lib/libc/stdio/xprintf_time.c

   1 /*-
   2  * Copyright (c) 2005 Poul-Henning Kamp
   3  * Copyright (c) 1990, 1993
   4  *      The Regents of the University of California.  All rights reserved.
   5  *
   6  * This code is derived from software contributed to Berkeley by
   7  * Chris Torek.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * $FreeBSD: src/lib/libc/stdio/xprintf_time.c,v 1.3 2006/02/04 14:35:01 phk Exp $
  34  */
  35
  36 #include "namespace.h"
  37 #include <stdio.h>
  38 #include <wchar.h>
  39 #include <stdint.h>
  40 #include <assert.h>
  41 #include <sys/time.h>
  42 #include "un-namespace.h"
  43 #include "printf.h"
  44
  45 int
  46 __printf_arginfo_time(const struct printf_info *pi __unused, size_t n,
  47                       int *argt)
  48 {
  49
  50         assert(n >= 1);
  51         argt[0] = PA_POINTER;
  52         return (1);
  53 }
  54 #define MINUTE 60
  55 #define HOUR    (60 * MINUTE)
  56 #define DAY     (24 * HOUR)
  57 #define YEAR    (365 * DAY)
  58
  59 int
  60 __printf_render_time(struct __printf_io *io, const struct printf_info *pi,
  61                      const void *const *arg)
  62 {
  63         char buf[100];
  64         char *p;
  65         struct timeval *tv;
  66         struct timespec *ts;
  67         time_t *tp;
  68         intmax_t t, tx;
  69         int i, prec, nsec;
  70
  71         prec = 0;
  72         if (pi->is_long) {
  73                 tv = *((struct timeval **)arg[0]);
  74                 t = tv->tv_sec;
  75                 nsec = tv->tv_usec * 1000;
  76                 prec = 6;
  77         } else if (pi->is_long_double) {
  78                 ts = *((struct timespec **)arg[0]);
  79                 t = ts->tv_sec;
  80                 nsec = ts->tv_nsec;
  81                 prec = 9;
  82         } else {
  83                 tp = *((time_t **)arg[0]);
  84                 t = *tp;
  85         }
  86
  87         p = buf;
  88         if (pi->alt) {
  89                 tx = t;
  90                 if (t >= YEAR) {
  91                         p += sprintf(p, "%jdy", t / YEAR);
  92                         t %= YEAR;
  93                 }
  94                 if (t >= DAY && t != 0) {
  95                         p += sprintf(p, "%jdd", t / DAY);
  96                         t %= DAY;
  97                 }
  98                 if (t >= HOUR && t != 0) {
  99                         p += sprintf(p, "%jdh", t / HOUR);
 100                         t %= HOUR;
 101                 }
 102                 if (t >= MINUTE && t != 0) {
 103                         p += sprintf(p, "%jdm", t / MINUTE);
 104                         t %= MINUTE;
 105                 }
 106                 if (t != 0 || tx == 0)
 107                         p += sprintf(p, "%jds", t);
 108         } else  {
 109                 p += sprintf(p, "%jd", (intmax_t)t);
 110         }
 111         if (pi->is_long || pi->is_long_double) {
 112                 if (pi->prec >= 0)
 113                         prec = pi->prec;
 114                 for (i = prec; i < 9; i++)
 115                         nsec /= 10;
 116                 p += sprintf(p, ".%.*d", prec, nsec);
 117         }
 118         return(__printf_out(io, pi, buf, p - buf));
 119 }