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/*
** Copyright (C) 2012 <djcb@djcbsoftware.nl>
**
** This program 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, 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 General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software Foundation,
** Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**
*/
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include "mu-util.h"
#include "mu-date.h"
const char*
mu_date_str_s (const char* frm, time_t t)
{
struct tm *tmbuf;
static char buf[128];
static int is_utf8 = -1;
if (G_UNLIKELY(is_utf8 == -1))
is_utf8 = mu_util_locale_is_utf8 () ? 1 : 0;
g_return_val_if_fail (frm, NULL);
tmbuf = localtime(&t);
strftime (buf, sizeof(buf), frm, tmbuf);
if (!is_utf8) {
/* charset is _not_ utf8, so we need to convert it, so
* the date could contain locale-specific characters*/
gchar *conv;
GError *err;
err = NULL;
conv = g_locale_to_utf8 (buf, -1, NULL, NULL, &err);
if (err) {
g_warning ("conversion failed: %s", err->message);
g_error_free (err);
strcpy (buf, "<error>");
} else
strncpy (buf, conv, sizeof(buf));
g_free (conv);
}
return buf;
}
char*
mu_date_str (const char *frm, time_t t)
{
return g_strdup (mu_date_str_s(frm, t));
}
const char*
mu_date_display_s (time_t t)
{
time_t now;
static const time_t SECS_IN_DAY = 24 * 60 * 60;
now = time (NULL);
if (ABS(now - t) > SECS_IN_DAY)
return mu_date_str_s ("%x", t);
else
return mu_date_str_s ("%X", t);
}
time_t
mu_date_parse_hdwmy (const char *nptr)
{
long int num;
char *endptr;
time_t now, delta;
time_t never = (time_t)-1;
g_return_val_if_fail (nptr, never);
num = strtol (nptr, &endptr, 10);
if (num <= 0 || num > 9999)
return never;
if (endptr == NULL || *endptr == '\0')
return never;
switch (endptr[0]) {
case 'h': /* hour */
delta = num * 60 * 60; break;
case 'd': /* day */
delta = num * 24 * 60 * 60; break;
case 'w': /* week */
delta = num * 7 * 24 * 60 * 60; break;
case 'm': /* month */
delta = num * 30 * 24 * 60 * 60; break;
case 'y': /* year */
delta = num * 365 * 24 * 60 * 60; break;
default:
return never;
}
now = time(NULL);
return delta <= now ? now - delta : never;
}
/* clear a date of anything non-numberic; static string, non-reentrant */
static char*
clear_date_s (const char *date)
{
static char cleandate [14 + 1];
unsigned u1, u2;
for (u1 = u2 = 0; date[u1] != '\0'; ++u1)
if (isdigit(date[u1]))
cleandate[u2++] = date[u1];
cleandate[u2] = '\0';
return cleandate;
}
const char*
mu_date_complete_s (const char *date, gboolean is_begin)
{
static char fulldate[14 + 1];
static const char* full_begin = "00000101000000";
static const char* full_end = "99991231235959";
char *cleardate;
g_return_val_if_fail (date, NULL);
cleardate = clear_date_s (date);
strncpy (fulldate, is_begin ? full_begin : full_end,
sizeof(fulldate));
memcpy (fulldate, cleardate, strlen(cleardate));
return fulldate;
}
char*
mu_date_complete (const char *date, gboolean is_begin)
{
const char *s;
g_return_val_if_fail (date, NULL);
s = mu_date_complete_s (date, is_begin);
return s ? g_strdup (s) : NULL;
}
const char*
mu_date_interpret_s (const char *datespec, gboolean is_begin)
{
static char fulldate[14 + 1];
time_t now;
g_return_val_if_fail (datespec, NULL);
now = time(NULL);
if (strcmp (datespec, "today") == 0) {
strftime(fulldate, sizeof(fulldate),
is_begin ? "%Y%m%d000000" : "%Y%m%d235959",
localtime(&now));
return fulldate;
}
if (strcmp (datespec, "now") == 0) {
strftime(fulldate, sizeof(fulldate), "%Y%m%d%H%M%S",
localtime(&now));
return fulldate;
}
{
time_t t;
t = mu_date_parse_hdwmy (datespec);
if (t != (time_t)-1) {
strftime(fulldate, sizeof(fulldate), "%Y%m%d%H%M%S",
localtime(&t));
return fulldate;
}
}
return datespec; /* nothing changed */
}
char*
mu_date_interpret (const char *datespec, gboolean is_begin)
{
char *s;
g_return_val_if_fail (datespec, NULL);
s = mu_date_interpret (datespec, is_begin);
return s ? g_strdup(s) : NULL;
}
time_t
mu_date_str_to_time_t (const char* date, gboolean local)
{
struct tm tm;
char mydate[14 + 1]; /* YYYYMMDDHHMMSS */
time_t t;
const char *tz;
memset (&tm, 0, sizeof(struct tm));
strncpy (mydate, date, 15);
mydate[sizeof(mydate)-1]='\0';
g_return_val_if_fail (date, (time_t)-1);
tm.tm_sec = atoi (mydate + 12); mydate[12] = '\0';
tm.tm_min = atoi (mydate + 10); mydate[10] = '\0';
tm.tm_hour = atoi (mydate + 8); mydate[8] = '\0';
tm.tm_mday = atoi (mydate + 6); mydate[6] = '\0';
tm.tm_mon = atoi (mydate + 4) - 1; mydate[4] = '\0';
tm.tm_year = atoi (mydate) - 1900;
tm.tm_isdst = -1; /* figure out the dst */
if (!local) { /* temporarily switch to UTC */
tz = getenv ("TZ");
setenv ("TZ", "", 1);
tzset ();
}
t = mktime (&tm);
if (!local) { /* switch back */
if (tz)
setenv("TZ", tz, 1);
else
unsetenv("TZ");
tzset();
}
return t;
}
const char*
mu_date_time_t_to_str_s (time_t t, gboolean local)
{
/* static char datestr[14 + 1]; /\* YYYYMMDDHHMMSS *\/ */
static char datestr[14+1]; /* YYYYMMDDHHMMSS */
static const char *frm = "%Y%m%d%H%M%S";
strftime (datestr, sizeof(datestr), frm,
local ? localtime (&t) : gmtime(&t));
return datestr;
}
char*
mu_date_time_t_to_str (time_t t, gboolean local)
{
const char* str;
str = mu_date_time_t_to_str_s (t, local);
return str ? g_strdup(str): NULL;
}
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