git.oblomov.eu Git - wine/blob - dlls/version/info.c

   1 /*
   2  * Implementation of VERSION.DLL - Version Info access
   3  *
   4  * Copyright 1996,1997 Marcus Meissner
   5  * Copyright 1997 David Cuthbert
   6  * Copyright 1999 Ulrich Weigand
   7  */
   8
   9 #include <stdlib.h>
  10 #include <string.h>
  11
  12 #include "winreg.h"
  13 #include "winver.h"
  14 #include "wine/winuser16.h"
  15 #include "wine/unicode.h"
  16 #include "winerror.h"
  17 #include "debugtools.h"
  18
  19 DEFAULT_DEBUG_CHANNEL(ver);
  20
  21
  22 /******************************************************************************
  23  *
  24  *   This function will print via dprintf[_]ver to stddeb debug info regarding
  25  *   the file info structure vffi.
  26  *      15-Feb-1998 Dimitrie Paun (dimi@cs.toronto.edu)
  27  *      Added this function to clean up the code.
  28  *
  29  *****************************************************************************/
  30 static void print_vffi_debug(VS_FIXEDFILEINFO *vffi)
  31 {
  32         TRACE(" structversion=%u.%u, fileversion=%u.%u.%u.%u, productversion=%u.%u.%u.%u, flagmask=0x%lx, flags=%s%s%s%s%s%s\n",
  33                     HIWORD(vffi->dwStrucVersion),LOWORD(vffi->dwStrucVersion),
  34                     HIWORD(vffi->dwFileVersionMS),LOWORD(vffi->dwFileVersionMS),
  35                     HIWORD(vffi->dwFileVersionLS),LOWORD(vffi->dwFileVersionLS),
  36                     HIWORD(vffi->dwProductVersionMS),LOWORD(vffi->dwProductVersionMS),
  37                     HIWORD(vffi->dwProductVersionLS),LOWORD(vffi->dwProductVersionLS),
  38                     vffi->dwFileFlagsMask,
  39                     (vffi->dwFileFlags & VS_FF_DEBUG) ? "DEBUG," : "",
  40                     (vffi->dwFileFlags & VS_FF_PRERELEASE) ? "PRERELEASE," : "",
  41                     (vffi->dwFileFlags & VS_FF_PATCHED) ? "PATCHED," : "",
  42                     (vffi->dwFileFlags & VS_FF_PRIVATEBUILD) ? "PRIVATEBUILD," : "",
  43                     (vffi->dwFileFlags & VS_FF_INFOINFERRED) ? "INFOINFERRED," : "",
  44                     (vffi->dwFileFlags & VS_FF_SPECIALBUILD) ? "SPECIALBUILD," : ""
  45                     );
  46
  47         TRACE("(");
  48         DPRINTF(" OS=0x%x.0x%x ",
  49                 HIWORD(vffi->dwFileOS),
  50                 LOWORD(vffi->dwFileOS)
  51         );
  52         switch (vffi->dwFileOS&0xFFFF0000) {
  53         case VOS_DOS:DPRINTF("DOS,");break;
  54         case VOS_OS216:DPRINTF("OS/2-16,");break;
  55         case VOS_OS232:DPRINTF("OS/2-32,");break;
  56         case VOS_NT:DPRINTF("NT,");break;
  57         case VOS_UNKNOWN:
  58         default:
  59                 DPRINTF("UNKNOWN(0x%lx),",vffi->dwFileOS&0xFFFF0000);break;
  60         }
  61         switch (LOWORD(vffi->dwFileOS)) {
  62         case VOS__BASE:DPRINTF("BASE");break;
  63         case VOS__WINDOWS16:DPRINTF("WIN16");break;
  64         case VOS__WINDOWS32:DPRINTF("WIN32");break;
  65         case VOS__PM16:DPRINTF("PM16");break;
  66         case VOS__PM32:DPRINTF("PM32");break;
  67         default:DPRINTF("UNKNOWN(0x%x)",LOWORD(vffi->dwFileOS));break;
  68         }
  69         DPRINTF(")\n");
  70
  71         switch (vffi->dwFileType) {
  72         default:
  73         case VFT_UNKNOWN:
  74                 TRACE("filetype=Unknown(0x%lx)",vffi->dwFileType);
  75                 break;
  76         case VFT_APP:TRACE("filetype=APP,");break;
  77         case VFT_DLL:TRACE("filetype=DLL,");break;
  78         case VFT_DRV:
  79                 TRACE("filetype=DRV,");
  80                 switch(vffi->dwFileSubtype) {
  81                 default:
  82                 case VFT2_UNKNOWN:
  83                         DPRINTF("UNKNOWN(0x%lx)",vffi->dwFileSubtype);
  84                         break;
  85                 case VFT2_DRV_PRINTER:
  86                         DPRINTF("PRINTER");
  87                         break;
  88                 case VFT2_DRV_KEYBOARD:
  89                         DPRINTF("KEYBOARD");
  90                         break;
  91                 case VFT2_DRV_LANGUAGE:
  92                         DPRINTF("LANGUAGE");
  93                         break;
  94                 case VFT2_DRV_DISPLAY:
  95                         DPRINTF("DISPLAY");
  96                         break;
  97                 case VFT2_DRV_MOUSE:
  98                         DPRINTF("MOUSE");
  99                         break;
 100                 case VFT2_DRV_NETWORK:
 101                         DPRINTF("NETWORK");
 102                         break;
 103                 case VFT2_DRV_SYSTEM:
 104                         DPRINTF("SYSTEM");
 105                         break;
 106                 case VFT2_DRV_INSTALLABLE:
 107                         DPRINTF("INSTALLABLE");
 108                         break;
 109                 case VFT2_DRV_SOUND:
 110                         DPRINTF("SOUND");
 111                         break;
 112                 case VFT2_DRV_COMM:
 113                         DPRINTF("COMM");
 114                         break;
 115                 case VFT2_DRV_INPUTMETHOD:
 116                         DPRINTF("INPUTMETHOD");
 117                         break;
 118                 }
 119                 break;
 120         case VFT_FONT:
 121                 TRACE("filetype=FONT.");
 122                 switch (vffi->dwFileSubtype) {
 123                 default:
 124                         DPRINTF("UNKNOWN(0x%lx)",vffi->dwFileSubtype);
 125                         break;
 126                 case VFT2_FONT_RASTER:DPRINTF("RASTER");break;
 127                 case VFT2_FONT_VECTOR:DPRINTF("VECTOR");break;
 128                 case VFT2_FONT_TRUETYPE:DPRINTF("TRUETYPE");break;
 129                 }
 130                 break;
 131         case VFT_VXD:TRACE("filetype=VXD");break;
 132         case VFT_STATIC_LIB:TRACE("filetype=STATIC_LIB");break;
 133         }
 134         DPRINTF("\n");
 135         TRACE("  filedata=0x%lx.0x%lx\n",
 136                     vffi->dwFileDateMS,vffi->dwFileDateLS);
 137 }
 138
 139
 140 /***********************************************************************
 141  * Version Info Structure
 142  */
 143
 144 typedef struct
 145 {
 146     WORD  wLength;
 147     WORD  wValueLength;
 148     CHAR  szKey[1];
 149 #if 0   /* variable length structure */
 150     /* DWORD aligned */
 151     BYTE  Value[];
 152     /* DWORD aligned */
 153     VS_VERSION_INFO_STRUCT16 Children[];
 154 #endif
 155 } VS_VERSION_INFO_STRUCT16;
 156
 157 typedef struct
 158 {
 159     WORD  wLength;
 160     WORD  wValueLength;
 161     WORD  bText;
 162     WCHAR szKey[1];
 163 #if 0   /* variable length structure */
 164     /* DWORD aligned */
 165     BYTE  Value[];
 166     /* DWORD aligned */
 167     VS_VERSION_INFO_STRUCT32 Children[];
 168 #endif
 169 } VS_VERSION_INFO_STRUCT32;
 170
 171 #define VersionInfoIs16( ver ) \
 172     ( ((VS_VERSION_INFO_STRUCT16 *)ver)->szKey[0] >= ' ' )
 173
 174 #define DWORD_ALIGN( base, ptr ) \
 175     ( (LPBYTE)(base) + ((((LPBYTE)(ptr) - (LPBYTE)(base)) + 3) & ~3) )
 176
 177 #define VersionInfo16_Value( ver )  \
 178     DWORD_ALIGN( (ver), (ver)->szKey + strlen((ver)->szKey) + 1 )
 179 #define VersionInfo32_Value( ver )  \
 180     DWORD_ALIGN( (ver), (ver)->szKey + strlenW((ver)->szKey) + 1 )
 181
 182 #define VersionInfo16_Children( ver )  \
 183     (VS_VERSION_INFO_STRUCT16 *)( VersionInfo16_Value( ver ) + \
 184                            ( ( (ver)->wValueLength + 3 ) & ~3 ) )
 185 #define VersionInfo32_Children( ver )  \
 186     (VS_VERSION_INFO_STRUCT32 *)( VersionInfo32_Value( ver ) + \
 187                            ( ( (ver)->wValueLength * \
 188                                ((ver)->bText? 2 : 1) + 3 ) & ~3 ) )
 189
 190 #define VersionInfo16_Next( ver ) \
 191     (VS_VERSION_INFO_STRUCT16 *)( (LPBYTE)ver + (((ver)->wLength + 3) & ~3) )
 192 #define VersionInfo32_Next( ver ) \
 193     (VS_VERSION_INFO_STRUCT32 *)( (LPBYTE)ver + (((ver)->wLength + 3) & ~3) )
 194
 195 /***********************************************************************
 196  *           ConvertVersionInfo32To16        [internal]
 197  */
 198 void ConvertVersionInfo32To16( VS_VERSION_INFO_STRUCT32 *info32,
 199                                VS_VERSION_INFO_STRUCT16 *info16 )
 200 {
 201     /* Copy data onto local stack to prevent overwrites */
 202     WORD wLength = info32->wLength;
 203     WORD wValueLength = info32->wValueLength;
 204     WORD bText = info32->bText;
 205     LPBYTE lpValue = VersionInfo32_Value( info32 );
 206     VS_VERSION_INFO_STRUCT32 *child32 = VersionInfo32_Children( info32 );
 207     VS_VERSION_INFO_STRUCT16 *child16;
 208
 209     TRACE("Converting %p to %p\n", info32, info16 );
 210     TRACE("wLength %d, wValueLength %d, bText %d, value %p, child %p\n",
 211                 wLength, wValueLength, bText, lpValue, child32 );
 212
 213     /* Convert key */
 214     WideCharToMultiByte( CP_ACP, 0, info32->szKey, -1, info16->szKey, 0x7fffffff, NULL, NULL );
 215
 216     TRACE("Copied key from %p to %p: %s\n", info32->szKey, info16->szKey,
 217                 debugstr_a(info16->szKey) );
 218
 219     /* Convert value */
 220     if ( wValueLength == 0 )
 221     {
 222         info16->wValueLength = 0;
 223         TRACE("No value present\n" );
 224     }
 225     else if ( bText )
 226     {
 227         info16->wValueLength = WideCharToMultiByte( CP_ACP, 0, (LPCWSTR)lpValue, -1, NULL, 0, NULL, NULL );
 228         WideCharToMultiByte( CP_ACP, 0, (LPCWSTR)lpValue, -1,
 229                              VersionInfo16_Value( info16 ), info16->wValueLength, NULL, NULL );
 230
 231         TRACE("Copied value from %p to %p: %s\n", lpValue,
 232                     VersionInfo16_Value( info16 ),
 233                     debugstr_a(VersionInfo16_Value( info16 )) );
 234     }
 235     else
 236     {
 237         info16->wValueLength = wValueLength;
 238         memmove( VersionInfo16_Value( info16 ), lpValue, wValueLength );
 239
 240         TRACE("Copied value from %p to %p: %d bytes\n", lpValue,
 241                      VersionInfo16_Value( info16 ), wValueLength );
 242     }
 243
 244     /* Convert children */
 245     child16 = VersionInfo16_Children( info16 );
 246     while ( (DWORD)child32 < (DWORD)info32 + wLength )
 247     {
 248         VS_VERSION_INFO_STRUCT32 *nextChild = VersionInfo32_Next( child32 );
 249
 250         ConvertVersionInfo32To16( child32, child16 );
 251
 252         child16 = VersionInfo16_Next( child16 );
 253         child32 = nextChild;
 254     }
 255
 256     /* Fixup length */
 257     info16->wLength = (DWORD)child16 - (DWORD)info16;
 258
 259     TRACE("Finished, length is %d (%p - %p)\n",
 260                 info16->wLength, info16, child16 );
 261 }
 262
 263 /***********************************************************************
 264  *           VERSION_GetFileVersionInfo_PE             [internal]
 265  *
 266  *    NOTE: returns size of the PE VERSION resource.
 267  *    FIXME: handle is not used.
 268  */
 269 static DWORD WINAPI VERSION_GetFileVersionInfo_PE( LPCSTR filename, LPDWORD handle,
 270                                     DWORD datasize, LPVOID data )
 271 {
 272     VS_FIXEDFILEINFO *vffi;
 273     DWORD len;
 274     BYTE *buf;
 275     HMODULE hModule;
 276     HRSRC hRsrc;
 277     HGLOBAL hMem;
 278     BOOL do_free_library = FALSE;
 279
 280     TRACE("(%s,%p)\n", debugstr_a(filename), handle );
 281
 282     hModule = GetModuleHandleA(filename);
 283     if(!hModule)
 284     {
 285         hModule = LoadLibraryExA(filename, 0, LOAD_LIBRARY_AS_DATAFILE);
 286         do_free_library = TRUE;
 287     }
 288     if(!hModule)
 289     {
 290         WARN("Could not load %s\n", debugstr_a(filename));
 291         return 0;
 292     }
 293     hRsrc = FindResourceW(hModule,
 294                           MAKEINTRESOURCEW(VS_VERSION_INFO),
 295                           MAKEINTRESOURCEW(VS_FILE_INFO));
 296     if(!hRsrc)
 297     {
 298         WARN("Could not find VS_VERSION_INFO in %s\n", debugstr_a(filename));
 299         if(do_free_library) FreeLibrary(hModule);
 300         return 0;
 301     }
 302     len = SizeofResource(hModule, hRsrc);
 303     hMem = LoadResource(hModule, hRsrc);
 304     if(!hMem)
 305     {
 306         WARN("Could not load VS_VERSION_INFO from %s\n", debugstr_a(filename));
 307         if(do_free_library) FreeLibrary(hModule);
 308         return 0;
 309     }
 310     buf = LockResource(hMem);
 311
 312     vffi = (VS_FIXEDFILEINFO *)VersionInfo32_Value( (VS_VERSION_INFO_STRUCT32 *)buf );
 313
 314     if ( vffi->dwSignature != VS_FFI_SIGNATURE )
 315     {
 316         WARN("vffi->dwSignature is 0x%08lx, but not 0x%08lx!\n",
 317                    vffi->dwSignature, VS_FFI_SIGNATURE );
 318         len = 0;
 319         goto END;
 320     }
 321
 322     if ( TRACE_ON(ver) )
 323         print_vffi_debug( vffi );
 324
 325     if(data)
 326     {
 327         if(datasize >= len)
 328             memcpy(data, buf, len);
 329         else
 330             len = 0;
 331     }
 332 END:
 333     FreeResource(hMem);
 334     if(do_free_library) FreeLibrary(hModule);
 335
 336     return len;
 337 }
 338
 339 /***********************************************************************
 340  *           VERSION_GetFileVersionInfo_16             [internal]
 341  *
 342  *    NOTE: returns size of the 16-bit VERSION resource.
 343  *    FIXME: handle is not used.
 344  */
 345 static DWORD WINAPI VERSION_GetFileVersionInfo_16( LPCSTR filename, LPDWORD handle,
 346                                     DWORD datasize, LPVOID data )
 347 {
 348     VS_FIXEDFILEINFO *vffi;
 349     DWORD len;
 350     BYTE *buf;
 351     HMODULE16 hModule;
 352     HRSRC16 hRsrc;
 353     HGLOBAL16 hMem;
 354     BOOL do_free_library = FALSE;
 355
 356     TRACE("(%s,%p)\n", debugstr_a(filename), handle );
 357
 358     hModule = GetModuleHandle16(filename);
 359     if(hModule < 32)
 360     {
 361         hModule = LoadLibrary16(filename);
 362         do_free_library = TRUE;
 363     }
 364     if(hModule < 32)
 365     {
 366         WARN("Could not load %s\n", debugstr_a(filename));
 367         return 0;
 368     }
 369     hRsrc = FindResource16(hModule,
 370                           MAKEINTRESOURCEA(VS_VERSION_INFO),
 371                           MAKEINTRESOURCEA(VS_FILE_INFO));
 372     if(!hRsrc)
 373     {
 374         WARN("Could not find VS_VERSION_INFO in %s\n", debugstr_a(filename));
 375         if(do_free_library) FreeLibrary16(hModule);
 376         return 0;
 377     }
 378     len = SizeofResource16(hModule, hRsrc);
 379     hMem = LoadResource16(hModule, hRsrc);
 380     if(!hMem)
 381     {
 382         WARN("Could not load VS_VERSION_INFO from %s\n", debugstr_a(filename));
 383         if(do_free_library) FreeLibrary16(hModule);
 384         return 0;
 385     }
 386     buf = LockResource16(hMem);
 387
 388     if(!VersionInfoIs16(buf))
 389         goto END;
 390
 391     vffi = (VS_FIXEDFILEINFO *)VersionInfo16_Value( (VS_VERSION_INFO_STRUCT16 *)buf );
 392
 393     if ( vffi->dwSignature != VS_FFI_SIGNATURE )
 394     {
 395         WARN("vffi->dwSignature is 0x%08lx, but not 0x%08lx!\n",
 396                    vffi->dwSignature, VS_FFI_SIGNATURE );
 397         len = 0;
 398         goto END;
 399     }
 400
 401     if ( TRACE_ON(ver) )
 402         print_vffi_debug( vffi );
 403
 404     if(data)
 405     {
 406         if(datasize >= len)
 407             memcpy(data, buf, len);
 408         else
 409             len = 0;
 410     }
 411 END:
 412     FreeResource16(hMem);
 413     if(do_free_library) FreeLibrary16(hModule);
 414
 415     return len;
 416 }
 417
 418 /***********************************************************************
 419  *           GetFileVersionInfoSizeA         [VERSION.2]
 420  */
 421 DWORD WINAPI GetFileVersionInfoSizeA( LPCSTR filename, LPDWORD handle )
 422 {
 423     VS_FIXEDFILEINFO *vffi;
 424     DWORD len, ret, offset;
 425     BYTE buf[144];
 426
 427     TRACE("(%s,%p)\n", debugstr_a(filename), handle );
 428
 429     len = VERSION_GetFileVersionInfo_PE(filename, handle, 0, NULL);
 430     if(len) return len;
 431     len = VERSION_GetFileVersionInfo_16(filename, handle, 0, NULL);
 432     if(len) return len;
 433
 434     len = GetFileResourceSize16( filename,
 435                                  MAKEINTRESOURCEA(VS_FILE_INFO),
 436                                  MAKEINTRESOURCEA(VS_VERSION_INFO),
 437                                  &offset );
 438     if (!len) return 0;
 439
 440     ret = GetFileResource16( filename,
 441                              MAKEINTRESOURCEA(VS_FILE_INFO),
 442                              MAKEINTRESOURCEA(VS_VERSION_INFO),
 443                              offset, sizeof( buf ), buf );
 444     if (!ret) return 0;
 445
 446     if ( handle ) *handle = offset;
 447
 448     if ( VersionInfoIs16( buf ) )
 449         vffi = (VS_FIXEDFILEINFO *)VersionInfo16_Value( (VS_VERSION_INFO_STRUCT16 *)buf );
 450     else
 451         vffi = (VS_FIXEDFILEINFO *)VersionInfo32_Value( (VS_VERSION_INFO_STRUCT32 *)buf );
 452
 453     if ( vffi->dwSignature != VS_FFI_SIGNATURE )
 454     {
 455         WARN("vffi->dwSignature is 0x%08lx, but not 0x%08lx!\n",
 456                    vffi->dwSignature, VS_FFI_SIGNATURE );
 457         return 0;
 458     }
 459
 460     if ( ((VS_VERSION_INFO_STRUCT16 *)buf)->wLength < len )
 461         len = ((VS_VERSION_INFO_STRUCT16 *)buf)->wLength;
 462
 463     if ( TRACE_ON(ver) )
 464         print_vffi_debug( vffi );
 465
 466     return len;
 467 }
 468
 469 /***********************************************************************
 470  *           GetFileVersionInfoSizeW         [VERSION.3]
 471  */
 472 DWORD WINAPI GetFileVersionInfoSizeW( LPCWSTR filename, LPDWORD handle )
 473 {
 474     DWORD ret, len = WideCharToMultiByte( CP_ACP, 0, filename, -1, NULL, 0, NULL, NULL );
 475     LPSTR fn = HeapAlloc( GetProcessHeap(), 0, len );
 476     WideCharToMultiByte( CP_ACP, 0, filename, -1, fn, len, NULL, NULL );
 477     ret = GetFileVersionInfoSizeA( fn, handle );
 478     HeapFree( GetProcessHeap(), 0, fn );
 479     return ret;
 480 }
 481
 482 /***********************************************************************
 483  *           GetFileVersionInfoA             [VERSION.1]
 484  */
 485 DWORD WINAPI GetFileVersionInfoA( LPCSTR filename, DWORD handle,
 486                                     DWORD datasize, LPVOID data )
 487 {
 488     TRACE("(%s,%ld,size=%ld,data=%p)\n",
 489                 debugstr_a(filename), handle, datasize, data );
 490
 491     if(VERSION_GetFileVersionInfo_PE(filename, &handle, datasize, data))
 492         goto DO_CONVERT;
 493     if(VERSION_GetFileVersionInfo_16(filename, &handle, datasize, data))
 494         goto DO_CONVERT;
 495
 496     if ( !GetFileResource16( filename, MAKEINTRESOURCEA(VS_FILE_INFO),
 497                                        MAKEINTRESOURCEA(VS_VERSION_INFO),
 498                                        handle, datasize, data ) )
 499         return FALSE;
 500 DO_CONVERT:
 501     if (    datasize >= sizeof(VS_VERSION_INFO_STRUCT16)
 502          && datasize >= ((VS_VERSION_INFO_STRUCT16 *)data)->wLength
 503          && !VersionInfoIs16( data ) )
 504     {
 505         /* convert resource from PE format to NE format */
 506         ConvertVersionInfo32To16( (VS_VERSION_INFO_STRUCT32 *)data,
 507                                   (VS_VERSION_INFO_STRUCT16 *)data );
 508     }
 509
 510     return TRUE;
 511 }
 512
 513 /***********************************************************************
 514  *           GetFileVersionInfoW             [VERSION.4]
 515  */
 516 DWORD WINAPI GetFileVersionInfoW( LPCWSTR filename, DWORD handle,
 517                                     DWORD datasize, LPVOID data )
 518 {
 519     DWORD len = WideCharToMultiByte( CP_ACP, 0, filename, -1, NULL, 0, NULL, NULL );
 520     LPSTR fn = HeapAlloc( GetProcessHeap(), 0, len );
 521     DWORD retv = TRUE;
 522
 523     WideCharToMultiByte( CP_ACP, 0, filename, -1, fn, len, NULL, NULL );
 524
 525     TRACE("(%s,%ld,size=%ld,data=%p)\n",
 526                 debugstr_w(filename), handle, datasize, data );
 527
 528     if(VERSION_GetFileVersionInfo_PE(fn, &handle, datasize, data))
 529         goto END;
 530     if(VERSION_GetFileVersionInfo_16(fn, &handle, datasize, data))
 531         goto END;
 532
 533     if ( !GetFileResource16( fn, MAKEINTRESOURCEA(VS_FILE_INFO),
 534                                  MAKEINTRESOURCEA(VS_VERSION_INFO),
 535                                  handle, datasize, data ) )
 536         retv = FALSE;
 537
 538     else if (    datasize >= sizeof(VS_VERSION_INFO_STRUCT16)
 539               && datasize >= ((VS_VERSION_INFO_STRUCT16 *)data)->wLength
 540               && VersionInfoIs16( data ) )
 541     {
 542         ERR("Cannot access NE resource in %s\n", debugstr_a(fn) );
 543         retv =  FALSE;
 544     }
 545 END:
 546     HeapFree( GetProcessHeap(), 0, fn );
 547     return retv;
 548 }
 549
 550
 551 /***********************************************************************
 552  *           VersionInfo16_FindChild             [internal]
 553  */
 554 static VS_VERSION_INFO_STRUCT16 *VersionInfo16_FindChild( VS_VERSION_INFO_STRUCT16 *info,
 555                                             LPCSTR szKey, UINT cbKey )
 556 {
 557     VS_VERSION_INFO_STRUCT16 *child = VersionInfo16_Children( info );
 558
 559     while ( (DWORD)child < (DWORD)info + info->wLength )
 560     {
 561         if ( !strncasecmp( child->szKey, szKey, cbKey ) )
 562             return child;
 563
 564         if (!(child->wLength)) return NULL;
 565         child = VersionInfo16_Next( child );
 566     }
 567
 568     return NULL;
 569 }
 570
 571 /***********************************************************************
 572  *           VersionInfo32_FindChild             [internal]
 573  */
 574 static VS_VERSION_INFO_STRUCT32 *VersionInfo32_FindChild( VS_VERSION_INFO_STRUCT32 *info,
 575                                             LPCWSTR szKey, UINT cbKey )
 576 {
 577     VS_VERSION_INFO_STRUCT32 *child = VersionInfo32_Children( info );
 578
 579     while ( (DWORD)child < (DWORD)info + info->wLength )
 580     {
 581         if ( !strncmpiW( child->szKey, szKey, cbKey ) )
 582             return child;
 583
 584         child = VersionInfo32_Next( child );
 585     }
 586
 587     return NULL;
 588 }
 589
 590 /***********************************************************************
 591  *           VerQueryValueA              [VERSION.12]
 592  */
 593 DWORD WINAPI VerQueryValueA( LPVOID pBlock, LPCSTR lpSubBlock,
 594                                LPVOID *lplpBuffer, UINT *puLen )
 595 {
 596     VS_VERSION_INFO_STRUCT16 *info = (VS_VERSION_INFO_STRUCT16 *)pBlock;
 597     if ( !VersionInfoIs16( info ) )
 598     {
 599         INT len;
 600         LPWSTR wide_str;
 601         DWORD give;
 602
 603         /* <lawson_whitney@juno.com> Feb 2001 */
 604         /* AOL 5.0 does this, expecting to get this: */
 605         len = MultiByteToWideChar(CP_ACP, 0, lpSubBlock, -1, NULL, 0);
 606         wide_str = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));
 607         MultiByteToWideChar(CP_ACP, 0, lpSubBlock, -1, wide_str, len);
 608
 609         give = VerQueryValueW(pBlock, wide_str, lplpBuffer, puLen);
 610         HeapFree(GetProcessHeap(), 0, wide_str);
 611         return give;
 612     }
 613
 614     TRACE("(%p,%s,%p,%p)\n",
 615                 pBlock, debugstr_a(lpSubBlock), lplpBuffer, puLen );
 616
 617     while ( *lpSubBlock )
 618     {
 619         /* Find next path component */
 620         LPCSTR lpNextSlash;
 621         for ( lpNextSlash = lpSubBlock; *lpNextSlash; lpNextSlash++ )
 622             if ( *lpNextSlash == '\\' )
 623                 break;
 624
 625         /* Skip empty components */
 626         if ( lpNextSlash == lpSubBlock )
 627         {
 628             lpSubBlock++;
 629             continue;
 630         }
 631
 632         /* We have a non-empty component: search info for key */
 633         info = VersionInfo16_FindChild( info, lpSubBlock, lpNextSlash-lpSubBlock );
 634         if ( !info ) return FALSE;
 635
 636         /* Skip path component */
 637         lpSubBlock = lpNextSlash;
 638     }
 639
 640     /* Return value */
 641     *lplpBuffer = VersionInfo16_Value( info );
 642     *puLen = info->wValueLength;
 643
 644     return TRUE;
 645 }
 646
 647 /***********************************************************************
 648  *           VerQueryValueW              [VERSION.13]
 649  */
 650 DWORD WINAPI VerQueryValueW( LPVOID pBlock, LPCWSTR lpSubBlock,
 651                                LPVOID *lplpBuffer, UINT *puLen )
 652 {
 653     VS_VERSION_INFO_STRUCT32 *info = (VS_VERSION_INFO_STRUCT32 *)pBlock;
 654     if ( VersionInfoIs16( info ) )
 655     {
 656         ERR("called on NE resource!\n" );
 657         return FALSE;
 658     }
 659
 660     TRACE("(%p,%s,%p,%p)\n",
 661                 pBlock, debugstr_w(lpSubBlock), lplpBuffer, puLen );
 662
 663     while ( *lpSubBlock )
 664     {
 665         /* Find next path component */
 666         LPCWSTR lpNextSlash;
 667         for ( lpNextSlash = lpSubBlock; *lpNextSlash; lpNextSlash++ )
 668             if ( *lpNextSlash == '\\' )
 669                 break;
 670
 671         /* Skip empty components */
 672         if ( lpNextSlash == lpSubBlock )
 673         {
 674             lpSubBlock++;
 675             continue;
 676         }
 677
 678         /* We have a non-empty component: search info for key */
 679         info = VersionInfo32_FindChild( info, lpSubBlock, lpNextSlash-lpSubBlock );
 680         if ( !info ) return FALSE;
 681
 682         /* Skip path component */
 683         lpSubBlock = lpNextSlash;
 684     }
 685
 686     /* Return value */
 687     *lplpBuffer = VersionInfo32_Value( info );
 688     *puLen = info->wValueLength;
 689
 690     return TRUE;
 691 }
 692