/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ Permission to use, copy, modify, and/or distribute this software for         │
│ any purpose with or without fee is hereby granted, provided that the         │
│ above copyright notice and this permission notice appear in all copies.      │
│                                                                              │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
│ PERFORMANCE OF THIS SOFTWARE.                                                │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/fmt/fmt.h"
#include "libc/time/struct/tm.h"
#include "libc/time/time.h"

static unsigned clip(unsigned index, unsigned count) {
  return index < count ? index : 0;
}

/**
 * Converts date time to string.
 *
 * @param buf needs to have 64 bytes
 * @return pointer to buf
 * @see asctime_r for reentrant version
 */
char *asctime_r(const struct tm *date, char buf[hasatleast 64]) {
  (snprintf)(buf, 64, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n",
             kWeekdayNameShort[clip(date->tm_wday, 7)],
             kMonthNameShort[clip(date->tm_mon, 12)], date->tm_mday,
             date->tm_hour, date->tm_min, date->tm_sec, 1900 + date->tm_year);
  return buf;
}