mirror of
https://github.com/pmret/gcc-papermario.git
synced 2024-11-08 11:53:01 +01:00
324 lines
8.7 KiB
C++
324 lines
8.7 KiB
C++
// Methods for type_info for -*- C++ -*- Run Time Type Identification.
|
|
// Copyright (C) 1994, 1996 Free Software Foundation
|
|
|
|
// This file is part of GNU CC.
|
|
|
|
// GNU CC is free software; you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation; either version 2, or (at your option)
|
|
// any later version.
|
|
|
|
// GNU CC 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 General Public License for more details.
|
|
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with GNU CC; see the file COPYING. If not, write to
|
|
// the Free Software Foundation, 59 Temple Place - Suite 330,
|
|
// Boston, MA 02111-1307, USA.
|
|
|
|
// As a special exception, if you link this library with other files,
|
|
// some of which are compiled with GCC, to produce an executable,
|
|
// this library does not by itself cause the resulting executable
|
|
// to be covered by the GNU General Public License.
|
|
// This exception does not however invalidate any other reasons why
|
|
// the executable file might be covered by the GNU General Public License.
|
|
|
|
#include <stddef.h>
|
|
#include "tinfo.h"
|
|
#include "new" // for placement new
|
|
|
|
// service function for comparing types by name.
|
|
|
|
static inline int
|
|
fast_compare (const char *n1, const char *n2) {
|
|
int c;
|
|
if (n1 == n2) return 0;
|
|
if (n1 == 0) return *n2;
|
|
else if (n2 == 0) return *n1;
|
|
|
|
c = (int)*n1++ - (int)*n2++;
|
|
return c == 0 ? strcmp (n1, n2) : c;
|
|
};
|
|
|
|
bool
|
|
type_info::before (const type_info &arg) const
|
|
{
|
|
return fast_compare (name (), arg.name ()) < 0;
|
|
}
|
|
|
|
#ifdef _WIN32
|
|
bool type_info::
|
|
operator== (const type_info& arg) const
|
|
{
|
|
return fast_compare (name (), arg.name ()) == 0;
|
|
}
|
|
|
|
bool type_info::
|
|
operator!= (const type_info& arg) const
|
|
{
|
|
return fast_compare (name (), arg.name ()) != 0;
|
|
}
|
|
#endif
|
|
|
|
// type info for pointer type.
|
|
|
|
struct __pointer_type_info : public type_info {
|
|
const type_info& type;
|
|
|
|
__pointer_type_info (const char *n, const type_info& ti)
|
|
: type_info (n), type (ti) {}
|
|
};
|
|
|
|
// type info for attributes
|
|
|
|
struct __attr_type_info : public type_info {
|
|
enum cv { NONE = 0, CONST = 1, VOLATILE = 2, CONSTVOL = 1 | 2 };
|
|
|
|
const type_info& type;
|
|
cv attr;
|
|
|
|
__attr_type_info (const char *n, cv a, const type_info& t)
|
|
: type_info (n), type (t), attr (a) {}
|
|
};
|
|
|
|
// type_info for builtin type
|
|
|
|
struct __builtin_type_info : public type_info {
|
|
__builtin_type_info (const char *n): type_info (n) {}
|
|
};
|
|
|
|
// type info for function.
|
|
|
|
struct __func_type_info : public type_info {
|
|
__func_type_info (const char *n) : type_info (n) {}
|
|
};
|
|
|
|
// type info for pointer to member function.
|
|
|
|
struct __ptmf_type_info : public type_info {
|
|
__ptmf_type_info (const char *n) : type_info (n) {}
|
|
};
|
|
|
|
// type info for pointer to data member.
|
|
|
|
struct __ptmd_type_info : public type_info {
|
|
__ptmd_type_info (const char *n): type_info (n) {}
|
|
};
|
|
|
|
// type info for array.
|
|
|
|
struct __array_type_info : public type_info {
|
|
__array_type_info (const char *n): type_info (n) {}
|
|
};
|
|
|
|
// Entry points for the compiler.
|
|
|
|
/* Low level match routine used by compiler to match types of catch
|
|
variables and thrown objects. */
|
|
|
|
extern "C" void*
|
|
__throw_type_match_rtti (void *catch_type_r, void *throw_type_r, void *objptr)
|
|
{
|
|
const type_info &catch_type = *(const type_info *)catch_type_r;
|
|
const type_info &throw_type = *(const type_info *)throw_type_r;
|
|
|
|
if (catch_type == throw_type)
|
|
return objptr;
|
|
|
|
#if 0
|
|
printf ("We want to match a %s against a %s!\n",
|
|
throw_type.name (), catch_type.name ());
|
|
#endif
|
|
|
|
void *new_objptr = 0;
|
|
|
|
if (const __user_type_info *p
|
|
= dynamic_cast <const __user_type_info *> (&throw_type))
|
|
{
|
|
/* The 1 skips conversions to private bases. */
|
|
new_objptr = p->dcast (catch_type, 1, objptr);
|
|
}
|
|
else if (const __pointer_type_info *fr =
|
|
dynamic_cast <const __pointer_type_info *> (&throw_type))
|
|
{
|
|
const __pointer_type_info *to =
|
|
dynamic_cast <const __pointer_type_info *> (&catch_type);
|
|
|
|
if (! to)
|
|
goto fail;
|
|
|
|
const type_info *subfr = &fr->type, *subto = &to->type;
|
|
__attr_type_info::cv cvfrom, cvto;
|
|
|
|
if (const __attr_type_info *at
|
|
= dynamic_cast <const __attr_type_info *> (subfr))
|
|
{
|
|
cvfrom = at->attr;
|
|
subfr = &at->type;
|
|
}
|
|
else
|
|
cvfrom = __attr_type_info::NONE;
|
|
|
|
if (const __attr_type_info *at
|
|
= dynamic_cast <const __attr_type_info *> (subto))
|
|
{
|
|
cvto = at->attr;
|
|
subto = &at->type;
|
|
}
|
|
else
|
|
cvto = __attr_type_info::NONE;
|
|
|
|
if (((cvfrom & __attr_type_info::CONST)
|
|
> (cvto & __attr_type_info::CONST))
|
|
|| ((cvfrom & __attr_type_info::VOLATILE)
|
|
> (cvto & __attr_type_info::VOLATILE)))
|
|
goto fail;
|
|
|
|
if (*subto == *subfr)
|
|
new_objptr = objptr;
|
|
else if (*subto == typeid (void)
|
|
&& dynamic_cast <const __func_type_info *> (subfr) == 0)
|
|
new_objptr = objptr;
|
|
else if (const __user_type_info *p
|
|
= dynamic_cast <const __user_type_info *> (subfr))
|
|
{
|
|
/* The 1 skips conversions to private bases. */
|
|
new_objptr = p->dcast (*subto, 1, objptr);
|
|
}
|
|
else if (const __pointer_type_info *pfr
|
|
= dynamic_cast <const __pointer_type_info *> (subfr))
|
|
{
|
|
// Multi-level pointer conversion.
|
|
|
|
const __pointer_type_info *pto
|
|
= dynamic_cast <const __pointer_type_info *> (subto);
|
|
|
|
if (! pto)
|
|
goto fail;
|
|
|
|
bool constp = (cvto & __attr_type_info::CONST);
|
|
for (subto = &pto->type, subfr = &pfr->type; ;
|
|
subto = &pto->type, subfr = &pfr->type)
|
|
{
|
|
if (const __attr_type_info *at
|
|
= dynamic_cast <const __attr_type_info *> (subfr))
|
|
{
|
|
cvfrom = at->attr;
|
|
subfr = &at->type;
|
|
}
|
|
else
|
|
cvfrom = __attr_type_info::NONE;
|
|
|
|
if (const __attr_type_info *at
|
|
= dynamic_cast <const __attr_type_info *> (subto))
|
|
{
|
|
cvto = at->attr;
|
|
subto = &at->type;
|
|
}
|
|
else
|
|
cvto = __attr_type_info::NONE;
|
|
|
|
if (((cvfrom & __attr_type_info::CONST)
|
|
> (cvto & __attr_type_info::CONST))
|
|
|| ((cvfrom & __attr_type_info::VOLATILE)
|
|
> (cvto & __attr_type_info::VOLATILE)))
|
|
goto fail;
|
|
|
|
if (! constp
|
|
&& (((cvfrom & __attr_type_info::CONST)
|
|
< (cvto & __attr_type_info::CONST))
|
|
|| ((cvfrom & __attr_type_info::VOLATILE)
|
|
< (cvto & __attr_type_info::VOLATILE))))
|
|
goto fail;
|
|
|
|
if (*subto == *subfr)
|
|
{
|
|
new_objptr = objptr;
|
|
break;
|
|
}
|
|
|
|
pto = dynamic_cast <const __pointer_type_info *> (subto);
|
|
pfr = dynamic_cast <const __pointer_type_info *> (subfr);
|
|
if (! pto || ! pfr)
|
|
goto fail;
|
|
|
|
if (! (cvto & __attr_type_info::CONST))
|
|
constp = false;
|
|
}
|
|
}
|
|
}
|
|
fail:
|
|
|
|
#if 0
|
|
if (new_objptr)
|
|
printf ("It converts, delta is %d\n", new_objptr-objptr);
|
|
#endif
|
|
return new_objptr;
|
|
}
|
|
|
|
/* Called from __cp_pop_exception. Is P the type_info node for a pointer
|
|
of some kind? */
|
|
|
|
bool
|
|
__is_pointer (void *p)
|
|
{
|
|
const type_info *t = reinterpret_cast <const type_info *>(p);
|
|
const __pointer_type_info *pt =
|
|
dynamic_cast <const __pointer_type_info *> (t);
|
|
return pt != 0;
|
|
}
|
|
|
|
extern "C" void
|
|
__rtti_ptr (void *addr, const char *n, const type_info *ti)
|
|
{ new (addr) __pointer_type_info (n, *ti); }
|
|
|
|
extern "C" void
|
|
__rtti_attr (void *addr, const char *n, int attrval, const type_info *ti)
|
|
{
|
|
new (addr) __attr_type_info
|
|
(n, static_cast <__attr_type_info::cv> (attrval), *ti);
|
|
}
|
|
|
|
extern "C" void
|
|
__rtti_func (void *addr, const char *name)
|
|
{ new (addr) __func_type_info (name); }
|
|
|
|
extern "C" void
|
|
__rtti_ptmf (void *addr, const char *name)
|
|
{ new (addr) __ptmf_type_info (name); }
|
|
|
|
extern "C" void
|
|
__rtti_ptmd (void *addr, const char *name)
|
|
{ new (addr) __ptmd_type_info (name); }
|
|
|
|
extern "C" void
|
|
__rtti_array (void *addr, const char *name)
|
|
{ new (addr) __array_type_info (name); }
|
|
|
|
extern "C" void *
|
|
__dynamic_cast (const type_info& (*from)(void), const type_info& (*to)(void),
|
|
int require_public, void *address,
|
|
const type_info & (*sub)(void), void *subptr)
|
|
{
|
|
return static_cast <const __user_type_info &> (from ()).dcast
|
|
(to (), require_public, address, &(sub ()), subptr);
|
|
}
|
|
|
|
// type_info nodes and functions for the builtin types. The mangling here
|
|
// must match the mangling in gcc/cp/rtti.c.
|
|
|
|
#define BUILTIN(mangled) \
|
|
unsigned char __ti##mangled [sizeof (__builtin_type_info)] \
|
|
__attribute__ ((aligned (__alignof__ (void *)))); \
|
|
extern "C" const type_info &__tf##mangled (void) { \
|
|
if ((*(void **) __ti##mangled) == 0) \
|
|
new (__ti##mangled) __builtin_type_info (#mangled); \
|
|
return *(type_info *)__ti##mangled; \
|
|
}
|
|
|
|
BUILTIN (v); BUILTIN (x); BUILTIN (l); BUILTIN (i); BUILTIN (s); BUILTIN (b);
|
|
BUILTIN (c); BUILTIN (w); BUILTIN (r); BUILTIN (d); BUILTIN (f);
|
|
BUILTIN (Ui); BUILTIN (Ul); BUILTIN (Ux); BUILTIN (Us); BUILTIN (Uc);
|