mirror of https://github.com/MidnightCommander/mc
146 lines
4.9 KiB
C
146 lines
4.9 KiB
C
/*
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Time formatting functions
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Copyright (C) 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003,
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2004, 2005, 2007, 2009, 2010, 2011
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The Free Software Foundation, Inc.
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Written by:
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Miguel de Icaza, 1994, 1995, 1996
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Janne Kukonlehto, 1994, 1995, 1996
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Dugan Porter, 1994, 1995, 1996
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Jakub Jelinek, 1994, 1995, 1996
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Mauricio Plaza, 1994, 1995, 1996
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The file_date routine is mostly from GNU's fileutils package,
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written by Richard Stallman and David MacKenzie.
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This file is part of the Midnight Commander.
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The Midnight Commander is free software: you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of the License,
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or (at your option) any later version.
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The Midnight Commander is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** \file
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* \brief Source: time formatting functions
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*/
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#include <config.h>
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#include <stdlib.h>
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#include "lib/global.h"
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#include "lib/strutil.h"
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#include "lib/timefmt.h"
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/*** global variables ****************************************************************************/
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char *user_recent_timeformat = NULL; /* time format string for recent dates */
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char *user_old_timeformat = NULL; /* time format string for older dates */
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/*** file scope macro definitions ****************************************************************/
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/*** file scope type declarations ****************************************************************/
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/*** file scope variables ************************************************************************/
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/*
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* Cache variable for the i18n_checktimelength function,
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* initially set to a clearly invalid value to show that
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* it hasn't been initialized yet.
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*/
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static size_t i18n_timelength_cache = MAX_I18NTIMELENGTH + 1;
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/*** file scope functions ************************************************************************/
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/*** public functions ****************************************************************************/
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/* --------------------------------------------------------------------------------------------- */
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/**
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* Check strftime() results. Some systems (i.e. Solaris) have different
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* short-month and month name sizes for different locales
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*/
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size_t
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i18n_checktimelength (void)
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{
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size_t length = 0;
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const time_t testtime = time (NULL);
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struct tm *lt = localtime (&testtime);
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if (i18n_timelength_cache <= MAX_I18NTIMELENGTH)
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return i18n_timelength_cache;
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if (lt == NULL)
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{
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/* huh, localtime() doesnt seem to work ... falling back to "(invalid)" */
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length = str_term_width1 (_(INVALID_TIME_TEXT));
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}
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else
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{
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char buf[MB_LEN_MAX * MAX_I18NTIMELENGTH + 1];
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/* We are interested in the longest possible date */
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lt->tm_sec = lt->tm_min = lt->tm_hour = lt->tm_mday = 10;
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/* Loop through all months to find out the longest one */
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for (lt->tm_mon = 0; lt->tm_mon < 12; lt->tm_mon++)
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{
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strftime (buf, sizeof (buf) - 1, user_recent_timeformat, lt);
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length = max ((size_t) str_term_width1 (buf), length);
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strftime (buf, sizeof (buf) - 1, user_old_timeformat, lt);
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length = max ((size_t) str_term_width1 (buf), length);
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}
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length = max ((size_t) str_term_width1 (_(INVALID_TIME_TEXT)), length);
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}
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/* Don't handle big differences. Use standard value (email bug, please) */
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if (length > MAX_I18NTIMELENGTH || length < MIN_I18NTIMELENGTH)
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length = STD_I18NTIMELENGTH;
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/* Save obtained value to the cache */
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i18n_timelength_cache = length;
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return i18n_timelength_cache;
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}
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/* --------------------------------------------------------------------------------------------- */
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const char *
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file_date (time_t when)
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{
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static char timebuf[MB_LEN_MAX * MAX_I18NTIMELENGTH + 1];
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time_t current_time = time ((time_t) 0);
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const char *fmt;
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if (current_time > when + 6L * 30L * 24L * 60L * 60L /* Old. */
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|| current_time < when - 60L * 60L) /* In the future. */
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/* The file is fairly old or in the future.
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POSIX says the cutoff is 6 months old;
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approximate this by 6*30 days.
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Allow a 1 hour slop factor for what is considered "the future",
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to allow for NFS server/client clock disagreement.
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Show the year instead of the time of day. */
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fmt = user_old_timeformat;
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else
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fmt = user_recent_timeformat;
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FMT_LOCALTIME (timebuf, sizeof (timebuf), fmt, when);
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return timebuf;
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}
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/* --------------------------------------------------------------------------------------------- */
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