Back to index

glibc  2.9
mathdef.h
Go to the documentation of this file.
00001 /* Copyright (C) 2006 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #if !defined _MATH_H && !defined _COMPLEX_H
00020 # error "Never use <bits/mathdef.h> directly; include <math.h> instead"
00021 #endif
00022 
00023 #if defined  __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF
00024 # define _MATH_H_MATHDEF    1
00025 
00026 /* GCC does not promote `float' values to `double'.  */
00027 typedef float float_t;             /* `float' expressions are evaluated as
00028                                `float'.  */
00029 typedef double double_t;    /* `double' expressions are evaluated as
00030                                `double'.  */
00031 
00032 /* The values returned by `ilogb' for 0 and NaN respectively.  */
00033 # define FP_ILOGB0   (-2147483647)
00034 # define FP_ILOGBNAN (2147483647)
00035 
00036 #endif /* ISO C99 */
00037 
00038 /* On hppa `long double' is 64-bits. */
00039 #undef __NO_LONG_DOUBLE_MATH
00040