Files
liberasurecode/tools/gen_failure_combs.py
2014-06-11 16:07:04 -07:00

66 lines
2.3 KiB
Python

# Copyright (c) 2013, Kevin Greenan (kmgreen2@gmail.com)
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
#
# 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDER 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.
import optparse
import mpmath
import itertools
import sys
import random
def get_combinations(list, k):
return itertools.combinations(list, k)
if len(sys.argv) != 3:
print("Usage: %s <num_fragments> <num_combs>")
sys.exit(1)
n = int(sys.argv[1])
k = int(sys.argv[2])
if n is None or k is None:
print("Usage: %s <num_fragments> <num_combs>")
sys.exit(1)
fragments = [i for i in range(n)]
fragment_combinations = []
for i in range(1, k + 1):
fragment_combinations.extend(
[list(comb) for comb in get_combinations(fragments, i)])
for comb in fragment_combinations:
while len(comb) < 4:
comb.append(-1)
failure_comb_format_str = \
"int failure_combs_%d_%d[NUM_%d_%d_COMBS][%d] = %s ;"
fragment_combination_str = (
"%s" % fragment_combinations).replace("[", "{").replace("]", "}")
print("#define NUM_%d_%d_COMBS %d" %
(n, k + 1, len(fragment_combinations)))
print(failure_comb_format_str %
(n, k + 1, n, k + 1, 4, fragment_combination_str))