dmbcs/guile
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Use Gnulib's `stat-time' module; update Gnulib.

Browse source 
This updates Gnulib files to v0.0-4207-gc82b481.

* m4/gnulib-cache.m4: Add `stat-time'.
This commit is contained in:
Ludovic Courtès 2010-09-04 15:16:35 +02:00
commit 9157d90102
49 changed files with 1230 additions and 682 deletions
Download patch file Download diff file Expand all files Collapse all files

187
lib/stat-time.h Normal file
View file

@ -0,0 +1,187 @@
/* stat-related time functions.
Copyright (C) 2005, 2007, 2009-2010 Free Software Foundation, Inc.
This program 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 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Written by Paul Eggert. */
#ifndef STAT_TIME_H
#define STAT_TIME_H 1
#include <sys/stat.h>
#include <time.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, st_mtim, or st_birthtim
for access, status change, data modification, or birth (creation)
time respectively.
These macros are private to stat-time.h. */
#if defined HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC
# ifdef TYPEOF_STRUCT_STAT_ST_ATIM_IS_STRUCT_TIMESPEC
# define STAT_TIMESPEC(st, st_xtim) ((st)->st_xtim)
# else
# define STAT_TIMESPEC_NS(st, st_xtim) ((st)->st_xtim.tv_nsec)
# endif
#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);
# 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);
# 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);
# else
return 0;
# endif
}
/* Return the nanosecond component of *ST's birth time. */
static inline long int
get_stat_birthtime_ns (struct stat const *st)
{
# if defined HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC
return STAT_TIMESPEC (st, st_birthtim).tv_nsec;
# elif defined HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC
return STAT_TIMESPEC_NS (st, st_birthtim);
# else
/* Avoid a "parameter unused" warning. */
(void) st;
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
}
/* Return *ST's birth time, if available; otherwise return a value
with negative tv_nsec. */
static inline struct timespec
get_stat_birthtime (struct stat const *st)
{
struct timespec t;
#if (defined HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC \
|| defined HAVE_STRUCT_STAT_ST_BIRTHTIM_TV_NSEC)
t = STAT_TIMESPEC (st, st_birthtim);
#elif defined HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC
t.tv_sec = st->st_birthtime;
t.tv_nsec = st->st_birthtimensec;
#elif (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
/* Woe32 native platforms (but not Cygwin) put the "file creation
time" in st_ctime (!). See
<http://msdn2.microsoft.com/de-de/library/14h5k7ff(VS.80).aspx>. */
t.tv_sec = st->st_ctime;
t.tv_nsec = 0;
#else
/* Birth time is not supported. Set tv_sec to avoid undefined behavior. */
t.tv_sec = -1;
t.tv_nsec = -1;
/* Avoid a "parameter unused" warning. */
(void) st;
#endif
#if (defined HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC \
|| defined HAVE_STRUCT_STAT_ST_BIRTHTIM_TV_NSEC \
|| defined HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC)
/* FreeBSD and NetBSD sometimes signal the absence of knowledge by
using zero. Attempt to work around this problem. Alas, this can
report failure even for valid time stamps. Also, NetBSD
sometimes returns junk in the birth time fields; work around this
bug if it it is detected. There's no need to detect negative
tv_nsec junk as negative tv_nsec already indicates an error. */
if (t.tv_sec == 0 || 1000000000 <= t.tv_nsec)
t.tv_nsec = -1;
#endif
return t;
}
#endif