lib/isinf.c

   1 /* Test for positive or negative infinity.
   2    Copyright (C) 2007-2017 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program 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
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License along
  15    with this program; if not, see <http://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Ben Pfaff <blp@gnu.org>, 2008. */
  18
  19 #include <config.h>
  20
  21 #include <float.h>
  22
  23 int
  24 gl_isinff (float x)
  25 {
  26   return x < -FLT_MAX || x > FLT_MAX;
  27 }
  28
  29 int
  30 gl_isinfd (double x)
  31 {
  32   return x < -DBL_MAX || x > DBL_MAX;
  33 }
  34
  35 int
  36 gl_isinfl (long double x)
  37 {
  38   return x < -LDBL_MAX || x > LDBL_MAX;
  39 }