view lib/time_r.c @ 40214:452ab00796c7

Fix undefined behaviour. * lib/bitrotate.h (rotl16, rotr16, rotl8, rotr8): Case x to 'unsigned int', to avoid shift operations on 'int'. * lib/xmemdup0.c (xmemdup0): Don't invoke memcpy with a zero size. * tests/test-count-leading-zeros.c (main): Use a random number that has as many bits as TYPE, not only 2*15 or 2*31 bits. * tests/test-count-trailing-zeros.c (main): Likewise. * tests/test-count-one-bits.c (main): Likewise. * tests/test-memmem.c: Don't include "null-ptr.h". (main): Use zerosize_ptr() instead of null_ptr(). * modules/memmem-tests (Files): Remove tests/null-ptr.h.
author Bruno Haible <bruno@clisp.org>
date Sat, 09 Mar 2019 20:32:25 +0100
parents b06060465f09
children
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/* Reentrant time functions like localtime_r.

   Copyright (C) 2003, 2006-2007, 2010-2019 Free Software Foundation, Inc.

   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 2, 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 <https://www.gnu.org/licenses/>.  */

/* Written by Paul Eggert.  */

#include <config.h>

#include <time.h>

static struct tm *
copy_tm_result (struct tm *dest, struct tm const *src)
{
  if (! src)
    return 0;
  *dest = *src;
  return dest;
}


struct tm *
gmtime_r (time_t const * restrict t, struct tm * restrict tp)
{
  return copy_tm_result (tp, gmtime (t));
}

struct tm *
localtime_r (time_t const * restrict t, struct tm * restrict tp)
{
  return copy_tm_result (tp, localtime (t));
}