1 files changed, 129 insertions, 0 deletions
diff --git a/rdiff-backup/src/ttime.py b/rdiff-backup/src/ttime.py
new file mode 100644
index 0000000..c8bb58e
--- /dev/null
+++ b/rdiff-backup/src/ttime.py
@@ -0,0 +1,129 @@
+execfile("log.py")
+import time, types
+
+#######################################################################
+#
+# ttime - Provide Time class, which contains time related functions.
+#
+
+class TimeException(Exception): pass
+
+class Time:
+	"""Functions which act on the time"""
+	_interval_conv_dict = {"s": 1, "m": 60, "h": 3600,
+						   "D": 86400, "M": 30*86400, "Y": 365*86400}
+
+	def setcurtime(cls, curtime = None):
+		"""Sets the current time in curtime and curtimestr on all systems"""
+		t = curtime or time.time()
+		for conn in Globals.connections:
+			conn.Time.setcurtime_local(t, cls.timetostring(t))
+
+	def setcurtime_local(cls, timeinseconds, timestr):
+		"""Only set the current time locally"""
+		cls.curtime = timeinseconds
+		cls.curtimestr = timestr
+
+	def setprevtime(cls, timeinseconds):
+		"""Sets the previous inc time in prevtime and prevtimestr"""
+		assert timeinseconds > 0, timeinseconds
+		timestr = cls.timetostring(timeinseconds)
+		for conn in Globals.connections:
+			conn.Time.setprevtime_local(timeinseconds, timestr)
+
+	def setprevtime_local(cls, timeinseconds, timestr):
+		"""Like setprevtime but only set the local version"""
+		cls.prevtime = timeinseconds
+		cls.prevtimestr = timestr
+
+	def timetostring(cls, timeinseconds):
+		"""Return w3 datetime compliant listing of timeinseconds"""
+		return time.strftime("%Y-%m-%dT%H" + Globals.time_separator +
+							 "%M" + Globals.time_separator + "%S",
+							 time.localtime(timeinseconds)) + cls.gettzd()
+
+	def stringtotime(cls, timestring):
+		"""Return time in seconds from w3 timestring
+
+		If there is an error parsing the string, or it doesn't look
+		like a w3 datetime string, return None.
+
+		"""
+		try:
+			date, daytime = timestring[:19].split("T")
+			year, month, day = map(int, date.split("-"))
+			hour, minute, second = map(int,
+									   daytime.split(Globals.time_separator))
+			assert 1900 < year < 2100, year
+			assert 1 <= month <= 12
+			assert 1 <= day <= 31
+			assert 0 <= hour <= 23
+			assert 0 <= minute <= 59
+			assert 0 <= second <= 61  # leap seconds
+			timetuple = (year, month, day, hour, minute, second, -1, -1, -1)
+			if time.daylight:
+				utc_in_secs = time.mktime(timetuple) - time.altzone
+			else: utc_in_secs = time.mktime(timetuple) - time.timezone
+
+			return utc_in_secs + cls.tzdtoseconds(timestring[19:])
+		except (TypeError, ValueError, AssertionError): return None
+
+	def timetopretty(cls, timeinseconds):
+		"""Return pretty version of time"""
+		return time.asctime(time.localtime(timeinseconds))
+
+	def stringtopretty(cls, timestring):
+		"""Return pretty version of time given w3 time string"""
+		return cls.timetopretty(cls.stringtotime(timestring))
+
+	def intstringtoseconds(cls, interval_string):
+		"""Convert a string expressing an interval to seconds"""
+		def error():
+			raise TimeException('Bad interval string "%s"' % interval_string)
+		if len(interval_string) < 2: error()
+		try: num, ext = int(interval_string[:-1]), interval_string[-1]
+		except ValueError: error()
+		if not ext in cls._interval_conv_dict or num < 0: error()
+		return num*cls._interval_conv_dict[ext]
+
+	def gettzd(cls):
+		"""Return w3's timezone identification string.
+
+		Expresed as [+/-]hh:mm.  For instance, PST is -08:00.  Zone is
+		coincides with what localtime(), etc., use.
+
+		"""
+		if time.daylight: offset = -1 * time.altzone/60
+		else: offset = -1 * time.timezone/60
+		if offset > 0: prefix = "+"
+		elif offset < 0: prefix = "-"
+		else: return "Z" # time is already in UTC
+
+		hours, minutes = map(abs, divmod(offset, 60))
+		assert 0 <= hours <= 23
+		assert 0 <= minutes <= 59
+		return "%s%02d%s%02d" % (prefix, hours,
+								 Globals.time_separator, minutes)
+
+	def tzdtoseconds(cls, tzd):
+		"""Given w3 compliant TZD, return how far ahead UTC is"""
+		if tzd == "Z": return 0
+		assert len(tzd) == 6 # only accept forms like +08:00 for now
+		assert (tzd[0] == "-" or tzd[0] == "+") and \
+			   tzd[3] == Globals.time_separator
+		return -60 * (60 * int(tzd[:3]) + int(tzd[4:]))
+
+	def cmp(cls, time1, time2):
+		"""Compare time1 and time2 and return -1, 0, or 1"""
+		if type(time1) is types.StringType:
+			time1 = cls.stringtotime(time1)
+			assert time1 is not None
+		if type(time2) is types.StringType:
+			time2 = cls.stringtotime(time2)
+			assert time2 is not None
+		
+		if time1 < time2: return -1
+		elif time1 == time2: return 0
+		else: return 1
+
+MakeClass(Time)