xprintf_time.c   [plain text]

/*-
 * Copyright (c) 2005 Poul-Henning Kamp
 * Copyright (c) 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Chris Torek.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD: src/lib/libc/stdio/xprintf_time.c,v 1.6 2011/03/06 19:47:46 pjd Exp $
 */
#include <namespace.h>
#include <stdio.h>
#include <wchar.h>
#include <stdint.h>
#include <assert.h>
#include <sys/time.h>
#include "printf.h"
#include "xprintf_private.h"

__private_extern__ int
__printf_arginfo_time(const struct printf_info *pi, size_t n, int *argt)
{

	assert(n >= 1);
	argt[0] = PA_POINTER;
	return (1);
}
#define MINUTE 60
#define HOUR	(60 * MINUTE)
#define DAY	(24 * HOUR)
#define YEAR	(365 * DAY)

__private_extern__ int
__printf_render_time(struct __printf_io *io, const struct printf_info *pi, const void *const *arg)
{
	char buf[100];
	char *p;
	struct timeval *tv;
	struct timespec *ts;
	time_t *tp;
	intmax_t t, tx;
	int i, prec, nsec, ret;

	if (pi->is_long) {
		tv = *((struct timeval **)arg[0]);
		t = tv->tv_sec;
		nsec = tv->tv_usec * 1000;
		prec = 6;
	} else if (pi->is_long_double) {
		ts = *((struct timespec **)arg[0]);
		t = ts->tv_sec;
		nsec = ts->tv_nsec;
		prec = 9;
	} else {
		tp = *((time_t **)arg[0]);
		t = *tp;
		nsec = 0;
		prec = 0;
	}
	if (pi->is_long || pi->is_long_double) {
		if (pi->prec >= 0) 
			prec = pi->prec;
		if (prec == 0)
			nsec = 0;
	}

	p = buf;
	if (pi->alt) {
		tx = t;
		if (t >= YEAR) {
			p += sprintf(p, "%jdy", t / YEAR);
			t %= YEAR;
		}
		if (tx >= DAY && (t != 0 || prec != 0)) {
			p += sprintf(p, "%jdd", t / DAY);
			t %= DAY;
		}
		if (tx >= HOUR && (t != 0 || prec != 0)) {
			p += sprintf(p, "%jdh", t / HOUR);
			t %= HOUR;
		}
		if (tx >= MINUTE && (t != 0 || prec != 0)) {
			p += sprintf(p, "%jdm", t / MINUTE);
			t %= MINUTE;
		}
		if (t != 0 || tx == 0 || prec != 0)
			p += sprintf(p, "%jds", t);
	} else  {
		p += sprintf(p, "%jd", (intmax_t)t);
	}
	if (prec != 0) {
		for (i = prec; i < 9; i++)
			nsec /= 10;
		p += sprintf(p, ".%.*d", prec, nsec);
	}
	ret = __printf_out(io, pi, buf, p - buf);
	__printf_flush(io);
	return (ret);
}