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# Copyright 2011 Lars Wirzenius
#
# 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/>.
import os
class NameGenerator(object):
'''Generate names for new output files.'''
def __init__(self, dirname):
self.dirname = dirname
self.counter = 0
def _next_candidate_name(self):
self.counter += 1
return os.path.join(self.dirname, 'file%d' % self.counter)
def new(self):
while True:
name = self._next_candidate_name()
if not os.path.exists(name):
return name
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