1  /* MIN, MAX macros.
       2     Copyright (C) 1995, 1998, 2001, 2003, 2005, 2009-2023 Free Software
       3     Foundation, Inc.
       4  
       5     This file is free software: you can redistribute it and/or modify
       6     it under the terms of the GNU Lesser General Public License as
       7     published by the Free Software Foundation; either version 2.1 of the
       8     License, or (at your option) any later version.
       9  
      10     This file is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      13     GNU Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public License
      16     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      17  
      18  #ifndef _MINMAX_H
      19  #define _MINMAX_H
      20  
      21  /* Note: MIN, MAX are also defined in <sys/param.h> on some systems
      22     (glibc, IRIX, HP-UX, OSF/1).  Therefore you might get warnings about
      23     MIN, MAX macro redefinitions on some systems; the workaround is to
      24     #include this file as the last one among the #include list.  */
      25  
      26  /* This file uses HAVE_MINMAX_IN_LIMITS_H, HAVE_MINMAX_IN_SYS_PARAM_H.  */
      27  #if !_GL_CONFIG_H_INCLUDED
      28   #error "Please include config.h first."
      29  #endif
      30  
      31  /* Before we define the following symbols we get the <limits.h> file
      32     since otherwise we get redefinitions on some systems if <limits.h> is
      33     included after this file.  Likewise for <sys/param.h>.
      34     If more than one of these system headers define MIN and MAX, pick just
      35     one of the headers (because the definitions most likely are the same).  */
      36  #if HAVE_MINMAX_IN_LIMITS_H
      37  # include <limits.h>
      38  #elif HAVE_MINMAX_IN_SYS_PARAM_H
      39  # include <sys/param.h>
      40  #endif
      41  
      42  /* Note: MIN and MAX should be used with two arguments of the
      43     same type.  They might not return the minimum and maximum of their two
      44     arguments, if the arguments have different types or have unusual
      45     floating-point values.  For example, on a typical host with 32-bit 'int',
      46     64-bit 'long long', and 64-bit IEEE 754 'double' types:
      47  
      48       MAX (-1, 2147483648) returns 4294967295.
      49       MAX (9007199254740992.0, 9007199254740993) returns 9007199254740992.0.
      50       MAX (NaN, 0.0) returns 0.0.
      51       MAX (+0.0, -0.0) returns -0.0.
      52  
      53     and in each case the answer is in some sense bogus.  */
      54  
      55  /* MAX(a,b) returns the maximum of A and B.  */
      56  #ifndef MAX
      57  # define MAX(a,b) ((a) > (b) ? (a) : (b))
      58  #endif
      59  
      60  /* MIN(a,b) returns the minimum of A and B.  */
      61  #ifndef MIN
      62  # define MIN(a,b) ((a) < (b) ? (a) : (b))
      63  #endif
      64  
      65  #endif /* _MINMAX_H */