dlls/msi/record.c

   1 /*
   2  * Implementation of the Microsoft Installer (msi.dll)
   3  *
   4  * Copyright 2002-2004 Mike McCormack for CodeWeavers
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <stdarg.h>
  22
  23 #define COBJMACROS
  24
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "winuser.h"
  28 #include "winerror.h"
  29 #include "wine/debug.h"
  30 #include "msi.h"
  31 #include "msiquery.h"
  32 #include "msipriv.h"
  33 #include "objidl.h"
  34 #include "winnls.h"
  35 #include "ole2.h"
  36
  37 #include "query.h"
  38
  39 WINE_DEFAULT_DEBUG_CHANNEL(msi);
  40
  41 #define MSIFIELD_NULL   0
  42 #define MSIFIELD_INT    1
  43 #define MSIFIELD_STR    2
  44 #define MSIFIELD_WSTR   3
  45 #define MSIFIELD_STREAM 4
  46
  47 void MSI_FreeField( MSIFIELD *field )
  48 {
  49     switch( field->type )
  50     {
  51     case MSIFIELD_NULL:
  52     case MSIFIELD_INT:
  53         break;
  54     case MSIFIELD_WSTR:
  55         HeapFree( GetProcessHeap(), 0, field->u.szwVal);
  56         break;
  57     case MSIFIELD_STREAM:
  58         IStream_Release( field->u.stream );
  59         break;
  60     default:
  61         ERR("Invalid field type %d\n", field->type);
  62     }
  63 }
  64
  65 void MSI_CloseRecord( MSIOBJECTHDR *arg )
  66 {
  67     MSIRECORD *rec = (MSIRECORD *) arg;
  68     UINT i;
  69
  70     for( i=0; i<=rec->count; i++ )
  71         MSI_FreeField( &rec->fields[i] );
  72 }
  73
  74 MSIRECORD *MSI_CreateRecord( unsigned int cParams )
  75 {
  76     MSIRECORD *rec;
  77     UINT len;
  78
  79     TRACE("%d\n", cParams);
  80
  81     if( cParams>65535 )
  82         return NULL;
  83
  84     len = sizeof (MSIRECORD) + sizeof (MSIFIELD)*cParams;
  85     rec = alloc_msiobject( MSIHANDLETYPE_RECORD, len, MSI_CloseRecord );
  86     if( rec )
  87         rec->count = cParams;
  88     return rec;
  89 }
  90
  91 MSIHANDLE WINAPI MsiCreateRecord( unsigned int cParams )
  92 {
  93     MSIRECORD *rec;
  94     MSIHANDLE ret = 0;
  95
  96     TRACE("%d\n", cParams);
  97
  98     rec = MSI_CreateRecord( cParams );
  99     if( rec )
 100         ret = alloc_msihandle( &rec->hdr );
 101     return ret;
 102 }
 103
 104 unsigned int MSI_RecordGetFieldCount( MSIRECORD *rec )
 105 {
 106     return rec->count;
 107 }
 108
 109 unsigned int WINAPI MsiRecordGetFieldCount( MSIHANDLE handle )
 110 {
 111     MSIRECORD *rec;
 112     UINT ret;
 113
 114     TRACE("%ld\n", handle );
 115
 116     rec = msihandle2msiinfo( handle, MSIHANDLETYPE_RECORD );
 117     if( !rec )
 118         return -1;
 119
 120     msiobj_lock( &rec->hdr );
 121     ret = MSI_RecordGetFieldCount( rec );
 122     msiobj_unlock( &rec->hdr );
 123     msiobj_release( &rec->hdr );
 124
 125     return ret;
 126 }
 127
 128 static BOOL string2intW( LPCWSTR str, int *out )
 129 {
 130     int x = 0;
 131     LPCWSTR p = str;
 132
 133     if( *p == '-' ) /* skip the minus sign */
 134         p++;
 135     while ( *p )
 136     {
 137         if( (*p < '0') || (*p > '9') )
 138             return FALSE;
 139         x *= 10;
 140         x += (*p - '0');
 141         p++;
 142     }
 143
 144     if( str[0] == '-' ) /* check if it's negative */
 145         x = -x;
 146     *out = x;
 147
 148     return TRUE;
 149 }
 150
 151 int MSI_RecordGetInteger( MSIRECORD *rec, unsigned int iField)
 152 {
 153     int ret = 0;
 154
 155     TRACE("%p %d\n", rec, iField );
 156
 157     if( iField > rec->count )
 158         return MSI_NULL_INTEGER;
 159
 160     switch( rec->fields[iField].type )
 161     {
 162     case MSIFIELD_INT:
 163         return rec->fields[iField].u.iVal;
 164     case MSIFIELD_WSTR:
 165         if( string2intW( rec->fields[iField].u.szwVal, &ret ) )
 166             return ret;
 167         return MSI_NULL_INTEGER;
 168     default:
 169         break;
 170     }
 171
 172     return MSI_NULL_INTEGER;
 173 }
 174
 175 int WINAPI MsiRecordGetInteger( MSIHANDLE handle, unsigned int iField)
 176 {
 177     MSIRECORD *rec;
 178     UINT ret;
 179
 180     TRACE("%ld %d\n", handle, iField );
 181
 182     rec = msihandle2msiinfo( handle, MSIHANDLETYPE_RECORD );
 183     if( !rec )
 184         return MSI_NULL_INTEGER;
 185
 186     msiobj_lock( &rec->hdr );
 187     ret = MSI_RecordGetInteger( rec, iField );
 188     msiobj_unlock( &rec->hdr );
 189     msiobj_release( &rec->hdr );
 190
 191     return ret;
 192 }
 193
 194 UINT WINAPI MsiRecordClearData( MSIHANDLE handle )
 195 {
 196     MSIRECORD *rec;
 197     UINT i;
 198
 199     TRACE("%ld\n", handle );
 200
 201     rec = msihandle2msiinfo( handle, MSIHANDLETYPE_RECORD );
 202     if( !rec )
 203         return ERROR_INVALID_HANDLE;
 204
 205     msiobj_lock( &rec->hdr );
 206     for( i=0; i<=rec->count; i++)
 207     {
 208         MSI_FreeField( &rec->fields[i] );
 209         rec->fields[i].type = MSIFIELD_NULL;
 210         rec->fields[i].u.iVal = 0;
 211     }
 212     msiobj_unlock( &rec->hdr );
 213
 214     return ERROR_SUCCESS;
 215 }
 216
 217 UINT MSI_RecordSetInteger( MSIRECORD *rec, unsigned int iField, int iVal )
 218 {
 219     TRACE("%p %u %d\n", rec, iField, iVal);
 220
 221     if( iField > rec->count )
 222         return ERROR_INVALID_PARAMETER;
 223
 224     MSI_FreeField( &rec->fields[iField] );
 225     rec->fields[iField].type = MSIFIELD_INT;
 226     rec->fields[iField].u.iVal = iVal;
 227
 228     return ERROR_SUCCESS;
 229 }
 230
 231 UINT WINAPI MsiRecordSetInteger( MSIHANDLE handle, unsigned int iField, int iVal )
 232 {
 233     MSIRECORD *rec;
 234     UINT ret;
 235
 236     TRACE("%ld %u %d\n", handle, iField, iVal);
 237
 238     rec = msihandle2msiinfo( handle, MSIHANDLETYPE_RECORD );
 239     if( !rec )
 240         return ERROR_INVALID_HANDLE;
 241
 242     msiobj_lock( &rec->hdr );
 243     ret = MSI_RecordSetInteger( rec, iField, iVal );
 244     msiobj_unlock( &rec->hdr );
 245     msiobj_release( &rec->hdr );
 246     return ret;
 247 }
 248
 249 BOOL MSI_RecordIsNull( MSIRECORD *rec, unsigned int iField )
 250 {
 251     BOOL r = TRUE;
 252
 253     TRACE("%p %d\n", rec, iField );
 254
 255     r = ( iField > rec->count ) ||
 256         ( rec->fields[iField].type == MSIFIELD_NULL );
 257
 258     return r;
 259 }
 260
 261 BOOL WINAPI MsiRecordIsNull( MSIHANDLE handle, unsigned int iField )
 262 {
 263     MSIRECORD *rec;
 264     UINT ret;
 265
 266     TRACE("%ld %d\n", handle, iField );
 267
 268     rec = msihandle2msiinfo( handle, MSIHANDLETYPE_RECORD );
 269     if( !rec )
 270         return 0;
 271     msiobj_lock( &rec->hdr );
 272     ret = MSI_RecordIsNull( rec, iField );
 273     msiobj_unlock( &rec->hdr );
 274     msiobj_release( &rec->hdr );
 275     return ret;
 276
 277 }
 278
 279 UINT MSI_RecordGetStringA(MSIRECORD *rec, unsigned int iField,
 280                LPSTR szValue, DWORD *pcchValue)
 281 {
 282     UINT len=0, ret;
 283     CHAR buffer[16];
 284
 285     TRACE("%p %d %p %p\n", rec, iField, szValue, pcchValue);
 286
 287     if( iField > rec->count )
 288         return ERROR_INVALID_PARAMETER;
 289
 290     ret = ERROR_SUCCESS;
 291     switch( rec->fields[iField].type )
 292     {
 293     case MSIFIELD_INT:
 294         wsprintfA(buffer, "%d", rec->fields[iField].u.iVal);
 295         len = lstrlenA( buffer );
 296         lstrcpynA(szValue, buffer, *pcchValue);
 297         break;
 298     case MSIFIELD_WSTR:
 299         len = WideCharToMultiByte( CP_ACP, 0, rec->fields[iField].u.szwVal, -1,
 300                              NULL, 0 , NULL, NULL);
 301         WideCharToMultiByte( CP_ACP, 0, rec->fields[iField].u.szwVal, -1,
 302                              szValue, *pcchValue, NULL, NULL);
 303         if( *pcchValue && len>*pcchValue )
 304             szValue[*pcchValue-1] = 0;
 305         if( len )
 306             len--;
 307         break;
 308     case MSIFIELD_NULL:
 309         if( *pcchValue > 0 )
 310             szValue[0] = 0;
 311         break;
 312     default:
 313         ret = ERROR_INVALID_PARAMETER;
 314         break;
 315     }
 316
 317     if( *pcchValue < len )
 318         ret = ERROR_MORE_DATA;
 319     *pcchValue = len;
 320
 321     return ret;
 322 }
 323
 324 UINT WINAPI MsiRecordGetStringA(MSIHANDLE handle, unsigned int iField,
 325                LPSTR szValue, DWORD *pcchValue)
 326 {
 327     MSIRECORD *rec;
 328     UINT ret;
 329
 330     TRACE("%ld %d %p %p\n", handle, iField, szValue, pcchValue);
 331
 332     rec = msihandle2msiinfo( handle, MSIHANDLETYPE_RECORD );
 333     if( !rec )
 334         return ERROR_INVALID_HANDLE;
 335     msiobj_lock( &rec->hdr );
 336     ret = MSI_RecordGetStringA( rec, iField, szValue, pcchValue);
 337     msiobj_unlock( &rec->hdr );
 338     msiobj_release( &rec->hdr );
 339     return ret;
 340 }
 341
 342 const WCHAR *MSI_RecordGetString( MSIRECORD *rec, unsigned int iField )
 343 {
 344     if( iField > rec->count )
 345         return NULL;
 346
 347     if( rec->fields[iField].type != MSIFIELD_WSTR )
 348         return NULL;
 349
 350     return rec->fields[iField].u.szwVal;
 351 }
 352
 353 UINT MSI_RecordGetStringW(MSIRECORD *rec, unsigned int iField,
 354                LPWSTR szValue, DWORD *pcchValue)
 355 {
 356     UINT len=0, ret;
 357     WCHAR buffer[16];
 358     static const WCHAR szFormat[] = { '%','d',0 };
 359
 360     TRACE("%p %d %p %p\n", rec, iField, szValue, pcchValue);
 361
 362     if( iField > rec->count )
 363         return ERROR_INVALID_PARAMETER;
 364
 365     ret = ERROR_SUCCESS;
 366     switch( rec->fields[iField].type )
 367     {
 368     case MSIFIELD_INT:
 369         wsprintfW(buffer, szFormat, rec->fields[iField].u.iVal);
 370         len = lstrlenW( buffer );
 371         lstrcpynW(szValue, buffer, *pcchValue);
 372         break;
 373     case MSIFIELD_WSTR:
 374         len = lstrlenW( rec->fields[iField].u.szwVal );
 375         lstrcpynW(szValue, rec->fields[iField].u.szwVal, *pcchValue);
 376         break;
 377     case MSIFIELD_NULL:
 378         len = 1;
 379         if( *pcchValue > 0 )
 380             szValue[0] = 0;
 381     default:
 382         break;
 383     }
 384
 385     if( *pcchValue < len )
 386         ret = ERROR_MORE_DATA;
 387     *pcchValue = len;
 388
 389     return ret;
 390 }
 391
 392 UINT WINAPI MsiRecordGetStringW(MSIHANDLE handle, unsigned int iField,
 393                LPWSTR szValue, DWORD *pcchValue)
 394 {
 395     MSIRECORD *rec;
 396     UINT ret;
 397
 398     TRACE("%ld %d %p %p\n", handle, iField, szValue, pcchValue);
 399
 400     rec = msihandle2msiinfo( handle, MSIHANDLETYPE_RECORD );
 401     if( !rec )
 402         return ERROR_INVALID_HANDLE;
 403
 404     msiobj_lock( &rec->hdr );
 405     ret = MSI_RecordGetStringW( rec, iField, szValue, pcchValue );
 406     msiobj_unlock( &rec->hdr );
 407     msiobj_release( &rec->hdr );
 408     return ret;
 409 }
 410
 411 UINT MSI_RecordDataSize(MSIRECORD *rec, unsigned int iField)
 412 {
 413     TRACE("%p %d\n", rec, iField);
 414
 415     if( iField > rec->count )
 416         return 0;
 417
 418     switch( rec->fields[iField].type )
 419     {
 420     case MSIFIELD_INT:
 421         return sizeof (INT);
 422     case MSIFIELD_WSTR:
 423         return lstrlenW( rec->fields[iField].u.szwVal );
 424     case MSIFIELD_NULL:
 425         break;
 426     }
 427     return 0;
 428 }
 429
 430 UINT WINAPI MsiRecordDataSize(MSIHANDLE handle, unsigned int iField)
 431 {
 432     MSIRECORD *rec;
 433     UINT ret;
 434
 435     TRACE("%ld %d\n", handle, iField);
 436
 437     rec = msihandle2msiinfo( handle, MSIHANDLETYPE_RECORD );
 438     if( !rec )
 439         return 0;
 440     msiobj_lock( &rec->hdr );
 441     ret = MSI_RecordDataSize( rec, iField);
 442     msiobj_unlock( &rec->hdr );
 443     msiobj_release( &rec->hdr );
 444     return ret;
 445 }
 446
 447 UINT MSI_RecordSetStringA( MSIRECORD *rec, unsigned int iField, LPCSTR szValue )
 448 {
 449     LPWSTR str;
 450     UINT len;
 451
 452     TRACE("%p %d %s\n", rec, iField, debugstr_a(szValue));
 453
 454     if( iField > rec->count )
 455         return ERROR_INVALID_FIELD;
 456
 457     len = MultiByteToWideChar( CP_ACP, 0, szValue, -1, NULL, 0 );
 458     str = HeapAlloc( GetProcessHeap(), 0, len*sizeof(WCHAR) );
 459     MultiByteToWideChar( CP_ACP, 0, szValue, -1, str, len );
 460     MSI_FreeField( &rec->fields[iField] );
 461     rec->fields[iField].type = MSIFIELD_WSTR;
 462     rec->fields[iField].u.szwVal = str;
 463
 464     return 0;
 465 }
 466
 467 UINT WINAPI MsiRecordSetStringA( MSIHANDLE handle, unsigned int iField, LPCSTR szValue )
 468 {
 469     MSIRECORD *rec;
 470     UINT ret;
 471
 472     TRACE("%ld %d %s\n", handle, iField, debugstr_a(szValue));
 473
 474     rec = msihandle2msiinfo( handle, MSIHANDLETYPE_RECORD );
 475     if( !rec )
 476         return ERROR_INVALID_HANDLE;
 477     msiobj_lock( &rec->hdr );
 478     ret = MSI_RecordSetStringA( rec, iField, szValue );
 479     msiobj_unlock( &rec->hdr );
 480     msiobj_release( &rec->hdr );
 481     return ret;
 482 }
 483
 484 UINT MSI_RecordSetStringW( MSIRECORD *rec, unsigned int iField, LPCWSTR szValue )
 485 {
 486     LPWSTR str;
 487     UINT len;
 488
 489     TRACE("%p %d %s\n", rec, iField, debugstr_w(szValue));
 490
 491     if( iField > rec->count )
 492         return ERROR_INVALID_FIELD;
 493
 494     len = lstrlenW(szValue) + 1;
 495     str = HeapAlloc( GetProcessHeap(), 0, len*sizeof (WCHAR));
 496     lstrcpyW( str, szValue );
 497
 498     MSI_FreeField( &rec->fields[iField] );
 499     rec->fields[iField].type = MSIFIELD_WSTR;
 500     rec->fields[iField].u.szwVal = str;
 501
 502     return 0;
 503 }
 504
 505 UINT WINAPI MsiRecordSetStringW( MSIHANDLE handle, unsigned int iField, LPCWSTR szValue )
 506 {
 507     MSIRECORD *rec;
 508     UINT ret;
 509
 510     TRACE("%ld %d %s\n", handle, iField, debugstr_w(szValue));
 511
 512     rec = msihandle2msiinfo( handle, MSIHANDLETYPE_RECORD );
 513     if( !rec )
 514         return ERROR_INVALID_HANDLE;
 515
 516     msiobj_lock( &rec->hdr );
 517     ret = MSI_RecordSetStringW( rec, iField, szValue );
 518     msiobj_unlock( &rec->hdr );
 519     msiobj_release( &rec->hdr );
 520     return ret;
 521 }
 522
 523 /* read the data in a file into an IStream */
 524 UINT RECORD_StreamFromFile(LPCWSTR szFile, IStream **pstm)
 525 {
 526     DWORD sz, szHighWord = 0, read;
 527     HANDLE handle;
 528     HGLOBAL hGlob = 0;
 529     HRESULT hr;
 530     ULARGE_INTEGER ulSize;
 531
 532     TRACE("reading %s\n", debugstr_w(szFile));
 533
 534     /* read the file into memory */
 535     handle = CreateFileW(szFile, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
 536     if( handle == INVALID_HANDLE_VALUE )
 537         return GetLastError();
 538     sz = GetFileSize(handle, &szHighWord);
 539     if( sz != INVALID_FILE_SIZE && szHighWord == 0 )
 540     {
 541         hGlob = GlobalAlloc(GMEM_FIXED, sz);
 542         if( hGlob )
 543         {
 544             BOOL r = ReadFile(handle, hGlob, sz, &read, NULL);
 545             if( !r )
 546             {
 547                 GlobalFree(hGlob);
 548                 hGlob = 0;
 549             }
 550         }
 551     }
 552     CloseHandle(handle);
 553     if( !hGlob )
 554         return ERROR_FUNCTION_FAILED;
 555
 556     /* make a stream out of it, and set the correct file size */
 557     hr = CreateStreamOnHGlobal(hGlob, TRUE, pstm);
 558     if( FAILED( hr ) )
 559     {
 560         GlobalFree(hGlob);
 561         return ERROR_FUNCTION_FAILED;
 562     }
 563
 564     /* set the correct size - CreateStreamOnHGlobal screws it up */
 565     ulSize.QuadPart = sz;
 566     IStream_SetSize(*pstm, ulSize);
 567
 568     TRACE("read %s, %ld bytes into IStream %p\n", debugstr_w(szFile), sz, *pstm);
 569
 570     return ERROR_SUCCESS;
 571 }
 572
 573 UINT MSI_RecordSetStreamW(MSIRECORD *rec, unsigned int iField, LPCWSTR szFilename)
 574 {
 575     IStream *stm = NULL;
 576     HRESULT r;
 577
 578     if( (iField == 0) || (iField > rec->count) )
 579         return ERROR_INVALID_PARAMETER;
 580
 581     /* no filename means we should seek back to the start of the stream */
 582     if( !szFilename )
 583     {
 584         LARGE_INTEGER ofs;
 585         ULARGE_INTEGER cur;
 586
 587         if( rec->fields[iField].type != MSIFIELD_STREAM )
 588             return ERROR_INVALID_FIELD;
 589
 590         stm = rec->fields[iField].u.stream;
 591         if( !stm )
 592             return ERROR_INVALID_FIELD;
 593
 594         ofs.QuadPart = 0;
 595         r = IStream_Seek( stm, ofs, STREAM_SEEK_SET, &cur );
 596         if( FAILED( r ) )
 597             return ERROR_FUNCTION_FAILED;
 598     }
 599     else
 600     {
 601         /* read the file into a stream and save the stream in the record */
 602         r = RECORD_StreamFromFile(szFilename, &stm);
 603         if( r != ERROR_SUCCESS )
 604             return r;
 605
 606         /* if all's good, store it in the record */
 607         MSI_FreeField( &rec->fields[iField] );
 608         rec->fields[iField].type = MSIFIELD_STREAM;
 609         rec->fields[iField].u.stream = stm;
 610     }
 611
 612     return ERROR_SUCCESS;
 613 }
 614
 615 UINT WINAPI MsiRecordSetStreamA(MSIHANDLE hRecord, unsigned int iField, LPCSTR szFilename)
 616 {
 617     LPWSTR wstr = NULL;
 618     UINT ret, len;
 619
 620     TRACE("%ld %d %s\n", hRecord, iField, debugstr_a(szFilename));
 621
 622     if( szFilename )
 623     {
 624         len = MultiByteToWideChar(CP_ACP,0,szFilename,-1,NULL,0);
 625         wstr = HeapAlloc(GetProcessHeap(),0,len*sizeof(WCHAR));
 626         MultiByteToWideChar(CP_ACP,0,szFilename,-1,wstr,len);
 627     }
 628     ret = MsiRecordSetStreamW(hRecord, iField, wstr);
 629     HeapFree(GetProcessHeap(),0,wstr);
 630
 631     return ret;
 632 }
 633
 634 UINT WINAPI MsiRecordSetStreamW(MSIHANDLE handle, unsigned int iField, LPCWSTR szFilename)
 635 {
 636     MSIRECORD *rec;
 637     UINT ret;
 638
 639     TRACE("%ld %d %s\n", handle, iField, debugstr_w(szFilename));
 640
 641     rec = msihandle2msiinfo( handle, MSIHANDLETYPE_RECORD );
 642     if( !rec )
 643         return ERROR_INVALID_HANDLE;
 644
 645     msiobj_lock( &rec->hdr );
 646     ret = MSI_RecordSetStreamW( rec, iField, szFilename );
 647     msiobj_unlock( &rec->hdr );
 648     msiobj_release( &rec->hdr );
 649     return ret;
 650 }
 651
 652 UINT MSI_RecordReadStream(MSIRECORD *rec, unsigned int iField, char *buf, DWORD *sz)
 653 {
 654     ULONG count;
 655     HRESULT r;
 656     IStream *stm;
 657
 658     TRACE("%p %d %p %p\n", rec, iField, buf, sz);
 659
 660     if( !sz )
 661         return ERROR_INVALID_PARAMETER;
 662
 663     if( iField > rec->count)
 664         return ERROR_INVALID_PARAMETER;
 665
 666     if( rec->fields[iField].type != MSIFIELD_STREAM )
 667         return ERROR_INVALID_DATATYPE;
 668
 669     stm = rec->fields[iField].u.stream;
 670     if( !stm )
 671         return ERROR_INVALID_PARAMETER;
 672
 673     /* if there's no buffer pointer, calculate the length to the end */
 674     if( !buf )
 675     {
 676         LARGE_INTEGER ofs;
 677         ULARGE_INTEGER end, cur;
 678
 679         ofs.QuadPart = cur.QuadPart = 0;
 680         end.QuadPart = 0;
 681         r = IStream_Seek( stm, ofs, STREAM_SEEK_SET, &cur );
 682         IStream_Seek( stm, ofs, STREAM_SEEK_END, &end );
 683         ofs.QuadPart = cur.QuadPart;
 684         IStream_Seek( stm, ofs, STREAM_SEEK_SET, &cur );
 685         *sz = end.QuadPart - cur.QuadPart;
 686
 687         return ERROR_SUCCESS;
 688     }
 689
 690     /* read the data */
 691     count = 0;
 692     r = IStream_Read( stm, buf, *sz, &count );
 693     if( FAILED( r ) )
 694     {
 695         *sz = 0;
 696         return ERROR_FUNCTION_FAILED;
 697     }
 698
 699     *sz = count;
 700
 701     return ERROR_SUCCESS;
 702 }
 703
 704 UINT WINAPI MsiRecordReadStream(MSIHANDLE handle, unsigned int iField, char *buf, DWORD *sz)
 705 {
 706     MSIRECORD *rec;
 707     UINT ret;
 708
 709     TRACE("%ld %d %p %p\n", handle, iField, buf, sz);
 710
 711     rec = msihandle2msiinfo( handle, MSIHANDLETYPE_RECORD );
 712     if( !rec )
 713         return ERROR_INVALID_HANDLE;
 714     msiobj_lock( &rec->hdr );
 715     ret = MSI_RecordReadStream( rec, iField, buf, sz );
 716     msiobj_unlock( &rec->hdr );
 717     msiobj_release( &rec->hdr );
 718     return ret;
 719 }
 720
 721 UINT MSI_RecordSetIStream( MSIRECORD *rec, unsigned int iField, IStream *stm )
 722 {
 723     TRACE("%p %d %p\n", rec, iField, stm);
 724
 725     if( iField > rec->count )
 726         return ERROR_INVALID_FIELD;
 727
 728     MSI_FreeField( &rec->fields[iField] );
 729
 730     rec->fields[iField].type = MSIFIELD_STREAM;
 731     rec->fields[iField].u.stream = stm;
 732     IStream_AddRef( stm );
 733
 734     return ERROR_SUCCESS;
 735 }