dlls/msi/helpers.c

   1 /*
   2  * Implementation of the Microsoft Installer (msi.dll)
   3  *
   4  * Copyright 2005 Aric Stewart 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 /*
  22  * Here are helper functions formally in action.c that are used by a variety of
  23  * actions and functions.
  24  */
  25
  26 #include <stdarg.h>
  27
  28 #include "windef.h"
  29 #include "wine/debug.h"
  30 #include "msipriv.h"
  31 #include "winuser.h"
  32 #include "wine/unicode.h"
  33 #include "msidefs.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(msi);
  36
  37 static const WCHAR cszTargetDir[] = {'T','A','R','G','E','T','D','I','R',0};
  38 static const WCHAR cszDatabase[]={'D','A','T','A','B','A','S','E',0};
  39
  40 LPWSTR build_icon_path(MSIPACKAGE *package, LPCWSTR icon_name )
  41 {
  42     LPWSTR SystemFolder, dest, FilePath;
  43
  44     static const WCHAR szMicrosoft[] =
  45         {'M','i','c','r','o','s','o','f','t','\\',0};
  46     static const WCHAR szInstaller[] =
  47         {'I','n','s','t','a','l','l','e','r','\\',0};
  48     static const WCHAR szADFolder[] =
  49         {'A','p','p','D','a','t','a','F','o','l','d','e','r',0};
  50     static const WCHAR szWFolder[] =
  51         {'W','i','n','d','o','w','s','F','o','l','d','e','r',0};
  52
  53     if(package->Context == MSIINSTALLCONTEXT_MACHINE)
  54         SystemFolder = msi_dup_property( package->db, szWFolder );
  55     else
  56     {
  57         LPWSTR ADTgt = msi_dup_property( package->db, szADFolder );
  58         SystemFolder = build_directory_name(2, ADTgt, szMicrosoft);
  59         msi_free(ADTgt);
  60     }
  61
  62     dest = build_directory_name(3, SystemFolder, szInstaller, package->ProductCode);
  63
  64     create_full_pathW(dest);
  65
  66     FilePath = build_directory_name(2, dest, icon_name);
  67
  68     msi_free(SystemFolder);
  69     msi_free(dest);
  70     return FilePath;
  71 }
  72
  73 LPWSTR msi_dup_record_field( MSIRECORD *rec, INT field )
  74 {
  75     DWORD sz = 0;
  76     LPWSTR str;
  77     UINT r;
  78
  79     if (MSI_RecordIsNull( rec, field ))
  80         return NULL;
  81
  82     r = MSI_RecordGetStringW( rec, field, NULL, &sz );
  83     if (r != ERROR_SUCCESS)
  84         return NULL;
  85
  86     sz ++;
  87     str = msi_alloc( sz * sizeof (WCHAR) );
  88     if (!str)
  89         return str;
  90     str[0] = 0;
  91     r = MSI_RecordGetStringW( rec, field, str, &sz );
  92     if (r != ERROR_SUCCESS)
  93     {
  94         ERR("failed to get string!\n");
  95         msi_free( str );
  96         return NULL;
  97     }
  98     return str;
  99 }
 100
 101 MSICOMPONENT* get_loaded_component( MSIPACKAGE* package, LPCWSTR Component )
 102 {
 103     MSICOMPONENT *comp;
 104
 105     LIST_FOR_EACH_ENTRY( comp, &package->components, MSICOMPONENT, entry )
 106     {
 107         if (!strcmpW( Component, comp->Component ))
 108             return comp;
 109     }
 110     return NULL;
 111 }
 112
 113 MSIFEATURE* get_loaded_feature(MSIPACKAGE* package, LPCWSTR Feature )
 114 {
 115     MSIFEATURE *feature;
 116
 117     LIST_FOR_EACH_ENTRY( feature, &package->features, MSIFEATURE, entry )
 118     {
 119         if (!strcmpW( Feature, feature->Feature ))
 120             return feature;
 121     }
 122     return NULL;
 123 }
 124
 125 MSIFILE* get_loaded_file( MSIPACKAGE* package, LPCWSTR key )
 126 {
 127     MSIFILE *file;
 128
 129     LIST_FOR_EACH_ENTRY( file, &package->files, MSIFILE, entry )
 130     {
 131         if (!strcmpW( key, file->File ))
 132             return file;
 133     }
 134     return NULL;
 135 }
 136
 137 int track_tempfile( MSIPACKAGE *package, LPCWSTR path )
 138 {
 139     MSITEMPFILE *temp;
 140
 141     TRACE("%s\n", debugstr_w(path));
 142
 143     LIST_FOR_EACH_ENTRY( temp, &package->tempfiles, MSITEMPFILE, entry )
 144         if (!strcmpW( path, temp->Path ))
 145             return 0;
 146
 147     temp = msi_alloc_zero( sizeof (MSITEMPFILE) );
 148     if (!temp)
 149         return -1;
 150
 151     list_add_head( &package->tempfiles, &temp->entry );
 152     temp->Path = strdupW( path );
 153
 154     return 0;
 155 }
 156
 157 MSIFOLDER *get_loaded_folder( MSIPACKAGE *package, LPCWSTR dir )
 158 {
 159     MSIFOLDER *folder;
 160
 161     LIST_FOR_EACH_ENTRY( folder, &package->folders, MSIFOLDER, entry )
 162     {
 163         if (!strcmpW( dir, folder->Directory ))
 164             return folder;
 165     }
 166     return NULL;
 167 }
 168
 169 static LPWSTR get_source_root( MSIPACKAGE *package )
 170 {
 171     LPWSTR path, p;
 172
 173     path = msi_dup_property( package->db, cszSourceDir );
 174     if (path)
 175         return path;
 176
 177     path = msi_dup_property( package->db, cszDatabase );
 178     if (path)
 179     {
 180         p = strrchrW(path,'\\');
 181         if (p)
 182             *(p+1) = 0;
 183     }
 184     return path;
 185 }
 186
 187 /*
 188  * clean_spaces_from_path()
 189  *
 190  * removes spaces from the beginning and end of path segments
 191  * removes multiple \\ characters
 192  */
 193 static void clean_spaces_from_path( LPWSTR p )
 194 {
 195     LPWSTR q = p;
 196     int n, len = 0;
 197
 198     while (1)
 199     {
 200         /* copy until the end of the string or a space */
 201         while (*p != ' ' && (*q = *p))
 202         {
 203             p++, len++;
 204             /* reduce many backslashes to one */
 205             if (*p != '\\' || *q != '\\')
 206                 q++;
 207         }
 208
 209         /* quit at the end of the string */
 210         if (!*p)
 211             break;
 212
 213         /* count the number of spaces */
 214         n = 0;
 215         while (p[n] == ' ')
 216             n++;
 217
 218         /* if it's leading or trailing space, skip it */
 219         if ( len == 0 || p[-1] == '\\' || p[n] == '\\' )
 220             p += n;
 221         else  /* copy n spaces */
 222             while (n && (*q++ = *p++)) n--;
 223     }
 224 }
 225
 226 LPWSTR resolve_file_source(MSIPACKAGE *package, MSIFILE *file)
 227 {
 228     LPWSTR p, path;
 229
 230     TRACE("Working to resolve source of file %s\n", debugstr_w(file->File));
 231
 232     if (file->IsCompressed)
 233         return NULL;
 234
 235     p = resolve_folder(package, file->Component->Directory,
 236                        TRUE, FALSE, TRUE, NULL);
 237     path = build_directory_name(2, p, file->ShortName);
 238
 239     if (file->LongName &&
 240         GetFileAttributesW(path) == INVALID_FILE_ATTRIBUTES)
 241     {
 242         msi_free(path);
 243         path = build_directory_name(2, p, file->LongName);
 244     }
 245
 246     msi_free(p);
 247
 248     TRACE("file %s source resolves to %s\n", debugstr_w(file->File),
 249           debugstr_w(path));
 250
 251     return path;
 252 }
 253
 254 LPWSTR resolve_folder(MSIPACKAGE *package, LPCWSTR name, BOOL source,
 255                       BOOL set_prop, BOOL load_prop, MSIFOLDER **folder)
 256 {
 257     MSIFOLDER *f;
 258     LPWSTR p, path = NULL, parent;
 259
 260     TRACE("Working to resolve %s\n",debugstr_w(name));
 261
 262     if (!name)
 263         return NULL;
 264
 265     if (!strcmpW( name, cszSourceDir ))
 266         name = cszTargetDir;
 267
 268     f = get_loaded_folder( package, name );
 269     if (!f)
 270         return NULL;
 271
 272     /* special resolving for Target and Source root dir */
 273     if (!strcmpW( name, cszTargetDir ))
 274     {
 275         if (!f->ResolvedTarget && !f->Property)
 276         {
 277             LPWSTR check_path;
 278             check_path = msi_dup_property( package->db, cszTargetDir );
 279             if (!check_path)
 280             {
 281                 check_path = msi_dup_property( package->db, cszRootDrive );
 282                 if (set_prop)
 283                     msi_set_property( package->db, cszTargetDir, check_path );
 284             }
 285
 286             /* correct misbuilt target dir */
 287             path = build_directory_name(2, check_path, NULL);
 288             clean_spaces_from_path( path );
 289             if (strcmpiW( path, check_path ))
 290                 msi_set_property( package->db, cszTargetDir, path );
 291             msi_free(check_path);
 292
 293             f->ResolvedTarget = path;
 294         }
 295
 296         if (!f->ResolvedSource)
 297             f->ResolvedSource = get_source_root( package );
 298     }
 299
 300     if (folder)
 301         *folder = f;
 302
 303     if (!source && f->ResolvedTarget)
 304     {
 305         path = strdupW( f->ResolvedTarget );
 306         TRACE("   already resolved to %s\n",debugstr_w(path));
 307         return path;
 308     }
 309
 310     if (source && f->ResolvedSource)
 311     {
 312         path = strdupW( f->ResolvedSource );
 313         TRACE("   (source)already resolved to %s\n",debugstr_w(path));
 314         return path;
 315     }
 316
 317     if (!source && f->Property)
 318     {
 319         path = build_directory_name( 2, f->Property, NULL );
 320
 321         TRACE("   internally set to %s\n",debugstr_w(path));
 322         if (set_prop)
 323             msi_set_property( package->db, name, path );
 324         return path;
 325     }
 326
 327     if (!source && load_prop && (path = msi_dup_property( package->db, name )))
 328     {
 329         f->ResolvedTarget = strdupW( path );
 330         TRACE("   property set to %s\n", debugstr_w(path));
 331         return path;
 332     }
 333
 334     if (!f->Parent)
 335         return path;
 336
 337     parent = f->Parent;
 338
 339     TRACE(" ! Parent is %s\n", debugstr_w(parent));
 340
 341     p = resolve_folder(package, parent, source, set_prop, load_prop, NULL);
 342     if (!source)
 343     {
 344         TRACE("   TargetDefault = %s\n", debugstr_w(f->TargetDefault));
 345
 346         path = build_directory_name( 3, p, f->TargetDefault, NULL );
 347         clean_spaces_from_path( path );
 348         f->ResolvedTarget = strdupW( path );
 349         TRACE("target -> %s\n", debugstr_w(path));
 350         if (set_prop)
 351             msi_set_property( package->db, name, path );
 352     }
 353     else
 354     {
 355         path = NULL;
 356
 357         if (package->WordCount & msidbSumInfoSourceTypeCompressed)
 358             path = get_source_root( package );
 359         else if (package->WordCount & msidbSumInfoSourceTypeSFN)
 360             path = build_directory_name( 3, p, f->SourceShortPath, NULL );
 361         else
 362             path = build_directory_name( 3, p, f->SourceLongPath, NULL );
 363
 364         TRACE("source -> %s\n", debugstr_w(path));
 365         f->ResolvedSource = strdupW( path );
 366     }
 367     msi_free(p);
 368
 369     return path;
 370 }
 371
 372 /* wrapper to resist a need for a full rewrite right now */
 373 DWORD deformat_string(MSIPACKAGE *package, LPCWSTR ptr, WCHAR** data )
 374 {
 375     if (ptr)
 376     {
 377         MSIRECORD *rec = MSI_CreateRecord(1);
 378         DWORD size = 0;
 379
 380         MSI_RecordSetStringW(rec,0,ptr);
 381         MSI_FormatRecordW(package,rec,NULL,&size);
 382
 383         size++;
 384         *data = msi_alloc(size*sizeof(WCHAR));
 385         if (size > 1)
 386             MSI_FormatRecordW(package,rec,*data,&size);
 387         else
 388             *data[0] = 0;
 389
 390         msiobj_release( &rec->hdr );
 391         return sizeof(WCHAR)*size;
 392     }
 393
 394     *data = NULL;
 395     return 0;
 396 }
 397
 398 UINT schedule_action(MSIPACKAGE *package, UINT script, LPCWSTR action)
 399 {
 400     UINT count;
 401     LPWSTR *newbuf = NULL;
 402     if (script >= TOTAL_SCRIPTS)
 403     {
 404         FIXME("Unknown script requested %i\n",script);
 405         return ERROR_FUNCTION_FAILED;
 406     }
 407     TRACE("Scheduling Action %s in script %i\n",debugstr_w(action), script);
 408
 409     count = package->script->ActionCount[script];
 410     package->script->ActionCount[script]++;
 411     if (count != 0)
 412         newbuf = msi_realloc( package->script->Actions[script],
 413                         package->script->ActionCount[script]* sizeof(LPWSTR));
 414     else
 415         newbuf = msi_alloc( sizeof(LPWSTR));
 416
 417     newbuf[count] = strdupW(action);
 418     package->script->Actions[script] = newbuf;
 419
 420    return ERROR_SUCCESS;
 421 }
 422
 423 void msi_free_action_script(MSIPACKAGE *package, UINT script)
 424 {
 425     UINT i;
 426     for (i = 0; i < package->script->ActionCount[script]; i++)
 427         msi_free(package->script->Actions[script][i]);
 428
 429     msi_free(package->script->Actions[script]);
 430     package->script->Actions[script] = NULL;
 431     package->script->ActionCount[script] = 0;
 432 }
 433
 434 /*
 435  *  build_directory_name()
 436  *
 437  *  This function is to save messing round with directory names
 438  *  It handles adding backslashes between path segments,
 439  *   and can add \ at the end of the directory name if told to.
 440  *
 441  *  It takes a variable number of arguments.
 442  *  It always allocates a new string for the result, so make sure
 443  *   to free the return value when finished with it.
 444  *
 445  *  The first arg is the number of path segments that follow.
 446  *  The arguments following count are a list of path segments.
 447  *  A path segment may be NULL.
 448  *
 449  *  Path segments will be added with a \ separating them.
 450  *  A \ will not be added after the last segment, however if the
 451  *    last segment is NULL, then the last character will be a \
 452  *
 453  */
 454 LPWSTR build_directory_name(DWORD count, ...)
 455 {
 456     DWORD sz = 1, i;
 457     LPWSTR dir;
 458     va_list va;
 459
 460     va_start(va,count);
 461     for(i=0; i<count; i++)
 462     {
 463         LPCWSTR str = va_arg(va,LPCWSTR);
 464         if (str)
 465             sz += strlenW(str) + 1;
 466     }
 467     va_end(va);
 468
 469     dir = msi_alloc(sz*sizeof(WCHAR));
 470     dir[0]=0;
 471
 472     va_start(va,count);
 473     for(i=0; i<count; i++)
 474     {
 475         LPCWSTR str = va_arg(va,LPCWSTR);
 476         if (!str)
 477             continue;
 478         strcatW(dir, str);
 479         if( ((i+1)!=count) && dir[strlenW(dir)-1]!='\\')
 480             strcatW(dir, szBackSlash);
 481     }
 482     return dir;
 483 }
 484
 485 /***********************************************************************
 486  *            create_full_pathW
 487  *
 488  * Recursively create all directories in the path.
 489  *
 490  * shamelessly stolen from setupapi/queue.c
 491  */
 492 BOOL create_full_pathW(const WCHAR *path)
 493 {
 494     BOOL ret = TRUE;
 495     int len;
 496     WCHAR *new_path;
 497
 498     new_path = msi_alloc( (strlenW(path) + 1) * sizeof(WCHAR));
 499
 500     strcpyW(new_path, path);
 501
 502     while((len = strlenW(new_path)) && new_path[len - 1] == '\\')
 503     new_path[len - 1] = 0;
 504
 505     while(!CreateDirectoryW(new_path, NULL))
 506     {
 507         WCHAR *slash;
 508         DWORD last_error = GetLastError();
 509         if(last_error == ERROR_ALREADY_EXISTS)
 510             break;
 511
 512         if(last_error != ERROR_PATH_NOT_FOUND)
 513         {
 514             ret = FALSE;
 515             break;
 516         }
 517
 518         if(!(slash = strrchrW(new_path, '\\')))
 519         {
 520             ret = FALSE;
 521             break;
 522         }
 523
 524         len = slash - new_path;
 525         new_path[len] = 0;
 526         if(!create_full_pathW(new_path))
 527         {
 528             ret = FALSE;
 529             break;
 530         }
 531         new_path[len] = '\\';
 532     }
 533
 534     msi_free(new_path);
 535     return ret;
 536 }
 537
 538 void ui_progress(MSIPACKAGE *package, int a, int b, int c, int d )
 539 {
 540     MSIRECORD * row;
 541
 542     row = MSI_CreateRecord(4);
 543     MSI_RecordSetInteger(row,1,a);
 544     MSI_RecordSetInteger(row,2,b);
 545     MSI_RecordSetInteger(row,3,c);
 546     MSI_RecordSetInteger(row,4,d);
 547     MSI_ProcessMessage(package, INSTALLMESSAGE_PROGRESS, row);
 548     msiobj_release(&row->hdr);
 549
 550     msi_dialog_check_messages(NULL);
 551 }
 552
 553 void ui_actiondata(MSIPACKAGE *package, LPCWSTR action, MSIRECORD * record)
 554 {
 555     static const WCHAR Query_t[] =
 556         {'S','E','L','E','C','T',' ','*',' ','F','R','O','M',' ',
 557          '`','A','c','t','i','o', 'n','T','e','x','t','`',' ',
 558          'W','H','E','R','E',' ', '`','A','c','t','i','o','n','`',' ','=',
 559          ' ','\'','%','s','\'',0};
 560     WCHAR message[1024];
 561     MSIRECORD * row = 0;
 562     DWORD size;
 563
 564     if (!package->LastAction || strcmpW(package->LastAction, action))
 565     {
 566         row = MSI_QueryGetRecord(package->db, Query_t, action);
 567         if (!row)
 568             return;
 569
 570         if (MSI_RecordIsNull(row,3))
 571         {
 572             msiobj_release(&row->hdr);
 573             return;
 574         }
 575
 576         /* update the cached actionformat */
 577         msi_free(package->ActionFormat);
 578         package->ActionFormat = msi_dup_record_field(row,3);
 579
 580         msi_free(package->LastAction);
 581         package->LastAction = strdupW(action);
 582
 583         msiobj_release(&row->hdr);
 584     }
 585
 586     MSI_RecordSetStringW(record,0,package->ActionFormat);
 587     size = 1024;
 588     MSI_FormatRecordW(package,record,message,&size);
 589
 590     row = MSI_CreateRecord(1);
 591     MSI_RecordSetStringW(row,1,message);
 592
 593     MSI_ProcessMessage(package, INSTALLMESSAGE_ACTIONDATA, row);
 594
 595     msiobj_release(&row->hdr);
 596 }
 597
 598 void reduce_to_longfilename(WCHAR* filename)
 599 {
 600     LPWSTR p = strchrW(filename,'|');
 601     if (p)
 602         memmove(filename, p+1, (strlenW(p+1)+1)*sizeof(WCHAR));
 603 }
 604
 605 LPWSTR create_component_advertise_string(MSIPACKAGE* package,
 606                 MSICOMPONENT* component, LPCWSTR feature)
 607 {
 608     static const WCHAR fmt[] = {'%','s','%','s','%','c','%','s',0};
 609     WCHAR productid_85[21], component_85[21];
 610     LPWSTR output = NULL;
 611     DWORD sz = 0;
 612     GUID clsid;
 613
 614     /* > is used if there is a component GUID and < if not.  */
 615
 616     productid_85[0] = 0;
 617     component_85[0] = 0;
 618
 619     CLSIDFromString(package->ProductCode, &clsid);
 620     encode_base85_guid(&clsid, productid_85);
 621
 622     if (component)
 623     {
 624         CLSIDFromString(component->ComponentId, &clsid);
 625         encode_base85_guid(&clsid, component_85);
 626     }
 627
 628     TRACE("prod=%s feat=%s comp=%s\n", debugstr_w(productid_85),
 629           debugstr_w(feature), debugstr_w(component_85));
 630
 631     sz = 20 + lstrlenW(feature) + 20 + 3;
 632
 633     output = msi_alloc_zero(sz*sizeof(WCHAR));
 634
 635     sprintfW(output, fmt, productid_85, feature,
 636              component?'>':'<', component_85);
 637
 638     return output;
 639 }
 640
 641 /* update component state based on a feature change */
 642 void ACTION_UpdateComponentStates( MSIPACKAGE *package, MSIFEATURE *feature )
 643 {
 644     INSTALLSTATE newstate;
 645     ComponentList *cl;
 646
 647     newstate = feature->ActionRequest;
 648
 649     if (newstate == INSTALLSTATE_ABSENT)
 650         newstate = INSTALLSTATE_UNKNOWN;
 651
 652     LIST_FOR_EACH_ENTRY( cl, &feature->Components, ComponentList, entry )
 653     {
 654         MSICOMPONENT* component = cl->component;
 655
 656         if (!component->Enabled) continue;
 657
 658         TRACE("MODIFYING(%i): Component %s (Installed %i, Action %i, Request %i)\n",
 659             newstate, debugstr_w(component->Component), component->Installed,
 660             component->Action, component->ActionRequest);
 661
 662         if (newstate == INSTALLSTATE_LOCAL)
 663             msi_component_set_state(package, component, INSTALLSTATE_LOCAL);
 664         else
 665         {
 666             ComponentList *clist;
 667             MSIFEATURE *f;
 668
 669             component->hasLocalFeature = FALSE;
 670
 671             msi_component_set_state(package, component, newstate);
 672
 673             /*if any other feature wants is local we need to set it local*/
 674             LIST_FOR_EACH_ENTRY( f, &package->features, MSIFEATURE, entry )
 675             {
 676                 if ( f->ActionRequest != INSTALLSTATE_LOCAL &&
 677                      f->ActionRequest != INSTALLSTATE_SOURCE )
 678                 {
 679                     continue;
 680                 }
 681
 682                 LIST_FOR_EACH_ENTRY( clist, &f->Components, ComponentList, entry )
 683                 {
 684                     if ( clist->component == component &&
 685                          (f->ActionRequest == INSTALLSTATE_LOCAL ||
 686                           f->ActionRequest == INSTALLSTATE_SOURCE) )
 687                     {
 688                         TRACE("Saved by %s\n", debugstr_w(f->Feature));
 689                         component->hasLocalFeature = TRUE;
 690
 691                         if (component->Attributes & msidbComponentAttributesOptional)
 692                         {
 693                             if (f->Attributes & msidbFeatureAttributesFavorSource)
 694                                 msi_component_set_state(package, component, INSTALLSTATE_SOURCE);
 695                             else
 696                                 msi_component_set_state(package, component, INSTALLSTATE_LOCAL);
 697                         }
 698                         else if (component->Attributes & msidbComponentAttributesSourceOnly)
 699                             msi_component_set_state(package, component, INSTALLSTATE_SOURCE);
 700                         else
 701                             msi_component_set_state(package, component, INSTALLSTATE_LOCAL);
 702                     }
 703                 }
 704             }
 705         }
 706         TRACE("Result (%i): Component %s (Installed %i, Action %i, Request %i)\n",
 707             newstate, debugstr_w(component->Component), component->Installed,
 708             component->Action, component->ActionRequest);
 709     }
 710 }
 711
 712 UINT register_unique_action(MSIPACKAGE *package, LPCWSTR action)
 713 {
 714     UINT count;
 715     LPWSTR *newbuf = NULL;
 716
 717     if (!package->script)
 718         return FALSE;
 719
 720     TRACE("Registering %s as unique action\n", debugstr_w(action));
 721
 722     count = package->script->UniqueActionsCount;
 723     package->script->UniqueActionsCount++;
 724     if (count != 0)
 725         newbuf = msi_realloc( package->script->UniqueActions,
 726                         package->script->UniqueActionsCount* sizeof(LPWSTR));
 727     else
 728         newbuf = msi_alloc( sizeof(LPWSTR));
 729
 730     newbuf[count] = strdupW(action);
 731     package->script->UniqueActions = newbuf;
 732
 733     return ERROR_SUCCESS;
 734 }
 735
 736 BOOL check_unique_action(const MSIPACKAGE *package, LPCWSTR action)
 737 {
 738     UINT i;
 739
 740     if (!package->script)
 741         return FALSE;
 742
 743     for (i = 0; i < package->script->UniqueActionsCount; i++)
 744         if (!strcmpW(package->script->UniqueActions[i], action))
 745             return TRUE;
 746
 747     return FALSE;
 748 }
 749
 750 WCHAR* generate_error_string(MSIPACKAGE *package, UINT error, DWORD count, ... )
 751 {
 752     static const WCHAR query[] = {'S','E','L','E','C','T',' ','`','M','e','s','s','a','g','e','`',' ','F','R','O','M',' ','`','E','r','r','o','r','`',' ','W','H','E','R','E',' ','`','E','r','r','o','r','`',' ','=',' ','%','i',0};
 753
 754     MSIRECORD *rec;
 755     MSIRECORD *row;
 756     DWORD size = 0;
 757     DWORD i;
 758     va_list va;
 759     LPCWSTR str;
 760     LPWSTR data;
 761
 762     row = MSI_QueryGetRecord(package->db, query, error);
 763     if (!row)
 764         return 0;
 765
 766     rec = MSI_CreateRecord(count+2);
 767
 768     str = MSI_RecordGetString(row,1);
 769     MSI_RecordSetStringW(rec,0,str);
 770     msiobj_release( &row->hdr );
 771     MSI_RecordSetInteger(rec,1,error);
 772
 773     va_start(va,count);
 774     for (i = 0; i < count; i++)
 775     {
 776         str = va_arg(va,LPCWSTR);
 777         MSI_RecordSetStringW(rec,(i+2),str);
 778     }
 779     va_end(va);
 780
 781     MSI_FormatRecordW(package,rec,NULL,&size);
 782
 783     size++;
 784     data = msi_alloc(size*sizeof(WCHAR));
 785     if (size > 1)
 786         MSI_FormatRecordW(package,rec,data,&size);
 787     else
 788         data[0] = 0;
 789     msiobj_release( &rec->hdr );
 790     return data;
 791 }