Sweden-Number/dlls/msvcrt/cpp.c

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/*
* msvcrt.dll C++ objects
*
* Copyright 2000 Jon Griffiths
* Copyright 2003 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "wine/port.h"
#include "msvcrt.h"
#include "msvcrt/eh.h"
#include "msvcrt/stdlib.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
typedef void (*v_table_ptr)();
typedef struct __exception
{
v_table_ptr *vtable;
char *name;
int do_free; /* take string copy with char* ctor? */
} exception;
typedef struct __bad_typeid
{
exception base;
} bad_typeid;
typedef struct ____non_rtti_object
{
bad_typeid base;
} __non_rtti_object;
typedef struct __bad_cast
{
exception base;
} bad_cast;
typedef struct __type_info
{
v_table_ptr *vtable;
void *data;
char name[1];
} type_info;
typedef struct _rtti_base_descriptor
{
type_info *type_descriptor;
int num_base_classes;
int base_class_offset;
unsigned int flags;
} rtti_base_descriptor;
typedef struct _rtti_base_array
{
rtti_base_descriptor *bases[1]; /* First element is the class itself */
} rtti_base_array;
typedef struct _rtti_object_hierachy
{
int unknown1;
int unknown2;
int array_len; /* Size of the array pointed to by 'base_classes' */
rtti_base_array *base_classes;
} rtti_object_hierachy;
typedef struct _rtti_object_locator
{
int unknown1;
int base_class_offset;
unsigned int flags;
type_info *type_descriptor;
rtti_object_hierachy *type_hierachy;
} rtti_object_locator;
#ifdef __i386__ /* thiscall functions are i386-specific */
#define DEFINE_THISCALL_WRAPPER(func) \
extern void __thiscall_ ## func(); \
__ASM_GLOBAL_FUNC(__thiscall_ ## func, \
"popl %eax\n\t" \
"pushl %ecx\n\t" \
"pushl %eax\n\t" \
"jmp " __ASM_NAME(#func) )
v_table_ptr MSVCRT_exception_vtable[];
v_table_ptr MSVCRT_bad_typeid_vtable[];
v_table_ptr MSVCRT_bad_cast_vtable[];
v_table_ptr MSVCRT___non_rtti_object_vtable[];
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??0exception@@QAE@ABQBD@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_exception_ctor);
exception * __stdcall MSVCRT_exception_ctor(exception * _this, const char ** name)
{
TRACE("(%p %s)\n",_this,*name);
_this->vtable = MSVCRT_exception_vtable;
_this->name = MSVCRT_operator_new(strlen(*name)+1);
if (_this->name) strcpy( _this->name, *name );
_this->do_free = TRUE;
return _this;
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??0exception@@QAE@ABV0@@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_exception_copy_ctor);
exception * __stdcall MSVCRT_exception_copy_ctor(exception * _this, const exception * rhs)
{
TRACE("(%p %p)\n",_this,rhs);
_this->vtable = MSVCRT_exception_vtable;
_this->do_free = rhs->do_free;
if (!_this->do_free) _this->name = rhs->name;
else
{
_this->name = MSVCRT_operator_new(strlen(rhs->name)+1);
if (_this->name) strcpy( _this->name, rhs->name );
}
TRACE("name = %s\n",_this->name);
return _this;
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??0exception@@QAE@XZ (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_exception_default_ctor);
exception * __stdcall MSVCRT_exception_default_ctor(exception * _this)
{
TRACE("(%p)\n",_this);
_this->vtable = MSVCRT_exception_vtable;
_this->name = NULL;
_this->do_free = FALSE;
return _this;
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??1exception@@UAE@XZ (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_exception_dtor);
void __stdcall MSVCRT_exception_dtor(exception * _this)
{
TRACE("(%p)\n",_this);
_this->vtable = MSVCRT_exception_vtable;
if (_this->do_free) MSVCRT_operator_delete(_this->name);
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??4exception@@QAEAAV0@ABV0@@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_exception_opequals);
exception * __stdcall MSVCRT_exception_opequals(exception * _this, const exception * rhs)
{
TRACE("(%p %p)\n",_this,rhs);
if (_this != rhs)
{
MSVCRT_exception_dtor(_this);
MSVCRT_exception_copy_ctor(_this, rhs);
}
TRACE("name = %s\n",_this->name);
return _this;
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??_Eexception@@UAEPAXI@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_exception_vector_dtor);
void * __stdcall MSVCRT_exception_vector_dtor(exception * _this, unsigned int flags)
{
TRACE("(%p %x)\n",_this,flags);
if (flags & 2)
{
/* we have an array, with the number of elements stored before the first object */
int i, *ptr = (int *)_this - 1;
for (i = *ptr - 1; i >= 0; i--) MSVCRT_exception_dtor(_this + i);
MSVCRT_operator_delete(ptr);
}
else
{
MSVCRT_exception_dtor(_this);
if (flags & 1) MSVCRT_operator_delete(_this);
}
return _this;
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??_Gexception@@UAEPAXI@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_exception_scalar_dtor);
void * __stdcall MSVCRT_exception_scalar_dtor(exception * _this, unsigned int flags)
{
TRACE("(%p %x)\n",_this,flags);
MSVCRT_exception_dtor(_this);
if (flags & 1) MSVCRT_operator_delete(_this);
return _this;
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ?what@exception@@UBEPBDXZ (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_what_exception);
const char * __stdcall MSVCRT_what_exception(exception * _this)
{
TRACE("(%p) returning %s\n",_this,_this->name);
return _this->name ? _this->name : "Unknown exception";
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??0bad_typeid@@QAE@ABV0@@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_bad_typeid_copy_ctor);
bad_typeid * __stdcall MSVCRT_bad_typeid_copy_ctor(bad_typeid * _this, const bad_typeid * rhs)
{
TRACE("(%p %p)\n",_this,rhs);
MSVCRT_exception_copy_ctor(&_this->base,&rhs->base);
_this->base.vtable = MSVCRT_bad_typeid_vtable;
return _this;
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??0bad_typeid@@QAE@PBD@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_bad_typeid_ctor);
bad_typeid * __stdcall MSVCRT_bad_typeid_ctor(bad_typeid * _this, const char * name)
{
TRACE("(%p %s)\n",_this,name);
MSVCRT_exception_ctor(&_this->base, &name);
_this->base.vtable = MSVCRT_bad_typeid_vtable;
return _this;
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??1bad_typeid@@UAE@XZ (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_bad_typeid_dtor);
void __stdcall MSVCRT_bad_typeid_dtor(bad_typeid * _this)
{
TRACE("(%p)\n",_this);
MSVCRT_exception_dtor(&_this->base);
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??4bad_typeid@@QAEAAV0@ABV0@@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_bad_typeid_opequals);
bad_typeid * __stdcall MSVCRT_bad_typeid_opequals(bad_typeid * _this, const bad_typeid * rhs)
{
TRACE("(%p %p)\n",_this,rhs);
MSVCRT_exception_opequals(&_this->base,&rhs->base);
return _this;
}
/******************************************************************
* ??_Ebad_typeid@@UAEPAXI@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_bad_typeid_vector_dtor);
void * __stdcall MSVCRT_bad_typeid_vector_dtor(bad_typeid * _this, unsigned int flags)
{
TRACE("(%p %x)\n",_this,flags);
if (flags & 2)
{
/* we have an array, with the number of elements stored before the first object */
int i, *ptr = (int *)_this - 1;
for (i = *ptr - 1; i >= 0; i--) MSVCRT_bad_typeid_dtor(_this + i);
MSVCRT_operator_delete(ptr);
}
else
{
MSVCRT_bad_typeid_dtor(_this);
if (flags & 1) MSVCRT_operator_delete(_this);
}
return _this;
}
/******************************************************************
* ??_Gbad_typeid@@UAEPAXI@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_bad_typeid_scalar_dtor);
void * __stdcall MSVCRT_bad_typeid_scalar_dtor(bad_typeid * _this, unsigned int flags)
{
TRACE("(%p %x)\n",_this,flags);
MSVCRT_bad_typeid_dtor(_this);
if (flags & 1) MSVCRT_operator_delete(_this);
return _this;
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??0__non_rtti_object@@QAE@ABV0@@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT___non_rtti_object_copy_ctor);
__non_rtti_object * __stdcall MSVCRT___non_rtti_object_copy_ctor(__non_rtti_object * _this,
const __non_rtti_object * rhs)
{
TRACE("(%p %p)\n",_this,rhs);
MSVCRT_bad_typeid_copy_ctor(&_this->base,&rhs->base);
_this->base.base.vtable = MSVCRT___non_rtti_object_vtable;
return _this;
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??0__non_rtti_object@@QAE@PBD@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT___non_rtti_object_ctor);
__non_rtti_object * __stdcall MSVCRT___non_rtti_object_ctor(__non_rtti_object * _this,
const char * name)
{
TRACE("(%p %s)\n",_this,name);
MSVCRT_bad_typeid_ctor(&_this->base,name);
_this->base.base.vtable = MSVCRT___non_rtti_object_vtable;
return _this;
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??1__non_rtti_object@@UAE@XZ (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT___non_rtti_object_dtor);
void __stdcall MSVCRT___non_rtti_object_dtor(__non_rtti_object * _this)
{
TRACE("(%p)\n",_this);
MSVCRT_bad_typeid_dtor(&_this->base);
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??4__non_rtti_object@@QAEAAV0@ABV0@@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT___non_rtti_object_opequals);
__non_rtti_object * __stdcall MSVCRT___non_rtti_object_opequals(__non_rtti_object * _this,
const __non_rtti_object *rhs)
{
TRACE("(%p %p)\n",_this,rhs);
MSVCRT_bad_typeid_opequals( &_this->base, &rhs->base );
return _this;
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??_E__non_rtti_object@@UAEPAXI@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT___non_rtti_object_vector_dtor);
void * __stdcall MSVCRT___non_rtti_object_vector_dtor(__non_rtti_object * _this, unsigned int flags)
{
TRACE("(%p %x)\n",_this,flags);
if (flags & 2)
{
/* we have an array, with the number of elements stored before the first object */
int i, *ptr = (int *)_this - 1;
for (i = *ptr - 1; i >= 0; i--) MSVCRT___non_rtti_object_dtor(_this + i);
MSVCRT_operator_delete(ptr);
}
else
{
MSVCRT___non_rtti_object_dtor(_this);
if (flags & 1) MSVCRT_operator_delete(_this);
}
return _this;
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??_G__non_rtti_object@@UAEPAXI@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT___non_rtti_object_scalar_dtor);
void * __stdcall MSVCRT___non_rtti_object_scalar_dtor(__non_rtti_object * _this, unsigned int flags)
{
TRACE("(%p %x)\n",_this,flags);
MSVCRT___non_rtti_object_dtor(_this);
if (flags & 1) MSVCRT_operator_delete(_this);
return _this;
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??0bad_cast@@QAE@ABQBD@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_bad_cast_ctor);
bad_cast * __stdcall MSVCRT_bad_cast_ctor(bad_cast * _this, const char ** name)
{
TRACE("(%p %s)\n",_this,*name);
MSVCRT_exception_ctor(&_this->base, name);
_this->base.vtable = MSVCRT_bad_cast_vtable;
return _this;
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??0bad_cast@@QAE@ABV0@@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_bad_cast_copy_ctor);
bad_cast * __stdcall MSVCRT_bad_cast_copy_ctor(bad_cast * _this, const bad_cast * rhs)
{
TRACE("(%p %p)\n",_this,rhs);
MSVCRT_exception_copy_ctor(&_this->base,&rhs->base);
_this->base.vtable = MSVCRT_bad_cast_vtable;
return _this;
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??1bad_cast@@UAE@XZ (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_bad_cast_dtor);
void __stdcall MSVCRT_bad_cast_dtor(bad_cast * _this)
{
TRACE("(%p)\n",_this);
MSVCRT_exception_dtor(&_this->base);
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??4bad_cast@@QAEAAV0@ABV0@@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_bad_cast_opequals);
bad_cast * __stdcall MSVCRT_bad_cast_opequals(bad_cast * _this, const bad_cast * rhs)
{
TRACE("(%p %p)\n",_this,rhs);
MSVCRT_exception_opequals(&_this->base,&rhs->base);
return _this;
}
/******************************************************************
* ??_Ebad_cast@@UAEPAXI@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_bad_cast_vector_dtor);
void * __stdcall MSVCRT_bad_cast_vector_dtor(bad_cast * _this, unsigned int flags)
{
TRACE("(%p %x)\n",_this,flags);
if (flags & 2)
{
/* we have an array, with the number of elements stored before the first object */
int i, *ptr = (int *)_this - 1;
for (i = *ptr - 1; i >= 0; i--) MSVCRT_bad_cast_dtor(_this + i);
MSVCRT_operator_delete(ptr);
}
else
{
MSVCRT_bad_cast_dtor(_this);
if (flags & 1) MSVCRT_operator_delete(_this);
}
return _this;
}
/******************************************************************
* ??_Gbad_cast@@UAEPAXI@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_bad_cast_scalar_dtor);
void * __stdcall MSVCRT_bad_cast_scalar_dtor(bad_cast * _this, unsigned int flags)
{
TRACE("(%p %x)\n",_this,flags);
MSVCRT_bad_cast_dtor(_this);
if (flags & 1) MSVCRT_operator_delete(_this);
return _this;
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??8type_info@@QBEHABV0@@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_type_info_opequals_equals);
int __stdcall MSVCRT_type_info_opequals_equals(type_info * _this, const type_info * rhs)
{
int ret = !strcmp(_this->name,rhs->name);
TRACE("(%p %p) returning %d\n",_this,rhs,ret);
return ret;
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??9type_info@@QBEHABV0@@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_type_info_opnot_equals);
int __stdcall MSVCRT_type_info_opnot_equals(type_info * _this, const type_info * rhs)
{
int ret = !!strcmp(_this->name,rhs->name);
TRACE("(%p %p) returning %d\n",_this,rhs,ret);
return ret;
}
/******************************************************************
* ?before@type_info@@QBEHABV1@@Z (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_type_info_before);
int __stdcall MSVCRT_type_info_before(type_info * _this, const type_info * rhs)
{
int ret = strcmp(_this->name,rhs->name) < 0;
TRACE("(%p %p) returning %d\n",_this,rhs,ret);
return ret;
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??1type_info@@UAE@XZ (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_type_info_dtor);
void __stdcall MSVCRT_type_info_dtor(type_info * _this)
{
TRACE("(%p)\n",_this);
if (_this->data)
MSVCRT_free(_this->data);
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ?name@type_info@@QBEPBDXZ (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_type_info_name);
const char * __stdcall MSVCRT_type_info_name(type_info * _this)
{
TRACE("(%p) returning %s\n",_this,_this->name);
return _this->name;
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ?raw_name@type_info@@QBEPBDXZ (MSVCRT.@)
*/
DEFINE_THISCALL_WRAPPER(MSVCRT_type_info_raw_name);
const char * __stdcall MSVCRT_type_info_raw_name(type_info * _this)
{
TRACE("(%p) returning %s\n",_this,_this->name);
return _this->name;
}
/* vtables */
v_table_ptr MSVCRT_exception_vtable[2] =
{
__thiscall_MSVCRT_exception_vector_dtor,
__thiscall_MSVCRT_what_exception
};
v_table_ptr MSVCRT_bad_typeid_vtable[2] =
{
__thiscall_MSVCRT_bad_typeid_vector_dtor,
__thiscall_MSVCRT_what_exception
};
v_table_ptr MSVCRT_bad_cast_vtable[2] =
{
__thiscall_MSVCRT_bad_cast_vector_dtor,
__thiscall_MSVCRT_what_exception
};
v_table_ptr MSVCRT___non_rtti_object_vtable[2] =
{
__thiscall_MSVCRT___non_rtti_object_vector_dtor,
__thiscall_MSVCRT_what_exception
};
#endif /* __i386__ */
/******************************************************************
* ?set_terminate@@YAP6AXXZP6AXXZ@Z (MSVCRT.@)
*/
terminate_function MSVCRT_set_terminate(terminate_function func)
{
MSVCRT_thread_data *data = msvcrt_get_thread_data();
terminate_function previous = data->terminate_handler;
TRACE("(%p) returning %p\n",func,previous);
data->terminate_handler = func;
return previous;
}
/******************************************************************
* ?set_unexpected@@YAP6AXXZP6AXXZ@Z (MSVCRT.@)
*/
unexpected_function MSVCRT_set_unexpected(unexpected_function func)
{
MSVCRT_thread_data *data = msvcrt_get_thread_data();
unexpected_function previous = data->unexpected_handler;
TRACE("(%p) returning %p\n",func,previous);
data->unexpected_handler = func;
return previous;
}
/******************************************************************
* ?_set_se_translator@@YAP6AXIPAU_EXCEPTION_POINTERS@@@ZP6AXI0@Z@Z (MSVCRT.@)
*/
_se_translator_function MSVCRT__set_se_translator(_se_translator_function func)
{
MSVCRT_thread_data *data = msvcrt_get_thread_data();
_se_translator_function previous = data->se_translator;
TRACE("(%p) returning %p\n",func,previous);
data->se_translator = func;
return previous;
}
/******************************************************************
* ?terminate@@YAXXZ (MSVCRT.@)
*/
void MSVCRT_terminate(void)
{
MSVCRT_thread_data *data = msvcrt_get_thread_data();
if (data->terminate_handler) data->terminate_handler();
MSVCRT_abort();
}
/******************************************************************
* ?unexpected@@YAXXZ (MSVCRT.@)
*/
void MSVCRT_unexpected(void)
{
MSVCRT_thread_data *data = msvcrt_get_thread_data();
if (data->unexpected_handler) data->unexpected_handler();
MSVCRT_terminate();
}
/******************************************************************
* __RTtypeid (MSVCRT.@)
*/
type_info* MSVCRT___RTtypeid(type_info *cppobj)
{
/* Note: cppobj _isn't_ a type_info, we use that struct for its vtable ptr */
TRACE("(%p)\n",cppobj);
if (!IsBadReadPtr(cppobj, sizeof(void *)) &&
!IsBadReadPtr(cppobj->vtable - 1,sizeof(void *)) &&
!IsBadReadPtr((void*)cppobj->vtable[-1], sizeof(rtti_object_locator)))
{
rtti_object_locator *obj_locator = (rtti_object_locator *)cppobj->vtable[-1];
return obj_locator->type_descriptor;
}
/* FIXME: throw a C++ exception */
FIXME("Should throw(bad_typeid). Creating NULL reference, expect crash!\n");
return NULL;
}
/******************************************************************
* __RTDynamicCast (MSVCRT.@)
*/
void* MSVCRT___RTDynamicCast(type_info *cppobj, int unknown,
type_info *src, type_info *dst,
int do_throw)
{
/* Note: cppobj _isn't_ a type_info, we use that struct for its vtable ptr */
TRACE("(%p,%d,%p,%p,%d)\n",cppobj, unknown, src, dst, do_throw);
if (unknown)
FIXME("Unknown prameter is non-zero: please report\n");
/* To cast an object at runtime:
* 1.Find out the true type of the object from the typeinfo at vtable[-1]
* 2.Search for the destination type in the class heirachy
* 3.If destination type is found, return base object address + dest offset
* Otherwise, fail the cast
*/
if (!IsBadReadPtr(cppobj, sizeof(void *)) &&
!IsBadReadPtr(cppobj->vtable - 1,sizeof(void *)) &&
!IsBadReadPtr((void*)cppobj->vtable[-1], sizeof(rtti_object_locator)))
{
int count = 0;
rtti_object_locator *obj_locator = (rtti_object_locator *)cppobj->vtable[-1];
rtti_object_hierachy *obj_bases = obj_locator->type_hierachy;
rtti_base_descriptor **base_desc = obj_bases->base_classes->bases;
int src_offset = obj_locator->base_class_offset, dst_offset = -1;
while (count < obj_bases->array_len)
{
type_info *typ = (*base_desc)->type_descriptor;
if (!strcmp(typ->name, dst->name))
{
dst_offset = (*base_desc)->base_class_offset;
break;
}
base_desc++;
count++;
}
if (dst_offset >= 0)
return (void*)((unsigned long)cppobj - src_offset + dst_offset);
}
/* VC++ sets do_throw to 1 when the result of a dynamic_cast is assigned
* to a reference, since references cannot be NULL.
*/
if (do_throw)
FIXME("Should throw(bad_cast). Creating NULL reference, expect crash!\n");
return NULL;
}
/******************************************************************
* __RTCastToVoid (MSVCRT.@)
*/
void* MSVCRT___RTCastToVoid(type_info *cppobj)
{
/* Note: cppobj _isn't_ a type_info, we use that struct for its vtable ptr */
TRACE("(%p)\n",cppobj);
/* Casts to void* simply cast to the base object */
if (!IsBadReadPtr(cppobj, sizeof(void *)) &&
!IsBadReadPtr(cppobj->vtable - 1,sizeof(void *)) &&
!IsBadReadPtr((void*)cppobj->vtable[-1], sizeof(rtti_object_locator)))
{
rtti_object_locator *obj_locator = (rtti_object_locator *)cppobj->vtable[-1];
int src_offset = obj_locator->base_class_offset;
return (void*)((unsigned long)cppobj - src_offset);
}
return NULL;
}