stdio/FreeBSD/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 1.6 2011/03/06 19:47:46 pjd Exp $
  34  */
  35 #include <namespace.h>
  36 #include <stdio.h>
  37 #include <wchar.h>
  38 #include <stdint.h>
  39 #include <assert.h>
  40 #include <sys/time.h>
  41 #include "printf.h"
  42 #include "xprintf_private.h"
  43
  44 __private_extern__ int
  45 __printf_arginfo_time(const struct printf_info *pi, size_t n, int *argt)
  46 {
  47
  48         assert(n >= 1);
  49         argt[0] = PA_POINTER;
  50         return (1);
  51 }
  52 #define MINUTE 60
  53 #define HOUR    (60 * MINUTE)
  54 #define DAY     (24 * HOUR)
  55 #define YEAR    (365 * DAY)
  56
  57 __private_extern__ int
  58 __printf_render_time(struct __printf_io *io, const struct printf_info *pi, const void *const *arg)
  59 {
  60         char buf[100];
  61         char *p;
  62         struct timeval *tv;
  63         struct timespec *ts;
  64         time_t *tp;
  65         intmax_t t, tx;
  66         int i, prec, nsec, ret;
  67
  68         if (pi->is_long) {
  69                 tv = *((struct timeval **)arg[0]);
  70                 t = tv->tv_sec;
  71                 nsec = tv->tv_usec * 1000;
  72                 prec = 6;
  73         } else if (pi->is_long_double) {
  74                 ts = *((struct timespec **)arg[0]);
  75                 t = ts->tv_sec;
  76                 nsec = ts->tv_nsec;
  77                 prec = 9;
  78         } else {
  79                 tp = *((time_t **)arg[0]);
  80                 t = *tp;
  81                 nsec = 0;
  82                 prec = 0;
  83         }
  84         if (pi->is_long || pi->is_long_double) {
  85                 if (pi->prec >= 0)
  86                         prec = pi->prec;
  87                 if (prec == 0)
  88                         nsec = 0;
  89         }
  90
  91         p = buf;
  92         if (pi->alt) {
  93                 tx = t;
  94                 if (t >= YEAR) {
  95                         p += sprintf(p, "%jdy", t / YEAR);
  96                         t %= YEAR;
  97                 }
  98                 if (tx >= DAY && (t != 0 || prec != 0)) {
  99                         p += sprintf(p, "%jdd", t / DAY);
 100                         t %= DAY;
 101                 }
 102                 if (tx >= HOUR && (t != 0 || prec != 0)) {
 103                         p += sprintf(p, "%jdh", t / HOUR);
 104                         t %= HOUR;
 105                 }
 106                 if (tx >= MINUTE && (t != 0 || prec != 0)) {
 107                         p += sprintf(p, "%jdm", t / MINUTE);
 108                         t %= MINUTE;
 109                 }
 110                 if (t != 0 || tx == 0 || prec != 0)
 111                         p += sprintf(p, "%jds", t);
 112         } else  {
 113                 p += sprintf(p, "%jd", (intmax_t)t);
 114         }
 115         if (prec != 0) {
 116                 for (i = prec; i < 9; i++)
 117                         nsec /= 10;
 118                 p += sprintf(p, ".%.*d", prec, nsec);
 119         }
 120         ret = __printf_out(io, pi, buf, p - buf);
 121         __printf_flush(io);
 122         return (ret);
 123 }