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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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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
  39 /*
  40  * Definitions for the file format offsets.
  41  */
  42 static const ULONG OFFSET_BIGBLOCKSIZEBITS   = 0x0000001e;
  43 static const ULONG OFFSET_SMALLBLOCKSIZEBITS = 0x00000020;
  44 static const ULONG OFFSET_BBDEPOTCOUNT       = 0x0000002C;
  45 static const ULONG OFFSET_ROOTSTARTBLOCK     = 0x00000030;
  46 static const ULONG OFFSET_SBDEPOTSTART       = 0x0000003C;
  47 static const ULONG OFFSET_SBDEPOTCOUNT       = 0x00000040;
  48 static const ULONG OFFSET_EXTBBDEPOTSTART    = 0x00000044;
  49 static const ULONG OFFSET_EXTBBDEPOTCOUNT    = 0x00000048;
  50 static const ULONG OFFSET_BBDEPOTSTART       = 0x0000004C;
  51 static const ULONG OFFSET_PS_NAME            = 0x00000000;
  52 static const ULONG OFFSET_PS_NAMELENGTH      = 0x00000040;
  53 static const ULONG OFFSET_PS_PROPERTYTYPE    = 0x00000042;
  54 static const ULONG OFFSET_PS_PREVIOUSPROP    = 0x00000044;
  55 static const ULONG OFFSET_PS_NEXTPROP        = 0x00000048;
  56 static const ULONG OFFSET_PS_DIRPROP         = 0x0000004C;
  57 static const ULONG OFFSET_PS_GUID            = 0x00000050;
  58 static const ULONG OFFSET_PS_TSS1            = 0x00000064;
  59 static const ULONG OFFSET_PS_TSD1            = 0x00000068;
  60 static const ULONG OFFSET_PS_TSS2            = 0x0000006C;
  61 static const ULONG OFFSET_PS_TSD2            = 0x00000070;
  62 static const ULONG OFFSET_PS_STARTBLOCK      = 0x00000074;
  63 static const ULONG OFFSET_PS_SIZE            = 0x00000078;
  64 static const WORD  DEF_BIG_BLOCK_SIZE_BITS   = 0x0009;
  65 static const WORD  DEF_SMALL_BLOCK_SIZE_BITS = 0x0006;
  66 static const WORD  DEF_BIG_BLOCK_SIZE        = 0x0200;
  67 static const WORD  DEF_SMALL_BLOCK_SIZE      = 0x0040;
  68 static const ULONG BLOCK_EXTBBDEPOT          = 0xFFFFFFFC;
  69 static const ULONG BLOCK_SPECIAL             = 0xFFFFFFFD;
  70 static const ULONG BLOCK_END_OF_CHAIN        = 0xFFFFFFFE;
  71 static const ULONG BLOCK_UNUSED              = 0xFFFFFFFF;
  72 static const ULONG PROPERTY_NULL             = 0xFFFFFFFF;
  73
  74 #define PROPERTY_NAME_MAX_LEN    0x20
  75 #define PROPERTY_NAME_BUFFER_LEN 0x40
  76
  77 #define PROPSET_BLOCK_SIZE 0x00000080
  78
  79 /*
  80  * Property type of relation
  81  */
  82 #define PROPERTY_RELATION_PREVIOUS 0
  83 #define PROPERTY_RELATION_NEXT     1
  84 #define PROPERTY_RELATION_DIR      2
  85
  86 /*
  87  * Property type constants
  88  */
  89 #define PROPTYPE_STORAGE 0x01
  90 #define PROPTYPE_STREAM  0x02
  91 #define PROPTYPE_ROOT    0x05
  92
  93 /*
  94  * These defines assume a hardcoded blocksize. The code will assert
  95  * if the blocksize is different. Some changes will have to be done if it
  96  * becomes the case.
  97  */
  98 #define BIG_BLOCK_SIZE           0x200
  99 #define COUNT_BBDEPOTINHEADER    109
 100 #define LIMIT_TO_USE_SMALL_BLOCK 0x1000
 101 #define NUM_BLOCKS_PER_DEPOT_BLOCK 128
 102
 103 /*
 104  * These are signatures to detect the type of Document file.
 105  */
 106 static const BYTE STORAGE_magic[8]    ={0xd0,0xcf,0x11,0xe0,0xa1,0xb1,0x1a,0xe1};
 107 static const BYTE STORAGE_oldmagic[8] ={0xd0,0xcf,0x11,0xe0,0x0e,0x11,0xfc,0x0d};
 108
 109 /*
 110  * Forward declarations of all the structures used by the storage
 111  * module.
 112  */
 113 typedef struct StorageBaseImpl     StorageBaseImpl;
 114 typedef struct StorageImpl         StorageImpl;
 115 typedef struct StorageInternalImpl StorageInternalImpl;
 116 typedef struct BlockChainStream      BlockChainStream;
 117 typedef struct SmallBlockChainStream SmallBlockChainStream;
 118 typedef struct IEnumSTATSTGImpl      IEnumSTATSTGImpl;
 119 typedef struct StgProperty           StgProperty;
 120 typedef struct StgStreamImpl         StgStreamImpl;
 121
 122 /*
 123  * This utility structure is used to read/write the information in a storage
 124  * property.
 125  */
 126 struct StgProperty
 127 {
 128   WCHAR          name[PROPERTY_NAME_MAX_LEN];
 129   WORD           sizeOfNameString;
 130   BYTE           propertyType;
 131   ULONG          previousProperty;
 132   ULONG          nextProperty;
 133   ULONG          dirProperty;
 134   GUID           propertyUniqueID;
 135   ULONG          timeStampS1;
 136   ULONG          timeStampD1;
 137   ULONG          timeStampS2;
 138   ULONG          timeStampD2;
 139   ULONG          startingBlock;
 140   ULARGE_INTEGER size;
 141 };
 142
 143 /*************************************************************************
 144  * Big Block File support
 145  *
 146  * The big block file is an abstraction of a flat file separated in
 147  * same sized blocks. The implementation for the methods described in
 148  * this section appear in stg_bigblockfile.c
 149  */
 150
 151 /*
 152  * Declaration of the data structures
 153  */
 154 typedef struct BigBlockFile BigBlockFile,*LPBIGBLOCKFILE;
 155 typedef struct MappedPage   MappedPage,*LPMAPPEDPAGE;
 156
 157 struct BigBlockFile
 158 {
 159   BOOL fileBased;
 160   ULARGE_INTEGER filesize;
 161   ULONG blocksize;
 162   HANDLE hfile;
 163   HANDLE hfilemap;
 164   DWORD flProtect;
 165   MappedPage *maplist;
 166   MappedPage *victimhead, *victimtail;
 167   ULONG num_victim_pages;
 168   ILockBytes *pLkbyt;
 169   HGLOBAL hbytearray;
 170   LPVOID pbytearray;
 171 };
 172
 173 /*
 174  * Declaration of the functions used to manipulate the BigBlockFile
 175  * data structure.
 176  */
 177 BigBlockFile*  BIGBLOCKFILE_Construct(HANDLE hFile,
 178                                       ILockBytes* pLkByt,
 179                                       DWORD openFlags,
 180                                       ULONG blocksize,
 181                                       BOOL fileBased);
 182 void           BIGBLOCKFILE_Destructor(LPBIGBLOCKFILE This);
 183 void*          BIGBLOCKFILE_GetBigBlock(LPBIGBLOCKFILE This, ULONG index);
 184 void*          BIGBLOCKFILE_GetROBigBlock(LPBIGBLOCKFILE This, ULONG index);
 185 void           BIGBLOCKFILE_ReleaseBigBlock(LPBIGBLOCKFILE This, void *pBlock);
 186 void           BIGBLOCKFILE_SetSize(LPBIGBLOCKFILE This, ULARGE_INTEGER newSize);
 187 ULARGE_INTEGER BIGBLOCKFILE_GetSize(LPBIGBLOCKFILE This);
 188
 189 /*************************************************************************
 190  * Ole Convert support
 191  */
 192
 193 void OLECONVERT_CreateOleStream(LPSTORAGE pStorage);
 194 HRESULT OLECONVERT_CreateCompObjStream(LPSTORAGE pStorage, LPCSTR strOleTypeName);
 195
 196 /****************************************************************************
 197  * Storage32BaseImpl definitions.
 198  *
 199  * This structure defines the base information contained in all implementations
 200  * of IStorage32 contained in this file storage implementation.
 201  *
 202  * In OOP terms, this is the base class for all the IStorage32 implementations
 203  * contained in this file.
 204  */
 205 struct StorageBaseImpl
 206 {
 207   ICOM_VFIELD(IStorage);   /* Needs to be the first item in the struct
 208                             * since we want to cast this in a Storage32 pointer */
 209
 210   /*
 211    * Reference count of this object
 212    */
 213   ULONG ref;
 214
 215   /*
 216    * Ancestor storage (top level)
 217    */
 218   StorageImpl* ancestorStorage;
 219
 220   /*
 221    * Index of the property for the root of
 222    * this storage
 223    */
 224   ULONG rootPropertySetIndex;
 225
 226   /*
 227    * virtual Destructor method.
 228    */
 229   void (*v_destructor)(StorageBaseImpl*);
 230 };
 231
 232
 233 /*
 234  * Prototypes for the methods of the Storage32BaseImpl class.
 235  */
 236 HRESULT WINAPI StorageBaseImpl_QueryInterface(
 237             IStorage*        iface,
 238             REFIID             riid,
 239             void**             ppvObject);
 240
 241 ULONG WINAPI StorageBaseImpl_AddRef(
 242             IStorage*        iface);
 243
 244 ULONG WINAPI StorageBaseImpl_Release(
 245             IStorage*        iface);
 246
 247 HRESULT WINAPI StorageBaseImpl_OpenStream(
 248             IStorage*        iface,
 249             const OLECHAR*   pwcsName,  /* [string][in] */
 250             void*              reserved1, /* [unique][in] */
 251             DWORD              grfMode,   /* [in] */
 252             DWORD              reserved2, /* [in] */
 253             IStream**        ppstm);    /* [out] */
 254
 255 HRESULT WINAPI StorageBaseImpl_OpenStorage(
 256             IStorage*        iface,
 257             const OLECHAR*   pwcsName,      /* [string][unique][in] */
 258             IStorage*        pstgPriority,  /* [unique][in] */
 259             DWORD              grfMode,       /* [in] */
 260             SNB              snbExclude,    /* [unique][in] */
 261             DWORD              reserved,      /* [in] */
 262             IStorage**       ppstg);        /* [out] */
 263
 264 HRESULT WINAPI StorageBaseImpl_EnumElements(
 265             IStorage*        iface,
 266             DWORD              reserved1, /* [in] */
 267             void*              reserved2, /* [size_is][unique][in] */
 268             DWORD              reserved3, /* [in] */
 269             IEnumSTATSTG**     ppenum);   /* [out] */
 270
 271 HRESULT WINAPI StorageBaseImpl_Stat(
 272             IStorage*        iface,
 273             STATSTG*           pstatstg,     /* [out] */
 274             DWORD              grfStatFlag); /* [in] */
 275
 276 HRESULT WINAPI StorageBaseImpl_RenameElement(
 277             IStorage*        iface,
 278             const OLECHAR*   pwcsOldName,  /* [string][in] */
 279             const OLECHAR*   pwcsNewName); /* [string][in] */
 280
 281 HRESULT WINAPI StorageBaseImpl_CreateStream(
 282             IStorage*        iface,
 283             const OLECHAR*   pwcsName,  /* [string][in] */
 284             DWORD              grfMode,   /* [in] */
 285             DWORD              reserved1, /* [in] */
 286             DWORD              reserved2, /* [in] */
 287             IStream**        ppstm);    /* [out] */
 288
 289 HRESULT WINAPI StorageBaseImpl_SetClass(
 290             IStorage*        iface,
 291             REFCLSID           clsid);  /* [in] */
 292
 293 /****************************************************************************
 294  * Storage32Impl definitions.
 295  *
 296  * This implementation of the IStorage32 interface represents a root
 297  * storage. Basically, a document file.
 298  */
 299 struct StorageImpl
 300 {
 301   ICOM_VFIELD(IStorage); /* Needs to be the first item in the struct
 302                           * since we want to cast this in a Storage32 pointer */
 303
 304   /*
 305    * Declare the member of the Storage32BaseImpl class to allow
 306    * casting as a Storage32BaseImpl
 307    */
 308   ULONG                 ref;
 309   struct StorageImpl* ancestorStorage;
 310   ULONG                 rootPropertySetIndex;
 311   void (*v_destructor)(struct StorageImpl*);
 312
 313   /*
 314    * The following data members are specific to the Storage32Impl
 315    * class
 316    */
 317   HANDLE           hFile;      /* Physical support for the Docfile */
 318   LPOLESTR         pwcsName;   /* Full path of the document file */
 319
 320   /* FIXME: should this be in Storage32BaseImpl ? */
 321   WCHAR            filename[PROPERTY_NAME_BUFFER_LEN];
 322
 323   /*
 324    * File header
 325    */
 326   WORD  bigBlockSizeBits;
 327   WORD  smallBlockSizeBits;
 328   ULONG bigBlockSize;
 329   ULONG smallBlockSize;
 330   ULONG bigBlockDepotCount;
 331   ULONG rootStartBlock;
 332   ULONG smallBlockDepotStart;
 333   ULONG extBigBlockDepotStart;
 334   ULONG extBigBlockDepotCount;
 335   ULONG bigBlockDepotStart[COUNT_BBDEPOTINHEADER];
 336
 337   ULONG blockDepotCached[NUM_BLOCKS_PER_DEPOT_BLOCK];
 338   ULONG indexBlockDepotCached;
 339   ULONG prevFreeBlock;
 340
 341   /*
 342    * Abstraction of the big block chains for the chains of the header.
 343    */
 344   BlockChainStream* rootBlockChain;
 345   BlockChainStream* smallBlockDepotChain;
 346   BlockChainStream* smallBlockRootChain;
 347
 348   /*
 349    * Pointer to the big block file abstraction
 350    */
 351   BigBlockFile* bigBlockFile;
 352 };
 353
 354 /*
 355  * Method declaration for the Storage32Impl class
 356  */
 357
 358 HRESULT WINAPI StorageImpl_CreateStorage(
 359             IStorage*      iface,
 360             const OLECHAR* pwcsName,  /* [string][in] */
 361             DWORD            grfMode,   /* [in] */
 362             DWORD            dwStgFmt,  /* [in] */
 363             DWORD            reserved2, /* [in] */
 364             IStorage**     ppstg);    /* [out] */
 365
 366 HRESULT WINAPI StorageImpl_CopyTo(
 367             IStorage*      iface,
 368             DWORD          ciidExclude,  /* [in] */
 369             const IID*     rgiidExclude, /* [size_is][unique][in] */
 370             SNB            snbExclude, /* [unique][in] */
 371             IStorage*    pstgDest);    /* [unique][in] */
 372
 373 HRESULT WINAPI StorageImpl_MoveElementTo(
 374             IStorage*      iface,
 375             const OLECHAR* pwcsName,    /* [string][in] */
 376             IStorage*      pstgDest,    /* [unique][in] */
 377             const OLECHAR* pwcsNewName, /* [string][in] */
 378             DWORD            grfFlags);   /* [in] */
 379
 380 HRESULT WINAPI StorageImpl_Commit(
 381             IStorage*      iface,
 382             DWORD          grfCommitFlags); /* [in] */
 383
 384 HRESULT WINAPI StorageImpl_Revert(
 385             IStorage*      iface);
 386
 387 HRESULT WINAPI StorageImpl_DestroyElement(
 388             IStorage*      iface,
 389             const OLECHAR* pwcsName); /* [string][in] */
 390
 391 HRESULT WINAPI StorageImpl_SetElementTimes(
 392             IStorage*      iface,
 393             const OLECHAR* pwcsName, /* [string][in] */
 394             const FILETIME*  pctime,   /* [in] */
 395             const FILETIME*  patime,   /* [in] */
 396             const FILETIME*  pmtime);  /* [in] */
 397
 398 HRESULT WINAPI StorageImpl_SetStateBits(
 399             IStorage*      iface,
 400             DWORD          grfStateBits, /* [in] */
 401             DWORD          grfMask);     /* [in] */
 402
 403 HRESULT WINAPI StorageImpl_Stat(IStorage* iface,
 404                                 STATSTG*  pstatstg,     /* [out] */
 405                                 DWORD     grfStatFlag); /* [in] */
 406
 407 void StorageImpl_Destroy(
 408             StorageImpl* This);
 409
 410 HRESULT StorageImpl_Construct(
 411             StorageImpl* This,
 412             HANDLE       hFile,
 413             LPCOLESTR    pwcsName,
 414             ILockBytes*  pLkbyt,
 415             DWORD        openFlags,
 416             BOOL         fileBased,
 417             BOOL         fileCreate);
 418
 419 BOOL StorageImpl_ReadBigBlock(
 420             StorageImpl* This,
 421             ULONG          blockIndex,
 422             void*          buffer);
 423
 424 BOOL StorageImpl_WriteBigBlock(
 425             StorageImpl* This,
 426             ULONG          blockIndex,
 427             void*          buffer);
 428
 429 void* StorageImpl_GetROBigBlock(
 430             StorageImpl* This,
 431             ULONG          blockIndex);
 432
 433 void* StorageImpl_GetBigBlock(
 434             StorageImpl* This,
 435             ULONG          blockIndex);
 436
 437 void StorageImpl_ReleaseBigBlock(
 438             StorageImpl* This,
 439             void*          pBigBlock);
 440
 441 ULONG StorageImpl_GetNextFreeBigBlock(
 442             StorageImpl* This);
 443
 444 void StorageImpl_FreeBigBlock(
 445             StorageImpl* This,
 446             ULONG blockIndex);
 447
 448 HRESULT StorageImpl_GetNextBlockInChain(
 449             StorageImpl* This,
 450             ULONG blockIndex,
 451             ULONG* nextBlockIndex);
 452
 453 void StorageImpl_SetNextBlockInChain(
 454             StorageImpl* This,
 455             ULONG blockIndex,
 456             ULONG nextBlock);
 457
 458 HRESULT StorageImpl_LoadFileHeader(
 459             StorageImpl* This);
 460
 461 void StorageImpl_SaveFileHeader(
 462             StorageImpl* This);
 463
 464 BOOL StorageImpl_ReadProperty(
 465             StorageImpl* This,
 466             ULONG          index,
 467             StgProperty*    buffer);
 468
 469 BOOL StorageImpl_WriteProperty(
 470             StorageImpl* This,
 471             ULONG          index,
 472             StgProperty*   buffer);
 473
 474 BlockChainStream* Storage32Impl_SmallBlocksToBigBlocks(
 475                       StorageImpl* This,
 476                       SmallBlockChainStream** ppsbChain);
 477
 478 ULONG Storage32Impl_GetNextExtendedBlock(StorageImpl* This,
 479                                          ULONG blockIndex);
 480
 481 void Storage32Impl_AddBlockDepot(StorageImpl* This,
 482                                  ULONG blockIndex);
 483
 484 ULONG Storage32Impl_AddExtBlockDepot(StorageImpl* This);
 485
 486 ULONG Storage32Impl_GetExtDepotBlock(StorageImpl* This,
 487                                      ULONG depotIndex);
 488
 489 void Storage32Impl_SetExtDepotBlock(StorageImpl* This,
 490                                     ULONG depotIndex,
 491                                     ULONG blockIndex);
 492 /****************************************************************************
 493  * Storage32InternalImpl definitions.
 494  *
 495  * Definition of the implementation structure for the IStorage32 interface.
 496  * This one implements the IStorage32 interface for storage that are
 497  * inside another storage.
 498  */
 499 struct StorageInternalImpl
 500 {
 501   ICOM_VFIELD(IStorage);        /* Needs to be the first item in the struct
 502                                  * since we want to cast this in a Storage32 pointer */
 503
 504   /*
 505    * Declare the member of the Storage32BaseImpl class to allow
 506    * casting as a Storage32BaseImpl
 507    */
 508   ULONG                      ref;
 509   struct StorageImpl* ancestorStorage;
 510   ULONG                    rootPropertySetIndex;
 511   void (*v_destructor)(struct StorageInternalImpl*);
 512
 513   /*
 514    * There is no specific data for this class.
 515    */
 516 };
 517
 518 /*
 519  * Method definitions for the Storage32InternalImpl class.
 520  */
 521 StorageInternalImpl* StorageInternalImpl_Construct(
 522             StorageImpl* ancestorStorage,
 523             ULONG          rootTropertyIndex);
 524
 525 void StorageInternalImpl_Destroy(
 526             StorageInternalImpl* This);
 527
 528 HRESULT WINAPI StorageInternalImpl_Commit(
 529             IStorage*            iface,
 530             DWORD                  grfCommitFlags); /* [in] */
 531
 532 HRESULT WINAPI StorageInternalImpl_Revert(
 533             IStorage*            iface);
 534
 535
 536 /****************************************************************************
 537  * IEnumSTATSTGImpl definitions.
 538  *
 539  * Definition of the implementation structure for the IEnumSTATSTGImpl interface.
 540  * This class allows iterating through the content of a storage and to find
 541  * specific items inside it.
 542  */
 543 struct IEnumSTATSTGImpl
 544 {
 545   ICOM_VFIELD(IEnumSTATSTG);    /* Needs to be the first item in the struct
 546                                          * since we want to cast this in a IEnumSTATSTG pointer */
 547
 548   ULONG          ref;                   /* Reference count */
 549   StorageImpl* parentStorage;         /* Reference to the parent storage */
 550   ULONG          firstPropertyNode;     /* Index of the root of the storage to enumerate */
 551
 552   /*
 553    * The current implementation of the IEnumSTATSTGImpl class uses a stack
 554    * to walk the property sets to get the content of a storage. This stack
 555    * is implemented by the following 3 data members
 556    */
 557   ULONG          stackSize;
 558   ULONG          stackMaxSize;
 559   ULONG*         stackToVisit;
 560
 561 #define ENUMSTATSGT_SIZE_INCREMENT 10
 562 };
 563
 564 /*
 565  * Method definitions for the IEnumSTATSTGImpl class.
 566  */
 567 HRESULT WINAPI IEnumSTATSTGImpl_QueryInterface(
 568             IEnumSTATSTG*     iface,
 569             REFIID            riid,
 570             void**            ppvObject);
 571
 572 ULONG WINAPI IEnumSTATSTGImpl_AddRef(
 573             IEnumSTATSTG*     iface);
 574
 575 ULONG WINAPI IEnumSTATSTGImpl_Release(
 576             IEnumSTATSTG*     iface);
 577
 578 HRESULT WINAPI IEnumSTATSTGImpl_Next(
 579             IEnumSTATSTG*     iface,
 580             ULONG             celt,
 581             STATSTG*          rgelt,
 582             ULONG*            pceltFetched);
 583
 584 HRESULT WINAPI IEnumSTATSTGImpl_Skip(
 585             IEnumSTATSTG*     iface,
 586             ULONG             celt);
 587
 588 HRESULT WINAPI IEnumSTATSTGImpl_Reset(
 589             IEnumSTATSTG* iface);
 590
 591 HRESULT WINAPI IEnumSTATSTGImpl_Clone(
 592             IEnumSTATSTG*     iface,
 593             IEnumSTATSTG**    ppenum);
 594
 595 IEnumSTATSTGImpl* IEnumSTATSTGImpl_Construct(
 596             StorageImpl* This,
 597             ULONG          firstPropertyNode);
 598
 599 void IEnumSTATSTGImpl_Destroy(
 600             IEnumSTATSTGImpl* This);
 601
 602 void IEnumSTATSTGImpl_PushSearchNode(
 603             IEnumSTATSTGImpl* This,
 604             ULONG             nodeToPush);
 605
 606 ULONG IEnumSTATSTGImpl_PopSearchNode(
 607             IEnumSTATSTGImpl* This,
 608             BOOL            remove);
 609
 610 ULONG IEnumSTATSTGImpl_FindProperty(
 611             IEnumSTATSTGImpl* This,
 612             const OLECHAR*  lpszPropName,
 613             StgProperty*      buffer);
 614
 615 INT IEnumSTATSTGImpl_FindParentProperty(
 616   IEnumSTATSTGImpl *This,
 617   ULONG             childProperty,
 618   StgProperty      *currentProperty,
 619   ULONG            *propertyId);
 620
 621
 622 /****************************************************************************
 623  * StgStreamImpl definitions.
 624  *
 625  * This class imlements the IStream32 inteface and represents a stream
 626  * located inside a storage object.
 627  */
 628 struct StgStreamImpl
 629 {
 630   ICOM_VFIELD(IStream);  /* Needs to be the first item in the struct
 631                                     * since we want to cast this in a IStream pointer */
 632
 633   /*
 634    * Reference count
 635    */
 636   ULONG              ref;
 637
 638   /*
 639    * Storage that is the parent(owner) of the stream
 640    */
 641   StorageBaseImpl* parentStorage;
 642
 643   /*
 644    * Access mode of this stream.
 645    */
 646   DWORD grfMode;
 647
 648   /*
 649    * Index of the property that owns (points to) this stream.
 650    */
 651   ULONG              ownerProperty;
 652
 653   /*
 654    * Helper variable that contains the size of the stream
 655    */
 656   ULARGE_INTEGER     streamSize;
 657
 658   /*
 659    * This is the current position of the cursor in the stream
 660    */
 661   ULARGE_INTEGER     currentPosition;
 662
 663   /*
 664    * The information in the stream is represented by a chain of small blocks
 665    * or a chain of large blocks. Depending on the case, one of the two
 666    * following variabled points to that information.
 667    */
 668   BlockChainStream*      bigBlockChain;
 669   SmallBlockChainStream* smallBlockChain;
 670 };
 671
 672 /*
 673  * Method definition for the StgStreamImpl class.
 674  */
 675 StgStreamImpl* StgStreamImpl_Construct(
 676                 StorageBaseImpl* parentStorage,
 677     DWORD            grfMode,
 678     ULONG            ownerProperty);
 679
 680 void StgStreamImpl_Destroy(
 681                 StgStreamImpl* This);
 682
 683 void StgStreamImpl_OpenBlockChain(
 684                 StgStreamImpl* This);
 685
 686 HRESULT WINAPI StgStreamImpl_QueryInterface(
 687                 IStream*      iface,
 688                 REFIID         riid,            /* [in] */
 689                 void**         ppvObject);  /* [iid_is][out] */
 690
 691 ULONG WINAPI StgStreamImpl_AddRef(
 692                 IStream*      iface);
 693
 694 ULONG WINAPI StgStreamImpl_Release(
 695                 IStream*      iface);
 696
 697 HRESULT WINAPI StgStreamImpl_Read(
 698                 IStream*      iface,
 699                 void*          pv,        /* [length_is][size_is][out] */
 700                 ULONG          cb,        /* [in] */
 701                 ULONG*         pcbRead);  /* [out] */
 702
 703 HRESULT WINAPI StgStreamImpl_Write(
 704                 IStream*      iface,
 705                 const void*    pv,          /* [size_is][in] */
 706                 ULONG          cb,          /* [in] */
 707                 ULONG*         pcbWritten); /* [out] */
 708
 709 HRESULT WINAPI StgStreamImpl_Seek(
 710                 IStream*      iface,
 711                 LARGE_INTEGER   dlibMove,         /* [in] */
 712                 DWORD           dwOrigin,         /* [in] */
 713                 ULARGE_INTEGER* plibNewPosition); /* [out] */
 714
 715 HRESULT WINAPI StgStreamImpl_SetSize(
 716                 IStream*      iface,
 717                 ULARGE_INTEGER  libNewSize);  /* [in] */
 718
 719 HRESULT WINAPI StgStreamImpl_CopyTo(
 720                 IStream*      iface,
 721                 IStream*      pstm,         /* [unique][in] */
 722                 ULARGE_INTEGER  cb,           /* [in] */
 723                 ULARGE_INTEGER* pcbRead,      /* [out] */
 724                 ULARGE_INTEGER* pcbWritten);  /* [out] */
 725
 726 HRESULT WINAPI StgStreamImpl_Commit(
 727                 IStream*      iface,
 728                 DWORD           grfCommitFlags); /* [in] */
 729
 730 HRESULT WINAPI StgStreamImpl_Revert(
 731                 IStream*  iface);
 732
 733 HRESULT WINAPI StgStreamImpl_LockRegion(
 734                 IStream*     iface,
 735                 ULARGE_INTEGER libOffset,   /* [in] */
 736                 ULARGE_INTEGER cb,          /* [in] */
 737                 DWORD          dwLockType); /* [in] */
 738
 739 HRESULT WINAPI StgStreamImpl_UnlockRegion(
 740                 IStream*     iface,
 741                 ULARGE_INTEGER libOffset,   /* [in] */
 742                 ULARGE_INTEGER cb,          /* [in] */
 743                 DWORD          dwLockType); /* [in] */
 744
 745 HRESULT WINAPI StgStreamImpl_Stat(
 746                 IStream*     iface,
 747                 STATSTG*       pstatstg,     /* [out] */
 748                 DWORD          grfStatFlag); /* [in] */
 749
 750 HRESULT WINAPI StgStreamImpl_Clone(
 751                 IStream*     iface,
 752                 IStream**    ppstm);       /* [out] */
 753
 754
 755 /********************************************************************************
 756  * The StorageUtl_ functions are miscelaneous utility functions. Most of which are
 757  * abstractions used to read values from file buffers without having to worry
 758  * about bit order
 759  */
 760 void StorageUtl_ReadWord(void* buffer, ULONG offset, WORD* value);
 761 void StorageUtl_WriteWord(void* buffer, ULONG offset, WORD value);
 762 void StorageUtl_ReadDWord(void* buffer, ULONG offset, DWORD* value);
 763 void StorageUtl_WriteDWord(void* buffer, ULONG offset, DWORD value);
 764 void StorageUtl_ReadGUID(void* buffer, ULONG offset, GUID* value);
 765 void StorageUtl_WriteGUID(void* buffer, ULONG offset, GUID* value);
 766 void StorageUtl_CopyPropertyToSTATSTG(STATSTG*     destination,
 767                                              StgProperty* source,
 768                                              int          statFlags);
 769
 770 /****************************************************************************
 771  * BlockChainStream definitions.
 772  *
 773  * The BlockChainStream class is a utility class that is used to create an
 774  * abstraction of the big block chains in the storage file.
 775  */
 776 struct BlockChainStream
 777 {
 778   StorageImpl* parentStorage;
 779   ULONG*       headOfStreamPlaceHolder;
 780   ULONG        ownerPropertyIndex;
 781   ULONG        lastBlockNoInSequence;
 782   ULONG        lastBlockNoInSequenceIndex;
 783   ULONG        tailIndex;
 784   ULONG        numBlocks;
 785 };
 786
 787 /*
 788  * Methods for the BlockChainStream class.
 789  */
 790 BlockChainStream* BlockChainStream_Construct(
 791                 StorageImpl* parentStorage,
 792                 ULONG*         headOfStreamPlaceHolder,
 793                 ULONG          propertyIndex);
 794
 795 void BlockChainStream_Destroy(
 796                 BlockChainStream* This);
 797
 798 ULONG BlockChainStream_GetHeadOfChain(
 799                 BlockChainStream* This);
 800
 801 BOOL BlockChainStream_ReadAt(
 802                 BlockChainStream* This,
 803                 ULARGE_INTEGER offset,
 804                 ULONG          size,
 805                 void*          buffer,
 806                 ULONG*         bytesRead);
 807
 808 BOOL BlockChainStream_WriteAt(
 809                 BlockChainStream* This,
 810                 ULARGE_INTEGER offset,
 811                 ULONG          size,
 812                 const void*    buffer,
 813                 ULONG*         bytesWritten);
 814
 815 BOOL BlockChainStream_SetSize(
 816                 BlockChainStream* This,
 817                 ULARGE_INTEGER    newSize);
 818
 819 ULARGE_INTEGER BlockChainStream_GetSize(
 820     BlockChainStream* This);
 821
 822 ULONG BlockChainStream_GetCount(
 823     BlockChainStream* This);
 824
 825 /****************************************************************************
 826  * SmallBlockChainStream definitions.
 827  *
 828  * The SmallBlockChainStream class is a utility class that is used to create an
 829  * abstraction of the small block chains in the storage file.
 830  */
 831 struct SmallBlockChainStream
 832 {
 833   StorageImpl* parentStorage;
 834   ULONG          ownerPropertyIndex;
 835 };
 836
 837 /*
 838  * Methods of the SmallBlockChainStream class.
 839  */
 840 SmallBlockChainStream* SmallBlockChainStream_Construct(
 841                StorageImpl* parentStorage,
 842                ULONG          propertyIndex);
 843
 844 void SmallBlockChainStream_Destroy(
 845                SmallBlockChainStream* This);
 846
 847 ULONG SmallBlockChainStream_GetHeadOfChain(
 848                SmallBlockChainStream* This);
 849
 850 HRESULT SmallBlockChainStream_GetNextBlockInChain(
 851                SmallBlockChainStream* This,
 852                ULONG                  blockIndex,
 853                ULONG*                 nextBlockIndex);
 854
 855 void SmallBlockChainStream_SetNextBlockInChain(
 856          SmallBlockChainStream* This,
 857          ULONG                  blockIndex,
 858          ULONG                  nextBlock);
 859
 860 void SmallBlockChainStream_FreeBlock(
 861          SmallBlockChainStream* This,
 862          ULONG                  blockIndex);
 863
 864 ULONG SmallBlockChainStream_GetNextFreeBlock(
 865          SmallBlockChainStream* This);
 866
 867 BOOL SmallBlockChainStream_ReadAt(
 868                SmallBlockChainStream* This,
 869                ULARGE_INTEGER offset,
 870                ULONG          size,
 871                void*          buffer,
 872                ULONG*         bytesRead);
 873
 874 BOOL SmallBlockChainStream_WriteAt(
 875                SmallBlockChainStream* This,
 876                ULARGE_INTEGER offset,
 877                ULONG          size,
 878                const void*    buffer,
 879                ULONG*         bytesWritten);
 880
 881 BOOL SmallBlockChainStream_SetSize(
 882                SmallBlockChainStream* This,
 883                ULARGE_INTEGER          newSize);
 884
 885 ULARGE_INTEGER SmallBlockChainStream_GetSize(
 886          SmallBlockChainStream* This);
 887
 888 ULONG SmallBlockChainStream_GetCount(
 889          SmallBlockChainStream* This);
 890
 891
 892 #endif /* __STORAGE32_H__ */