# Copyright 2017 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""
This script converts two %time% compatible strings passed to it into seconds,
subtracts them, and prints the difference. That's it. It's used by timeit.bat.
"""

import re
import sys


def ParseTime(time_string):
    # Time looks like 15:19:30.32 or 15:19:30,32 depending on locale
    # (and there might be other variants as well)
    match = re.match("(\d+)\D*(\d+)\D*(\d+)\D*(\d+)", time_string.strip())
    hours, minutes, seconds, fraction = map(int, match.groups())
    result = hours * 3600 + minutes * 60 + seconds + fraction * 0.01
    if result < 0:
        # Handle test runs that go past midnight.
        result += 3600 * 24
    return result


print(
    "%1.2f seconds elapsed time"
    % (ParseTime(sys.argv[1]) - ParseTime(sys.argv[2]))
)