View of xos/usr/lib/libc/ctime.c

/* Copyright (C) 2008  Emmanuel Varoquaux
 
   This file is part of XOS.
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.
 
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>. */
 
#include "time.h"
 
#include <stdio.h>
 
static struct tm static_tm;
 
struct tm __attribute__ ((weak, visibility ("default"))) *gmtime(const time_t *timep)
{
  return __make_tm(timep, __utc_tz, &static_tm);
}
 
struct tm __attribute__ ((weak, visibility ("default"))) *localtime(const time_t *timep)
{
  __tzset();
  return __make_tm(timep, __current_tz, &static_tm);
}
 
time_t __attribute__ ((weak, visibility ("default"))) mktime(struct tm *tm)
{
  __tzset();
  return __make_time(tm, __current_tz);
}
 
char __attribute__ ((weak, visibility ("default"))) *asctime(const struct tm *tm)
{
  static char wday_name[7][3] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
  static char mon_name[12][3] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
  static char result[26];
 
  sprintf(result, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n",
          wday_name[tm->tm_wday],
          mon_name[tm->tm_mon],
          tm->tm_mday, tm->tm_hour,
          tm->tm_min, tm->tm_sec,
          1900 + tm->tm_year);
  return result;
}
 
char __attribute__ ((weak, visibility ("default"))) *ctime(const time_t *timep)
{
  struct tm *tm;
 
  if (!(tm = localtime(timep)))
    return NULL;
  return asctime(tm);
}