mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-26 04:31:03 +00:00
b33ed4326d
2004-04-21 Jakub Jelinek <jakub@redhat.com> * posix/tst-chmod.c (do_test): Fix a typo. * elf/lateglobal.c (main): Fix error checks. Patch by Stephen Clarke <stephen.clarke@st.com>. * manual/ctype.texi (isblank, iswblank): Mark as ISO functions, mention they have been added in ISO C99. Reported by Ben Pfaff <blp@cs.stanford.edu>. 2004-03-31 H.J. Lu <hongjiu.lu@intel.com> * sysdeps/ieee754/ldbl-128/bits/huge_vall.h: Fix typo.
52 lines
1.8 KiB
C
52 lines
1.8 KiB
C
/* `HUGE_VALL' constant for IEEE 754 machines (where it is infinity).
|
|
Used by <stdlib.h> and <math.h> functions for overflow.
|
|
Copyright (C) 1992, 1995, 1996, 1997, 1999, 2000, 2004
|
|
Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#ifndef _MATH_H
|
|
# error "Never use <bits/huge_vall.h> directly; include <math.h> instead."
|
|
#endif
|
|
|
|
/* IEEE positive infinity (-HUGE_VAL is negative infinity). */
|
|
|
|
#if __GNUC_PREREQ(3,3)
|
|
# define HUGE_VALL (__builtin_huge_vall())
|
|
#elif __GNUC_PREREQ(2,96)
|
|
# define HUGE_VALL (__extension__ 0x1.0p32767L)
|
|
#else
|
|
# include <endian.h>
|
|
|
|
typedef union { unsigned char __c[16]; long double __ld; } __huge_vall_t;
|
|
|
|
# if __BYTE_ORDER == __BIG_ENDIAN
|
|
# define __HUGE_VALL_bytes { 0x7f, 0xff, 0,0,0,0,0,0,0,0,0,0,0,0,0,0 }
|
|
# endif
|
|
# if __BYTE_ORDER == __LITTLE_ENDIAN
|
|
# define __HUGE_VALL_bytes { 0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0xff, 0x7f }
|
|
# endif
|
|
|
|
# ifdef __GNUC__
|
|
# define HUGE_VALL (__extension__ \
|
|
((__huge_vall_t) { __c : __HUGE_VALL_bytes }).__ld)
|
|
# else
|
|
static __huge_vall_t __huge_vall = { __HUGE_VALL_bytes };
|
|
# define HUGE_VALL (__huge_vall.__ld)
|
|
# endif
|
|
#endif
|