dlls/itss/storage.c

   1 /*
   2  *    ITSS Storage implementation
   3  *
   4  * Copyright 2004 Mike McCormack
   5  *
   6  *  see http://bonedaddy.net/pabs3/hhm/#chmspec
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 #include "config.h"
  24
  25 #include <stdarg.h>
  26 #include <stdio.h>
  27
  28 #define COBJMACROS
  29
  30 #include "windef.h"
  31 #include "winbase.h"
  32 #include "winuser.h"
  33 #include "ole2.h"
  34
  35 #include "chm_lib.h"
  36 #include "itsstor.h"
  37
  38 #include "wine/itss.h"
  39 #include "wine/unicode.h"
  40 #include "wine/debug.h"
  41
  42 WINE_DEFAULT_DEBUG_CHANNEL(itss);
  43
  44 /************************************************************************/
  45
  46 typedef struct _ITSS_IStorageImpl
  47 {
  48     const IStorageVtbl *vtbl_IStorage;
  49     LONG ref;
  50     struct chmFile *chmfile;
  51     WCHAR dir[1];
  52 } ITSS_IStorageImpl;
  53
  54 struct enum_info
  55 {
  56     struct enum_info *next, *prev;
  57     struct chmUnitInfo ui;
  58 };
  59
  60 typedef struct _IEnumSTATSTG_Impl
  61 {
  62     const IEnumSTATSTGVtbl *vtbl_IEnumSTATSTG;
  63     LONG ref;
  64     struct enum_info *first, *last, *current;
  65 } IEnumSTATSTG_Impl;
  66
  67 typedef struct _IStream_Impl
  68 {
  69     const IStreamVtbl *vtbl_IStream;
  70     LONG ref;
  71     ITSS_IStorageImpl *stg;
  72     ULONGLONG addr;
  73     struct chmUnitInfo ui;
  74 } IStream_Impl;
  75
  76 static HRESULT ITSS_create_chm_storage(
  77            struct chmFile *chmfile, const WCHAR *dir, IStorage** ppstgOpen );
  78 static IStream_Impl* ITSS_create_stream(
  79            ITSS_IStorageImpl *stg, struct chmUnitInfo *ui );
  80
  81 /************************************************************************/
  82
  83 static HRESULT WINAPI ITSS_IEnumSTATSTG_QueryInterface(
  84     IEnumSTATSTG* iface,
  85     REFIID riid,
  86     void** ppvObject)
  87 {
  88     IEnumSTATSTG_Impl *This = (IEnumSTATSTG_Impl *)iface;
  89
  90     if (IsEqualGUID(riid, &IID_IUnknown)
  91         || IsEqualGUID(riid, &IID_IEnumSTATSTG))
  92     {
  93         IEnumSTATSTG_AddRef(iface);
  94         *ppvObject = This;
  95         return S_OK;
  96     }
  97
  98     WARN("(%p)->(%s,%p),not found\n",This,debugstr_guid(riid),ppvObject);
  99     return E_NOINTERFACE;
 100 }
 101
 102 static ULONG WINAPI ITSS_IEnumSTATSTG_AddRef(
 103     IEnumSTATSTG* iface)
 104 {
 105     IEnumSTATSTG_Impl *This = (IEnumSTATSTG_Impl *)iface;
 106     return InterlockedIncrement(&This->ref);
 107 }
 108
 109 static ULONG WINAPI ITSS_IEnumSTATSTG_Release(
 110     IEnumSTATSTG* iface)
 111 {
 112     IEnumSTATSTG_Impl *This = (IEnumSTATSTG_Impl *)iface;
 113
 114     ULONG ref = InterlockedDecrement(&This->ref);
 115
 116     if (ref == 0)
 117     {
 118         while( This->first )
 119         {
 120             struct enum_info *t = This->first->next;
 121             HeapFree( GetProcessHeap(), 0, This->first );
 122             This->first = t;
 123         }
 124         HeapFree(GetProcessHeap(), 0, This);
 125         ITSS_UnlockModule();
 126     }
 127
 128     return ref;
 129 }
 130
 131 static HRESULT WINAPI ITSS_IEnumSTATSTG_Next(
 132         IEnumSTATSTG* iface,
 133         ULONG celt,
 134         STATSTG* rgelt,
 135         ULONG* pceltFetched)
 136 {
 137     IEnumSTATSTG_Impl *This = (IEnumSTATSTG_Impl *)iface;
 138     DWORD len, n;
 139     struct enum_info *cur;
 140
 141     TRACE("%p %u %p %p\n", This, celt, rgelt, pceltFetched );
 142
 143     cur = This->current;
 144     n = 0;
 145     while( (n<celt) && cur)
 146     {
 147         WCHAR *str;
 148
 149         memset( rgelt, 0, sizeof *rgelt );
 150
 151         /* copy the name */
 152         str = cur->ui.path;
 153         if( *str == '/' )
 154             str++;
 155         len = strlenW( str ) + 1;
 156         rgelt->pwcsName = CoTaskMemAlloc( len*sizeof(WCHAR) );
 157         strcpyW( rgelt->pwcsName, str );
 158
 159         /* determine the type */
 160         if( rgelt->pwcsName[len-2] == '/' )
 161         {
 162             rgelt->pwcsName[len-2] = 0;
 163             rgelt->type = STGTY_STORAGE;
 164         }
 165         else
 166             rgelt->type = STGTY_STREAM;
 167
 168         /* copy the size */
 169         rgelt->cbSize.QuadPart = cur->ui.length;
 170
 171         /* advance to the next item if it exists */
 172         n++;
 173         cur = cur->next;
 174     }
 175
 176     This->current = cur;
 177     *pceltFetched = n;
 178
 179     if( n < celt )
 180         return S_FALSE;
 181
 182     return S_OK;
 183 }
 184
 185 static HRESULT WINAPI ITSS_IEnumSTATSTG_Skip(
 186         IEnumSTATSTG* iface,
 187         ULONG celt)
 188 {
 189     IEnumSTATSTG_Impl *This = (IEnumSTATSTG_Impl *)iface;
 190     DWORD n;
 191     struct enum_info *cur;
 192
 193     TRACE("%p %u\n", This, celt );
 194
 195     cur = This->current;
 196     n = 0;
 197     while( (n<celt) && cur)
 198     {
 199         n++;
 200         cur = cur->next;
 201     }
 202     This->current = cur;
 203
 204     if( n < celt )
 205         return S_FALSE;
 206
 207     return S_OK;
 208 }
 209
 210 static HRESULT WINAPI ITSS_IEnumSTATSTG_Reset(
 211         IEnumSTATSTG* iface)
 212 {
 213     IEnumSTATSTG_Impl *This = (IEnumSTATSTG_Impl *)iface;
 214
 215     TRACE("%p\n", This );
 216
 217     This->current = This->first;
 218
 219     return S_OK;
 220 }
 221
 222 static HRESULT WINAPI ITSS_IEnumSTATSTG_Clone(
 223         IEnumSTATSTG* iface,
 224         IEnumSTATSTG** ppenum)
 225 {
 226     FIXME("\n");
 227     return E_NOTIMPL;
 228 }
 229
 230 static const IEnumSTATSTGVtbl IEnumSTATSTG_vtbl =
 231 {
 232     ITSS_IEnumSTATSTG_QueryInterface,
 233     ITSS_IEnumSTATSTG_AddRef,
 234     ITSS_IEnumSTATSTG_Release,
 235     ITSS_IEnumSTATSTG_Next,
 236     ITSS_IEnumSTATSTG_Skip,
 237     ITSS_IEnumSTATSTG_Reset,
 238     ITSS_IEnumSTATSTG_Clone
 239 };
 240
 241 static IEnumSTATSTG_Impl *ITSS_create_enum( void )
 242 {
 243     IEnumSTATSTG_Impl *stgenum;
 244
 245     stgenum = HeapAlloc( GetProcessHeap(), 0, sizeof (IEnumSTATSTG_Impl) );
 246     stgenum->vtbl_IEnumSTATSTG = &IEnumSTATSTG_vtbl;
 247     stgenum->ref = 1;
 248     stgenum->first = NULL;
 249     stgenum->last = NULL;
 250     stgenum->current = NULL;
 251
 252     ITSS_LockModule();
 253     TRACE(" -> %p\n", stgenum );
 254
 255     return stgenum;
 256 }
 257
 258 /************************************************************************/
 259
 260 static HRESULT WINAPI ITSS_IStorageImpl_QueryInterface(
 261     IStorage* iface,
 262     REFIID riid,
 263     void** ppvObject)
 264 {
 265     ITSS_IStorageImpl *This = (ITSS_IStorageImpl *)iface;
 266
 267     if (IsEqualGUID(riid, &IID_IUnknown)
 268         || IsEqualGUID(riid, &IID_IStorage))
 269     {
 270         IStorage_AddRef(iface);
 271         *ppvObject = This;
 272         return S_OK;
 273     }
 274
 275     WARN("(%p)->(%s,%p),not found\n",This,debugstr_guid(riid),ppvObject);
 276     return E_NOINTERFACE;
 277 }
 278
 279 static ULONG WINAPI ITSS_IStorageImpl_AddRef(
 280     IStorage* iface)
 281 {
 282     ITSS_IStorageImpl *This = (ITSS_IStorageImpl *)iface;
 283     return InterlockedIncrement(&This->ref);
 284 }
 285
 286 static ULONG WINAPI ITSS_IStorageImpl_Release(
 287     IStorage* iface)
 288 {
 289     ITSS_IStorageImpl *This = (ITSS_IStorageImpl *)iface;
 290
 291     ULONG ref = InterlockedDecrement(&This->ref);
 292
 293     if (ref == 0)
 294     {
 295         chm_close(This->chmfile);
 296         HeapFree(GetProcessHeap(), 0, This);
 297         ITSS_UnlockModule();
 298     }
 299
 300     return ref;
 301 }
 302
 303 static HRESULT WINAPI ITSS_IStorageImpl_CreateStream(
 304     IStorage* iface,
 305     LPCOLESTR pwcsName,
 306     DWORD grfMode,
 307     DWORD reserved1,
 308     DWORD reserved2,
 309     IStream** ppstm)
 310 {
 311     FIXME("\n");
 312     return E_NOTIMPL;
 313 }
 314
 315 static HRESULT WINAPI ITSS_IStorageImpl_OpenStream(
 316     IStorage* iface,
 317     LPCOLESTR pwcsName,
 318     void* reserved1,
 319     DWORD grfMode,
 320     DWORD reserved2,
 321     IStream** ppstm)
 322 {
 323     ITSS_IStorageImpl *This = (ITSS_IStorageImpl *)iface;
 324     IStream_Impl *stm;
 325     DWORD len;
 326     struct chmUnitInfo ui;
 327     int r;
 328     WCHAR *path, *p;
 329
 330     TRACE("%p %s %p %u %u %p\n", This, debugstr_w(pwcsName),
 331           reserved1, grfMode, reserved2, ppstm );
 332
 333     len = strlenW( This->dir ) + strlenW( pwcsName ) + 1;
 334     path = HeapAlloc( GetProcessHeap(), 0, len*sizeof(WCHAR) );
 335     strcpyW( path, This->dir );
 336
 337     if( pwcsName[0] == '/' || pwcsName[0] == '\\' )
 338     {
 339         p = &path[strlenW( path ) - 1];
 340         while( ( path <= p ) && ( *p == '/' ) )
 341             *p-- = 0;
 342     }
 343     strcatW( path, pwcsName );
 344
 345     for(p=path; *p; p++) {
 346         if(*p == '\\')
 347             *p = '/';
 348     }
 349
 350     if(*--p == '/')
 351         *p = 0;
 352
 353     TRACE("Resolving %s\n", debugstr_w(path));
 354
 355     r = chm_resolve_object(This->chmfile, path, &ui);
 356     HeapFree( GetProcessHeap(), 0, path );
 357
 358     if( r != CHM_RESOLVE_SUCCESS ) {
 359         WARN("Could not resolve object\n");
 360         return STG_E_FILENOTFOUND;
 361     }
 362
 363     stm = ITSS_create_stream( This, &ui );
 364     if( !stm )
 365         return E_FAIL;
 366
 367     *ppstm = (IStream*) stm;
 368
 369     return S_OK;
 370 }
 371
 372 static HRESULT WINAPI ITSS_IStorageImpl_CreateStorage(
 373     IStorage* iface,
 374     LPCOLESTR pwcsName,
 375     DWORD grfMode,
 376     DWORD dwStgFmt,
 377     DWORD reserved2,
 378     IStorage** ppstg)
 379 {
 380     FIXME("\n");
 381     return E_NOTIMPL;
 382 }
 383
 384 static HRESULT WINAPI ITSS_IStorageImpl_OpenStorage(
 385     IStorage* iface,
 386     LPCOLESTR pwcsName,
 387     IStorage* pstgPriority,
 388     DWORD grfMode,
 389     SNB snbExclude,
 390     DWORD reserved,
 391     IStorage** ppstg)
 392 {
 393     ITSS_IStorageImpl *This = (ITSS_IStorageImpl *)iface;
 394
 395     FIXME("%p %s %p %u %p %u %p\n", This, debugstr_w(pwcsName),
 396           pstgPriority, grfMode, snbExclude, reserved, ppstg);
 397     return E_NOTIMPL;
 398 }
 399
 400 static HRESULT WINAPI ITSS_IStorageImpl_CopyTo(
 401     IStorage* iface,
 402     DWORD ciidExclude,
 403     const IID* rgiidExclude,
 404     SNB snbExclude,
 405     IStorage* pstgDest)
 406 {
 407     FIXME("\n");
 408     return E_NOTIMPL;
 409 }
 410
 411 static HRESULT WINAPI ITSS_IStorageImpl_MoveElementTo(
 412     IStorage* iface,
 413     LPCOLESTR pwcsName,
 414     IStorage* pstgDest,
 415     LPCOLESTR pwcsNewName,
 416     DWORD grfFlags)
 417 {
 418     FIXME("\n");
 419     return E_NOTIMPL;
 420 }
 421
 422 static HRESULT WINAPI ITSS_IStorageImpl_Commit(
 423     IStorage* iface,
 424     DWORD grfCommitFlags)
 425 {
 426     FIXME("\n");
 427     return E_NOTIMPL;
 428 }
 429
 430 static HRESULT WINAPI ITSS_IStorageImpl_Revert(
 431     IStorage* iface)
 432 {
 433     FIXME("\n");
 434     return E_NOTIMPL;
 435 }
 436
 437 static int ITSS_chm_enumerator(
 438     struct chmFile *h,
 439     struct chmUnitInfo *ui,
 440     void *context)
 441 {
 442     struct enum_info *info;
 443     IEnumSTATSTG_Impl* stgenum = context;
 444
 445     TRACE("adding %s to enumeration\n", debugstr_w(ui->path) );
 446
 447     info = HeapAlloc( GetProcessHeap(), 0, sizeof (struct enum_info) );
 448     info->ui = *ui;
 449
 450     info->next = NULL;
 451     info->prev = stgenum->last;
 452     if( stgenum->last )
 453         stgenum->last->next = info;
 454     else
 455         stgenum->first = info;
 456     stgenum->last = info;
 457
 458     return CHM_ENUMERATOR_CONTINUE;
 459 }
 460
 461 static HRESULT WINAPI ITSS_IStorageImpl_EnumElements(
 462     IStorage* iface,
 463     DWORD reserved1,
 464     void* reserved2,
 465     DWORD reserved3,
 466     IEnumSTATSTG** ppenum)
 467 {
 468     ITSS_IStorageImpl *This = (ITSS_IStorageImpl *)iface;
 469     IEnumSTATSTG_Impl* stgenum;
 470
 471     TRACE("%p %d %p %d %p\n", This, reserved1, reserved2, reserved3, ppenum );
 472
 473     stgenum = ITSS_create_enum();
 474     if( !stgenum )
 475         return E_FAIL;
 476
 477     chm_enumerate_dir(This->chmfile,
 478                   This->dir,
 479                   CHM_ENUMERATE_ALL,
 480                   ITSS_chm_enumerator,
 481                   stgenum );
 482
 483     stgenum->current = stgenum->first;
 484
 485     *ppenum = (IEnumSTATSTG*) stgenum;
 486
 487     return S_OK;
 488 }
 489
 490 static HRESULT WINAPI ITSS_IStorageImpl_DestroyElement(
 491     IStorage* iface,
 492     LPCOLESTR pwcsName)
 493 {
 494     FIXME("\n");
 495     return E_NOTIMPL;
 496 }
 497
 498 static HRESULT WINAPI ITSS_IStorageImpl_RenameElement(
 499     IStorage* iface,
 500     LPCOLESTR pwcsOldName,
 501     LPCOLESTR pwcsNewName)
 502 {
 503     FIXME("\n");
 504     return E_NOTIMPL;
 505 }
 506
 507 static HRESULT WINAPI ITSS_IStorageImpl_SetElementTimes(
 508     IStorage* iface,
 509     LPCOLESTR pwcsName,
 510     const FILETIME* pctime,
 511     const FILETIME* patime,
 512     const FILETIME* pmtime)
 513 {
 514     FIXME("\n");
 515     return E_NOTIMPL;
 516 }
 517
 518 static HRESULT WINAPI ITSS_IStorageImpl_SetClass(
 519     IStorage* iface,
 520     REFCLSID clsid)
 521 {
 522     FIXME("\n");
 523     return E_NOTIMPL;
 524 }
 525
 526 static HRESULT WINAPI ITSS_IStorageImpl_SetStateBits(
 527     IStorage* iface,
 528     DWORD grfStateBits,
 529     DWORD grfMask)
 530 {
 531     FIXME("\n");
 532     return E_NOTIMPL;
 533 }
 534
 535 static HRESULT WINAPI ITSS_IStorageImpl_Stat(
 536     IStorage* iface,
 537     STATSTG* pstatstg,
 538     DWORD grfStatFlag)
 539 {
 540     FIXME("\n");
 541     return E_NOTIMPL;
 542 }
 543
 544 static const IStorageVtbl ITSS_IStorageImpl_Vtbl =
 545 {
 546     ITSS_IStorageImpl_QueryInterface,
 547     ITSS_IStorageImpl_AddRef,
 548     ITSS_IStorageImpl_Release,
 549     ITSS_IStorageImpl_CreateStream,
 550     ITSS_IStorageImpl_OpenStream,
 551     ITSS_IStorageImpl_CreateStorage,
 552     ITSS_IStorageImpl_OpenStorage,
 553     ITSS_IStorageImpl_CopyTo,
 554     ITSS_IStorageImpl_MoveElementTo,
 555     ITSS_IStorageImpl_Commit,
 556     ITSS_IStorageImpl_Revert,
 557     ITSS_IStorageImpl_EnumElements,
 558     ITSS_IStorageImpl_DestroyElement,
 559     ITSS_IStorageImpl_RenameElement,
 560     ITSS_IStorageImpl_SetElementTimes,
 561     ITSS_IStorageImpl_SetClass,
 562     ITSS_IStorageImpl_SetStateBits,
 563     ITSS_IStorageImpl_Stat,
 564 };
 565
 566 static HRESULT ITSS_create_chm_storage(
 567       struct chmFile *chmfile, const WCHAR *dir, IStorage** ppstgOpen )
 568 {
 569     ITSS_IStorageImpl *stg;
 570     DWORD len;
 571
 572     TRACE("%p %s\n", chmfile, debugstr_w( dir ) );
 573
 574     len = strlenW( dir ) + 1;
 575     stg = HeapAlloc( GetProcessHeap(), 0,
 576                      sizeof (ITSS_IStorageImpl) + len*sizeof(WCHAR) );
 577     stg->vtbl_IStorage = &ITSS_IStorageImpl_Vtbl;
 578     stg->ref = 1;
 579     stg->chmfile = chmfile;
 580     strcpyW( stg->dir, dir );
 581
 582     *ppstgOpen = (IStorage*) stg;
 583
 584     ITSS_LockModule();
 585     return S_OK;
 586 }
 587
 588 HRESULT ITSS_StgOpenStorage(
 589     const WCHAR* pwcsName,
 590     IStorage* pstgPriority,
 591     DWORD grfMode,
 592     SNB snbExclude,
 593     DWORD reserved,
 594     IStorage** ppstgOpen)
 595 {
 596     struct chmFile *chmfile;
 597     static const WCHAR szRoot[] = { '/', 0 };
 598
 599     TRACE("%s\n", debugstr_w(pwcsName) );
 600
 601     chmfile = chm_openW( pwcsName );
 602     if( !chmfile )
 603         return E_FAIL;
 604
 605     return ITSS_create_chm_storage( chmfile, szRoot, ppstgOpen );
 606 }
 607
 608 /************************************************************************/
 609
 610 static HRESULT WINAPI ITSS_IStream_QueryInterface(
 611     IStream* iface,
 612     REFIID riid,
 613     void** ppvObject)
 614 {
 615     IStream_Impl *This = (IStream_Impl *)iface;
 616
 617     if (IsEqualGUID(riid, &IID_IUnknown)
 618         || IsEqualGUID(riid, &IID_ISequentialStream)
 619         || IsEqualGUID(riid, &IID_IStream))
 620     {
 621         IStream_AddRef(iface);
 622         *ppvObject = This;
 623         return S_OK;
 624     }
 625
 626     WARN("(%p)->(%s,%p),not found\n",This,debugstr_guid(riid),ppvObject);
 627     return E_NOINTERFACE;
 628 }
 629
 630 static ULONG WINAPI ITSS_IStream_AddRef(
 631     IStream* iface)
 632 {
 633     IStream_Impl *This = (IStream_Impl *)iface;
 634     return InterlockedIncrement(&This->ref);
 635 }
 636
 637 static ULONG WINAPI ITSS_IStream_Release(
 638     IStream* iface)
 639 {
 640     IStream_Impl *This = (IStream_Impl *)iface;
 641
 642     ULONG ref = InterlockedDecrement(&This->ref);
 643
 644     if (ref == 0)
 645     {
 646         IStorage_Release( (IStorage*) This->stg );
 647         HeapFree(GetProcessHeap(), 0, This);
 648         ITSS_UnlockModule();
 649     }
 650
 651     return ref;
 652 }
 653
 654 static HRESULT WINAPI ITSS_IStream_Read(
 655         IStream* iface,
 656         void* pv,
 657         ULONG cb,
 658         ULONG* pcbRead)
 659 {
 660     IStream_Impl *This = (IStream_Impl *)iface;
 661     ULONG count;
 662
 663     TRACE("%p %p %u %p\n", This, pv, cb, pcbRead);
 664
 665     count = chm_retrieve_object(This->stg->chmfile,
 666                           &This->ui, pv, This->addr, cb);
 667     This->addr += count;
 668     if( pcbRead )
 669         *pcbRead = count;
 670
 671     return count ? S_OK : S_FALSE;
 672 }
 673
 674 static HRESULT WINAPI ITSS_IStream_Write(
 675         IStream* iface,
 676         const void* pv,
 677         ULONG cb,
 678         ULONG* pcbWritten)
 679 {
 680     FIXME("\n");
 681     return E_NOTIMPL;
 682 }
 683
 684 static HRESULT WINAPI ITSS_IStream_Seek(
 685         IStream* iface,
 686         LARGE_INTEGER dlibMove,
 687         DWORD dwOrigin,
 688         ULARGE_INTEGER* plibNewPosition)
 689 {
 690     IStream_Impl *This = (IStream_Impl *)iface;
 691     LONGLONG newpos;
 692
 693     TRACE("%p %s %u %p\n", This,
 694           wine_dbgstr_longlong( dlibMove.QuadPart ), dwOrigin, plibNewPosition );
 695
 696     newpos = This->addr;
 697     switch( dwOrigin )
 698     {
 699     case STREAM_SEEK_CUR:
 700         newpos = This->addr + dlibMove.QuadPart;
 701         break;
 702     case STREAM_SEEK_SET:
 703         newpos = dlibMove.QuadPart;
 704         break;
 705     case STREAM_SEEK_END:
 706         newpos = This->ui.length + dlibMove.QuadPart;
 707         break;
 708     }
 709
 710     if( ( newpos < 0 ) || ( newpos > This->ui.length ) )
 711         return STG_E_INVALIDPOINTER;
 712
 713     This->addr = newpos;
 714     if( plibNewPosition )
 715         plibNewPosition->QuadPart = This->addr;
 716
 717     return S_OK;
 718 }
 719
 720 static HRESULT WINAPI ITSS_IStream_SetSize(
 721         IStream* iface,
 722         ULARGE_INTEGER libNewSize)
 723 {
 724     FIXME("\n");
 725     return E_NOTIMPL;
 726 }
 727
 728 static HRESULT WINAPI ITSS_IStream_CopyTo(
 729         IStream* iface,
 730         IStream* pstm,
 731         ULARGE_INTEGER cb,
 732         ULARGE_INTEGER* pcbRead,
 733         ULARGE_INTEGER* pcbWritten)
 734 {
 735     FIXME("\n");
 736     return E_NOTIMPL;
 737 }
 738
 739 static HRESULT WINAPI ITSS_IStream_Commit(
 740         IStream* iface,
 741         DWORD grfCommitFlags)
 742 {
 743     FIXME("\n");
 744     return E_NOTIMPL;
 745 }
 746
 747 static HRESULT WINAPI ITSS_IStream_Revert(
 748         IStream* iface)
 749 {
 750     FIXME("\n");
 751     return E_NOTIMPL;
 752 }
 753
 754 static HRESULT WINAPI ITSS_IStream_LockRegion(
 755         IStream* iface,
 756         ULARGE_INTEGER libOffset,
 757         ULARGE_INTEGER cb,
 758         DWORD dwLockType)
 759 {
 760     FIXME("\n");
 761     return E_NOTIMPL;
 762 }
 763
 764 static HRESULT WINAPI ITSS_IStream_UnlockRegion(
 765         IStream* iface,
 766         ULARGE_INTEGER libOffset,
 767         ULARGE_INTEGER cb,
 768         DWORD dwLockType)
 769 {
 770     FIXME("\n");
 771     return E_NOTIMPL;
 772 }
 773
 774 static HRESULT WINAPI ITSS_IStream_Stat(
 775         IStream* iface,
 776         STATSTG* pstatstg,
 777         DWORD grfStatFlag)
 778 {
 779     IStream_Impl *This = (IStream_Impl *)iface;
 780
 781     TRACE("%p %p %d\n", This, pstatstg, grfStatFlag);
 782
 783     memset( pstatstg, 0, sizeof *pstatstg );
 784     if( !( grfStatFlag & STATFLAG_NONAME ) )
 785     {
 786         FIXME("copy the name\n");
 787     }
 788     pstatstg->type = STGTY_STREAM;
 789     pstatstg->cbSize.QuadPart = This->ui.length;
 790     pstatstg->grfMode = STGM_READ;
 791     pstatstg->clsid = CLSID_ITStorage;
 792
 793     return S_OK;
 794 }
 795
 796 static HRESULT WINAPI ITSS_IStream_Clone(
 797         IStream* iface,
 798         IStream** ppstm)
 799 {
 800     FIXME("\n");
 801     return E_NOTIMPL;
 802 }
 803
 804 static const IStreamVtbl ITSS_IStream_vtbl =
 805 {
 806     ITSS_IStream_QueryInterface,
 807     ITSS_IStream_AddRef,
 808     ITSS_IStream_Release,
 809     ITSS_IStream_Read,
 810     ITSS_IStream_Write,
 811     ITSS_IStream_Seek,
 812     ITSS_IStream_SetSize,
 813     ITSS_IStream_CopyTo,
 814     ITSS_IStream_Commit,
 815     ITSS_IStream_Revert,
 816     ITSS_IStream_LockRegion,
 817     ITSS_IStream_UnlockRegion,
 818     ITSS_IStream_Stat,
 819     ITSS_IStream_Clone,
 820 };
 821
 822 static IStream_Impl *ITSS_create_stream(
 823            ITSS_IStorageImpl *stg, struct chmUnitInfo *ui )
 824 {
 825     IStream_Impl *stm;
 826
 827     stm = HeapAlloc( GetProcessHeap(), 0, sizeof (IStream_Impl) );
 828     stm->vtbl_IStream = &ITSS_IStream_vtbl;
 829     stm->ref = 1;
 830     stm->addr = 0;
 831     stm->ui = *ui;
 832     stm->stg = stg;
 833     IStorage_AddRef( (IStorage*) stg );
 834
 835     ITSS_LockModule();
 836
 837     TRACE(" -> %p\n", stm );
 838
 839     return stm;
 840 }