source: trunk/src/msvcrt/cpp.c@ 9901

Last change on this file since 9901 was 9633, checked in by sandervl, 23 years ago

PF: Msvcrt Wine port with GCC
File size: 15.6 KB
Line 
1/*
2 * msvcrt.dll C++ objects
3 *
4 * Copyright 2000 Jon Griffiths
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21#include "msvcrt.h"
22#include "msvcrt/eh.h"
23#include "msvcrt/stdlib.h"
24
25#include "wine/debug.h"
26
27WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
28
29
30typedef void (*v_table_ptr)();
31
32static v_table_ptr exception_vtable[2];
33static v_table_ptr bad_typeid_vtable[3];
34static v_table_ptr __non_rtti_object_vtable[3];
35static v_table_ptr bad_cast_vtable[3];
36static v_table_ptr type_info_vtable[1];
37
38typedef struct __exception
39{
40 v_table_ptr *vtable;
41 const char *name;
42 int do_free; /* FIXME: take string copy with char* ctor? */
43} exception;
44
45typedef struct __bad_typeid
46{
47 exception base;
48} bad_typeid;
49
50typedef struct ____non_rtti_object
51{
52 bad_typeid base;
53} __non_rtti_object;
54
55typedef struct __bad_cast
56{
57 exception base;
58} bad_cast;
59
60typedef struct __type_info
61{
62 v_table_ptr *vtable;
63 void *data;
64 char name[1];
65} type_info;
66
67typedef struct _rtti_base_descriptor
68{
69 type_info *type_descriptor;
70 int num_base_classes;
71 int base_class_offset;
72 unsigned int flags;
73} rtti_base_descriptor;
74
75typedef struct _rtti_base_array
76{
77 rtti_base_descriptor *bases[1]; /* First element is the class itself */
78} rtti_base_array;
79
80typedef struct _rtti_object_hierachy
81{
82 int unknown1;
83 int unknown2;
84 int array_len; /* Size of the array pointed to by 'base_classes' */
85 rtti_base_array *base_classes;
86} rtti_object_hierachy;
87
88typedef struct _rtti_object_locator
89{
90 int unknown1;
91 int base_class_offset;
92 unsigned int flags;
93 type_info *type_descriptor;
94 rtti_object_hierachy *type_hierachy;
95} rtti_object_locator;
96
97/******************************************************************
98 * ??0exception@@QAE@ABQBD@Z (MSVCRT.@)
99 */
100void MSVCRT_exception_ctor(exception * _this, const char ** name)
101{
102 TRACE("(%p %s)\n",_this,*name);
103 _this->vtable = exception_vtable;
104 _this->name = *name;
105 TRACE("name = %s\n",_this->name);
106 _this->do_free = 0; /* FIXME */
107}
108
109/******************************************************************
110 * ??0exception@@QAE@ABV0@@Z (MSVCRT.@)
111 */
112void MSVCRT_exception_copy_ctor(exception * _this, const exception * rhs)
113{
114 TRACE("(%p %p)\n",_this,rhs);
115 if (_this != rhs)
116 memcpy (_this, rhs, sizeof (*_this));
117 TRACE("name = %s\n",_this->name);
118}
119
120/******************************************************************
121 * ??0exception@@QAE@XZ (MSVCRT.@)
122 */
123void MSVCRT_exception_default_ctor(exception * _this)
124{
125 TRACE("(%p)\n",_this);
126 _this->vtable = exception_vtable;
127 _this->name = "";
128 _this->do_free = 0; /* FIXME */
129}
130
131/******************************************************************
132 * ??1exception@@UAE@XZ (MSVCRT.@)
133 */
134void MSVCRT_exception_dtor(exception * _this)
135{
136 TRACE("(%p)\n",_this);
137}
138
139/******************************************************************
140 * ??4exception@@QAEAAV0@ABV0@@Z (MSVCRT.@)
141 */
142exception * MSVCRT_exception_opequals(exception * _this, const exception * rhs)
143{
144 TRACE("(%p %p)\n",_this,rhs);
145 memcpy (_this, rhs, sizeof (*_this));
146 TRACE("name = %s\n",_this->name);
147 return _this;
148}
149
150/******************************************************************
151 * ??_Eexception@@UAEPAXI@Z (MSVCRT.@)
152 */
153void * MSVCRT_exception__unknown_E(exception * _this, unsigned int arg1)
154{
155 TRACE("(%p %d)\n",_this,arg1);
156 _purecall();
157 return NULL;
158}
159
160/******************************************************************
161 * ??_Gexception@@UAEPAXI@Z (MSVCRT.@)
162 */
163void * MSVCRT_exception__unknown_G(exception * _this, unsigned int arg1)
164{
165 TRACE("(%p %d)\n",_this,arg1);
166 _purecall();
167 return NULL;
168}
169
170/******************************************************************
171 * ?what@exception@@UBEPBDXZ (MSVCRT.@)
172 */
173const char * MSVCRT_what_exception(exception * _this)
174{
175 TRACE("(%p) returning %s\n",_this,_this->name);
176 return _this->name;
177}
178
179
180/******************************************************************
181 * ?set_terminate@@YAP6AXXZP6AXXZ@Z (MSVCRT.@)
182 */
183terminate_function MSVCRT_set_terminate(terminate_function func)
184{
185 MSVCRT_thread_data *data = msvcrt_get_thread_data();
186 terminate_function previous = data->terminate_handler;
187 TRACE("(%p) returning %p\n",func,previous);
188 data->terminate_handler = func;
189 return previous;
190}
191
192/******************************************************************
193 * ?set_unexpected@@YAP6AXXZP6AXXZ@Z (MSVCRT.@)
194 */
195unexpected_function MSVCRT_set_unexpected(unexpected_function func)
196{
197 MSVCRT_thread_data *data = msvcrt_get_thread_data();
198 unexpected_function previous = data->unexpected_handler;
199 TRACE("(%p) returning %p\n",func,previous);
200 data->unexpected_handler = func;
201 return previous;
202}
203
204/******************************************************************
205 * ?_set_se_translator@@YAP6AXIPAU_EXCEPTION_POINTERS@@@ZP6AXI0@Z@Z (MSVCRT.@)
206 */
207_se_translator_function MSVCRT__set_se_translator(_se_translator_function func)
208{
209 MSVCRT_thread_data *data = msvcrt_get_thread_data();
210 _se_translator_function previous = data->se_translator;
211 TRACE("(%p) returning %p\n",func,previous);
212 data->se_translator = func;
213 return previous;
214}
215
216/******************************************************************
217 * ?terminate@@YAXXZ (MSVCRT.@)
218 */
219void MSVCRT_terminate(void)
220{
221 MSVCRT_thread_data *data = msvcrt_get_thread_data();
222 if (data->terminate_handler) data->terminate_handler();
223 MSVCRT_abort();
224}
225
226/******************************************************************
227 * ?unexpected@@YAXXZ (MSVCRT.@)
228 */
229void MSVCRT_unexpected(void)
230{
231 MSVCRT_thread_data *data = msvcrt_get_thread_data();
232 if (data->unexpected_handler) data->unexpected_handler();
233 MSVCRT_terminate();
234}
235
236
237/******************************************************************
238 * ??0bad_typeid@@QAE@ABV0@@Z (MSVCRT.@)
239 */
240void MSVCRT_bad_typeid_copy_ctor(bad_typeid * _this, const bad_typeid * rhs)
241{
242 TRACE("(%p %p)\n",_this,rhs);
243 MSVCRT_exception_copy_ctor(&_this->base,&rhs->base);
244}
245
246/******************************************************************
247 * ??0bad_typeid@@QAE@PBD@Z (MSVCRT.@)
248 */
249void MSVCRT_bad_typeid_ctor(bad_typeid * _this, const char * name)
250{
251 TRACE("(%p %s)\n",_this,name);
252 MSVCRT_exception_ctor(&_this->base, &name);
253 _this->base.vtable = bad_typeid_vtable;
254}
255
256/******************************************************************
257 * ??1bad_typeid@@UAE@XZ (MSVCRT.@)
258 */
259void MSVCRT_bad_typeid_dtor(bad_typeid * _this)
260{
261 TRACE("(%p)\n",_this);
262 MSVCRT_exception_dtor(&_this->base);
263}
264
265/******************************************************************
266 * ??4bad_typeid@@QAEAAV0@ABV0@@Z (MSVCRT.@)
267 */
268bad_typeid * MSVCRT_bad_typeid_opequals(bad_typeid * _this, const bad_typeid * rhs)
269{
270 TRACE("(%p %p)\n",_this,rhs);
271 MSVCRT_exception_copy_ctor(&_this->base,&rhs->base);
272 return _this;
273}
274
275/******************************************************************
276 * ??0__non_rtti_object@@QAE@ABV0@@Z (MSVCRT.@)
277 */
278void MSVCRT___non_rtti_object_copy_ctor(__non_rtti_object * _this,
279 const __non_rtti_object * rhs)
280{
281 TRACE("(%p %p)\n",_this,rhs);
282 MSVCRT_bad_typeid_copy_ctor(&_this->base,&rhs->base);
283}
284
285/******************************************************************
286 * ??0__non_rtti_object@@QAE@PBD@Z (MSVCRT.@)
287 */
288void MSVCRT___non_rtti_object_ctor(__non_rtti_object * _this,
289 const char * name)
290{
291 TRACE("(%p %s)\n",_this,name);
292 MSVCRT_bad_typeid_ctor(&_this->base,name);
293 _this->base.base.vtable = __non_rtti_object_vtable;
294}
295
296/******************************************************************
297 * ??1__non_rtti_object@@UAE@XZ (MSVCRT.@)
298 */
299void MSVCRT___non_rtti_object_dtor(__non_rtti_object * _this)
300{
301 TRACE("(%p)\n",_this);
302 MSVCRT_bad_typeid_dtor(&_this->base);
303}
304
305/******************************************************************
306 * ??4__non_rtti_object@@QAEAAV0@ABV0@@Z (MSVCRT.@)
307 */
308__non_rtti_object * MSVCRT___non_rtti_object_opequals(__non_rtti_object * _this,
309 const __non_rtti_object *rhs)
310{
311 TRACE("(%p %p)\n",_this,rhs);
312 memcpy (_this, rhs, sizeof (*_this));
313 TRACE("name = %s\n",_this->base.base.name);
314 return _this;
315}
316
317/******************************************************************
318 * ??_E__non_rtti_object@@UAEPAXI@Z (MSVCRT.@)
319 */
320void * MSVCRT___non_rtti_object__unknown_E(__non_rtti_object * _this, unsigned int arg1)
321{
322 TRACE("(%p %d)\n",_this,arg1);
323 _purecall();
324 return NULL;
325}
326
327/******************************************************************
328 * ??_G__non_rtti_object@@UAEPAXI@Z (MSVCRT.@)
329 */
330void * MSVCRT___non_rtti_object__unknown_G(__non_rtti_object * _this, unsigned int arg1)
331{
332 TRACE("(%p %d)\n",_this,arg1);
333 _purecall();
334 return NULL;
335}
336
337/******************************************************************
338 * ??0bad_cast@@QAE@ABQBD@Z (MSVCRT.@)
339 */
340void MSVCRT_bad_cast_ctor(bad_cast * _this, const char ** name)
341{
342 TRACE("(%p %s)\n",_this,*name);
343 MSVCRT_exception_ctor(&_this->base, name);
344 _this->base.vtable = bad_cast_vtable;
345}
346
347/******************************************************************
348 * ??0bad_cast@@QAE@ABV0@@Z (MSVCRT.@)
349 */
350void MSVCRT_bad_cast_copy_ctor(bad_cast * _this, const bad_cast * rhs)
351{
352 TRACE("(%p %p)\n",_this,rhs);
353 MSVCRT_exception_copy_ctor(&_this->base,&rhs->base);
354}
355
356/******************************************************************
357 * ??1bad_cast@@UAE@XZ (MSVCRT.@)
358 */
359void MSVCRT_bad_cast_dtor(bad_cast * _this)
360{
361 TRACE("(%p)\n",_this);
362 MSVCRT_exception_dtor(&_this->base);
363}
364
365/******************************************************************
366 * ??4bad_cast@@QAEAAV0@ABV0@@Z (MSVCRT.@)
367 */
368bad_cast * MSVCRT_bad_cast_opequals(bad_cast * _this, const bad_cast * rhs)
369{
370 TRACE("(%p %p)\n",_this,rhs);
371 MSVCRT_exception_copy_ctor(&_this->base,&rhs->base);
372 return _this;
373}
374
375/******************************************************************
376 * ??8type_info@@QBEHABV0@@Z (MSVCRT.@)
377 */
378int __stdcall MSVCRT_type_info_opequals_equals(type_info * _this, const type_info * rhs)
379{
380 TRACE("(%p %p) returning %d\n",_this,rhs,_this->name == rhs->name);
381 return _this->name == rhs->name;
382}
383
384/******************************************************************
385 * ??9type_info@@QBEHABV0@@Z (MSVCRT.@)
386 */
387int __stdcall MSVCRT_type_info_opnot_equals(type_info * _this, const type_info * rhs)
388{
389 TRACE("(%p %p) returning %d\n",_this,rhs,_this->name == rhs->name);
390 return _this->name != rhs->name;
391}
392
393/******************************************************************
394 * ??1type_info@@UAE@XZ (MSVCRT.@)
395 */
396void MSVCRT_type_info_dtor(type_info * _this)
397{
398 TRACE("(%p)\n",_this);
399 if (_this->data)
400 MSVCRT_free(_this->data);
401}
402
403/******************************************************************
404 * ?name@type_info@@QBEPBDXZ (MSVCRT.@)
405 */
406const char * __stdcall MSVCRT_type_info_name(type_info * _this)
407{
408 TRACE("(%p) returning %s\n",_this,_this->name);
409 return _this->name;
410}
411
412/******************************************************************
413 * ?raw_name@type_info@@QBEPBDXZ (MSVCRT.@)
414 */
415const char * __stdcall MSVCRT_type_info_raw_name(type_info * _this)
416{
417 TRACE("(%p) returning %s\n",_this,_this->name);
418 return _this->name;
419}
420
421
422/******************************************************************
423 * __RTtypeid (MSVCRT.@)
424 */
425type_info* MSVCRT___RTtypeid(type_info *cppobj)
426{
427 /* Note: cppobj _isn't_ a type_info, we use that struct for its vtable ptr */
428 TRACE("(%p)\n",cppobj);
429
430 if (!IsBadReadPtr(cppobj, sizeof(void *)) &&
431 !IsBadReadPtr(cppobj->vtable - 1,sizeof(void *)) &&
432 !IsBadReadPtr((void*)cppobj->vtable[-1], sizeof(rtti_object_locator)))
433 {
434 rtti_object_locator *obj_locator = (rtti_object_locator *)cppobj->vtable[-1];
435 return obj_locator->type_descriptor;
436 }
437 /* FIXME: throw a C++ exception */
438 FIXME("Should throw(bad_typeid). Creating NULL reference, expect crash!\n");
439 return NULL;
440}
441
442/******************************************************************
443 * __RTDynamicCast (MSVCRT.@)
444 */
445void* MSVCRT___RTDynamicCast(type_info *cppobj, int unknown,
446 type_info *src, type_info *dst,
447 int do_throw)
448{
449 /* Note: cppobj _isn't_ a type_info, we use that struct for its vtable ptr */
450 TRACE("(%p,%d,%p,%p,%d)\n",cppobj, unknown, src, dst, do_throw);
451
452 if (unknown)
453 FIXME("Unknown prameter is non-zero: please report\n");
454
455 /* To cast an object at runtime:
456 * 1.Find out the true type of the object from the typeinfo at vtable[-1]
457 * 2.Search for the destination type in the class heirachy
458 * 3.If destination type is found, return base object address + dest offset
459 * Otherwise, fail the cast
460 */
461 if (!IsBadReadPtr(cppobj, sizeof(void *)) &&
462 !IsBadReadPtr(cppobj->vtable - 1,sizeof(void *)) &&
463 !IsBadReadPtr((void*)cppobj->vtable[-1], sizeof(rtti_object_locator)))
464 {
465 int count = 0;
466 rtti_object_locator *obj_locator = (rtti_object_locator *)cppobj->vtable[-1];
467 rtti_object_hierachy *obj_bases = obj_locator->type_hierachy;
468 rtti_base_descriptor **base_desc = obj_bases->base_classes->bases;
469 int src_offset = obj_locator->base_class_offset, dst_offset = -1;
470
471 while (count < obj_bases->array_len)
472 {
473 type_info *typ = (*base_desc)->type_descriptor;
474
475 if (!strcmp(typ->name, dst->name))
476 {
477 dst_offset = (*base_desc)->base_class_offset;
478 break;
479 }
480 base_desc++;
481 count++;
482 }
483 if (dst_offset >= 0)
484 return (void*)((unsigned long)cppobj - src_offset + dst_offset);
485 }
486
487 /* VC++ sets do_throw to 1 when the result of a dynamic_cast is assigned
488 * to a reference, since references cannot be NULL.
489 */
490 if (do_throw)
491 FIXME("Should throw(bad_cast). Creating NULL reference, expect crash!\n");
492 return NULL;
493}
494
495
496/******************************************************************
497 * __RTCastToVoid (MSVCRT.@)
498 */
499void* MSVCRT___RTCastToVoid(type_info *cppobj)
500{
501 /* Note: cppobj _isn't_ a type_info, we use that struct for its vtable ptr */
502 TRACE("(%p)\n",cppobj);
503
504 /* Casts to void* simply cast to the base object */
505 if (!IsBadReadPtr(cppobj, sizeof(void *)) &&
506 !IsBadReadPtr(cppobj->vtable - 1,sizeof(void *)) &&
507 !IsBadReadPtr((void*)cppobj->vtable[-1], sizeof(rtti_object_locator)))
508 {
509 rtti_object_locator *obj_locator = (rtti_object_locator *)cppobj->vtable[-1];
510 int src_offset = obj_locator->base_class_offset;
511
512 return (void*)((unsigned long)cppobj - src_offset);
513 }
514 return NULL;
515}
516
517
518/* INTERNAL: Set up vtables
519 * FIXME:should be static, cope with versions?
520 */
521void msvcrt_init_vtables(void)
522{
523 exception_vtable[0] = MSVCRT_exception_dtor;
524 exception_vtable[1] = (void*)MSVCRT_what_exception;
525
526 bad_typeid_vtable[0] = MSVCRT_bad_typeid_dtor;
527 bad_typeid_vtable[1] = exception_vtable[1];
528 bad_typeid_vtable[2] = _purecall; /* FIXME */
529
530 __non_rtti_object_vtable[0] = MSVCRT___non_rtti_object_dtor;
531 __non_rtti_object_vtable[1] = bad_typeid_vtable[1];
532 __non_rtti_object_vtable[2] = bad_typeid_vtable[2];
533
534 bad_cast_vtable[0] = MSVCRT_bad_cast_dtor;
535 bad_cast_vtable[1] = exception_vtable[1];
536 bad_cast_vtable[2] = _purecall; /* FIXME */
537
538 type_info_vtable[0] = MSVCRT_type_info_dtor;
539
540}
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