62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
|
/* Implementation of the EXTENDS_TYPE_OF intrinsic.
|
||
|
|
Copyright (C) 2004, 2007, 2009 Free Software Foundation, Inc.
|
||
|
|
Contributed by Janus Weil <janus@gcc.gnu.org>.
|
||
|
|
|
||
|
|
This file is part of the GNU Fortran 95 runtime library (libgfortran).
|
||
|
|
|
||
|
|
Libgfortran 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 3 of the License, or (at your option) any later version.
|
||
|
|
|
||
|
|
Libgfortran 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.
|
||
|
|
|
||
|
|
Under Section 7 of GPL version 3, you are granted additional
|
||
|
|
permissions described in the GCC Runtime Library Exception, version
|
||
|
|
3.1, as published by the Free Software Foundation.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU General Public License and
|
||
|
|
a copy of the GCC Runtime Library Exception along with this program;
|
||
|
|
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
||
|
|
<http://www.gnu.org/licenses/>. */
|
||
|
|
|
||
|
|
|
||
|
|
#include "libgfortran.h"
|
||
|
|
|
||
|
|
#ifdef HAVE_STDLIB_H
|
||
|
|
#include <stdlib.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
typedef struct vtype
|
||
|
|
{
|
||
|
|
GFC_INTEGER_4 hash;
|
||
|
|
GFC_INTEGER_4 size;
|
||
|
|
struct vtype *extends;
|
||
|
|
}
|
||
|
|
vtype;
|
||
|
|
|
||
|
|
|
||
|
|
extern GFC_LOGICAL_4 is_extension_of (struct vtype *, struct vtype *);
|
||
|
|
export_proto(is_extension_of);
|
||
|
|
|
||
|
|
|
||
|
|
/* This is a helper function for the F2003 intrinsic EXTENDS_TYPE_OF.
|
||
|
|
While EXTENDS_TYPE_OF accepts CLASS or TYPE arguments, this one here gets
|
||
|
|
passed the corresponding vtabs. Each call to EXTENDS_TYPE_OF is translated
|
||
|
|
to a call to is_extension_of. */
|
||
|
|
|
||
|
|
GFC_LOGICAL_4
|
||
|
|
is_extension_of (struct vtype *v1, struct vtype *v2)
|
||
|
|
{
|
||
|
|
while (v1)
|
||
|
|
{
|
||
|
|
if (v1->hash == v2->hash) return 1;
|
||
|
|
v1 = v1->extends;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|