1  /* Test for positive or negative infinity.
       2     Copyright (C) 2007-2023 Free Software Foundation, Inc.
       3  
       4     This file is free software: you can redistribute it and/or modify
       5     it under the terms of the GNU Lesser General Public License as
       6     published by the Free Software Foundation, either version 3 of the
       7     License, or (at your option) any later version.
       8  
       9     This file 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 Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public License
      15     along with this program.  If not, see <https://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  }