/**
* e_cal_match_tzid:
* matches a TZID against the system timezone definitions
* and returns the matching TZID, or NULL if none found
*/
const char *e_cal_match_tzid(const char *tzid)
{
const char *location;
const char *systzid;
size_t len = strlen(tzid);
ssize_t eostr;
/*
* Try without any trailing spaces/digits: they might have been added
* by e_cal_check_timezones() in order to distinguish between
* different incompatible definitions. At that time mapping
* to system time zones must have failed, but perhaps now
* we have better code and it succeeds...
*/
eostr = len - 1;
while (eostr >= 0 &&
isdigit(tzid[eostr])) {
eostr--;
}
while (eostr >= 0 &&
isspace(tzid[eostr])) {
eostr--;
}
if (eostr + 1 < len) {
char *strippedtzid = g_strndup(tzid, eostr + 1);
if (strippedtzid) {
systzid = e_cal_match_tzid(strippedtzid);
g_free(strippedtzid);
if (systzid) {
return systzid;
}
}
}
/*
* old-style Evolution: /softwarestudio.org/Olson_20011030_5/America/Denver
*
* jump from one slash to the next and check whether the remainder
* is a known location; start with the whole string (just in case)
*/
for (location = tzid;
location && location[0];
location = strchr(location + 1, '/')) {
systzid = e_cal_match_location(location[0] == '/' ?
location + 1 :
location);
if (systzid) {
return systzid;
}
}
/* TODO: lookup table for Exchange TZIDs */
return NULL;
}
/**
* e_cal_match_tzid:
* @tzid: a timezone ID
*
* Matches @tzid against the system timezone definitions
* and returns the matching TZID, or %NULL if none found
*
* Since: 2.24
*/
const gchar *
e_cal_match_tzid (const gchar *tzid)
{
const gchar *location;
const gchar *systzid = NULL;
gsize len = strlen (tzid);
gssize eostr;
/*
* Try without any trailing spaces/digits: they might have been added
* by e_cal_check_timezones() in order to distinguish between
* different incompatible definitions. At that time mapping
* to system time zones must have failed, but perhaps now
* we have better code and it succeeds...
*/
eostr = len - 1;
while (eostr >= 0 && isdigit (tzid[eostr])) {
eostr--;
}
while (eostr >= 0 && isspace (tzid[eostr])) {
eostr--;
}
if (eostr + 1 < len) {
gchar *strippedtzid = g_strndup (tzid, eostr + 1);
if (strippedtzid) {
systzid = e_cal_match_tzid (strippedtzid);
g_free (strippedtzid);
if (systzid) {
goto done;
}
}
}
/*
* old-style Evolution: /softwarestudio.org/Olson_20011030_5/America/Denver
*
* jump from one slash to the next and check whether the remainder
* is a known location; start with the whole string (just in case)
*/
for (location = tzid;
location && location[0];
location = strchr (location + 1, '/')) {
systzid = e_cal_match_location (
location[0] == '/' ?
location + 1 : location);
if (systzid) {
goto done;
}
}
/* TODO: lookup table for Exchange TZIDs */
done:
if (systzid && !strcmp (systzid, "UTC")) {
/*
* UTC is special: it doesn't have a real VTIMEZONE in
* EDS. Matching some pseudo VTTIMEZONE with UTC in the TZID
* to our internal UTC "timezone" breaks
* e_cal_check_timezones() (it patches the event to use
* TZID=UTC, which cannot be exported correctly later on) and
* e_cal_get_timezone() (triggers an assert).
*
* So better avoid matching against it...
*/
return NULL;
} else {
return systzid;
}
}