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# GNU Solfege - free ear training software
# Copyright (C) 2000, 2001, 2002, 2003, 2004, 2007, 2008 Tom Cato Amundsen
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
>>> d1=Duration(4, 0, Rat(1, 1))
>>> d2=Duration(4, 1, Rat(1, 1))
>>> d1==d2
False
>>> d1.get_rat_value()
(Rat 1/4)
>>> d2.get_rat_value()
(Rat 3/8)
>>> d3=Duration(4, 2, Rat(2, 3))
>>> d3.get_rat_value()
(Rat 7/24)
"""
from rat import Rat
class Duration:
def __init__(self, nh, dots, tuple=Rat(1, 1)):
self.m_nh = nh
self.m_dots = dots
self.m_tuple = tuple
def __cmp__(self, B):
"""
>>> A=Duration(4, 1, Rat(1, 1))
>>> B=Duration(4, 1, Rat(1, 1))
>>> C=Duration(2, 2, Rat(4, 7))
>>> A==None, A==B, A==C
(False, True, False)
>>> (cmp(A, C), cmp(A, B))
(-1, 0)
"""
if not B:
return -1
return cmp(self.get_rat_value(), B.get_rat_value())
def get_rat_value(self):
"""
>>> A=Duration(4, 1, Rat(1, 1))
>>> B=Duration(4, 2, Rat(3, 5))
>>> A.get_rat_value(), B.get_rat_value()
((Rat 3/8), (Rat 21/80))
"""
d = Rat(1, self.m_nh)
if self.m_dots > 0:
d = d + Rat(1, self.m_nh * 2)
if self.m_dots > 1:
d = d + Rat(1, self.m_nh * 4)
return d * self.m_tuple
def clone(self):
return Duration(self.m_nh, self.m_dots, self.m_tuple)
def __str__(self):
return "(Duration:%s:%idot:%s)" % (self.m_nh, self.m_dots, self.m_tuple)
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