bits/mathdef.h

   1 /* Copyright (C) 1997, 1998 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 #if !defined _MATH_H && !defined _COMPLEX_H
  20 # error "Never use <bits/mathdef.h> directly; include <math.h> instead"
  21 #endif
  22
  23 #if defined  __USE_ISOC9X && defined _MATH_H
  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
  44
  45 #endif  /* ISO C 9X */
  46
  47 #ifndef __NO_LONG_DOUBLE_MATH
  48 /* Signal that we do not really have a `long double'.  The disables the
  49    declaration of all the `long double' function variants.  */
  50 # define __NO_LONG_DOUBLE_MATH  1
  51 #endif