xprintf_time.c revision 199783 
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: head/lib/libc/stdio/xprintf_time.c 199783 2009-11-25 04:35:54Z wollman $
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
43int
44__printf_arginfo_time(const struct printf_info *pi, size_t n, int *argt)
45{
46
47	assert(n >= 1);
48	argt[0] = PA_POINTER;
49	return (1);
50}
51#define MINUTE 60
52#define HOUR	(60 * MINUTE)
53#define DAY	(24 * HOUR)
54#define YEAR	(365 * DAY)
55
56int
57__printf_render_time(struct __printf_io *io, const struct printf_info *pi, const void *const *arg)
58{
59	char buf[100];
60	char *p;
61	struct timeval *tv;
62	struct timespec *ts;
63	time_t *tp;
64	intmax_t t, tx;
65	int i, prec, nsec;
66
67	if (pi->is_long) {
68		tv = *((struct timeval **)arg[0]);
69		t = tv->tv_sec;
70		nsec = tv->tv_usec * 1000;
71		prec = 6;
72	} else if (pi->is_long_double) {
73		ts = *((struct timespec **)arg[0]);
74		t = ts->tv_sec;
75		nsec = ts->tv_nsec;
76		prec = 9;
77	} else {
78		tp = *((time_t **)arg[0]);
79		t = *tp;
80		nsec = 0;
81		prec = 0;
82	}
83
84	p = buf;
85	if (pi->alt) {
86		tx = t;
87		if (t >= YEAR) {
88			p += sprintf(p, "%jdy", t / YEAR);
89			t %= YEAR;
90		}
91		if (t >= DAY && t != 0) {
92			p += sprintf(p, "%jdd", t / DAY);
93			t %= DAY;
94		}
95		if (t >= HOUR && t != 0) {
96			p += sprintf(p, "%jdh", t / HOUR);
97			t %= HOUR;
98		}
99		if (t >= MINUTE && t != 0) {
100			p += sprintf(p, "%jdm", t / MINUTE);
101			t %= MINUTE;
102		}
103		if (t != 0 || tx == 0)
104			p += sprintf(p, "%jds", t);
105	} else  {
106		p += sprintf(p, "%jd", (intmax_t)t);
107	}
108	if (pi->is_long || pi->is_long_double) {
109		if (pi->prec >= 0)
110			prec = pi->prec;
111		for (i = prec; i < 9; i++)
112			nsec /= 10;
113		p += sprintf(p, ".%.*d", prec, nsec);
114	}
115	return(__printf_out(io, pi, buf, p - buf));
116}
117