windows/class.c

   1 /*
   2  * Window classes functions
   3  *
   4  * Copyright 1993, 1996 Alexandre Julliard
   5  *
   6  * FIXME: In win32 all classes are local. They are registered at
   7  *        program start. Processes CANNOT share classes. (Source: some
   8  *        win31->NT migration book)
   9  */
  10
  11 #include <stdlib.h>
  12 #include <stdio.h>
  13 #include <string.h>
  14 #include "class.h"
  15 #include "heap.h"
  16 #include "win.h"
  17 #include "dce.h"
  18 #include "atom.h"
  19 #include "ldt.h"
  20 #include "toolhelp.h"
  21 #include "winproc.h"
  22 #include "stddebug.h"
  23 #include "debug.h"
  24
  25
  26 static CLASS *firstClass = NULL;
  27
  28
  29 /***********************************************************************
  30  *           CLASS_DumpClass
  31  *
  32  * Dump the content of a class structure to stderr.
  33  */
  34 void CLASS_DumpClass( CLASS *ptr )
  35 {
  36     char className[80];
  37     int i;
  38
  39     if (ptr->magic != CLASS_MAGIC)
  40     {
  41         fprintf( stderr, "%p is not a class\n", ptr );
  42         return;
  43     }
  44
  45     GlobalGetAtomName32A( ptr->atomName, className, sizeof(className) );
  46
  47     fprintf( stderr, "Class %p:\n", ptr );
  48     fprintf( stderr,
  49              "next=%p  name=%04x '%s'  style=%08x  wndProc=%08x\n"
  50              "inst=%04x  dce=%08x  icon=%04x  cursor=%04x  bkgnd=%04x\n"
  51              "clsExtra=%d  winExtra=%d  #windows=%d\n",
  52              ptr->next, ptr->atomName, className, ptr->style,
  53              (UINT32)ptr->winproc, ptr->hInstance, (UINT32)ptr->dce,
  54              ptr->hIcon, ptr->hCursor, ptr->hbrBackground,
  55              ptr->cbClsExtra, ptr->cbWndExtra, ptr->cWindows );
  56     if (ptr->cbClsExtra)
  57     {
  58         fprintf( stderr, "extra bytes:" );
  59         for (i = 0; i < ptr->cbClsExtra; i++)
  60             fprintf( stderr, " %02x", *((BYTE *)ptr->wExtra+i) );
  61         fprintf( stderr, "\n" );
  62     }
  63     fprintf( stderr, "\n" );
  64 }
  65
  66
  67 /***********************************************************************
  68  *           CLASS_WalkClasses
  69  *
  70  * Walk the class list and print each class on stderr.
  71  */
  72 void CLASS_WalkClasses(void)
  73 {
  74     CLASS *ptr;
  75     char className[80];
  76
  77     fprintf( stderr, " Class   Name                  Style   WndProc\n" );
  78     for (ptr = firstClass; ptr; ptr = ptr->next)
  79     {
  80         GlobalGetAtomName32A( ptr->atomName, className, sizeof(className) );
  81         fprintf( stderr, "%08x %-20.20s %08x %08x\n", (UINT32)ptr, className,
  82                  ptr->style, (UINT32)ptr->winproc );
  83     }
  84     fprintf( stderr, "\n" );
  85 }
  86
  87
  88 /***********************************************************************
  89  *           CLASS_GetMenuNameA
  90  *
  91  * Get the menu name as a ASCII string.
  92  */
  93 static LPSTR CLASS_GetMenuNameA( CLASS *classPtr )
  94 {
  95     if (!classPtr->menuNameA && classPtr->menuNameW)
  96     {
  97         /* We need to copy the Unicode string */
  98         classPtr->menuNameA = SEGPTR_STRDUP_WtoA( classPtr->menuNameW );
  99     }
 100     return classPtr->menuNameA;
 101 }
 102
 103
 104 /***********************************************************************
 105  *           CLASS_GetMenuNameW
 106  *
 107  * Get the menu name as a Unicode string.
 108  */
 109 static LPWSTR CLASS_GetMenuNameW( CLASS *classPtr )
 110 {
 111     if (!classPtr->menuNameW && classPtr->menuNameA)
 112     {
 113         if (!HIWORD(classPtr->menuNameA))
 114             return (LPWSTR)classPtr->menuNameA;
 115         /* Now we need to copy the ASCII string */
 116         classPtr->menuNameW = HEAP_strdupAtoW( SystemHeap, 0,
 117                                                classPtr->menuNameA );
 118     }
 119     return classPtr->menuNameW;
 120 }
 121
 122
 123 /***********************************************************************
 124  *           CLASS_SetMenuNameA
 125  *
 126  * Set the menu name in a class structure by copying the string.
 127  */
 128 static void CLASS_SetMenuNameA( CLASS *classPtr, LPCSTR name )
 129 {
 130     if (HIWORD(classPtr->menuNameA)) SEGPTR_FREE( classPtr->menuNameA );
 131     if (classPtr->menuNameW) HeapFree( SystemHeap, 0, classPtr->menuNameW );
 132     classPtr->menuNameA = SEGPTR_STRDUP( name );
 133     classPtr->menuNameW = 0;
 134 }
 135
 136
 137 /***********************************************************************
 138  *           CLASS_SetMenuNameW
 139  *
 140  * Set the menu name in a class structure by copying the string.
 141  */
 142 static void CLASS_SetMenuNameW( CLASS *classPtr, LPCWSTR name )
 143 {
 144     if (!HIWORD(name))
 145     {
 146         CLASS_SetMenuNameA( classPtr, (LPCSTR)name );
 147         return;
 148     }
 149     if (HIWORD(classPtr->menuNameA)) SEGPTR_FREE( classPtr->menuNameA );
 150     if (classPtr->menuNameW) HeapFree( SystemHeap, 0, classPtr->menuNameW );
 151     if ((classPtr->menuNameW = HeapAlloc( SystemHeap, 0,
 152                                          (lstrlen32W(name)+1)*sizeof(WCHAR) )))
 153         lstrcpy32W( classPtr->menuNameW, name );
 154     classPtr->menuNameA = 0;
 155 }
 156
 157
 158 /***********************************************************************
 159  *           CLASS_FreeClass
 160  *
 161  * Free a class structure.
 162  */
 163 static BOOL32 CLASS_FreeClass( CLASS *classPtr )
 164 {
 165     CLASS **ppClass;
 166
 167     /* Check if we can remove this class */
 168
 169     if (classPtr->cWindows > 0) return FALSE;
 170
 171     /* Remove the class from the linked list */
 172
 173     for (ppClass = &firstClass; *ppClass; ppClass = &(*ppClass)->next)
 174         if (*ppClass == classPtr) break;
 175     if (!*ppClass)
 176     {
 177         fprintf(stderr, "ERROR: Class list corrupted\n" );
 178         return FALSE;
 179     }
 180     *ppClass = classPtr->next;
 181
 182     /* Delete the class */
 183
 184     if (classPtr->dce) DCE_FreeDCE( classPtr->dce );
 185     if (classPtr->hbrBackground) DeleteObject32( classPtr->hbrBackground );
 186     GlobalDeleteAtom( classPtr->atomName );
 187     CLASS_SetMenuNameA( classPtr, NULL );
 188     WINPROC_FreeProc( classPtr->winproc, WIN_PROC_CLASS );
 189     HeapFree( SystemHeap, 0, classPtr );
 190     return TRUE;
 191 }
 192
 193
 194 /***********************************************************************
 195  *           CLASS_FreeModuleClasses
 196  */
 197 void CLASS_FreeModuleClasses( HMODULE16 hModule )
 198 {
 199     CLASS *ptr, *next;
 200
 201     for (ptr = firstClass; ptr; ptr = next)
 202     {
 203         next = ptr->next;
 204         if (ptr->hInstance == hModule) CLASS_FreeClass( ptr );
 205     }
 206 }
 207
 208
 209 /***********************************************************************
 210  *           CLASS_FindClassByAtom
 211  *
 212  * Return a pointer to the class.
 213  */
 214 CLASS *CLASS_FindClassByAtom( ATOM atom, HINSTANCE16 hinstance )
 215 {
 216     CLASS * class;
 217
 218     if (hinstance != 0xffff) hinstance = GetExePtr(hinstance);
 219
 220       /* First search task-specific classes */
 221
 222     for (class = firstClass; (class); class = class->next)
 223     {
 224         if (class->style & CS_GLOBALCLASS) continue;
 225         if ((class->atomName == atom) &&
 226             ((hinstance == 0xffff) ||
 227              (hinstance == class->hInstance))) return class;
 228     }
 229
 230       /* Then search global classes */
 231
 232     for (class = firstClass; (class); class = class->next)
 233     {
 234         if (!(class->style & CS_GLOBALCLASS)) continue;
 235         if (class->atomName == atom) return class;
 236     }
 237
 238     return 0;
 239 }
 240
 241
 242 /***********************************************************************
 243  *           CLASS_RegisterClass
 244  *
 245  * The real RegisterClass() functionality.
 246  */
 247 static CLASS *CLASS_RegisterClass( ATOM atom, HINSTANCE32 hInstance,
 248                                    DWORD style, INT32 classExtra,
 249                                    INT32 winExtra, WNDPROC16 wndProc,
 250                                    WINDOWPROCTYPE wndProcType )
 251 {
 252     CLASS *classPtr;
 253
 254     /* Check if a class with this name already exists */
 255
 256     classPtr = CLASS_FindClassByAtom( atom, hInstance );
 257     if (classPtr)
 258     {
 259         /* Class can be created only if it is local and */
 260         /* if the class with the same name is global.   */
 261
 262         if (style & CS_GLOBALCLASS) return NULL;
 263         if (!(classPtr->style & CS_GLOBALCLASS)) return NULL;
 264     }
 265
 266     /* Fix the extra bytes value */
 267
 268     if (classExtra < 0) classExtra = 0;
 269     else if (classExtra > 40)  /* Extra bytes are limited to 40 in Win32 */
 270         fprintf(stderr, "Warning: class extra bytes %d is > 40\n", classExtra);
 271     if (winExtra < 0) winExtra = 0;
 272     else if (winExtra > 40)    /* Extra bytes are limited to 40 in Win32 */
 273         fprintf( stderr, "Warning: win extra bytes %d is > 40\n", winExtra );
 274
 275     /* Create the class */
 276
 277     classPtr = (CLASS *)HeapAlloc( SystemHeap, 0, sizeof(CLASS) +
 278                                        classExtra - sizeof(classPtr->wExtra) );
 279     if (!classPtr) return NULL;
 280     classPtr->next        = firstClass;
 281     classPtr->magic       = CLASS_MAGIC;
 282     classPtr->cWindows    = 0;
 283     classPtr->style       = style;
 284     classPtr->winproc     = (HWINDOWPROC)0;
 285     classPtr->cbWndExtra  = winExtra;
 286     classPtr->cbClsExtra  = classExtra;
 287     classPtr->hInstance   = hInstance;
 288     classPtr->atomName    = atom;
 289     classPtr->menuNameA   = 0;
 290     classPtr->menuNameW   = 0;
 291     classPtr->dce         = (style & CS_CLASSDC) ?
 292                                  DCE_AllocDCE( 0, DCE_CLASS_DC ) : NULL;
 293
 294     WINPROC_SetProc( &classPtr->winproc, wndProc, wndProcType, WIN_PROC_CLASS);
 295
 296     /* Other values must be set by caller */
 297
 298     if (classExtra) memset( classPtr->wExtra, 0, classExtra );
 299     firstClass = classPtr;
 300     return classPtr;
 301 }
 302
 303
 304 /***********************************************************************
 305  *           RegisterClass16    (USER.57)
 306  */
 307 ATOM RegisterClass16( const WNDCLASS16 *wc )
 308 {
 309     ATOM atom;
 310     CLASS *classPtr;
 311
 312     HINSTANCE32 hInstance = (HINSTANCE32)GetExePtr( wc->hInstance );
 313
 314     if (!(atom = GlobalAddAtom16( wc->lpszClassName ))) return 0;
 315     if (!(classPtr = CLASS_RegisterClass( atom, hInstance, wc->style,
 316                                           wc->cbClsExtra, wc->cbWndExtra,
 317                                           wc->lpfnWndProc, WIN_PROC_16 )))
 318     {
 319         GlobalDeleteAtom( atom );
 320         return 0;
 321     }
 322
 323     dprintf_class( stddeb, "RegisterClass16: atom=%04x wndproc=%08lx hinst=%04x bg=%04x style=%08x clsExt=%d winExt=%d class=%p\n",
 324                    atom, (DWORD)wc->lpfnWndProc, hInstance,
 325                    wc->hbrBackground, wc->style, wc->cbClsExtra,
 326                    wc->cbWndExtra, classPtr );
 327
 328     classPtr->hIcon         = wc->hIcon;
 329     classPtr->hIconSm       = 0;
 330     classPtr->hCursor       = wc->hCursor;
 331     classPtr->hbrBackground = wc->hbrBackground;
 332
 333     CLASS_SetMenuNameA( classPtr, HIWORD(wc->lpszMenuName) ?
 334                  PTR_SEG_TO_LIN(wc->lpszMenuName) : (LPCSTR)wc->lpszMenuName );
 335     return atom;
 336 }
 337
 338
 339 /***********************************************************************
 340  *           RegisterClass32A      (USER32.426)
 341  */
 342 ATOM RegisterClass32A( const WNDCLASS32A* wc )
 343 {
 344     ATOM atom;
 345     CLASS *classPtr;
 346
 347     /* FIXME: this should not be necessary for Win32 */
 348     HINSTANCE32 hInstance = (HINSTANCE32)GetExePtr( wc->hInstance );
 349
 350     if (!(atom = GlobalAddAtom32A( wc->lpszClassName ))) return 0;
 351     if (!(classPtr = CLASS_RegisterClass( atom, hInstance, wc->style,
 352                                           wc->cbClsExtra, wc->cbWndExtra,
 353                                           (WNDPROC16)wc->lpfnWndProc,
 354                                           WIN_PROC_32A )))
 355     {
 356         GlobalDeleteAtom( atom );
 357         return 0;
 358     }
 359
 360     dprintf_class( stddeb, "RegisterClass32A: atom=%04x wndproc=%08lx hinst=%04x bg=%04x style=%08x clsExt=%d winExt=%d class=%p\n",
 361                    atom, (DWORD)wc->lpfnWndProc, hInstance,
 362                    wc->hbrBackground, wc->style, wc->cbClsExtra,
 363                    wc->cbWndExtra, classPtr );
 364
 365     classPtr->hIcon         = (HICON16)wc->hIcon;
 366     classPtr->hIconSm       = 0;
 367     classPtr->hCursor       = (HCURSOR16)wc->hCursor;
 368     classPtr->hbrBackground = (HBRUSH16)wc->hbrBackground;
 369     CLASS_SetMenuNameA( classPtr, wc->lpszMenuName );
 370     return atom;
 371 }
 372
 373
 374 /***********************************************************************
 375  *           RegisterClass32W      (USER32.429)
 376  */
 377 ATOM RegisterClass32W( const WNDCLASS32W* wc )
 378 {
 379     ATOM atom;
 380     CLASS *classPtr;
 381
 382     /* FIXME: this should not be necessary for Win32 */
 383     HINSTANCE32 hInstance = (HINSTANCE32)GetExePtr( wc->hInstance );
 384
 385     if (!(atom = GlobalAddAtom32W( wc->lpszClassName ))) return 0;
 386     if (!(classPtr = CLASS_RegisterClass( atom, hInstance, wc->style,
 387                                           wc->cbClsExtra, wc->cbWndExtra,
 388                                           (WNDPROC16)wc->lpfnWndProc,
 389                                           WIN_PROC_32W )))
 390     {
 391         GlobalDeleteAtom( atom );
 392         return 0;
 393     }
 394
 395     dprintf_class( stddeb, "RegisterClass32W: atom=%04x wndproc=%08lx hinst=%04x bg=%04x style=%08x clsExt=%d winExt=%d class=%p\n",
 396                    atom, (DWORD)wc->lpfnWndProc, hInstance,
 397                    wc->hbrBackground, wc->style, wc->cbClsExtra,
 398                    wc->cbWndExtra, classPtr );
 399
 400     classPtr->hIcon         = (HICON16)wc->hIcon;
 401     classPtr->hIconSm       = 0;
 402     classPtr->hCursor       = (HCURSOR16)wc->hCursor;
 403     classPtr->hbrBackground = (HBRUSH16)wc->hbrBackground;
 404     CLASS_SetMenuNameW( classPtr, wc->lpszMenuName );
 405     return atom;
 406 }
 407
 408
 409 /***********************************************************************
 410  *           RegisterClassEx16    (USER.397)
 411  */
 412 ATOM RegisterClassEx16( const WNDCLASSEX16 *wc )
 413 {
 414     ATOM atom;
 415     CLASS *classPtr;
 416
 417     HINSTANCE32 hInstance = (HINSTANCE32)GetExePtr( wc->hInstance );
 418
 419     if (!(atom = GlobalAddAtom16( wc->lpszClassName ))) return 0;
 420     if (!(classPtr = CLASS_RegisterClass( atom, hInstance, wc->style,
 421                                           wc->cbClsExtra, wc->cbWndExtra,
 422                                           wc->lpfnWndProc, WIN_PROC_16 )))
 423     {
 424         GlobalDeleteAtom( atom );
 425         return 0;
 426     }
 427
 428     dprintf_class( stddeb, "RegisterClassEx16: atom=%04x wndproc=%08lx hinst=%04x bg=%04x style=%08x clsExt=%d winExt=%d class=%p\n",
 429                    atom, (DWORD)wc->lpfnWndProc, hInstance,
 430                    wc->hbrBackground, wc->style, wc->cbClsExtra,
 431                    wc->cbWndExtra, classPtr );
 432
 433     classPtr->hIcon         = wc->hIcon;
 434     classPtr->hIconSm       = wc->hIconSm;
 435     classPtr->hCursor       = wc->hCursor;
 436     classPtr->hbrBackground = wc->hbrBackground;
 437
 438     CLASS_SetMenuNameA( classPtr, HIWORD(wc->lpszMenuName) ?
 439                  PTR_SEG_TO_LIN(wc->lpszMenuName) : (LPCSTR)wc->lpszMenuName );
 440     return atom;
 441 }
 442
 443
 444 /***********************************************************************
 445  *           RegisterClassEx32A      (USER32.427)
 446  */
 447 ATOM RegisterClassEx32A( const WNDCLASSEX32A* wc )
 448 {
 449     ATOM atom;
 450     CLASS *classPtr;
 451
 452     /* FIXME: this should not be necessary for Win32 */
 453     HINSTANCE32 hInstance = (HINSTANCE32)GetExePtr( wc->hInstance );
 454
 455     if (!(atom = GlobalAddAtom32A( wc->lpszClassName ))) return 0;
 456     if (!(classPtr = CLASS_RegisterClass( atom, hInstance, wc->style,
 457                                           wc->cbClsExtra, wc->cbWndExtra,
 458                                           (WNDPROC16)wc->lpfnWndProc,
 459                                           WIN_PROC_32A )))
 460     {
 461         GlobalDeleteAtom( atom );
 462         return 0;
 463     }
 464
 465     dprintf_class( stddeb, "RegisterClassEx32A: atom=%04x wndproc=%08lx hinst=%04x bg=%04x style=%08x clsExt=%d winExt=%d class=%p\n",
 466                    atom, (DWORD)wc->lpfnWndProc, hInstance,
 467                    wc->hbrBackground, wc->style, wc->cbClsExtra,
 468                    wc->cbWndExtra, classPtr );
 469
 470     classPtr->hIcon         = (HICON16)wc->hIcon;
 471     classPtr->hIconSm       = (HICON16)wc->hIconSm;
 472     classPtr->hCursor       = (HCURSOR16)wc->hCursor;
 473     classPtr->hbrBackground = (HBRUSH16)wc->hbrBackground;
 474     CLASS_SetMenuNameA( classPtr, wc->lpszMenuName );
 475     return atom;
 476 }
 477
 478
 479 /***********************************************************************
 480  *           RegisterClassEx32W      (USER32.428)
 481  */
 482 ATOM RegisterClassEx32W( const WNDCLASSEX32W* wc )
 483 {
 484     ATOM atom;
 485     CLASS *classPtr;
 486
 487     /* FIXME: this should not be necessary for Win32 */
 488     HINSTANCE32 hInstance = (HINSTANCE32)GetExePtr( wc->hInstance );
 489
 490     if (!(atom = GlobalAddAtom32W( wc->lpszClassName ))) return 0;
 491     if (!(classPtr = CLASS_RegisterClass( atom, hInstance, wc->style,
 492                                           wc->cbClsExtra, wc->cbWndExtra,
 493                                           (WNDPROC16)wc->lpfnWndProc,
 494                                           WIN_PROC_32W )))
 495     {
 496         GlobalDeleteAtom( atom );
 497         return 0;
 498     }
 499
 500     dprintf_class( stddeb, "RegisterClassEx32W: atom=%04x wndproc=%08lx hinst=%04x bg=%04x style=%08x clsExt=%d winExt=%d class=%p\n",
 501                    atom, (DWORD)wc->lpfnWndProc, hInstance,
 502                    wc->hbrBackground, wc->style, wc->cbClsExtra,
 503                    wc->cbWndExtra, classPtr );
 504
 505     classPtr->hIcon         = (HICON16)wc->hIcon;
 506     classPtr->hIconSm       = (HICON16)wc->hIconSm;
 507     classPtr->hCursor       = (HCURSOR16)wc->hCursor;
 508     classPtr->hbrBackground = (HBRUSH16)wc->hbrBackground;
 509     CLASS_SetMenuNameW( classPtr, wc->lpszMenuName );
 510     return atom;
 511 }
 512
 513
 514 /***********************************************************************
 515  *           UnregisterClass16    (USER.403)
 516  */
 517 BOOL16 UnregisterClass16( SEGPTR className, HINSTANCE16 hInstance )
 518 {
 519     CLASS *classPtr;
 520     ATOM atom;
 521
 522     hInstance = GetExePtr( hInstance );
 523     if (!(atom = GlobalFindAtom16( className ))) return FALSE;
 524     if (!(classPtr = CLASS_FindClassByAtom( atom, hInstance )) ||
 525         (classPtr->hInstance != hInstance)) return FALSE;
 526     return CLASS_FreeClass( classPtr );
 527 }
 528
 529
 530 /***********************************************************************
 531  *           UnregisterClass32A    (USER32.562)
 532  */
 533 BOOL32 UnregisterClass32A( LPCSTR className, HINSTANCE32 hInstance )
 534 {
 535     CLASS *classPtr;
 536     ATOM atom;
 537
 538     hInstance = GetExePtr( hInstance );  /* FIXME: not needed in Win32 */
 539     if (!(atom = GlobalFindAtom32A( className ))) return FALSE;
 540     if (!(classPtr = CLASS_FindClassByAtom( atom, hInstance )) ||
 541         (classPtr->hInstance != hInstance)) return FALSE;
 542     return CLASS_FreeClass( classPtr );
 543 }
 544
 545
 546 /***********************************************************************
 547  *           UnregisterClass32W    (USER32.563)
 548  */
 549 BOOL32 UnregisterClass32W( LPCWSTR className, HINSTANCE32 hInstance )
 550 {
 551     CLASS *classPtr;
 552     ATOM atom;
 553
 554     hInstance = GetExePtr( hInstance );  /* FIXME: not needed in Win32 */
 555     if (!(atom = GlobalFindAtom32W( className ))) return FALSE;
 556     if (!(classPtr = CLASS_FindClassByAtom( atom, hInstance )) ||
 557         (classPtr->hInstance != hInstance)) return FALSE;
 558     return CLASS_FreeClass( classPtr );
 559 }
 560
 561
 562 /***********************************************************************
 563  *           GetClassWord16    (USER.129)
 564  */
 565 WORD GetClassWord16( HWND16 hwnd, INT16 offset )
 566 {
 567     return GetClassWord32( hwnd, offset );
 568 }
 569
 570
 571 /***********************************************************************
 572  *           GetClassWord32    (USER32.218)
 573  */
 574 WORD GetClassWord32( HWND32 hwnd, INT32 offset )
 575 {
 576     WND * wndPtr;
 577
 578     if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return 0;
 579     if (offset >= 0)
 580     {
 581         if (offset <= wndPtr->class->cbClsExtra - sizeof(WORD))
 582             return GET_WORD(((char *)wndPtr->class->wExtra) + offset);
 583     }
 584     else switch(offset)
 585     {
 586         case GCW_HBRBACKGROUND: return wndPtr->class->hbrBackground;
 587         case GCW_HCURSOR:       return wndPtr->class->hCursor;
 588         case GCW_HICON:         return wndPtr->class->hIcon;
 589         case GCW_HICONSM:       return wndPtr->class->hIconSm;
 590         case GCW_ATOM:          return wndPtr->class->atomName;
 591         case GCW_STYLE:
 592         case GCW_CBWNDEXTRA:
 593         case GCW_CBCLSEXTRA:
 594         case GCW_HMODULE:
 595             return (WORD)GetClassLong32A( hwnd, offset );
 596     }
 597     fprintf(stderr, "Warning: invalid offset %d for GetClassWord()\n", offset);
 598     return 0;
 599 }
 600
 601
 602 /***********************************************************************
 603  *           GetClassLong16    (USER.131)
 604  */
 605 LONG GetClassLong16( HWND16 hwnd, INT16 offset )
 606 {
 607     WND *wndPtr;
 608     LONG ret;
 609
 610     switch( offset )
 611     {
 612     case GCL_WNDPROC:
 613         if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return 0;
 614         return (LONG)WINPROC_GetProc( wndPtr->class->winproc, WIN_PROC_16 );
 615     case GCL_MENUNAME:
 616         ret = GetClassLong32A( hwnd, offset );
 617         return (LONG)SEGPTR_GET( (void *)ret );
 618     default:
 619         return GetClassLong32A( hwnd, offset );
 620     }
 621 }
 622
 623
 624 /***********************************************************************
 625  *           GetClassLong32A    (USER32.214)
 626  */
 627 LONG GetClassLong32A( HWND32 hwnd, INT32 offset )
 628 {
 629     WND * wndPtr;
 630
 631     if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return 0;
 632     if (offset >= 0)
 633     {
 634         if (offset <= wndPtr->class->cbClsExtra - sizeof(LONG))
 635             return GET_DWORD(((char *)wndPtr->class->wExtra) + offset);
 636     }
 637     switch(offset)
 638     {
 639         case GCL_STYLE:      return (LONG)wndPtr->class->style;
 640         case GCL_CBWNDEXTRA: return (LONG)wndPtr->class->cbWndExtra;
 641         case GCL_CBCLSEXTRA: return (LONG)wndPtr->class->cbClsExtra;
 642         case GCL_HMODULE:    return (LONG)wndPtr->class->hInstance;
 643         case GCL_WNDPROC:
 644             return (LONG)WINPROC_GetProc(wndPtr->class->winproc, WIN_PROC_32A);
 645         case GCL_MENUNAME:
 646             return (LONG)CLASS_GetMenuNameA( wndPtr->class );
 647         case GCL_HBRBACKGROUND:
 648         case GCL_HCURSOR:
 649         case GCL_HICON:
 650         case GCL_HICONSM:
 651             return GetClassWord32( hwnd, offset );
 652     }
 653     fprintf(stderr, "Warning: invalid offset %d for GetClassLong()\n", offset);
 654     return 0;
 655 }
 656
 657
 658 /***********************************************************************
 659  *           GetClassLong32W    (USER32.215)
 660  */
 661 LONG GetClassLong32W( HWND32 hwnd, INT32 offset )
 662 {
 663     WND * wndPtr;
 664
 665     switch(offset)
 666     {
 667     case GCL_WNDPROC:
 668         if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return 0;
 669         return (LONG)WINPROC_GetProc( wndPtr->class->winproc, WIN_PROC_32W );
 670     case GCL_MENUNAME:
 671         if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return 0;
 672         return (LONG)CLASS_GetMenuNameW( wndPtr->class );
 673     default:
 674         return GetClassLong32A( hwnd, offset );
 675     }
 676 }
 677
 678
 679 /***********************************************************************
 680  *           SetClassWord16    (USER.130)
 681  */
 682 WORD SetClassWord16( HWND16 hwnd, INT16 offset, WORD newval )
 683 {
 684     return SetClassWord32( hwnd, offset, newval );
 685 }
 686
 687
 688 /***********************************************************************
 689  *           SetClassWord32    (USER32.468)
 690  */
 691 WORD SetClassWord32( HWND32 hwnd, INT32 offset, WORD newval )
 692 {
 693     WND * wndPtr;
 694     WORD retval = 0;
 695     void *ptr;
 696
 697     if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return 0;
 698     if (offset >= 0)
 699     {
 700         if (offset + sizeof(WORD) <= wndPtr->class->cbClsExtra)
 701             ptr = ((char *)wndPtr->class->wExtra) + offset;
 702         else
 703         {
 704             fprintf( stderr, "Warning: invalid offset %d for SetClassWord()\n",
 705                      offset );
 706             return 0;
 707         }
 708     }
 709     else switch(offset)
 710     {
 711         case GCW_STYLE:
 712         case GCW_CBWNDEXTRA:
 713         case GCW_CBCLSEXTRA:
 714         case GCW_HMODULE:
 715             return (WORD)SetClassLong32A( hwnd, offset, (LONG)newval );
 716         case GCW_HBRBACKGROUND: ptr = &wndPtr->class->hbrBackground; break;
 717         case GCW_HCURSOR:       ptr = &wndPtr->class->hCursor; break;
 718         case GCW_HICON:         ptr = &wndPtr->class->hIcon; break;
 719         case GCW_HICONSM:       ptr = &wndPtr->class->hIconSm; break;
 720         case GCW_ATOM:          ptr = &wndPtr->class->atomName; break;
 721         default:
 722             fprintf( stderr, "Warning: invalid offset %d for SetClassWord()\n",
 723                      offset);
 724             return 0;
 725     }
 726     retval = GET_WORD(ptr);
 727     PUT_WORD( ptr, newval );
 728     return retval;
 729 }
 730
 731
 732 /***********************************************************************
 733  *           SetClassLong16    (USER.132)
 734  */
 735 LONG SetClassLong16( HWND16 hwnd, INT16 offset, LONG newval )
 736 {
 737     WND *wndPtr;
 738     LONG retval;
 739
 740     switch(offset)
 741     {
 742     case GCL_WNDPROC:
 743         if (!(wndPtr = WIN_FindWndPtr(hwnd))) return 0;
 744         retval = (LONG)WINPROC_GetProc( wndPtr->class->winproc, WIN_PROC_16 );
 745         WINPROC_SetProc( &wndPtr->class->winproc, (WNDPROC16)newval,
 746                          WIN_PROC_16, WIN_PROC_CLASS );
 747         return retval;
 748     case GCL_MENUNAME:
 749         return SetClassLong32A( hwnd, offset, (LONG)PTR_SEG_TO_LIN(newval) );
 750     default:
 751         return SetClassLong32A( hwnd, offset, newval );
 752     }
 753 }
 754
 755
 756 /***********************************************************************
 757  *           SetClassLong32A    (USER32.466)
 758  */
 759 LONG SetClassLong32A( HWND32 hwnd, INT32 offset, LONG newval )
 760 {
 761     WND * wndPtr;
 762     LONG retval = 0;
 763     void *ptr;
 764
 765     if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return 0;
 766     if (offset >= 0)
 767     {
 768         if (offset + sizeof(LONG) <= wndPtr->class->cbClsExtra)
 769             ptr = ((char *)wndPtr->class->wExtra) + offset;
 770         else
 771         {
 772             fprintf( stderr, "Warning: invalid offset %d for SetClassLong()\n",
 773                      offset );
 774             return 0;
 775         }
 776     }
 777     else switch(offset)
 778     {
 779         case GCL_MENUNAME:
 780             CLASS_SetMenuNameA( wndPtr->class, (LPCSTR)newval );
 781             return 0;  /* Old value is now meaningless anyway */
 782         case GCL_WNDPROC:
 783             retval = (LONG)WINPROC_GetProc( wndPtr->class->winproc,
 784                                             WIN_PROC_32A );
 785             WINPROC_SetProc( &wndPtr->class->winproc, (WNDPROC16)newval,
 786                              WIN_PROC_32A, WIN_PROC_CLASS );
 787             return retval;
 788         case GCL_HBRBACKGROUND:
 789         case GCL_HCURSOR:
 790         case GCL_HICON:
 791         case GCL_HICONSM:
 792             return SetClassWord32( hwnd, offset, (WORD)newval );
 793         case GCL_STYLE:      ptr = &wndPtr->class->style; break;
 794         case GCL_CBWNDEXTRA: ptr = &wndPtr->class->cbWndExtra; break;
 795         case GCL_CBCLSEXTRA: ptr = &wndPtr->class->cbClsExtra; break;
 796         case GCL_HMODULE:    ptr = &wndPtr->class->hInstance; break;
 797         default:
 798             fprintf( stderr, "Warning: invalid offset %d for SetClassLong()\n",
 799                      offset);
 800             return 0;
 801     }
 802     retval = GET_DWORD(ptr);
 803     PUT_DWORD( ptr, newval );
 804     return retval;
 805 }
 806
 807
 808 /***********************************************************************
 809  *           SetClassLong32W    (USER32.467)
 810  */
 811 LONG SetClassLong32W( HWND32 hwnd, INT32 offset, LONG newval )
 812 {
 813     WND *wndPtr;
 814     LONG retval;
 815
 816     switch(offset)
 817     {
 818     case GCL_WNDPROC:
 819         if (!(wndPtr = WIN_FindWndPtr(hwnd))) return 0;
 820         retval = (LONG)WINPROC_GetProc( wndPtr->class->winproc, WIN_PROC_32W );
 821         WINPROC_SetProc( &wndPtr->class->winproc, (WNDPROC16)newval,
 822                          WIN_PROC_32W, WIN_PROC_CLASS );
 823         return retval;
 824     case GCL_MENUNAME:
 825         if (!(wndPtr = WIN_FindWndPtr(hwnd))) return 0;
 826         CLASS_SetMenuNameW( wndPtr->class, (LPCWSTR)newval );
 827         return 0;  /* Old value is now meaningless anyway */
 828     default:
 829         return SetClassLong32A( hwnd, offset, newval );
 830     }
 831 }
 832
 833
 834 /***********************************************************************
 835  *           GetClassName16      (USER.58)
 836  */
 837 INT16 GetClassName16( HWND16 hwnd, LPSTR buffer, INT16 count )
 838 {
 839     WND *wndPtr;
 840     if (!(wndPtr = WIN_FindWndPtr(hwnd))) return 0;
 841     return GlobalGetAtomName16( wndPtr->class->atomName, buffer, count );
 842 }
 843
 844
 845 /***********************************************************************
 846  *           GetClassName32A      (USER32.216)
 847  */
 848 INT32 GetClassName32A( HWND32 hwnd, LPSTR buffer, INT32 count )
 849 {
 850     WND *wndPtr;
 851     if (!(wndPtr = WIN_FindWndPtr(hwnd))) return 0;
 852     return GlobalGetAtomName32A( wndPtr->class->atomName, buffer, count );
 853 }
 854
 855
 856 /***********************************************************************
 857  *           GetClassName32W      (USER32.217)
 858  */
 859 INT32 GetClassName32W( HWND32 hwnd, LPWSTR buffer, INT32 count )
 860 {
 861     WND *wndPtr;
 862     if (!(wndPtr = WIN_FindWndPtr(hwnd))) return 0;
 863     return GlobalGetAtomName32W( wndPtr->class->atomName, buffer, count );
 864 }
 865
 866
 867 /***********************************************************************
 868  *           GetClassInfo16      (USER.404)
 869  */
 870 BOOL16 GetClassInfo16( HINSTANCE16 hInstance, SEGPTR name, WNDCLASS16 *wc )
 871 {
 872     ATOM atom;
 873     CLASS *classPtr;
 874
 875     hInstance = GetExePtr( hInstance );
 876     if (!(atom = GlobalFindAtom16( name )) ||
 877         !(classPtr = CLASS_FindClassByAtom( atom, hInstance )) ||
 878         (hInstance != classPtr->hInstance)) return FALSE;
 879     wc->style         = (UINT16)classPtr->style;
 880     wc->lpfnWndProc   = WINPROC_GetProc( classPtr->winproc, WIN_PROC_16 );
 881     wc->cbClsExtra    = (INT16)classPtr->cbClsExtra;
 882     wc->cbWndExtra    = (INT16)classPtr->cbWndExtra;
 883     wc->hInstance     = (HINSTANCE16)classPtr->hInstance;
 884     wc->hIcon         = classPtr->hIcon;
 885     wc->hCursor       = classPtr->hCursor;
 886     wc->hbrBackground = classPtr->hbrBackground;
 887     wc->lpszClassName = (SEGPTR)0;
 888     wc->lpszMenuName  = (SEGPTR)CLASS_GetMenuNameA( classPtr );
 889     if (HIWORD(wc->lpszMenuName))  /* Make it a SEGPTR */
 890         wc->lpszMenuName = SEGPTR_GET( (LPSTR)wc->lpszMenuName );
 891     return TRUE;
 892 }
 893
 894
 895 /***********************************************************************
 896  *           GetClassInfo32A      (USER32.210)
 897  */
 898 BOOL32 GetClassInfo32A( HINSTANCE32 hInstance, LPCSTR name, WNDCLASS32A *wc )
 899 {
 900     ATOM atom;
 901     CLASS *classPtr;
 902
 903     hInstance = GetExePtr( hInstance );  /* FIXME: not needed in Win32 */
 904     if (!(atom = GlobalFindAtom32A( name )) ||
 905         !(classPtr = CLASS_FindClassByAtom( atom, hInstance )) ||
 906         (classPtr->hInstance && (hInstance != classPtr->hInstance)))
 907         return FALSE;
 908
 909     wc->style         = classPtr->style;
 910     wc->lpfnWndProc   = (WNDPROC32)WINPROC_GetProc( classPtr->winproc,
 911                                                     WIN_PROC_32A );
 912     wc->cbClsExtra    = classPtr->cbClsExtra;
 913     wc->cbWndExtra    = classPtr->cbWndExtra;
 914     wc->hInstance     = classPtr->hInstance;
 915     wc->hIcon         = (HICON32)classPtr->hIcon;
 916     wc->hCursor       = (HCURSOR32)classPtr->hCursor;
 917     wc->hbrBackground = (HBRUSH32)classPtr->hbrBackground;
 918     wc->lpszMenuName  = CLASS_GetMenuNameA( classPtr );
 919     wc->lpszClassName = NULL;
 920     return TRUE;
 921 }
 922
 923
 924 /***********************************************************************
 925  *           GetClassInfo32W      (USER32.213)
 926  */
 927 BOOL32 GetClassInfo32W( HINSTANCE32 hInstance, LPCWSTR name, WNDCLASS32W *wc )
 928 {
 929     ATOM atom;
 930     CLASS *classPtr;
 931
 932     hInstance = GetExePtr( hInstance );  /* FIXME: not needed in Win32 */
 933     if (!(atom = GlobalFindAtom32W( name )) ||
 934         !(classPtr = CLASS_FindClassByAtom( atom, hInstance )) ||
 935         (classPtr->hInstance && (hInstance != classPtr->hInstance)))
 936         return FALSE;
 937
 938     wc->style         = classPtr->style;
 939     wc->lpfnWndProc   = (WNDPROC32)WINPROC_GetProc( classPtr->winproc,
 940                                                     WIN_PROC_32W );
 941     wc->cbClsExtra    = classPtr->cbClsExtra;
 942     wc->cbWndExtra    = classPtr->cbWndExtra;
 943     wc->hInstance     = classPtr->hInstance;
 944     wc->hIcon         = (HICON32)classPtr->hIcon;
 945     wc->hCursor       = (HCURSOR32)classPtr->hCursor;
 946     wc->hbrBackground = (HBRUSH32)classPtr->hbrBackground;
 947     wc->lpszMenuName  = CLASS_GetMenuNameW( classPtr );
 948     wc->lpszClassName = NULL;
 949     return TRUE;
 950 }
 951
 952
 953 /***********************************************************************
 954  *           GetClassInfoEx16      (USER.398)
 955  *
 956  * FIXME: this is just a guess, I have no idea if GetClassInfoEx() is the
 957  * same in Win16 as in Win32. --AJ
 958  */
 959 BOOL16 GetClassInfoEx16( HINSTANCE16 hInstance, SEGPTR name, WNDCLASSEX16 *wc )
 960 {
 961     ATOM atom;
 962     CLASS *classPtr;
 963
 964     hInstance = GetExePtr( hInstance );
 965     if (!(atom = GlobalFindAtom16( name )) ||
 966         !(classPtr = CLASS_FindClassByAtom( atom, hInstance )) ||
 967         (hInstance != classPtr->hInstance)) return FALSE;
 968     wc->style         = classPtr->style;
 969     wc->lpfnWndProc   = WINPROC_GetProc( classPtr->winproc, WIN_PROC_16 );
 970     wc->cbClsExtra    = (INT16)classPtr->cbClsExtra;
 971     wc->cbWndExtra    = (INT16)classPtr->cbWndExtra;
 972     wc->hInstance     = (HINSTANCE16)classPtr->hInstance;
 973     wc->hIcon         = classPtr->hIcon;
 974     wc->hIconSm       = classPtr->hIconSm;
 975     wc->hCursor       = classPtr->hCursor;
 976     wc->hbrBackground = classPtr->hbrBackground;
 977     wc->lpszClassName = (SEGPTR)0;
 978     wc->lpszMenuName  = (SEGPTR)CLASS_GetMenuNameA( classPtr );
 979     if (HIWORD(wc->lpszMenuName))  /* Make it a SEGPTR */
 980         wc->lpszMenuName = SEGPTR_GET( (LPSTR)wc->lpszMenuName );
 981     return TRUE;
 982 }
 983
 984
 985 /***********************************************************************
 986  *           GetClassInfoEx32A      (USER32.211)
 987  */
 988 BOOL32 GetClassInfoEx32A( HINSTANCE32 hInstance, LPCSTR name,
 989                           WNDCLASSEX32A *wc )
 990 {
 991     ATOM atom;
 992     CLASS *classPtr;
 993
 994     hInstance = GetExePtr( hInstance );  /* FIXME: not needed in Win32 */
 995     if (!(atom = GlobalFindAtom32A( name )) ||
 996         !(classPtr = CLASS_FindClassByAtom( atom, hInstance )) ||
 997         (hInstance != classPtr->hInstance)) return FALSE;
 998     wc->style         = classPtr->style;
 999     wc->lpfnWndProc   = (WNDPROC32)WINPROC_GetProc( classPtr->winproc,
1000                                                     WIN_PROC_32A );
1001     wc->cbClsExtra    = classPtr->cbClsExtra;
1002     wc->cbWndExtra    = classPtr->cbWndExtra;
1003     wc->hInstance     = classPtr->hInstance;
1004     wc->hIcon         = (HICON32)classPtr->hIcon;
1005     wc->hIconSm       = (HICON32)classPtr->hIconSm;
1006     wc->hCursor       = (HCURSOR32)classPtr->hCursor;
1007     wc->hbrBackground = (HBRUSH32)classPtr->hbrBackground;
1008     wc->lpszMenuName  = CLASS_GetMenuNameA( classPtr );
1009     wc->lpszClassName = NULL;
1010     return TRUE;
1011 }
1012
1013
1014 /***********************************************************************
1015  *           GetClassInfoEx32W      (USER32.212)
1016  */
1017 BOOL32 GetClassInfoEx32W( HINSTANCE32 hInstance, LPCWSTR name,
1018                           WNDCLASSEX32W *wc )
1019 {
1020     ATOM atom;
1021     CLASS *classPtr;
1022
1023     hInstance = GetExePtr( hInstance );  /* FIXME: not needed in Win32 */
1024     if (!(atom = GlobalFindAtom32W( name )) ||
1025         !(classPtr = CLASS_FindClassByAtom( atom, hInstance )) ||
1026         (hInstance != classPtr->hInstance)) return FALSE;
1027     wc->style         = classPtr->style;
1028     wc->lpfnWndProc   = (WNDPROC32)WINPROC_GetProc( classPtr->winproc,
1029                                                     WIN_PROC_32W );
1030     wc->cbClsExtra    = classPtr->cbClsExtra;
1031     wc->cbWndExtra    = classPtr->cbWndExtra;
1032     wc->hInstance     = classPtr->hInstance;
1033     wc->hIcon         = (HICON32)classPtr->hIcon;
1034     wc->hIconSm       = (HICON32)classPtr->hIconSm;
1035     wc->hCursor       = (HCURSOR32)classPtr->hCursor;
1036     wc->hbrBackground = (HBRUSH32)classPtr->hbrBackground;
1037     wc->lpszMenuName  = CLASS_GetMenuNameW( classPtr );
1038     wc->lpszClassName = NULL;
1039     return TRUE;
1040 }
1041
1042
1043 /***********************************************************************
1044  *           ClassFirst      (TOOLHELP.69)
1045  */
1046 BOOL16 ClassFirst( CLASSENTRY *pClassEntry )
1047 {
1048     pClassEntry->wNext = 1;
1049     return ClassNext( pClassEntry );
1050 }
1051
1052
1053 /***********************************************************************
1054  *           ClassNext      (TOOLHELP.70)
1055  */
1056 BOOL16 ClassNext( CLASSENTRY *pClassEntry )
1057 {
1058     int i;
1059     CLASS *class = firstClass;
1060
1061     if (!pClassEntry->wNext) return FALSE;
1062     for (i = 1; (i < pClassEntry->wNext) && class; i++) class = class->next;
1063     if (!class)
1064     {
1065         pClassEntry->wNext = 0;
1066         return FALSE;
1067     }
1068     pClassEntry->hInst = class->hInstance;
1069     pClassEntry->wNext++;
1070     GlobalGetAtomName32A( class->atomName, pClassEntry->szClassName,
1071                           sizeof(pClassEntry->szClassName) );
1072     return TRUE;
1073 }