/* Portions Copyright (C) 2001 artofcode LLC.
   Portions Copyright (C) 1996, 2001 Artifex Software Inc.
   Portions Copyright (C) 1988, 2000 Aladdin Enterprises.
   This software is based in part on the work of the Independent JPEG Group.
   All Rights Reserved.

   This software is distributed under license and may not be copied, modified
   or distributed except as expressly authorized under the terms of that
   license.  Refer to licensing information at http://www.artifex.com/ or
   contact Artifex Software, Inc., 101 Lucas Valley Road #110,
   San Rafael, CA  94903, (415)492-9861, for further information. */

/*$RCSfile: gp_sysv.c,v $ $Revision: 1.7 $ */
/* System V Unix-specific routines for Ghostscript */

/* This file contains a couple of standard Unix library procedures */
/* that a few System V platforms don't provide. */
/* Note that this file is NOT used for SVR4 platforms. */
#include <errno.h>
#include "stdio_.h"
#include "time_.h"
#include <sys/types.h>
#include <sys/times.h>
#include <sys/stat.h>
#include <sys/param.h>

/* rename */
int
rename(const char *a, const char *b)
{
    if (access(a, 0) == -1)
	return (-1);
    unlink(b);
    if (link(a, b) == -1)
	return (-1);
    if (unlink(a) == -1) {
	unlink(b);		/* ??? */
	return (-1);
    }
    return (0);
}

/* gettimeofday */
#ifndef HZ
#  define	HZ	100	/* see sys/param.h */
#endif
int
gettimeofday(struct timeval *tvp, struct timezone *tzp)
{
    struct tms tms;
    static long offset = 0;
    long ticks;

    if (!offset) {
	time(&offset);
	offset -= (times(&tms) / HZ);
    }
    ticks = times(&tms);
    tvp->tv_sec = ticks / HZ + offset;
    tvp->tv_usec = (ticks % HZ) * (1000 * 1000 / HZ);
    return 0;
}
