/* Primitive operations on floating point for GNU Emacs Lisp interpreter.
Copyright (C) 1988, 1993, 1994, 1999, 2001, 2002, 2003, 2004,
- 2005, 2006, 2007 Free Software Foundation, Inc.
+ 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
This file is part of GNU Emacs.
-GNU Emacs is free software; you can redistribute it and/or modify
+GNU Emacs 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, or (at your option)
-any later version.
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with GNU Emacs; see the file COPYING. If not, write to
-the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-Boston, MA 02110-1301, USA. */
+along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
/* ANSI C requires only these float functions:
#endif
#endif
-/* Work around a problem that happens because math.h on hpux 7
- defines two static variables--which, in Emacs, are not really static,
- because `static' is defined as nothing. The problem is that they are
- defined both here and in lread.c.
- These macros prevent the name conflict. */
-#if defined (HPUX) && !defined (HPUX8)
-#define _MAXLDBL floatfns_maxldbl
-#define _NMAXLDBL floatfns_nmaxldbl
-#endif
-
#include <math.h>
/* This declaration is omitted on some systems, like Ultrix. */
(arg1, arg2)
register Lisp_Object arg1, arg2;
{
- double f1, f2;
+ double f1, f2, f3;
CHECK_NUMBER_OR_FLOAT (arg1);
CHECK_NUMBER_OR_FLOAT (arg2);
else if ((f1 == 0.0 && f2 < 0.0) || (f1 < 0 && f2 != floor(f2)))
domain_error2 ("expt", arg1, arg2);
#endif
- IN_FLOAT2 (f1 = pow (f1, f2), "expt", arg1, arg2);
- return make_float (f1);
+ IN_FLOAT2 (f3 = pow (f1, f2), "expt", arg1, arg2);
+ /* Check for overflow in the result. */
+ if (f1 != 0.0 && f3 == 0.0)
+ range_error ("expt", arg1);
+ return make_float (f3);
}
DEFUN ("log", Flog, Slog, 1, 2, 0,
fatal_error_signal (signo);
#ifdef BSD_SYSTEM
-#ifdef BSD4_1
- sigrelse (SIGILL);
-#else /* not BSD4_1 */
sigsetmask (SIGEMPTYMASK);
-#endif /* not BSD4_1 */
#else
/* Must reestablish handler each time it is called. */
signal (SIGILL, float_error);