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/*
Time formatting functions
Copyright (C) 1994-2023
Free Software Foundation, Inc.
Written by:
Miguel de Icaza, 1994, 1995, 1996
Janne Kukonlehto, 1994, 1995, 1996
Dugan Porter, 1994, 1995, 1996
Jakub Jelinek, 1994, 1995, 1996
Mauricio Plaza, 1994, 1995, 1996
The file_date routine is mostly from GNU's fileutils package,
written by Richard Stallman and David MacKenzie.
This file is part of the Midnight Commander.
The Midnight Commander 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.
The Midnight Commander 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/>.
*/
/** \file
* \brief Source: time formatting functions
*/
#include <config.h>
#include <stdlib.h>
#include <limits.h> /* MB_LEN_MAX */
#include "lib/global.h"
#include "lib/strutil.h"
#include "lib/timefmt.h"
/*** global variables ****************************************************************************/
char *user_recent_timeformat = NULL; /* time format string for recent dates */
char *user_old_timeformat = NULL; /* time format string for older dates */
/*** file scope macro definitions ****************************************************************/
/*** file scope type declarations ****************************************************************/
/*** forward declarations (file scope functions) *************************************************/
/*** file scope variables ************************************************************************/
/*
* Cache variable for the i18n_checktimelength function,
* initially set to a clearly invalid value to show that
* it hasn't been initialized yet.
*/
static size_t i18n_timelength_cache = MAX_I18NTIMELENGTH + 1;
/* --------------------------------------------------------------------------------------------- */
/*** file scope functions ************************************************************************/
/* --------------------------------------------------------------------------------------------- */
/* --------------------------------------------------------------------------------------------- */
/*** public functions ****************************************************************************/
/* --------------------------------------------------------------------------------------------- */
/**
* Check strftime() results. Some systems (i.e. Solaris) have different
* short-month and month name sizes for different locales
*/
size_t
i18n_checktimelength (void)
{
size_t length = 0;
time_t testtime;
struct tm *lt;
if (i18n_timelength_cache <= MAX_I18NTIMELENGTH)
return i18n_timelength_cache;
testtime = time (NULL);
lt = localtime (&testtime);
if (lt == NULL)
{
/* huh, localtime() doesn't seem to work ... falling back to "(invalid)" */
length = str_term_width1 (_(INVALID_TIME_TEXT));
}
else
{
char buf[MB_LEN_MAX * MAX_I18NTIMELENGTH + 1];
size_t tlen;
/* We are interested in the longest possible date */
lt->tm_sec = lt->tm_min = lt->tm_hour = lt->tm_mday = 10;
/* Loop through all months to find out the longest one */
for (lt->tm_mon = 0; lt->tm_mon < 12; lt->tm_mon++)
{
strftime (buf, sizeof (buf) - 1, user_recent_timeformat, lt);
tlen = (size_t) str_term_width1 (buf);
length = MAX (tlen, length);
strftime (buf, sizeof (buf) - 1, user_old_timeformat, lt);
tlen = (size_t) str_term_width1 (buf);
length = MAX (tlen, length);
}
tlen = (size_t) str_term_width1 (_(INVALID_TIME_TEXT));
length = MAX (tlen, length);
}
/* Don't handle big differences. Use standard value (email bug, please) */
if (length > MAX_I18NTIMELENGTH || length < MIN_I18NTIMELENGTH)
length = STD_I18NTIMELENGTH;
/* Save obtained value to the cache */
i18n_timelength_cache = length;
return i18n_timelength_cache;
}
/* --------------------------------------------------------------------------------------------- */
const char *
file_date (time_t when)
{
static char timebuf[MB_LEN_MAX * MAX_I18NTIMELENGTH + 1];
time_t current_time = time (NULL);
const char *fmt;
if (current_time > when + 6L * 30L * 24L * 60L * 60L /* Old. */
|| current_time < when - 60L * 60L) /* In the future. */
/* The file is fairly old or in the future.
POSIX says the cutoff is 6 months old;
approximate this by 6*30 days.
Allow a 1 hour slop factor for what is considered "the future",
to allow for NFS server/client clock disagreement.
Show the year instead of the time of day. */
fmt = user_old_timeformat;
else
fmt = user_recent_timeformat;
FMT_LOCALTIME (timebuf, sizeof (timebuf), fmt, when);
return timebuf;
}
/* --------------------------------------------------------------------------------------------- */
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