lib/date.c

   1 /*
   2  * Copyright (c) 2022 Josh Rickmar <jrick@zettaport.com>
   3  *
   4  * Permission to use, copy, modify, and distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <sys/time.h>
  18 #include <sys/types.h>
  19
  20 #include <stdio.h>
  21
  22 #include "got_date.h"
  23
  24 void
  25 got_date_format_gmtoff(char *buf, size_t sz, time_t gmtoff)
  26 {
  27         long long h, m;
  28         char sign = '+';
  29
  30         if (gmtoff < 0) {
  31                 sign = '-';
  32                 gmtoff = -gmtoff;
  33         }
  34
  35         h = (long long)gmtoff / 3600;
  36         m = ((long long)gmtoff - h*3600) / 60;
  37         snprintf(buf, sz, "%c%02lld%02lld", sign, h, m);
  38 }