DWORD              reserved2, /* [in] */
 262             IStream**        ppstm);    /* [out] */
 263
 264 HRESULT WINAPI StorageBaseImpl_SetClass(
 265             IStorage*        iface,
 266             REFCLSID           clsid);  /* [in] */
 267
 268 /****************************************************************************
 269  * Storage32Impl definitions.
 270  *
 271  * This implementation of the IStorage32 interface represents a root
 272  * storage. Basically, a document file.
 273  */
 274 struct StorageImpl
 275 {
 276   ICOM_VFIELD(IStorage);   /* Needs to be the first item in the stuct
 277                                       * since we want to cast this in a Storage32 pointer */
 278
 279   /*
 280    * Declare the member of the Storage32BaseImpl class to allow
 281    * casting as a Storage32BaseImpl
 282    */
 283   ULONG                 ref;
 284   struct StorageImpl* ancestorStorage;
 285   ULONG                 rootPropertySetIndex;
 286   void (*v_destructor)(struct StorageImpl*);
 287
 288   /*
 289    * The following data members are specific to the Storage32Impl
 290    * class
 291    */
 292   HANDLE           hFile;      /* Physical support for the Docfile */
 293
 294   /*
 295    * File header
 296    */
 297   WORD  bigBlockSizeBits;
 298   WORD  smallBlockSizeBits;
 299   ULONG bigBlockSize;
 300   ULONG smallBlockSize;
 301   ULONG bigBlockDepotCount;
 302   ULONG rootStartBlock;
 303   ULONG smallBlockDepotStart;
 304   ULONG extBigBlockDepotStart;
 305   ULONG extBigBlockDepotCount;
 306   ULONG bigBlockDepotStart[COUNT_BBDEPOTINHEADER];
 307
 308   ULONG blockDepotCached[NUM_BLOCKS_PER_DEPOT_BLOCK];
 309   ULONG indexBlockDepotCached;
 310   ULONG prevFreeBlock;
 311
 312   /*
 313    * Abstraction of the big block chains for the chains of the header.
 314    */
 315   BlockChainStream* rootBlockChain;
 316   BlockChainStream* smallBlockDepotChain;
 317   BlockChainStream* smallBlockRootChain;
 318
 319   /*
 320    * Pointer to the big block file abstraction
 321    */
 322   BigBlockFile* bigBlockFile;
 323 };
 324
 325 /*
 326  * Method declaration for the Storage32Impl class
 327  */
 328
 329 HRESULT WINAPI StorageImpl_CreateStorage(
 330             IStorage*      iface,
 331             const OLECHAR* pwcsName,  /* [string][in] */
 332             DWORD            grfMode,   /* [in] */
 333             DWORD            dwStgFmt,  /* [in] */
 334             DWORD            reserved2, /* [in] */
 335             IStorage**     ppstg);    /* [out] */
 336
 337 HRESULT WINAPI StorageImpl_CopyTo(
 338             IStorage*      iface,
 339             DWORD          ciidExclude,  /* [in] */
 340             const IID*     rgiidExclude, /* [size_is][unique][in] */
 341             SNB            snbExclude, /* [unique][in] */
 342             IStorage*    pstgDest);    /* [unique][in] */
 343
 344 HRESULT WINAPI StorageImpl_MoveElementTo(
 345             IStorage*      iface,
 346             const OLECHAR* pwcsName,    /* [string][in] */
 347             IStorage*      pstgDest,    /* [unique][in] */
 348             const OLECHAR* pwcsNewName, /* [string][in] */
 349             DWORD            grfFlags);   /* [in] */
 350
 351 HRESULT WINAPI StorageImpl_Commit(
 352             IStorage*      iface,
 353             DWORD          grfCommitFlags); /* [in] */
 354
 355 HRESULT WINAPI StorageImpl_Revert(
 356             IStorage*      iface);
 357
 358 HRESULT WINAPI StorageImpl_DestroyElement(
 359             IStorage*      iface,
 360             const OLECHAR* pwcsName); /* [string][in] */
 361
 362 HRESULT WINAPI StorageImpl_SetElementTimes(
 363             IStorage*      iface,
 364             const OLECHAR* pwcsName, /* [string][in] */
 365             const FILETIME*  pctime,   /* [in] */
 366             const FILETIME*  patime,   /* [in] */
 367             const FILETIME*  pmtime);  /* [in] */
 368
 369 HRESULT WINAPI StorageImpl_SetStateBits(
 370             IStorage*      iface,
 371             DWORD          grfStateBits, /* [in] */
 372             DWORD          grfMask);     /* [in] */
 373
 374 void StorageImpl_Destroy(
 375             StorageImpl* This);
 376
 377 HRESULT StorageImpl_Construct(
 378             StorageImpl* This,
 379             HANDLE       hFile,
 380       ILockBytes*  pLkbyt,
 381             DWORD        openFlags,
 382       BOOL         fileBased);
 383
 384 BOOL StorageImpl_ReadBigBlock(
 385             StorageImpl* This,
 386             ULONG          blockIndex,
 387             void*          buffer);
 388
 389 BOOL StorageImpl_WriteBigBlock(
 390             StorageImpl* This,
 391             ULONG          blockIndex,
 392             void*          buffer);
 393
 394 void* StorageImpl_GetROBigBlock(
 395             StorageImpl* This,
 396             ULONG          blockIndex);
 397
 398 void* StorageImpl_GetBigBlock(
 399             StorageImpl* This,
 400             ULONG          blockIndex);
 401
 402 void StorageImpl_ReleaseBigBlock(
 403             StorageImpl* This,
 404             void*          pBigBlock);
 405
 406 ULONG StorageImpl_GetNextFreeBigBlock(
 407             StorageImpl* This);
 408
 409 void StorageImpl_FreeBigBlock(
 410             StorageImpl* This,
 411             ULONG blockIndex);
 412
 413 ULONG StorageImpl_GetNextBlockInChain(
 414             StorageImpl* This,
 415             ULONG blockIndex);
 416
 417 void StorageImpl_SetNextBlockInChain(
 418             StorageImpl* This,
 419             ULONG blockIndex,
 420       ULONG nextBlock);
 421
 422 HRESULT StorageImpl_LoadFileHeader(
 423             StorageImpl* This);
 424
 425 void StorageImpl_SaveFileHeader(
 426             StorageImpl* This);
 427
 428 BOOL StorageImpl_ReadProperty(
 429             StorageImpl* This,
 430             ULONG          index,
 431             StgProperty*    buffer);
 432
 433 BOOL StorageImpl_WriteProperty(
 434             StorageImpl* This,
 435             ULONG          index,
 436             StgProperty*   buffer);
 437
 438 BlockChainStream* Storage32Impl_SmallBlocksToBigBlocks(
 439                       StorageImpl* This,
 440                       SmallBlockChainStream** ppsbChain);
 441
 442 ULONG Storage32Impl_GetNextExtendedBlock(StorageImpl* This,
 443                                          ULONG blockIndex);
 444
 445 void Storage32Impl_AddBlockDepot(StorageImpl* This,
 446                                  ULONG blockIndex);
 447
 448 ULONG Storage32Impl_AddExtBlockDepot(StorageImpl* This);
 449
 450 ULONG Storage32Impl_GetExtDepotBlock(StorageImpl* This,
 451                                      ULONG depotIndex);
 452
 453 void Storage32Impl_SetExtDepotBlock(StorageImpl* This,
 454                                     ULONG depotIndex,
 455                                     ULONG blockIndex);
 456 /****************************************************************************
 457  * Storage32InternalImpl definitions.
 458  *
 459  * Definition of the implementation structure for the IStorage32 interface.
 460  * This one implements the IStorage32 interface for storage that are
 461  * inside another storage.
 462  */
 463 struct StorageInternalImpl
 464 {
 465   ICOM_VFIELD(IStorage);        /* Needs to be the first item in the stuct
 466                                  * since we want to cast this in a Storage32 pointer */
 467
 468   /*
 469    * Declare the member of the Storage32BaseImpl class to allow
 470    * casting as a Storage32BaseImpl
 471    */
 472   ULONG                      ref;
 473   struct StorageImpl* ancestorStorage;
 474   ULONG                    rootPropertySetIndex;
 475   void (*v_destructor)(struct StorageInternalImpl*);
 476
 477   /*
 478    * There is no specific data for this class.
 479    */
 480 };
 481
 482 /*
 483  * Method definitions for the Storage32InternalImpl class.
 484  */
 485 StorageInternalImpl* StorageInternalImpl_Construct(
 486             StorageImpl* ancestorStorage,
 487             ULONG          rootTropertyIndex);
 488
 489 void StorageInternalImpl_Destroy(
 490             StorageInternalImpl* This);
 491
 492 HRESULT WINAPI StorageInternalImpl_Commit(
 493             IStorage*            iface,
 494             DWORD                  grfCommitFlags); /* [in] */
 495
 496 HRESULT WINAPI StorageInternalImpl_Revert(
 497             IStorage*            iface);
 498
 499
 500 /****************************************************************************
 501  * IEnumSTATSTGImpl definitions.
 502  *
 503  * Definition of the implementation structure for the IEnumSTATSTGImpl interface.
 504  * This class allows iterating through the content of a storage and to find
 505  * specific items inside it.
 506  */
 507 struct IEnumSTATSTGImpl
 508 {
 509   ICOM_VFIELD(IEnumSTATSTG);    /* Needs to be the first item in the stuct
 510                                          * since we want to cast this in a IEnumSTATSTG pointer */
 511
 512   ULONG          ref;                   /* Reference count */
 513   StorageImpl* parentStorage;         /* Reference to the parent storage */
 514   ULONG          firstPropertyNode;     /* Index of the root of the storage to enumerate */
 515
 516   /*
 517    * The current implementation of the IEnumSTATSTGImpl class uses a stack
 518    * to walk the property sets to get the content of a storage. This stack
 519    * is implemented by the following 3 data members
 520    */
 521   ULONG          stackSize;
 522   ULONG          stackMaxSize;
 523   ULONG*         stackToVisit;
 524
 525 #define ENUMSTATSGT_SIZE_INCREMENT 10
 526 };
 527
 528 /*
 529  * Method definitions for the IEnumSTATSTGImpl class.
 530  */
 531 HRESULT WINAPI IEnumSTATSTGImpl_QueryInterface(
 532             IEnumSTATSTG*     iface,
 533             REFIID            riid,
 534             void**            ppvObject);
 535
 536 ULONG WINAPI IEnumSTATSTGImpl_AddRef(
 537             IEnumSTATSTG*     iface);
 538
 539 ULONG WINAPI IEnumSTATSTGImpl_Release(
 540             IEnumSTATSTG*     iface);
 541
 542 HRESULT WINAPI IEnumSTATSTGImpl_Next(
 543             IEnumSTATSTG*     iface,
 544             ULONG             celt,
 545             STATSTG*          rgelt,
 546             ULONG*            pceltFetched);
 547
 548 HRESULT WINAPI IEnumSTATSTGImpl_Skip(
 549             IEnumSTATSTG*     iface,
 550             ULONG             celt);
 551
 552 HRESULT WINAPI IEnumSTATSTGImpl_Reset(
 553             IEnumSTATSTG* iface);
 554
 555 HRESULT WINAPI IEnumSTATSTGImpl_Clone(
 556             IEnumSTATSTG*     iface,
 557             IEnumSTATSTG**    ppenum);
 558
 559 IEnumSTATSTGImpl* IEnumSTATSTGImpl_Construct(
 560             StorageImpl* This,
 561             ULONG          firstPropertyNode);
 562
 563 void IEnumSTATSTGImpl_Destroy(
 564             IEnumSTATSTGImpl* This);
 565
 566 void IEnumSTATSTGImpl_PushSearchNode(
 567             IEnumSTATSTGImpl* This,
 568             ULONG             nodeToPush);
 569
 570 ULONG IEnumSTATSTGImpl_PopSearchNode(
 571             IEnumSTATSTGImpl* This,
 572             BOOL            remove);
 573
 574 ULONG IEnumSTATSTGImpl_FindProperty(
 575             IEnumSTATSTGImpl* This,
 576             const OLECHAR*  lpszPropName,
 577             StgProperty*      buffer);
 578
 579 INT IEnumSTATSTGImpl_FindParentProperty(
 580   IEnumSTATSTGImpl *This,
 581   ULONG             childProperty,
 582   StgProperty      *currentProperty,
 583   ULONG            *propertyId);
 584
 585
 586 /****************************************************************************
 587  * StgStreamImpl definitions.
 588  *
 589  * This class imlements the IStream32 inteface and represents a stream
 590  * located inside a storage object.
 591  */
 592 struct StgStreamImpl
 593 {
 594   ICOM_VFIELD(IStream);  /* Needs to be the first item in the stuct
 595                                     * since we want to cast this in a IStream pointer */
 596
 597   /*
 598    * Reference count
 599    */
 600   ULONG              ref;
 601
 602   /*
 603    * Storage that is the parent(owner) of the stream
 604    */
 605   StorageBaseImpl* parentStorage;
 606
 607   /*
 608    * Index of the property that owns (points to) this stream.
 609    */
 610   ULONG              ownerProperty;
 611
 612   /*
 613    * Helper variable that contains the size of the stream
 614    */
 615   ULARGE_INTEGER     streamSize;
 616
 617   /*
 618    * This is the current position of the cursor in the stream
 619    */
 620   ULARGE_INTEGER     currentPosition;
 621
 622   /*
 623    * The information in the stream is represented by a chain of small blocks
 624    * or a chain of large blocks. Depending on the case, one of the two
 625    * following variabled points to that information.
 626    */
 627   BlockChainStream*      bigBlockChain;
 628   SmallBlockChainStream* smallBlockChain;
 629
 630 };
 631
 632 /*
 633  * Method definition for the StgStreamImpl class.
 634  */
 635 StgStreamImpl* StgStreamImpl_Construct(
 636                 StorageBaseImpl* parentStorage,
 637                 ULONG              ownerProperty);
 638
 639 void StgStreamImpl_Destroy(
 640                 StgStreamImpl* This);
 641
 642 void StgStreamImpl_OpenBlockChain(
 643                 StgStreamImpl* This);
 644
 645 HRESULT WINAPI StgStreamImpl_QueryInterface(
 646                 IStream*      iface,
 647                 REFIID         riid,            /* [in] */
 648                 void**         ppvObject);  /* [iid_is][out] */
 649
 650 ULONG WINAPI StgStreamImpl_AddRef(
 651                 IStream*      iface);
 652
 653 ULONG WINAPI StgStreamImpl_Release(
 654                 IStream*      iface);
 655
 656 HRESULT WINAPI StgStreamImpl_Read(
 657                 IStream*      iface,
 658                 void*          pv,        /* [length_is][size_is][out] */
 659                 ULONG          cb,        /* [in] */
 660                 ULONG*         pcbRead);  /* [out] */
 661
 662 HRESULT WINAPI StgStreamImpl_Write(
 663                 IStream*      iface,
 664                 const void*    pv,          /* [size_is][in] */
 665                 ULONG          cb,          /* [in] */
 666                 ULONG*         pcbWritten); /* [out] */
 667
 668 HRESULT WINAPI StgStreamImpl_Seek(
 669                 IStream*      iface,
 670                 LARGE_INTEGER   dlibMove,         /* [in] */
 671                 DWORD           dwOrigin,         /* [in] */
 672                 ULARGE_INTEGER* plibNewPosition); /* [out] */
 673
 674 HRESULT WINAPI StgStreamImpl_SetSize(
 675                 IStream*      iface,
 676                 ULARGE_INTEGER  libNewSize);  /* [in] */
 677
 678 HRESULT WINAPI StgStreamImpl_CopyTo(
 679                 IStream*      iface,
 680                 IStream*      pstm,         /* [unique][in] */
 681                 ULARGE_INTEGER  cb,           /* [in] */
 682                 ULARGE_INTEGER* pcbRead,      /* [out] */
 683                 ULARGE_INTEGER* pcbWritten);  /* [out] */
 684
 685 HRESULT WINAPI StgStreamImpl_Commit(
 686                 IStream*      iface,
 687                 DWORD           grfCommitFlags); /* [in] */
 688
 689 HRESULT WINAPI StgStreamImpl_Revert(
 690                 IStream*  iface);
 691
 692 HRESULT WINAPI StgStreamImpl_LockRegion(
 693                 IStream*     iface,
 694                 ULARGE_INTEGER libOffset,   /* [in] */
 695                 ULARGE_INTEGER cb,          /* [in] */
 696                 DWORD          dwLockType); /* [in] */
 697
 698 HRESULT WINAPI StgStreamImpl_UnlockRegion(
 699                 IStream*     iface,
 700                 ULARGE_INTEGER libOffset,   /* [in] */
 701                 ULARGE_INTEGER cb,          /* [in] */
 702                 DWORD          dwLockType); /* [in] */
 703
 704 HRESULT WINAPI StgStreamImpl_Stat(
 705                 IStream*     iface,
 706                 STATSTG*       pstatstg,     /* [out] */
 707                 DWORD          grfStatFlag); /* [in] */
 708
 709 HRESULT WINAPI StgStreamImpl_Clone(
 710                 IStream*     iface,
 711                 IStream**    ppstm);       /* [out] */
 712
 713
 714 /********************************************************************************
 715  * The StorageUtl_ functions are miscelaneous utility functions. Most of which are
 716  * abstractions used to read values from file buffers without having to worry
 717  * about bit order
 718  */
 719 void StorageUtl_ReadWord(void* buffer, ULONG offset, WORD* value);
 720 void StorageUtl_WriteWord(void* buffer, ULONG offset, WORD value);
 721 void StorageUtl_ReadDWord(void* buffer, ULONG offset, DWORD* value);
 722 void StorageUtl_WriteDWord(void* buffer, ULONG offset, DWORD value);
 723 void StorageUtl_ReadGUID(void* buffer, ULONG offset, GUID* value);
 724 void StorageUtl_WriteGUID(void* buffer, ULONG offset, GUID* value);
 725 void StorageUtl_CopyPropertyToSTATSTG(STATSTG*     destination,
 726                                              StgProperty* source,
 727                                              int          statFlags);
 728
 729 /****************************************************************************
 730  * BlockChainStream definitions.
 731  *
 732  * The BlockChainStream class is a utility class that is used to create an
 733  * abstraction of the big block chains in the storage file.
 734  */
 735 struct BlockChainStream
 736 {
 737   StorageImpl* parentStorage;
 738   ULONG*       headOfStreamPlaceHolder;
 739   ULONG        ownerPropertyIndex;
 740   ULONG        lastBlockNoInSequence;
 741   ULONG        lastBlockNoInSequenceIndex;
 742   ULONG        tailIndex;
 743   ULONG        numBlocks;
 744 };
 745
 746 /*
 747  * Methods for the BlockChainStream class.
 748  */
 749 BlockChainStream* BlockChainStream_Construct(
 750                 StorageImpl* parentStorage,
 751                 ULONG*         headOfStreamPlaceHolder,
 752                 ULONG          propertyIndex);
 753
 754 void BlockChainStream_Destroy(
 755                 BlockChainStream* This);
 756
 757 ULONG BlockChainStream_GetHeadOfChain(
 758                 BlockChainStream* This);
 759
 760 BOOL BlockChainStream_ReadAt(
 761                 BlockChainStream* This,
 762                 ULARGE_INTEGER offset,
 763                 ULONG          size,
 764                 void*          buffer,
 765                 ULONG*         bytesRead);
 766
 767 BOOL BlockChainStream_WriteAt(
 768                 BlockChainStream* This,
 769                 ULARGE_INTEGER offset,
 770                 ULONG          size,
 771                 const void*    buffer,
 772                 ULONG*         bytesWritten);
 773
 774 BOOL BlockChainStream_SetSize(
 775                 BlockChainStream* This,
 776                 ULARGE_INTEGER    newSize);
 777
 778 ULARGE_INTEGER BlockChainStream_GetSize(
 779     BlockChainStream* This);
 780
 781 ULONG BlockChainStream_GetCount(
 782     BlockChainStream* This);
 783
 784 /****************************************************************************
 785  * SmallBlockChainStream definitions.
 786  *
 787  * The SmallBlockChainStream class is a utility class that is used to create an
 788  * abstraction of the small block chains in the storage file.
 789  */
 790 struct SmallBlockChainStream
 791 {
 792   StorageImpl* parentStorage;
 793   ULONG          ownerPropertyIndex;
 794 };
 795
 796 /*
 797  * Methods of the SmallBlockChainStream class.
 798  */
 799 SmallBlockChainStream* SmallBlockChainStream_Construct(
 800                StorageImpl* parentStorage,
 801                ULONG          propertyIndex);
 802
 803 void SmallBlockChainStream_Destroy(
 804                SmallBlockChainStream* This);
 805
 806 ULONG SmallBlockChainStream_GetHeadOfChain(
 807                SmallBlockChainStream* This);
 808
 809 ULONG SmallBlockChainStream_GetNextBlockInChain(
 810                SmallBlockChainStream* This,
 811                ULONG                  blockIndex);
 812
 813 void SmallBlockChainStream_SetNextBlockInChain(
 814          SmallBlockChainStream* This,
 815          ULONG                  blockIndex,
 816          ULONG                  nextBlock);
 817
 818 void SmallBlockChainStream_FreeBlock(
 819          SmallBlockChainStream* This,
 820          ULONG                  blockIndex);
 821
 822 ULONG SmallBlockChainStream_GetNextFreeBlock(
 823          SmallBlockChainStream* This);
 824
 825 BOOL SmallBlockChainStream_ReadAt(
 826                SmallBlockChainStream* This,
 827                ULARGE_INTEGER offset,
 828                ULONG          size,
 829                void*          buffer,
 830                ULONG*         bytesRead);
 831
 832 BOOL SmallBlockChainStream_WriteAt(
 833                SmallBlockChainStream* This,
 834                ULARGE_INTEGER offset,
 835                ULONG          size,
 836                const void*    buffer,
 837                ULONG*         bytesWritten);
 838
 839 BOOL SmallBlockChainStream_SetSize(
 840                SmallBlockChainStream* This,
 841                ULARGE_INTEGER          newSize);
 842
 843 ULARGE_INTEGER SmallBlockChainStream_GetSize(
 844          SmallBlockChainStream* This);
 845
 846 ULONG SmallBlockChainStream_GetCount(
 847          SmallBlockChainStream* This);
 848
 849
 850 #endif /* __STORAGE32_H__ */
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