strace/tests/print_time.c

55 lines
1.1 KiB
C

/*
* Print time_t and nanoseconds in symbolic format.
*
* Copyright (c) 2015-2017 Dmitry V. Levin <ldv@altlinux.org>
* Copyright (c) 2017-2018 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <stdio.h>
#include <time.h>
static void
print_time_t_ex(const time_t t, const unsigned long long part_sec,
const unsigned int max_part_sec, const int width,
const int comment)
{
if ((!t && !part_sec) || part_sec > max_part_sec)
return;
const struct tm *const p = localtime(&t);
char buf[256];
if (!p || !strftime(buf, sizeof(buf), "%FT%T", p))
return;
if (comment)
fputs(" /* ", stdout);
fputs(buf, stdout);
if (part_sec)
printf(".%0*llu", width, part_sec);
if (strftime(buf, sizeof(buf), "%z", p))
fputs(buf, stdout);
if (comment)
fputs(" */", stdout);
}
void
print_time_t_nsec(const time_t t, const unsigned long long nsec, int comment)
{
print_time_t_ex(t, nsec, 999999999, 9, comment);
}
void
print_time_t_usec(const time_t t, const unsigned long long usec, int comment)
{
print_time_t_ex(t, usec, 999999, 6, comment);
}