usr/src/cmd/sendmail/include/sm/limits.h

   1 /*
   2  * Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers.
   3  *      All rights reserved.
   4  *
   5  * By using this file, you agree to the terms and conditions set
   6  * forth in the LICENSE file which can be found at the top level of
   7  * the sendmail distribution.
   8  *
   9  *      $Id: limits.h,v 1.6 2001/03/08 03:23:08 ca Exp $
  10  */
  11
  12 #pragma ident   "%Z%%M% %I%     %E% SMI"
  13
  14 /*
  15 **  <sm/limits.h>
  16 **  This header file is a portability wrapper for <limits.h>.
  17 **  It includes <limits.h>, then it ensures that the following macros
  18 **  from the C 1999 standard for <limits.h> are defined:
  19 **      LLONG_MIN, LLONG_MAX
  20 **      ULLONG_MAX
  21 */
  22
  23 #ifndef SM_LIMITS_H
  24 # define SM_LIMITS_H
  25
  26 # include <limits.h>
  27 # include <sm/types.h>
  28 # include <sys/param.h>
  29
  30 /*
  31 **  The following assumes two's complement binary arithmetic.
  32 */
  33
  34 # ifndef LLONG_MIN
  35 #  define LLONG_MIN     ((LONGLONG_T)(~(ULLONG_MAX >> 1)))
  36 # endif /* ! LLONG_MIN */
  37 # ifndef LLONG_MAX
  38 #  define LLONG_MAX     ((LONGLONG_T)(ULLONG_MAX >> 1))
  39 # endif /* ! LLONG_MAX */
  40 # ifndef ULLONG_MAX
  41 #  define ULLONG_MAX    ((ULONGLONG_T)(-1))
  42 # endif /* ! ULLONG_MAX */
  43
  44 /*
  45 **  PATH_MAX is defined by the POSIX standard.  All modern systems
  46 **  provide it.  Older systems define MAXPATHLEN in <sys/param.h> instead.
  47 */
  48
  49 # ifndef PATH_MAX
  50 #  ifdef MAXPATHLEN
  51 #   define PATH_MAX     MAXPATHLEN
  52 #  else /* MAXPATHLEN */
  53 #   define PATH_MAX     2048
  54 #  endif /* MAXPATHLEN */
  55 # endif /* ! PATH_MAX */
  56
  57 #endif /* ! SM_LIMITS_H */