ObjFW  Check-in [33a133cda0]

/*!
 * @brief Initializes an already allocated OFDate with the specified date and
 *	  time since 1970-01-01T00:00:00Z.
 *
 * @param seconds The seconds since 1970-01-01T00:00:00Z
 * @return An initialized OFDate with the specified date and time
 */
- (instancetype)initWithTimeIntervalSince1970: (of_time_interval_t)seconds;


/*!
 * @brief Initializes an already allocated OFDate with the specified date and
 *	  time since now.
 *
 * @param seconds The seconds since now
 * @return An initialized OFDate with the specified date and time

# define trunc(x) ((int64_t)(x))
#endif

@interface OFDate ()
+ (instancetype)of_alloc;
@end

@interface OFDatePlaceholder: OFDate
@end

@interface OFDateSingleton: OFDate
@end

static struct {
	Class isa;
} placeholder;

static OFDateSingleton *distantFuture, *distantPast;

static void
initDistantPast(void)
{
	distantPast = [[OFDateSingleton alloc]
	    initWithTimeIntervalSince1970: -62167219200.0];
}















#if (!defined(HAVE_GMTIME_R) || !defined(HAVE_LOCALTIME_R)) && \
    defined(OF_HAVE_THREADS)
static OFMutex *mutex;
#endif

#ifdef OF_WINDOWS

	seconds += tm->tm_sec;
	/* Time zone */
	seconds += -(double)*tz * 60;

	return seconds;
}

@implementation OFDatePlaceholder
- (instancetype)init
{
	return (id)[[OFDate of_alloc] init];
}

- (instancetype)initWithTimeIntervalSince1970: (of_time_interval_t)seconds
{
	return (id)[[OFDate of_alloc] initWithTimeIntervalSince1970: seconds];
}

- (instancetype)initWithTimeIntervalSinceNow: (of_time_interval_t)seconds
{
	return (id)[[OFDate of_alloc] initWithTimeIntervalSinceNow: seconds];
}

- (instancetype)initWithDateString: (OFString *)string
			    format: (OFString *)format
{
	return (id)[[OFDate of_alloc] initWithDateString: string
						  format: format];
}

- (instancetype)initWithLocalDateString: (OFString *)string
				 format: (OFString *)format
{
	return (id)[[OFDate of_alloc] initWithLocalDateString: string
						       format: format];
}

- (instancetype)initWithSerialization: (OFXMLElement *)element
{
	return (id)[[OFDate of_alloc] initWithSerialization: element];
}
@end

@implementation OFDateSingleton
- (instancetype)autorelease
{
	return self;
}

- (instancetype)retain
{
	return self;
}

- (void)release
{
}

- (unsigned int)retainCount
{
	return OF_RETAIN_COUNT_MAX;
}
@end
















@implementation OFDate
+ (void)initialize
{
#ifdef OF_WINDOWS
	HMODULE module;
#endif

	static of_once_t once = OF_ONCE_INIT;
	of_once(&once, initDistantPast);
	return distantPast;
}

- (instancetype)init
{
	struct timeval t;

	self = [super init];

	OF_ENSURE(gettimeofday(&t, NULL) == 0);

	_seconds = t.tv_sec;
	_seconds += (of_time_interval_t)t.tv_usec / 1000000;

	return self;
}

- (instancetype)initWithTimeIntervalSince1970: (of_time_interval_t)seconds
{
	self = [super init];

	_seconds = seconds;

	return self;
}

- (instancetype)initWithTimeIntervalSinceNow: (of_time_interval_t)seconds
{
	self = [self init];

	_seconds += seconds;

	return self;
}

- (instancetype)initWithDateString: (OFString *)string
			    format: (OFString *)format
{
	self = [super init];

	@try {
		const char *UTF8String = string.UTF8String;
		struct tm tm = { 0 };
		int16_t tz = 0;

		tm.tm_isdst = -1;

		if (of_strptime(UTF8String, format.UTF8String,
		    &tm, &tz) != UTF8String + string.UTF8StringLength)
			@throw [OFInvalidFormatException exception];

		_seconds = tmAndTzToTime(&tm, &tz);
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- (instancetype)initWithLocalDateString: (OFString *)string
				 format: (OFString *)format
{
	self = [super init];

	@try {
		const char *UTF8String = string.UTF8String;
		struct tm tm = { 0 };
		/*
		 * of_strptime() can never set this to INT16_MAX, no matter
		 * what is passed to it, so this is a safe way to figure out if
		 * the date contains a time zone.
		 */
		int16_t tz = INT16_MAX;

		tm.tm_isdst = -1;

		if (of_strptime(UTF8String, format.UTF8String,
		    &tm, &tz) != UTF8String + string.UTF8StringLength)
			@throw [OFInvalidFormatException exception];

		if (tz == INT16_MAX) {
#ifdef OF_WINDOWS
			if (func__mktime64 != NULL) {
				if ((_seconds = func__mktime64(&tm)) == -1)
					@throw [OFInvalidFormatException
					    exception];
			} else {
#endif
				if ((_seconds = mktime(&tm)) == -1)
					@throw [OFInvalidFormatException
					    exception];
#ifdef OF_WINDOWS
			}
#endif
		} else
			_seconds = tmAndTzToTime(&tm, &tz);
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- (instancetype)initWithSerialization: (OFXMLElement *)element
{
	self = [super init];

	@try {
		void *pool = objc_autoreleasePoolPush();


		if (![element.name isEqual: self.className] ||
		    ![element.namespace isEqual: OF_SERIALIZATION_NS])
			@throw [OFInvalidArgumentException exception];

		_seconds = OF_BSWAP_DOUBLE_IF_LE(OF_INT_TO_DOUBLE_RAW(
		    OF_BSWAP64_IF_LE(element.hexadecimalValue)));

		objc_autoreleasePoolPop(pool);
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- (bool)isEqual: (id)object
{
	OFDate *otherDate;

	if (object == self)