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[glibc.git] / bits / mathdef.h
blobd08dc3820db3028ca857aff8b4789dbab123312a
1 /* Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #if !defined _MATH_H && !defined _COMPLEX_H
20 # error "Never use <bits/mathdef.h> directly; include <math.h> instead"
21 #endif
23 #if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF
24 # define _MATH_H_MATHDEF 1
26 /* Normally, there is no long double type and the `float' and `double'
27 expressions are evaluated as `double'. */
28 typedef double float_t; /* `float' expressions are evaluated as
29 `double'. */
30 typedef double double_t; /* `double' expressions are evaluated as
31 `double'. */
33 /* Define `INFINITY' as value of type `float'. */
34 # define INFINITY HUGE_VALF
37 /* The values returned by `ilogb' for 0 and NaN respectively. */
38 # define FP_ILOGB0 (-2147483647)
39 # define FP_ILOGBNAN 2147483647
41 #endif /* ISO C99 */
43 #ifndef __NO_LONG_DOUBLE_MATH
44 /* Signal that we do not really have a `long double'. The disables the
45 declaration of all the `long double' function variants. */
46 # define __NO_LONG_DOUBLE_MATH 1
47 #endif