sortix-mirror/libc/time/asctime_r.c

44 lines
1.7 KiB
C

/*
* Copyright (c) 2013 Jonas 'Sortie' Termansen.
*
* Permission to use, copy, modify, and 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.
*
* time/asctime_r.c
* Convert date and time to a string.
*/
#include <assert.h>
#include <time.h>
#include <stdio.h>
// TODO: Oh god. This function is horrible! It's obsolescent in POSIX - but it's
// still widely used and I need it at the moment to port software. Please
// do remove this function when all the calls to it has been purged.
char* asctime_r(const struct tm* tm, char* buf)
{
static char weekday_names[7][4] =
{ "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
static char month_names[12][4] =
{ "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct",
"Nov", "Dec" };
sprintf(buf, "%.3s %.3s%3d %.2d:%.2d%.2d %d\n",
weekday_names[tm->tm_wday],
month_names[tm->tm_mon],
tm->tm_mday,
tm->tm_hour,
tm->tm_min,
tm->tm_sec,
tm->tm_year + 1900);
return buf;
}