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[glibc.git] / bits / mathdef.h
blob15140997c05b73573abe597f9c2254c1dd5dbe97
1 /* Copyright (C) 1997 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 Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 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 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
19 #ifndef _MATH_H
20 # error "Never use <bits/mathdef.h> directly; include <math.h> instead"
21 #endif
24 /* Normally, there is no long double type and the `float' and `double'
25 expressions are evaluated as `double'. */
26 typedef double float_t; /* `float' expressions are evaluated as
27 `double'. */
28 typedef double double_t; /* `double' expressions are evaluated as
29 `double'. */
31 /* Signal that both types are `double'. */
32 #define FLT_EVAL_METHOD 1
34 /* Define `INFINITY' as value of type `float'. */
35 #define INFINITY HUGE_VALF
38 /* The values returned by `ilogb' for 0 and NaN respectively. */
39 #define FP_ILOGB0 0x80000001
40 #define FP_ILOGBNAN 0x7fffffff
42 /* Number of decimal digits for the `double' type. */
43 #define DECIMAL_DIG 15