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- // RTTI support for -*- C++ -*-
- // Copyright (C) 1994, 1995 Free Software Foundation
-
- // This file is part of the GNU ANSI C++ Library. This library 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.
-
- // 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 General Public License for more details.
-
- // You should have received a copy of the GNU General Public License
- // along with this library; 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 files
- // compiled with a GNU compiler to produce an executable, this does not 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.
-
- // Written by Kung Hsu based upon the specification in the 20 September 1994
- // C++ working paper, ANSI document X3J16/94-0158.
-
- #ifndef __TYPEINFO__
- #define __TYPEINFO__
-
- #ifdef __GNUG__
- #pragma interface "std/typeinfo.h"
- #endif
-
- extern "C" void* __throw_type_match_rtti (void *, void *, void *);
-
- extern "C++" {
- class type_info {
- private:
- // assigning type_info is not supported. made private.
- type_info& operator=(const type_info&);
- type_info(const type_info&);
-
- public:
- enum node_type {
- _RTTI_BUILTIN_TYPE, // builtin type
- _RTTI_USER_TYPE, // user defined type
- _RTTI_CLASS_TYPE, // class type
- _RTTI_POINTER_TYPE, // pointer type
- _RTTI_ATTR_TYPE, // attribute type for const and volatile
- _RTTI_FUNC_TYPE, // function type
- _RTTI_PTMF_TYPE, // pointer to member function type
- _RTTI_PTMD_TYPE // pointer to member data type
- };
-
- // return node type of the object
- virtual node_type __rtti_get_node_type() const { return _RTTI_BUILTIN_TYPE; }
-
- // get_name will return the name of the type, NULL if no name (like builtin)
- virtual const char * __rtti_get_name() const { return 0; }
-
- // compare if type represented by the type_info are the same type
- virtual int __rtti_compare(const type_info&) const { return 0; }
-
- // argument passed is the desired type,
- // for class type, if the type can be converted to the desired type,
- // it will be, and returned, else 0 is returned. If the match
- // succeeds, the return value will be adjusted to point to the sub-object.
- virtual void* __rtti_match(const type_info&, int, void *) const {
- // This should never be called.
- return 0;
- };
-
- // destructor
- virtual ~type_info() {}
- type_info() {}
-
- bool before(const type_info& arg);
- const char* name() const
- { return __rtti_get_name(); }
- bool operator==(const type_info& arg) const
- { return __rtti_compare(arg) == 0; }
- bool operator!=(const type_info& arg) const
- { return __rtti_compare(arg) != 0; }
- };
-
- // type_info for builtin type
-
- class __builtin_type_info : public type_info {
- public:
- enum builtin_type_val {
- _RTTI_BI_BOOL = 1, _RTTI_BI_CHAR, _RTTI_BI_SHORT, _RTTI_BI_INT,
- _RTTI_BI_LONG, _RTTI_BI_LONGLONG, _RTTI_BI_FLOAT,
- _RTTI_BI_DOUBLE, _RTTI_BI_LDOUBLE, _RTTI_BI_UCHAR,
- _RTTI_BI_USHORT, _RTTI_BI_UINT, _RTTI_BI_ULONG,
- _RTTI_BI_ULONGLONG, _RTTI_BI_SCHAR, _RTTI_BI_WCHAR, _RTTI_BI_VOID
- };
-
- builtin_type_val b_type;
-
- __builtin_type_info (builtin_type_val bt) : b_type (bt) {}
- node_type __rtti_get_node_type () const
- { return _RTTI_BUILTIN_TYPE; }
- const char *__rtti_get_name () const
- { return (const char *)0; }
- int __rtti_compare (const type_info& arg) const
- { return (arg.__rtti_get_node_type () == _RTTI_BUILTIN_TYPE &&
- ((__builtin_type_info&)arg).b_type == b_type) ? 0 : -1; }
- };
-
- // serice function for comparing types by name.
-
- 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;
- };
-
- // type_info for user type.
-
- class __user_type_info : public type_info {
- private:
- const char *_name;
-
- public:
- __user_type_info (const char *nm) : _name (nm) {}
- node_type __rtti_get_node_type () const
- { return _RTTI_USER_TYPE; }
- const char *__rtti_get_name () const
- { return _name; }
- int __rtti_compare (const type_info& arg) const
- { return (arg.__rtti_get_node_type () == __rtti_get_node_type() &&
- __fast_compare (_name, arg.__rtti_get_name ()) == 0) ? 0 : -1; }
- };
-
- // type_info for a class.
-
- class __class_type_info : public __user_type_info {
- private:
- enum access_mode {
- _RTTI_ACCESS_PUBLIC, _RTTI_ACCESS_PROTECTED, _RTTI_ACCESS_PRIVATE
- };
- type_info **base_list;
- int *offset_list;
- int *is_virtual_list;
- access_mode *access_list;
- int n_bases;
-
- public:
- __class_type_info (const char *name, type_info **bl, int *off,
- int *is_vir, access_mode *acc, int bn)
- : __user_type_info (name), base_list (bl), offset_list(off),
- is_virtual_list(is_vir), access_list(acc), n_bases (bn) {}
- node_type __rtti_get_node_type () const
- { return _RTTI_CLASS_TYPE; }
-
- // inherit __rtti_compare from __user_type_info
-
- // This is a little complex defined in typeinfo.cc
- void* __rtti_match(const type_info&, int, void *) const;
- };
-
- // type info for pointer type.
-
- class __pointer_type_info : public type_info {
- private:
- type_info& type;
-
- public:
- __pointer_type_info (type_info& ti) : type (ti) {}
- node_type __rtti_get_node_type () const
- { return _RTTI_POINTER_TYPE; }
- const char *__rtti_get_name () const
- { return (const char *)0; }
- int __rtti_compare (const type_info& arg) const
- { return (arg.__rtti_get_node_type () == __rtti_get_node_type() &&
- type.__rtti_compare ( ((__pointer_type_info&)arg).type) == 0) ? 0 : -1; }
- void* __rtti_match(const type_info& catch_type, int, void *objptr) const;
- };
-
- // type info for attributes
-
- class __attr_type_info : public type_info {
- public:
- enum attr_val {
- _RTTI_ATTR_CONST = 1, _RTTI_ATTR_VOLATILE, _RTTI_ATTR_CONSTVOL
- };
-
- attr_val attr;
- type_info& type;
-
- __attr_type_info (attr_val a, type_info& t) : attr (a), type(t) {}
- node_type __rtti_get_node_type () const
- { return _RTTI_ATTR_TYPE; }
- const char *__rtti_get_name () const
- { return (const char *)0; }
- int __rtti_compare (const type_info& arg) const
- { return (arg.__rtti_get_node_type () == _RTTI_ATTR_TYPE &&
- attr == ((__attr_type_info&)arg).attr &&
- type.__rtti_compare ( ((__attr_type_info&)arg).type ) == 0)
- ? 0 : -1; }
- };
-
- // type info for function.
-
- class __func_type_info : public __user_type_info {
- public:
- __func_type_info (const char *name) : __user_type_info (name) {}
- node_type __rtti_get_node_type () const
- { return _RTTI_FUNC_TYPE; }
- };
-
- // type info for pointer to member function.
-
- class __ptmf_type_info : public __user_type_info {
- public:
- __ptmf_type_info (const char *name) : __user_type_info (name) {}
- node_type __rtti_get_node_type () const
- { return _RTTI_PTMF_TYPE; }
- };
-
- // type info for pointer to data member.
-
- class __ptmd_type_info : public type_info {
- type_info& classtype;
- type_info& type;
- public:
- __ptmd_type_info (type_info& tc, type_info& t) : classtype (tc), type (t) {}
- node_type __rtti_get_node_type () const
- { return _RTTI_PTMD_TYPE; }
- int __rtti_compare (const type_info& arg) const
- { return (arg.__rtti_get_node_type () == _RTTI_PTMD_TYPE &&
- classtype.__rtti_compare ( ((__ptmd_type_info&)arg).classtype ) == 0 &&
- type.__rtti_compare ( ((__ptmd_type_info&)arg).type ) == 0)
- ? 0 : -1; }
- };
- } // extern "C++"
-
- #include <stdexcept>
-
- #endif
-