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/*
* Format clock_t-typed values.
* Copyright (c) 2018-2022 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <inttypes.h>
#include <math.h>
#include <stdint.h>
#include <stdio.h>
#include <unistd.h>
const char *
clock_t_str(uint64_t val, char *str, size_t str_size)
{
static long clk_tck;
static int precision;
if (!clk_tck) {
clk_tck = sysconf(_SC_CLK_TCK);
precision = clk_tck > 1 ? MIN((int) ceil(log10(clk_tck - 1)), 9)
: 0;
}
if ((clk_tck > 0) && val) {
snprintf(str, str_size, "%" PRIu64 " /* %" PRIu64 ".%0*u s */",
val, val / clk_tck, precision,
(unsigned) round(((double) (val % clk_tck) / clk_tck)
* pow(10, precision)));
} else {
snprintf(str, str_size, "%" PRIu64, val);
}
return str;
}
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