Sweden-Number/dlls/msvcrt/cpp.c

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/*
* msvcrt.dll C++ objects
*
* Copyright 2000 Jon Griffiths
*/
#include "msvcrt.h"
#include "msvcrt/eh.h"
#include "msvcrt/malloc.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
typedef void (*v_table_ptr)();
static v_table_ptr exception_vtable[2];
static v_table_ptr bad_typeid_vtable[3];
static v_table_ptr __non_rtti_object_vtable[3];
static v_table_ptr bad_cast_vtable[3];
static v_table_ptr type_info_vtable[1];
typedef struct __exception
{
v_table_ptr *vtable;
const char *name;
int do_free; /* FIXME: 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;
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??0exception@@QAE@ABQBD@Z (MSVCRT.@)
*/
void MSVCRT_exception_ctor(exception * _this, const char ** name)
{
TRACE("(%p %s)\n",_this,*name);
_this->vtable = exception_vtable;
_this->name = *name;
TRACE("name = %s\n",_this->name);
_this->do_free = 0; /* FIXME */
}
/******************************************************************
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* ??0exception@@QAE@ABV0@@Z (MSVCRT.@)
*/
void MSVCRT_exception_copy_ctor(exception * _this, const exception * rhs)
{
TRACE("(%p %p)\n",_this,rhs);
if (_this != rhs)
memcpy (_this, rhs, sizeof (*_this));
TRACE("name = %s\n",_this->name);
}
/******************************************************************
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* ??0exception@@QAE@XZ (MSVCRT.@)
*/
void MSVCRT_exception_default_ctor(exception * _this)
{
TRACE("(%p)\n",_this);
_this->vtable = exception_vtable;
_this->name = "";
_this->do_free = 0; /* FIXME */
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??1exception@@UAE@XZ (MSVCRT.@)
*/
void MSVCRT_exception_dtor(exception * _this)
{
TRACE("(%p)\n",_this);
}
/******************************************************************
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* ??4exception@@QAEAAV0@ABV0@@Z (MSVCRT.@)
*/
exception * MSVCRT_exception_opequals(exception * _this, const exception * rhs)
{
TRACE("(%p %p)\n",_this,rhs);
memcpy (_this, rhs, sizeof (*_this));
TRACE("name = %s\n",_this->name);
return _this;
}
/******************************************************************
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* ??_Eexception@@UAEPAXI@Z (MSVCRT.@)
*/
void * MSVCRT_exception__unknown_E(exception * _this, unsigned int arg1)
{
TRACE("(%p %d)\n",_this,arg1);
_purecall();
return NULL;
}
/******************************************************************
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* ??_Gexception@@UAEPAXI@Z (MSVCRT.@)
*/
void * MSVCRT_exception__unknown_G(exception * _this, unsigned int arg1)
{
TRACE("(%p %d)\n",_this,arg1);
_purecall();
return NULL;
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ?what@exception@@UBEPBDXZ (MSVCRT.@)
*/
const char * MSVCRT_what_exception(exception * _this)
{
TRACE("(%p) returning %s\n",_this,_this->name);
return _this->name;
}
static terminate_function func_terminate=NULL;
static unexpected_function func_unexpected=NULL;
/******************************************************************
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* ?set_terminate@@YAP6AXXZP6AXXZ@Z (MSVCRT.@)
*/
terminate_function MSVCRT_set_terminate(terminate_function func)
{
terminate_function previous=func_terminate;
TRACE("(%p) returning %p\n",func,previous);
func_terminate=func;
return previous;
}
/******************************************************************
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* ?set_unexpected@@YAP6AXXZP6AXXZ@Z (MSVCRT.@)
*/
unexpected_function MSVCRT_set_unexpected(unexpected_function func)
{
unexpected_function previous=func_unexpected;
TRACE("(%p) returning %p\n",func,previous);
func_unexpected=func;
return previous;
}
/******************************************************************
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* ?terminate@@YAXXZ (MSVCRT.@)
*/
void MSVCRT_terminate()
{
(*func_terminate)();
}
/******************************************************************
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* ?unexpected@@YAXXZ (MSVCRT.@)
*/
void MSVCRT_unexpected()
{
(*func_unexpected)();
}
/******************************************************************
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* ??0bad_typeid@@QAE@ABV0@@Z (MSVCRT.@)
*/
void 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);
}
/******************************************************************
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* ??0bad_typeid@@QAE@PBD@Z (MSVCRT.@)
*/
void 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 = bad_typeid_vtable;
}
/******************************************************************
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* ??1bad_typeid@@UAE@XZ (MSVCRT.@)
*/
void MSVCRT_bad_typeid_dtor(bad_typeid * _this)
{
TRACE("(%p)\n",_this);
MSVCRT_exception_dtor(&_this->base);
}
/******************************************************************
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* ??4bad_typeid@@QAEAAV0@ABV0@@Z (MSVCRT.@)
*/
bad_typeid * MSVCRT_bad_typeid_opequals(bad_typeid * _this, const bad_typeid * rhs)
{
TRACE("(%p %p)\n",_this,rhs);
MSVCRT_exception_copy_ctor(&_this->base,&rhs->base);
return _this;
}
/******************************************************************
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* ??0__non_rtti_object@@QAE@ABV0@@Z (MSVCRT.@)
*/
void 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);
}
/******************************************************************
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* ??0__non_rtti_object@@QAE@PBD@Z (MSVCRT.@)
*/
void 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 = __non_rtti_object_vtable;
}
/******************************************************************
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* ??1__non_rtti_object@@UAE@XZ (MSVCRT.@)
*/
void MSVCRT___non_rtti_object_dtor(__non_rtti_object * _this)
{
TRACE("(%p)\n",_this);
MSVCRT_bad_typeid_dtor(&_this->base);
}
/******************************************************************
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* ??4__non_rtti_object@@QAEAAV0@ABV0@@Z (MSVCRT.@)
*/
__non_rtti_object * MSVCRT___non_rtti_object_opequals(__non_rtti_object * _this,
const __non_rtti_object *rhs)
{
TRACE("(%p %p)\n",_this,rhs);
memcpy (_this, rhs, sizeof (*_this));
TRACE("name = %s\n",_this->base.base.name);
return _this;
}
/******************************************************************
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* ??_E__non_rtti_object@@UAEPAXI@Z (MSVCRT.@)
*/
void * MSVCRT___non_rtti_object__unknown_E(__non_rtti_object * _this, unsigned int arg1)
{
TRACE("(%p %d)\n",_this,arg1);
_purecall();
return NULL;
}
/******************************************************************
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* ??_G__non_rtti_object@@UAEPAXI@Z (MSVCRT.@)
*/
void * MSVCRT___non_rtti_object__unknown_G(__non_rtti_object * _this, unsigned int arg1)
{
TRACE("(%p %d)\n",_this,arg1);
_purecall();
return NULL;
}
/******************************************************************
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* ??0bad_cast@@QAE@ABQBD@Z (MSVCRT.@)
*/
void 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 = bad_cast_vtable;
}
/******************************************************************
2001-07-02 21:59:40 +02:00
* ??0bad_cast@@QAE@ABV0@@Z (MSVCRT.@)
*/
void 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);
}
/******************************************************************
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* ??1bad_cast@@UAE@XZ (MSVCRT.@)
*/
void MSVCRT_bad_cast_dtor(bad_cast * _this)
{
TRACE("(%p)\n",_this);
MSVCRT_exception_dtor(&_this->base);
}
/******************************************************************
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* ??4bad_cast@@QAEAAV0@ABV0@@Z (MSVCRT.@)
*/
bad_cast * MSVCRT_bad_cast_opequals(bad_cast * _this, const bad_cast * rhs)
{
TRACE("(%p %p)\n",_this,rhs);
MSVCRT_exception_copy_ctor(&_this->base,&rhs->base);
return _this;
}
/******************************************************************
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* ??8type_info@@QBEHABV0@@Z (MSVCRT.@)
*/
int __stdcall MSVCRT_type_info_opequals_equals(type_info * _this, const type_info * rhs)
{
TRACE("(%p %p) returning %d\n",_this,rhs,_this->name == rhs->name);
return _this->name == rhs->name;
}
/******************************************************************
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* ??9type_info@@QBEHABV0@@Z (MSVCRT.@)
*/
int __stdcall MSVCRT_type_info_opnot_equals(type_info * _this, const type_info * rhs)
{
TRACE("(%p %p) returning %d\n",_this,rhs,_this->name == rhs->name);
return _this->name != rhs->name;
}
/******************************************************************
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* ??1type_info@@UAE@XZ (MSVCRT.@)
*/
void MSVCRT_type_info_dtor(type_info * _this)
{
TRACE("(%p)\n",_this);
if (_this->data)
MSVCRT_free(_this->data);
}
/******************************************************************
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* ?name@type_info@@QBEPBDXZ (MSVCRT.@)
*/
const char * __stdcall MSVCRT_type_info_name(type_info * _this)
{
TRACE("(%p) returning %s\n",_this,_this->name);
return _this->name;
}
/******************************************************************
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* ?raw_name@type_info@@QBEPBDXZ (MSVCRT.@)
*/
const char * __stdcall MSVCRT_type_info_raw_name(type_info * _this)
{
TRACE("(%p) returning %s\n",_this,_this->name);
return _this->name;
}
/******************************************************************
* __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;
}
/* INTERNAL: Set up vtables
* FIXME:should be static, cope with versions?
*/
void msvcrt_init_vtables(void)
{
exception_vtable[0] = MSVCRT_exception_dtor;
exception_vtable[1] = (void*)MSVCRT_what_exception;
bad_typeid_vtable[0] = MSVCRT_bad_typeid_dtor;
bad_typeid_vtable[1] = exception_vtable[1];
bad_typeid_vtable[2] = _purecall; /* FIXME */
__non_rtti_object_vtable[0] = MSVCRT___non_rtti_object_dtor;
__non_rtti_object_vtable[1] = bad_typeid_vtable[1];
__non_rtti_object_vtable[2] = bad_typeid_vtable[2];
bad_cast_vtable[0] = MSVCRT_bad_cast_dtor;
bad_cast_vtable[1] = exception_vtable[1];
bad_cast_vtable[2] = _purecall; /* FIXME */
type_info_vtable[0] = MSVCRT_type_info_dtor;
}