continuity_analyzer.py

#!/usr/bin/python

"""Extract and analyze lines of the format

Decoded time: 18-05-14 1 19:36:05 CEST ..

from stdin or from file. Will search if the
decoded time has any unexpected jumps. Intended
for analyzing output of the "Swiss Army Debug Helper"
in mode "Da"
"""

import fileinput
import datetime
import re


#                  Decoded time:   1 8 -  0 5 -  1 4   1   1 9 :  3 6 :  0 5
regex = re.compile('^Decoded time: (\d\d)-(\d\d)-(\d\d) \d (\d\d):(\d\d):(\d\d)')

one_second   = datetime.timedelta(seconds=1)
zero_seconds = datetime.timedelta(seconds=0)
previous_time = None
for line in fileinput.input():
    match = regex.match(line)
    if match:
        year, month, day, hour, minute, second = (int(x) for x in match.group(1, 2, 3, 4, 5, 6))
        year += 2000

        parsed_time = datetime.datetime(year, month, day, hour, minute, second)
        if previous_time:
            delta = parsed_time - previous_time
            if delta > one_second or delta < zero_seconds:
                print "Discontinuity detected, " + str(previous_time) + " -> " + str(parsed_time)
                print line

        previous_time = parsed_time