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import os
import sys
import tempfile
import shutil
import subprocess
import time
import hashlib
import utils
from conf import conf
from conf import sf
import exceptions
import database
def __buildtempcnf__(variable_count, files, strlines):
""" Builds temporally file for cnf formulas
variable_count - number of variables in formulas
files - list of files with formulas
strlines - list of string lines with formulas"""
lines = set()
# Copy strlines
for ln in strlines:
lines.add(ln)
# Files
for file in files:
with open(file, 'r') as f:
for ln in f:
lines.add(ln.rstrip())
first_line = "p cnf " + str(variable_count) + " " + str(len(lines))
wfile = tempfile.NamedTemporaryFile(delete=False)
wfile.write(bytes(first_line + '\n', 'UTF-8'))
for ln in lines:
wfile.write(bytes(ln + ' 0\n', 'UTF-8'))
wfile.close()
return wfile.name
def __exec_sat__(file, args):
"""Executes SAT solver and returns configuration."""
picosat_cmd = [sf(conf.picosat), file]
picosat_cmd += conf.picosat_args
stdout = utils.callsubprocess('picosat', picosat_cmd, conf.picosat_output,
True, allowed_exit_codes = [10])
rtn = []
solut = []
for line in stdout:
if line[0] == 's':
try:
solut.remove(0)
rtn.append(solut)
except ValueError:
pass
solut = []
if not line.rstrip() == 's SATISFIABLE':
raise exceptions.NoSolution()
elif line[0] == 'v':
for sl in line[2:].split():
solut.append(int(sl))
try:
solut.remove(0)
rtn.append(solut)
except ValueError:
pass
return rtn
def __write_temp_config_file__(con):
# Ensure smap existence
utils.build_symbol_map()
# Load variable count
with open(sf(conf.variable_count_file)) as f:
f.readline()
var_num = int(f.readline())
# Write temporally file
wfile = tempfile.NamedTemporaryFile(delete=False)
for s in con:
if s < 0:
nt = True
s *= -1
else:
nt = False
if s > var_num:
break;
if 'NONAMEGEN' in utils.smap[s]: # ignore generated names
continue
wfile.write(bytes('CONFIG_' + utils.smap[s] + '=',
sys.getdefaultencoding()))
if not nt:
wfile.write(bytes('y', sys.getdefaultencoding()))
else:
wfile.write(bytes('n', sys.getdefaultencoding()))
wfile.write(bytes('\n', sys.getdefaultencoding()))
wfile.close()
return wfile.name
def __load_config_file__(file):
rtn = dict()
with open(file, 'r') as f:
for ln in f:
if ln[0] == '#' or not '=' in ln:
continue
indx = ln.index('=')
if (ln[indx + 1] == 'y'):
rtn[ln[7:indx]] = True
else:
rtn[ln[7:indx]] = True
return rtn
def __calchash__(file):
"""Calculates hash from configuration file"""
# Build hashconfigsort
csort = []
try:
with open(conf.hashconfigsort, 'r') as f:
for ln in f:
csort.append(ln.rstrip())
except FileNotFoundError:
pass
con = __load_config_file__(file)
cstr = ""
for c in csort:
try:
if con[c]:
cstr += '+'
else:
cstr += '-'
except ValueError:
cstr += '0'
# Add missing
csortfile = open(sf(conf.hashconfigsort), 'a');
for key, val in con.items():
try:
csort.index(key)
except ValueError:
indx = len(csort)
csort.append(key)
csortfile.write(key + '\n')
if val:
cstr += '+'
else:
cstr += '-'
csortfile.close()
hsh = hashlib.md5(bytes(cstr, 'UTF-8'))
return hsh.hexdigest()
def __register_conf__(con):
dtb = database.database()
# Solution to configuration
wfile = __write_temp_config_file__(con)
hsh = __calchash__(wfile)
filen = os.path.join(sf(conf.configurations_folder), hsh)
hshf = hsh
if os.path.isfile(filen):
if compare(filen, wfile):
print("I: Generated existing configuration.")
else:
print("W: Generated configuration with collision hash.")
# TODO this might have to be tweaked
raise Exception()
shutil.move(wfile, filen)
dtb.add_configuration(hsh, hshf)
def generate():
"""Collect boolean equations from files rules and required
And get solution with picosat
"""
# Check if rules_file exist. If it was generated.
if not os.path.isfile(sf(conf.rules_file)):
raise exceptions.MissingFile(conf.rules_file,"Run parse_kconfig.")
if not os.path.isfile(sf(conf.required_file)):
raise exceptions.MissingFile(conf.required_file,"Run allconfig.")
# Load variable clount
with open(sf(conf.variable_count_file)) as f:
var_num = f.readline()
tfile = __buildtempcnf__(var_num, (sf(conf.rules_file), sf(conf.required_file)), ())
try:
confs = __exec_sat__(tfile, [])
os.remove(tfile)
for con in confs:
__register_conf__(con)
except exceptions.NoSolution:
os.remove(tfile)
raise exceptions.NoSolution()
def compare(file1, file2):
"""Compared two configuration"""
conf1 = __load_config_file__(file1)
conf2 = __load_config_file__(file2)
# This is not exactly best comparison method
for key, val in conf1.items():
try:
if conf2[key] != val:
return False
except ValueError:
return False
for key, val in conf2.items():
try:
if conf1[key] != val:
return False
except ValueError:
return False
return True
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