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