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Diffstat (limited to '')
| -rw-r--r-- | lib/timefmt.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/lib/timefmt.c b/lib/timefmt.c new file mode 100644 index 0000000..43bd429 --- /dev/null +++ b/lib/timefmt.c @@ -0,0 +1,156 @@ +/* + 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; +} + +/* --------------------------------------------------------------------------------------------- */ |