1*4887Schin /***********************************************************************
2*4887Schin *                                                                      *
3*4887Schin *               This software is part of the ast package               *
4*4887Schin *           Copyright (c) 1985-2007 AT&T Knowledge Ventures            *
5*4887Schin *                      and is licensed under the                       *
6*4887Schin *                  Common Public License, Version 1.0                  *
7*4887Schin *                      by AT&T Knowledge Ventures                      *
8*4887Schin *                                                                      *
9*4887Schin *                A copy of the License is available at                 *
10*4887Schin *            http://www.opensource.org/licenses/cpl1.0.txt             *
11*4887Schin *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
12*4887Schin *                                                                      *
13*4887Schin *              Information and Software Systems Research               *
14*4887Schin *                            AT&T Research                             *
15*4887Schin *                           Florham Park NJ                            *
16*4887Schin *                                                                      *
17*4887Schin *                 Glenn Fowler <gsf@research.att.com>                  *
18*4887Schin *                  David Korn <dgk@research.att.com>                   *
19*4887Schin *                   Phong Vo <kpv@research.att.com>                    *
20*4887Schin *                                                                      *
21*4887Schin ***********************************************************************/
22*4887Schin #pragma prototyped
23*4887Schin /*
24*4887Schin  * return pointer to formatted clock() tics t
25*4887Schin  * return value length is at most 6
26*4887Schin  */
27*4887Schin 
28*4887Schin #include <ast.h>
29*4887Schin #include <tm.h>
30*4887Schin 
31*4887Schin char*
32*4887Schin fmtclock(register Sfulong_t t)
33*4887Schin {
34*4887Schin 	register int		u;
35*4887Schin 	char*			buf;
36*4887Schin 	int			z;
37*4887Schin 
38*4887Schin 	static unsigned int	clk_tck;
39*4887Schin 
40*4887Schin 	if (!clk_tck && !(clk_tck = (unsigned int)strtoul(astconf("CLK_TCK", NiL, NiL), NiL, 10)))
41*4887Schin 		clk_tck = 60;
42*4887Schin 	if (t == 0)
43*4887Schin 		return "0";
44*4887Schin 	if (t == ((Sfulong_t)~0))
45*4887Schin 		return "%";
46*4887Schin 	t = (t * 1000000) / clk_tck;
47*4887Schin 	if (t < 1000)
48*4887Schin 		u = 'u';
49*4887Schin 	else if ((t /= 1000) < 1000)
50*4887Schin 		u = 'm';
51*4887Schin 	else
52*4887Schin 		return fmtelapsed(t / 10, 100);
53*4887Schin 	buf = fmtbuf(z = 7);
54*4887Schin 	sfsprintf(buf, z, "%I*u%cs", sizeof(t), t, u);
55*4887Schin 	return buf;
56*4887Schin }
57