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#Copyright (c) 2014, Joseph Hunkeler <jhunkeler at 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:
#
#1. Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
#2. 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 OWNER 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 os
import sexparse
__all__ = ['SexParam']
class SexParam(sexparse.SexConfigBase):
def __init__(self, filename):
super(SexParam, self).__init__(filename)
self.status = []
self.lparenthesis = '('
self.rparenthesis = ')'
self.read()
def is_enabled(self, key):
for status, keyword in zip(self.status, self.pairs.iterkeys()):
if key == keyword:
return status
def enable(self, key, state):
status_new = []
mapping = zip(self.status, self.pairs.iterkeys())
for status, keyword in mapping:
if key == keyword:
status = state
status_new.append(status)
self.status = status_new
def align_values(self):
pass
def read(self):
for index, line in enumerate(open(self.filename)):
open_position = line.find(self.lparenthesis)
close_position = line.find(self.rparenthesis)
key = line[0:open_position]
# empty lines don't matter to us
if not key:
continue
# how about that syntax? did anyone screw up the file?
if " " in key or "," in key:
raise SyntaxError('{}:{}:malformed key\n{}'.format(self.filename, index+1, line))
if open_position != -1 or close_position != -1:
# we found a so-called valid item
item = line[open_position+1:close_position]
# we need to take a close look.
if open_position < 0 or close_position < 0:
raise SyntaxError('{}:{}:malformed input item\n{}'.format(self.filename, index+1, line))
else:
# legitimately found nothing
item = ''
# strip comments for dictionary key values but keep track of them
if key.startswith(self.comment):
key = key.lstrip(self.comment)
self.status.append(False)
else:
self.status.append(True)
self.pairs[key] = item
def write(self, filename=None):
if filename is None:
filename = self.filename
outfile = open(filename, 'w+')
for key, item in self.pairs.iteritems():
if not self.is_enabled(key):
key = self.comment + key
if item:
item = self.lparenthesis + str(item) + self.rparenthesis
outfile.write("{}{}{}".format(key, item, os.linesep))
outfile.close()
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