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* @file date.c date formatting routines
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* Copyright (C) 2008-2009 Lars Lindner <lars.lindner@gmail.com>
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* Copyright (C) 2004-2006 Nathan J. Conrad <t98502@users.sourceforge.net>
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* The date formatting was reused from the Evolution code base
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* Author: Chris Lahey <clahey@ximian.com
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* Copyright 2001, Ximian, Inc.
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* parts of the RFC822 timezone decoding were reused from the gmime source
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* Authors: Michael Zucchi <notzed@helixcode.com>
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* Jeffrey Stedfast <fejj@helixcode.com>
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* Copyright 2000 Helix Code, Inc. (www.helixcode.com)
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#define _XOPEN_SOURCE 600 /* glibc2 needs this (man strptime) */
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#define TIMESTRLEN 256
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/* date formatting methods */
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/* This function is originally from the Evolution 2.6.2 code (e-cell-date.c) */
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date_format_nice (time_t date)
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time_t nowdate = time(NULL);
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struct tm then, now, yesterday;
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gboolean done = FALSE;
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buf = g_new0(gchar, TIMESTRLEN + 1);
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localtime_r (&date, &then);
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localtime_r (&nowdate, &now);
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/* if (nowdate - date < 60 * 60 * 8 && nowdate > date) {
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e_utf8_strftime_fix_am_pm (buf, TIMESTRLEN, _("%l:%M %p"), &then);
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if (then.tm_mday == now.tm_mday &&
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then.tm_mon == now.tm_mon &&
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then.tm_year == now.tm_year) {
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/* translation hint: date format for today, reorder format codes as necessary */
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e_utf8_strftime_fix_am_pm (buf, TIMESTRLEN, _("Today %l:%M %p"), &then);
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yesdate = nowdate - 60 * 60 * 24;
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localtime_r (&yesdate, &yesterday);
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if (then.tm_mday == yesterday.tm_mday &&
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then.tm_mon == yesterday.tm_mon &&
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then.tm_year == yesterday.tm_year) {
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/* translation hint: date format for yesterday, reorder format codes as necessary */
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e_utf8_strftime_fix_am_pm (buf, TIMESTRLEN, _("Yesterday %l:%M %p"), &then);
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for (i = 2; i < 7; i++) {
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yesdate = nowdate - 60 * 60 * 24 * i;
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localtime_r (&yesdate, &yesterday);
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if (then.tm_mday == yesterday.tm_mday &&
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then.tm_mon == yesterday.tm_mon &&
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then.tm_year == yesterday.tm_year) {
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/* translation hint: date format for dates older than 2 days but not older than a week, reorder format codes as necessary */
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e_utf8_strftime_fix_am_pm (buf, TIMESTRLEN, _("%a %l:%M %p"), &then);
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if (then.tm_year == now.tm_year) {
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/* translation hint: date format for dates older than a week but from this year, reorder format codes as necessary */
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e_utf8_strftime_fix_am_pm (buf, TIMESTRLEN, _("%b %d %l:%M %p"), &then);
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/* translation hint: date format for dates from the last years, reorder format codes as necessary */
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e_utf8_strftime_fix_am_pm (buf, TIMESTRLEN, _("%b %d %Y"), &then);
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while ((temp = strstr (temp, " "))) {
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memmove (temp, temp + 1, strlen (temp));
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temp = g_strstrip (buf);
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date_format (time_t date, const gchar *date_format)
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return g_strdup ("");
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localtime_r (&date, &date_tm);
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result = g_new0 (gchar, TIMESTRLEN);
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e_utf8_strftime_fix_am_pm (result, TIMESTRLEN, date_format, &date_tm);
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result = date_format_nice (date);
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/* date parsing methods */
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date_parse_ISO8601 (const gchar *date)
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time_t t, t2, offset = 0;
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gboolean success = FALSE;
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g_assert (date != NULL);
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memset (&tm, 0, sizeof (struct tm));
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/* we expect at least something like "2003-08-07T15:28:19" and
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don't require the second fractions and the timezone info
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the most specific format: YYYY-MM-DDThh:mm:ss.sTZD
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/* full specified variant */
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pos = strptime (date, "%t%Y-%m-%dT%H:%M%t", &tm);
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if (isdigit (pos[0]) && !isdigit (pos[1])) {
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tm.tm_sec = pos[0] - '0';
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} else if (isdigit (pos[0]) && isdigit (pos[1])) {
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tm.tm_sec = 10*(pos[0]-'0') + pos[1] - '0';
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/* Parse second fractions */
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while (*pos == '.' || isdigit (pos[0]))
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else if ((*pos == '+' || *pos == '-') && isdigit (pos[1]) && isdigit (pos[2]) && strlen (pos) >= 3) {
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offset = (10*(pos[1] - '0') + (pos[2] - '0')) * 60 * 60;
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if (pos[3] == ':' && isdigit (pos[4]) && isdigit (pos[5]))
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offset += (10*(pos[4] - '0') + (pos[5] - '0')) * 60;
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else if (isdigit (pos[3]) && isdigit (pos[4]))
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offset += (10*(pos[3] - '0') + (pos[4] - '0')) * 60;
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offset *= (pos[0] == '+') ? 1 : -1;
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} else if (NULL != strptime (date, "%t%Y-%m-%d", &tm)) {
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/* there were others combinations too... */
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if ((time_t)(-1) != (t = mktime (&tm))) {
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/* Correct for the local timezone*/
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gmtime_r (&t, &tmp_tm);
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t2 = mktime (&tmp_tm);
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debug0 (DEBUG_PARSING, "Internal error! time conversion error! mktime failed!");
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debug0 (DEBUG_PARSING, "Invalid ISO8601 date format! Ignoring <dc:date> information!");
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/* in theory, we'd need only the RFC822 timezones here
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in practice, feeds also use other timezones... */
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/** @returns timezone offset in seconds */
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date_parse_rfc822_tz (char *token)
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const char *inptr = token;
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int num_timezones = sizeof (tz_offsets) / sizeof ((tz_offsets)[0]);
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if (*inptr == '+' || *inptr == '-') {
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offset = atoi (inptr);
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for (t = 0; t < num_timezones; t++)
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if (!strncmp (inptr, tz_offsets[t].name, strlen (tz_offsets[t].name))) {
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offset = tz_offsets[t].offset;
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return 60 * ((offset / 100) * 60 + (offset % 100));
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date_parse_RFC822 (const gchar *date)
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gboolean success = FALSE;
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memset (&tm, 0, sizeof (struct tm));
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/* we expect at least something like "03 Dec 12 01:38:34"
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and don't require a day of week or the timezone
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the most specific format we expect: "Fri, 03 Dec 12 01:38:34 CET"
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/* skip day of week */
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pos = g_utf8_strchr(date, -1, ',');
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/* we expect English month names, so we set the locale */
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oldlocale = g_strdup (setlocale (LC_TIME, NULL));
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setlocale (LC_TIME, "C");
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/* standard format with seconds and 4 digit year */
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if (NULL != (pos = strptime ((const char *)date, " %d %b %Y %T", &tm)))
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/* non-standard format without seconds and 4 digit year */
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else if (NULL != (pos = strptime ((const char *)date, " %d %b %Y %H:%M", &tm)))
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/* non-standard format with seconds and 2 digit year */
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else if (NULL != (pos = strptime ((const char *)date, " %d %b %y %T", &tm)))
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/* non-standard format without seconds 2 digit year */
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else if (NULL != (pos = strptime ((const char *)date, " %d %b %y %H:%M", &tm)))
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while (pos && *pos != '\0' && isspace ((int)*pos)) /* skip whitespaces before timezone */
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setlocale (LC_TIME, oldlocale); /* and reset it again */
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if ((time_t)(-1) != (t = mktime (&tm))) {
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/* GMT time, with no daylight savings time
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correction. (Usually, there is no daylight savings
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time since the input is GMT.) */
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t = t - date_parse_rfc822_tz (pos);
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t2 = mktime (gmtime(&t));
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debug0 (DEBUG_PARSING, "internal error! time conversion error! mktime failed!");
added
removed
src/date.c
