bits/mathdef.h

   1 /* Copyright (C) 1997 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   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.
   8
   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.
  13
  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.  */
  18
  19 #ifndef _MATH_H
  20 # error "Never use <bits/mathdef.h> directly; include <math.h> instead"
  21 #endif
  22
  23
  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'.  */
  30
  31 /* Signal that both types are `double'.  */
  32 #define FLT_EVAL_METHOD 1
  33
  34 /* Define `INFINITY' as value of type `float'.  */
  35 #define INFINITY        HUGE_VALF
  36
  37
  38 /* The values returned by `ilogb' for 0 and NaN respectively.  */
  39 #define FP_ILOGB0       0x80000001
  40 #define FP_ILOGBNAN     0x7fffffff
  41
  42 /* Number of decimal digits for the `double' type.  */
  43 #define DECIMAL_DIG     15