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// SPDX-FileCopyrightText: 2021-2024, Alejandro Colomar <alx@kernel.org>
// SPDX-FileCopyrightText: 2024, Tobias Stoeckmann <tobias@stoeckmann.org>
// SPDX-License-Identifier: BSD-3-Clause
#ifndef SHADOW_INCLUDE_LIB_TIME_DAY_TO_STR_H_
#define SHADOW_INCLUDE_LIB_TIME_DAY_TO_STR_H_
#include <config.h>
#include <time.h>
#include "defines.h"
#include "sizeof.h"
#include "string/strtcpy.h"
#define DAY_TO_STR(str, day) day_to_str(NITEMS(str), str, day)
inline void day_to_str(size_t size, char buf[size], long day);
inline void
day_to_str(size_t size, char buf[size], long day)
{
time_t date;
struct tm tm;
if (day < 0) {
strtcpy(buf, "never", size);
return;
}
if (__builtin_mul_overflow(day, DAY, &date)) {
strtcpy(buf, "future", size);
return;
}
if (gmtime_r(&date, &tm) == NULL) {
strtcpy(buf, "future", size);
return;
}
if (strftime(buf, size, "%Y-%m-%d", &tm) == 0)
strtcpy(buf, "future", size);
}
#endif // include guard
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