/* Copyright (C) 2001-2023 Artifex Software, Inc.
   All Rights Reserved.

   This software is provided AS-IS with no warranty, either express or
   implied.

   This software is distributed under license and may not be copied,
   modified or distributed except as expressly authorized under the terms
   of the license contained in the file LICENSE in this distribution.

   Refer to licensing information at http://www.artifex.com or contact
   Artifex Software, Inc.,  39 Mesa Street, Suite 108A, San Francisco,
   CA 94129, USA, for further information.
*/


/* Generic substitute for Unix sys/time.h */

#ifndef time__INCLUDED
#  define time__INCLUDED

/* We must include std.h before any file that includes sys/types.h. */
#include "std.h"

/*
 * The location (or existence) of certain system headers is
 * environment-dependent. We detect this in the makefile
 * and conditionally define switches in gconfig_.h.
 */
#include "gconfig_.h"

/*
 * Some System V environments don't include sys/time.h.
 * The HAVE_SYS_TIME_H switch in gconfig_.h reflects this.
 */
#if defined(HAVE_SYS_TIME_H) && HAVE_SYS_TIME_H == 1
#  include <sys/time.h>
#  if defined(Plan9) || defined(M_UNIX) || defined(_IBMR2) || \
      defined(_SEQUENT_) || defined(__GNUC__) || defined(__INTEL_COMPILER) ||\
      defined(__hpux) || defined(__SUNPRO_C)
     /* Plan 9, SCO, AIX and Sequent's DYNIX/ptx need both time.h and
      * sys/time.h! As of version 2.2, at least some glibc
      * installations also require both files.
      * Following Duraid Madina's request we also do it on Intel compiler.
      */
#    include <time.h>
#  endif
#else
#  include <time.h>
#  if !defined(__DECC) && !defined(__MWERKS__)
struct timeval {
    long tv_sec, tv_usec;
};
#  endif
struct timezone {
    int tz_minuteswest, tz_dsttime;
};

#endif

#if defined(ultrix) && defined(mips)
/*
 * Apparently some versions of Ultrix for the DECstation include
 * time_t in sys/time.h, and some don't.  If you get errors
 * compiling gp_unix.c, uncomment the next line.
 */
/*      typedef int     time_t; */
#endif

/*
 * In SVR4.0 (but not other System V implementations),
 * gettimeofday doesn't take a timezone argument.
 */
#ifdef SVR4_0
#  define gettimeofday_no_timezone 1
#else
#  define gettimeofday_no_timezone 0
#endif

/* Some System V environments, and Posix environments, need <sys/times.h>. */
#if defined(HAVE_SYS_TIMES_H) && HAVE_SYS_TIMES_H == 1
#  include <sys/times.h>
#  define use_times_for_usertime 1
                /* Posix 1003.1b-1993 section 4.8.1.5 says that
                   CLK_TCK is obsolescent and that sysconf(_SC_CLK_TCK)
                   should be used instead, but this requires including
                   <unistd.h>, which is too painful to configure.  */
#  ifndef CLK_TCK
#    define CLK_TCK 100		/* guess for older hosts */
#  endif
#else
#  define use_times_for_usertime 0
#endif

#endif /* time__INCLUDED */