convtime.c

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· C语言 代码 · 共 187 行

#ifndef lint
static	char	*sccsid = "@(#)convtime.c	4.1	(ULTRIX)	7/2/90";
#endif lint

/************************************************************************
 *									*
 *			Copyright (c) 1987 by				*
 *		Digital Equipment Corporation, Maynard, MA		*
 *			All rights reserved.				*
 *									*
 *   This software is furnished under a license and may be used and	*
 *   copied  only  in accordance with the terms of such license and	*
 *   with the  inclusion  of  the  above  copyright  notice.   This	*
 *   software  or  any  other copies thereof may not be provided or	*
 *   otherwise made available to any other person.  No title to and	*
 *   ownership of the software is hereby transferred.			*
 *									*
 *   This software is  derived  from  software  received  from  the	*
 *   University    of   California,   Berkeley,   and   from   Bell	*
 *   Laboratories.  Use, duplication, or disclosure is  subject  to	*
 *   restrictions  under  license  agreements  with  University  of	*
 *   California and with AT&T.						*
 *									*
 *   The information in this software is subject to change  without	*
 *   notice  and should not be construed as a commitment by Digital	*
 *   Equipment Corporation.						*
 *									*
 *   Digital assumes no responsibility for the use  or  reliability	*
 *   of its software on equipment which is not supplied by Digital.	*
 *									*
 ************************************************************************/

# include <ctype.h>
# include "useful.h"

/*
**  CONVTIME -- convert time
**
**	Takes a time as an ascii string with a trailing character
**	giving units:
**	  s -- seconds
**	  m -- minutes
**	  h -- hours
**	  d -- days (default)
**	  w -- weeks
**	For example, "3d12h" is three and a half days.
**
**	Parameters:
**		p -- pointer to ascii time.
**
**	Returns:
**		time in seconds.
**
**	Side Effects:
**		none.
*/

time_t
convtime(p)
	char *p;
{
	register time_t t, r;
	register char c;

	r = 0;
	while (*p != '\0')
	{
		t = 0;
		while (isdigit(c = *p++))
			t = t * 10 + (c - '0');
		if (c == '\0')
			p--;
		switch (c)
		{
		  case 'w':		/* weeks */
			t *= 7;

		  case 'd':		/* days */
		  default:
			t *= 24;

		  case 'h':		/* hours */
			t *= 60;

		  case 'm':		/* minutes */
			t *= 60;

		  case 's':		/* seconds */
			break;
		}
		r += t;
	}

	return (r);
}
/*
**  PINTVL -- produce printable version of a time interval
**
**	Parameters:
**		intvl -- the interval to be converted
**		brief -- if TRUE, print this in an extremely compact form
**			(basically used for logging).
**
**	Returns:
**		A pointer to a string version of intvl suitable for
**			printing or framing.
**
**	Side Effects:
**		none.
**
**	Warning:
**		The string returned is in a static buffer.
*/

# define PLURAL(n)	((n) == 1 ? "" : "s")

char *
pintvl(intvl, brief)
	time_t intvl;
	bool brief;
{
	static char buf[256];
	register char *p;
	int wk, dy, hr, mi, se;

	if (intvl == 0 && !brief)
		return ("zero seconds");

	/* decode the interval into weeks, days, hours, minutes, seconds */
	se = intvl % 60;
	intvl /= 60;
	mi = intvl % 60;
	intvl /= 60;
	hr = intvl % 24;
	intvl /= 24;
	if (brief)
		dy = intvl;
	else
	{
		dy = intvl % 7;
		intvl /= 7;
		wk = intvl;
	}

	/* now turn it into a sexy form */
	p = buf;
	if (brief)
	{
		if (dy > 0)
		{
			(void) sprintf(p, "%d+", dy);
			p += strlen(p);
		}
		(void) sprintf(p, "%02d:%02d:%02d", hr, mi, se);
		return (buf);
	}

	/* use the verbose form */
	if (wk > 0)
	{
		(void) sprintf(p, ", %d week%s", wk, PLURAL(wk));
		p += strlen(p);
	}
	if (dy > 0)
	{
		(void) sprintf(p, ", %d day%s", dy, PLURAL(dy));
		p += strlen(p);
	}
	if (hr > 0)
	{
		(void) sprintf(p, ", %d hour%s", hr, PLURAL(hr));
		p += strlen(p);
	}
	if (mi > 0)
	{
		(void) sprintf(p, ", %d minute%s", mi, PLURAL(mi));
		p += strlen(p);
	}
	if (se > 0)
	{
		(void) sprintf(p, ", %d second%s", se, PLURAL(se));
		p += strlen(p);
	}

	return (buf + 2);
}