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satisfiability/python/automerge.py
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#! /usr/bin/env python | |
import os, sys | |
# GPLv3 | |
# lut file is tab separated key:value list | |
# (value could be inferred from order, but why chance it) | |
# could be more paranoid, assumes input luts are well formed | |
# todo: preserve comments across merges | |
if len(sys.argv) < 4: | |
print('automerge.py output in1 in2 ...') | |
sys.exit(2) | |
out_cnf = sys.argv[1] + '.cnf' | |
out_lut = sys.argv[1] + '.lut' | |
if os.path.isfile(out_cnf): | |
print('%s already exists' % out_cnf) | |
sys.exit(1) | |
if os.path.isfile(out_lut): | |
print('%s already exists' % out_lut) | |
sys.exit(1) | |
def load_lut(path): | |
lut = {} | |
for line in open(path): | |
line = line.strip() | |
if line.startswith('#'): | |
continue | |
k,v = line.split('\t') | |
lut[k] = v | |
return lut | |
def sorted_keys(lut): | |
return [vk[1] for vk in sorted((v,k) for k,v in in_lut.items())] | |
new_cnf = open(out_cnf, 'w') | |
tmp_lut = {} | |
for in_name in sys.argv[2:]: | |
# load lut | |
in_lut = load_lut(in_name + '.lut') | |
translate = {} | |
for k in sorted_keys(in_lut): | |
if k not in new_lut: | |
tmp_lut[k] = len(tmp_lut) + 1 | |
translate[in_lut[k]] = tmp_lut[k] | |
# update cnf | |
new_cnf.write('c automerge %s\n' % in_name) | |
for line in open(in_name + '.cnf'): | |
if line.startswith('c'): | |
new_cnf.write(line) | |
continue | |
clause = map(int, line.strip().split()) | |
new_clause = [] | |
for term in clause: | |
sign = term / abs(term) | |
new_clause.append(sign * translate[abs(term)]) | |
new_cnf.write(' '.join(map(str, new_clause)) + ' 0\n') | |
new_cnf.close() | |
new_lut = open(out_lut, 'w') | |
for k in sorted_keys(tmp_lut): | |
new_lut.write('%i\t%i\n' % (k, tmp_lut[k])) | |
new_lut.close() | |