51 lines
975 B
C
51 lines
975 B
C
// 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/strcpy/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, "%F", &tm) == 0)
|
|
strtcpy(buf, "future", size);
|
|
}
|
|
|
|
|
|
#endif // include guard
|