kc3-lang/gnulib/lib/log.c

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• Hash : 281b825e
  Author :
  Date : 2018-01-01T00:57:25
  

  maint: Run 'make update-copyright'
  

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• lib/log.c

• /* Logarithm.
     Copyright (C) 2012-2018 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  /* Specification.  */
  #include <math.h>
  
  double
  log (double x)
  #undef log
  {
    if (x <= 0.0)
      {
        /* Work around the OSF/1 5.1 bug.  */
        if (x == 0.0)
          /* Return -Infinity.  */
          return -1.0 / 0.0;
        /* Work around the NetBSD 5.1, Solaris 11.0 bug.  */
        else /* x < 0.0 */
          /* Return NaN.  */
          return 0.0 / 0.0;
      }
    return log (x);
  }
  

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