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/**********************************************************************
defs.h:
some definitions that are used everywhere and that depend on some
HAVE_* macros.
Copyright (C) 2006 Vincent Fourmond
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Library Public License as published
by the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
**********************************************************************/
#ifdef HAVE_ISNAN
/* we use isnan and isinf, which are much faster than the workaround */
#define is_okay_number(x) (! isnan(x) && ! isinf(x))
#else
#define is_okay_number(x) ((x) - (x) == 0.0)
#define isnan(x) ((x) != (x))
/* yes, as funny as it may look NaN != NaN, and that's the only one */
#endif
/* Fix old versions of ruby.h */
#ifndef RSTRING_PTR
# define RSTRING_PTR(x) (RSTRING(x)->ptr)
# define RSTRING_LEN(x) (RSTRING(x)->len)
#endif
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