Update.
[glibc.git] / bits / fenv.h
blob7552677d84de5b02553ecdb52bfff66f25770c90
1 /* Copyright (C) 1997, 1998 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 _FENV_H
20 # error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
21 #endif
24 /* Here should be the exception be defined:
25 FE_INVALID
26 FE_DIVBYZERO
27 FE_OVERFLOW
28 FE_UNDERFLOW
29 FE_INEXACT
30 We define no macro which signals no exception is supported. */
32 #define FE_ALL_EXCEPT 0
35 /* Here should the rounding modes be defined:
36 FE_TONEAREST
37 FE_DOWNWARD
38 FE_UPWARD
39 FE_TOWARDZERO
40 We define no macro which signals no rounding mode is selectable. */
43 /* Type representing exception flags.
44 XXX Probably we should also include the signal handler here. */
45 typedef struct
47 unsigned int flags;
49 fexcept_t;
52 /* Type representing floating-point environment. */
53 typedef struct
55 fexcept_t excepts;
56 /* XXX I don't know what else we should save. */
58 fenv_t;
60 /* If the default argument is used we use this value. */
61 #define FE_DFL_ENV ((fenv_t *) -1l)