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/* stat-related time functions.
Copyright (C) 2005 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, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
/* Written by Paul Eggert. */
#ifndef STAT_TIME_H
#define STAT_TIME_H 1
#include "timespec.h"
/* STAT_TIMESPEC (ST, ST_XTIM) is the ST_XTIM member for *ST of type
struct timespec, if available. If not, then STAT_TIMESPEC_NS (ST,
ST_XTIM) is the nanosecond component of the ST_XTIM member for *ST,
if available. ST_XTIM can be st_atim, st_ctim, or st_mtim for
access, status change, or data modification time, respectively.
These macros are private to stat-time.h. */
#if defined HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC
# define STAT_TIMESPEC(st, st_xtim) ((st)->st_xtim)
#elif defined HAVE_STRUCT_STAT_ST_ATIMESPEC_TV_NSEC
# define STAT_TIMESPEC(st, st_xtim) ((st)->st_xtim##espec)
#elif defined HAVE_STRUCT_STAT_ST_ATIMENSEC
# define STAT_TIMESPEC_NS(st, st_xtim) ((st)->st_xtim##ensec)
#elif defined HAVE_STRUCT_STAT_ST_ATIM_ST__TIM_TV_NSEC
# define STAT_TIMESPEC_NS(st, st_xtim) ((st)->st_xtim.st__tim.tv_nsec)
#endif
/* Return the nanosecond component of *ST's access time. */
static inline long int
get_stat_atime_ns (struct stat const *st)
{
# if defined STAT_TIMESPEC
return STAT_TIMESPEC (st, st_atim).tv_nsec;
# elif defined STAT_TIMESPEC_NS
return STAT_TIMESPEC_NS (st, st_atim);
# elif defined HAVE_STRUCT_STAT_ST_SPARE1
return st->st_spare1 * 1000;
# else
return 0;
# endif
}
/* Return the nanosecond component of *ST's status change time. */
static inline long int
get_stat_ctime_ns (struct stat const *st)
{
# if defined STAT_TIMESPEC
return STAT_TIMESPEC (st, st_ctim).tv_nsec;
# elif defined STAT_TIMESPEC_NS
return STAT_TIMESPEC_NS (st, st_ctim);
# elif defined HAVE_STRUCT_STAT_ST_SPARE1
return st->st_spare3 * 1000;
# else
return 0;
# endif
}
/* Return the nanosecond component of *ST's data modification time. */
static inline long int
get_stat_mtime_ns (struct stat const *st)
{
# if defined STAT_TIMESPEC
return STAT_TIMESPEC (st, st_mtim).tv_nsec;
# elif defined STAT_TIMESPEC_NS
return STAT_TIMESPEC_NS (st, st_mtim);
# elif defined HAVE_STRUCT_STAT_ST_SPARE1
return st->st_spare2 * 1000;
# else
return 0;
# endif
}
/* Return *ST's access time. */
static inline struct timespec
get_stat_atime (struct stat const *st)
{
#ifdef STAT_TIMESPEC
return STAT_TIMESPEC (st, st_atim);
#else
struct timespec t;
t.tv_sec = st->st_atime;
t.tv_nsec = get_stat_atime_ns (st);
return t;
#endif
}
/* Return *ST's status change time. */
static inline struct timespec
get_stat_ctime (struct stat const *st)
{
#ifdef STAT_TIMESPEC
return STAT_TIMESPEC (st, st_ctim);
#else
struct timespec t;
t.tv_sec = st->st_ctime;
t.tv_nsec = get_stat_ctime_ns (st);
return t;
#endif
}
/* Return *ST's data modification time. */
static inline struct timespec
get_stat_mtime (struct stat const *st)
{
#ifdef STAT_TIMESPEC
return STAT_TIMESPEC (st, st_mtim);
#else
struct timespec t;
t.tv_sec = st->st_mtime;
t.tv_nsec = get_stat_mtime_ns (st);
return t;
#endif
}
/* Set *ST's access time. */
static inline void
set_stat_atime (struct stat *st, struct timespec t)
{
#ifdef STAT_TIMESPEC
STAT_TIMESPEC (st, st_atim) = t;
#else
st->st_atime = t.tv_sec;
# if defined STAT_TIMESPEC_NS
STAT_TIMESPEC_NS (st, st_atim) = t.tv_nsec;
# elif defined HAVE_STRUCT_STAT_ST_SPARE1
st->st_spare1 = t.tv_nsec / 1000;
# endif
#endif
}
/* Set *ST's status change time. */
static inline void
set_stat_ctime (struct stat *st, struct timespec t)
{
#ifdef STAT_TIMESPEC
STAT_TIMESPEC (st, st_ctim) = t;
#else
st->st_ctime = t.tv_sec;
# if defined STAT_TIMESPEC_NS
STAT_TIMESPEC_NS (st, st_ctim) = t.tv_nsec;
# elif defined HAVE_STRUCT_STAT_ST_SPARE1
st->st_spare1 = t.tv_nsec / 1000;
# endif
#endif
}
/* Set *ST's data modification time. */
static inline void
set_stat_mtime (struct stat *st, struct timespec t)
{
#ifdef STAT_TIMESPEC
STAT_TIMESPEC (st, st_mtim) = t;
#else
st->st_mtime = t.tv_sec;
# if defined STAT_TIMESPEC_NS
STAT_TIMESPEC_NS (st, st_mtim) = t.tv_nsec;
# elif defined HAVE_STRUCT_STAT_ST_SPARE1
st->st_spare1 = t.tv_nsec / 1000;
# endif
#endif
}
#endif
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