Synnefo

# Copyright 2012 GRNET S.A. All rights reserved.

#

# Redistribution and use in source and binary forms, with or

# without modification, are permitted provided that the following

# conditions are met:

#

#   1. Redistributions of source code must retain the above

#      copyright notice, this list of conditions and the following

#      disclaimer.

#

#   2. Redistributions in binary form must reproduce the above

#      copyright notice, this list of conditions and the following

#      disclaimer in the documentation and/or other materials

#      provided with the distribution.

#

# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

# POSSIBILITY OF SUCH DAMAGE.

#

# The views and conclusions contained in the software and

# documentation are those of the authors and should not be

# interpreted as representing official policies, either expressed

# or implied, of GRNET S.A.

import datetime

def split_time(value):

  """Splits time as floating point number into a tuple.

  @param value: Time in seconds

  @type value: int or float

  @return: Tuple containing (seconds, microseconds)

  """

  (seconds, microseconds) = divmod(int(value * 1000000), 1000000)

  assert 0 <= seconds, \

    "Seconds must be larger than or equal to 0, but are %s" % seconds

  assert 0 <= microseconds <= 999999, \

    "Microseconds must be 0-999999, but are %s" % microseconds

  return (int(seconds), int(microseconds))

def merge_time(timetuple):

  """Merges a tuple into a datetime object

  @param timetuple: Time as tuple, (seconds, microseconds)

  @type timetuple: tuple

  @return: Time as a datetime object

  """

  (seconds, microseconds) = timetuple

  assert 0 <= seconds, \

    "Seconds must be larger than or equal to 0, but are %s" % seconds

  assert 0 <= microseconds <= 999999, \

    "Microseconds must be 0-999999, but are %s" % microseconds

  t1 = float(seconds) + (float(microseconds) * 0.000001)

  return datetime.datetime.fromtimestamp(t1)