usr/src/lib/libast/common/string/fmtelapsed.c

   1 /***********************************************************************
   2 *                                                                      *
   3 *               This software is part of the ast package               *
   4 *          Copyright (c) 1985-2010 AT&T Intellectual Property          *
   5 *                      and is licensed under the                       *
   6 *                  Common Public License, Version 1.0                  *
   7 *                    by AT&T Intellectual Property                     *
   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 elapsed time for u 1/n secs
  25  * compatible with strelapsed()
  26  * return value length is at most 7
  27  */
  28
  29 #include <ast.h>
  30
  31 char*
  32 fmtelapsed(register unsigned long u, register int n)
  33 {
  34         register unsigned long  t;
  35         char*                   buf;
  36         int                     z;
  37
  38         if (u == 0L)
  39                 return "0";
  40         if (u == ~0L)
  41                 return "%";
  42         buf = fmtbuf(z = 8);
  43         t = u / n;
  44         if (t < 60)
  45                 sfsprintf(buf, z, "%lu.%02lus", t, (u * 100 / n) % 100);
  46         else if (t < 60*60)
  47                 sfsprintf(buf, z, "%lum%02lus", t / 60, t - (t / 60) * 60);
  48         else if (t < 24*60*60)
  49                 sfsprintf(buf, z, "%luh%02lum", t / (60*60), (t - (t / (60*60)) * (60*60)) / 60);
  50         else if (t < 7*24*60*60)
  51                 sfsprintf(buf, z, "%lud%02luh", t / (24*60*60), (t - (t / (24*60*60)) * (24*60*60)) / (60*60));
  52         else if (t < 31*24*60*60)
  53                 sfsprintf(buf, z, "%luw%02lud", t / (7*24*60*60), (t - (t / (7*24*60*60)) * (7*24*60*60)) / (24*60*60));
  54         else if (t < 365*24*60*60)
  55                 sfsprintf(buf, z, "%luM%02lud", (t * 12) / (365*24*60*60), ((t * 12) - ((t * 12) / (365*24*60*60)) * (365*24*60*60)) / (12*24*60*60));
  56         else if (t < (365UL*4UL+1UL)*24UL*60UL*60UL)
  57                 sfsprintf(buf, z, "%luY%02luM", t / (365*24*60*60), ((t - (t / (365*24*60*60)) * (365*24*60*60)) * 5) / (152 * 24 * 60 * 60));
  58         else
  59                 sfsprintf(buf, z, "%luY%02luM", (t * 4) / ((365UL*4UL+1UL)*24UL*60UL*60UL), (((t * 4) - ((t * 4) / ((365UL*4UL+1UL)*24UL*60UL*60UL)) * ((365UL*4UL+1UL)*24UL*60UL*60UL)) * 5) / ((4 * 152 + 1) * 24 * 60 * 60));
  60         return buf;
  61 }