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