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/* Copyright (C) 1995-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <limits.h>
#include <sys/time.h>
#include <sys/timex.h>
#include <kernel-features.h>
#define MAX_SEC (INT_MAX / 1000000L - 2)
#define MIN_SEC (INT_MIN / 1000000L + 2)
#ifndef MOD_OFFSET
#define modes mode
#endif
#ifndef TIMEVAL
#define TIMEVAL timeval
#endif
#ifndef TIMEX
#define TIMEX timex
#endif
#ifndef ADJTIME
#define ADJTIME __adjtime
#endif
#ifndef ADJTIMEX
#define NO_LOCAL_ADJTIME
#define ADJTIMEX(x) INTUSE(__adjtimex) (x)
extern int INTUSE(__adjtimex) (struct timex *__ntx);
#endif
#ifndef LINKAGE
#define LINKAGE
#endif
LINKAGE int
ADJTIME (const struct TIMEVAL *itv, struct TIMEVAL *otv)
{
struct TIMEX tntx;
if (itv)
{
struct TIMEVAL tmp;
/* We will do some check here. */
tmp.tv_sec = itv->tv_sec + itv->tv_usec / 1000000L;
tmp.tv_usec = itv->tv_usec % 1000000L;
if (tmp.tv_sec > MAX_SEC || tmp.tv_sec < MIN_SEC)
{
__set_errno (EINVAL);
return -1;
}
tntx.offset = tmp.tv_usec + tmp.tv_sec * 1000000L;
tntx.modes = ADJ_OFFSET_SINGLESHOT;
}
else
{
#ifdef ADJ_OFFSET_SS_READ
tntx.modes = ADJ_OFFSET_SS_READ;
#else
tntx.modes = 0;
#endif
}
#if defined ADJ_OFFSET_SS_READ && !defined __ASSUME_ADJ_OFFSET_SS_READ
again:
#endif
if (__builtin_expect (ADJTIMEX (&tntx) < 0, 0))
{
#if defined ADJ_OFFSET_SS_READ && !defined __ASSUME_ADJ_OFFSET_SS_READ
if (itv && errno == EINVAL && tntx.modes == ADJ_OFFSET_SS_READ)
{
tntx.modes = ADJ_OFFSET_SINGLESHOT;
goto again;
}
#endif
return -1;
}
if (otv)
{
if (tntx.offset < 0)
{
otv->tv_usec = -(-tntx.offset % 1000000);
otv->tv_sec = -(-tntx.offset / 1000000);
}
else
{
otv->tv_usec = tntx.offset % 1000000;
otv->tv_sec = tntx.offset / 1000000;
}
}
return 0;
}
#ifdef NO_LOCAL_ADJTIME
weak_alias (__adjtime, adjtime)
#endif
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