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LibTimeZone: Add an API to retrieve the system's current time zone

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This is a wrapper API around the POSIX tzset / tzname information. It
is to help ensure that tzset is invoked before accessing tzname.
This commit is contained in:
Timothy Flynn 2022-01-11 23:21:36 -05:00 • committed by Linus Groh
parent 9a7cd8fef8
commit 8a4ac9c387
2 changed files with 14 additions and 0 deletions
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12
Userland/Libraries/LibTimeZone/TimeZone.cpp
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@ -5,6 +5,7 @@
*/ */
#include <LibTimeZone/TimeZone.h> #include <LibTimeZone/TimeZone.h>
#include <time.h>
namespace TimeZone { namespace TimeZone {
@ -19,6 +20,17 @@ enum class TimeZone : u16 {
}; };
#endif #endif
StringView current_time_zone()
{
static bool initialized_time_zone = false;
if (!initialized_time_zone) {
initialized_time_zone = true;
tzset();
}
return tzname[0];
}
Optional<TimeZone> __attribute__((weak)) time_zone_from_string([[maybe_unused]] StringView time_zone) Optional<TimeZone> __attribute__((weak)) time_zone_from_string([[maybe_unused]] StringView time_zone)
{ {
#if !ENABLE_TIME_ZONE_DATA #if !ENABLE_TIME_ZONE_DATA

2
Userland/Libraries/LibTimeZone/TimeZone.h
View file

@ -14,6 +14,8 @@
namespace TimeZone { namespace TimeZone {
StringView current_time_zone();
Optional<TimeZone> time_zone_from_string(StringView time_zone); Optional<TimeZone> time_zone_from_string(StringView time_zone);
StringView time_zone_to_string(TimeZone time_zone); StringView time_zone_to_string(TimeZone time_zone);
Optional<StringView> canonicalize_time_zone(StringView time_zone); Optional<StringView> canonicalize_time_zone(StringView time_zone);