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### jack_rc: read/write config file, a module for
### jack - extract audio from a CD and encode it using 3rd party software
### Copyright (C) 1999-2004 Arne Zellentin <zarne@users.sf.net>
### 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 2 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, write to the Free Software
### Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
import os
import sys
import string
import types
import jack_argv
import jack_version
from jack_globals import *
# exported functions:
# load
# save
def read(file):
read_rc = []
try:
f = open(file)
except:
return read_rc
lineno = 0
while 1:
x = f.readline()
if not x:
break
opt = val = com = None
lineno = lineno + 1
x = string.strip(x)
x = string.split(x, "#", 1)
if len(x) > 1:
opt, com = x
else:
opt = x[0]
if opt and com:
opt = string.strip(opt)
if opt:
x = string.split(opt, ":", 1)
if len(x) > 1:
opt, val = x
else:
opt = x[0]
else:
opt = None
read_rc.append([opt, val, com, lineno])
version = get_version(read_rc)
if version != jack_version.prog_rcversion:
warning("config file %s is of unknown version %s." % (file, `version`))
return read_rc
def get_version(rc):
if not rc:
return None
if len(rc[0]) != 4:
return None
opt, val, com, lineno = rc[0]
if opt == None and val == None and lineno == 1:
vers = com.strip().split(":", 1)
if len(vers) != 2:
return None
if vers[0] != "jackrc-version":
return None
ver = int(vers[1])
return ver
else:
return None
def load(cf, file):
rc = read(expand(file))
rc_cf = {}
for i in rc:
if i[0] != None:
if cf.has_key(i[0]):
ret, val = jack_argv.parse_option(cf, i[0:2], 0, i[0], None, origin="rcfile")
if ret != None:
rc_cf[i[0]] = {'val': val}
else:
warning(file + ":%s: " % i[3] + val)
else:
warning(file + ":%s: unknown option `%s'" % (i[3], i[0]))
return rc_cf
def merge(old, new):
old = old[:]
new = new[:]
append = []
remove = []
old.reverse()
for i in range(len(new)):
found = 0
for j in range(len(old)):
if new[i][0] and new[i][0] == old[j][0]:
old[j][:2] = new[i][:2]
found = 1
break
if not found:
append.append(new[i][:2] + [None,])
else:
if new[i][2] == 'toggle':
remove.append(old[j])
for i in remove:
if i[2] != None:
x = old.index(i)
old[x] = [None, None, old[x][2]]
else:
old.remove(i)
old.reverse()
return old + append
def write(file, rc, rcfile_exists = True):
f = open(file, "w")
if not rcfile_exists:
f.write("# jackrc-version:%d\n" % jack_version.prog_rcversion)
for i in rc:
if i[0]:
f.write(i[0])
if i[1] != None:
f.write(":" + i[1])
if i[2] != None:
if i[0] or i[1]:
f.write(" ")
f.write("#" + i[2])
f.write("\n")
def write_yes(x):
if x:
return "yes"
else:
return "no"
def convert(cf):
rc = []
for i in cf.keys():
if cf[i]['type'] == types.StringType:
rc.append([i, cf[i]['val'], None])
elif cf[i]['type'] == types.FloatType:
rc.append([i, `cf[i]['val']`, None])
elif cf[i]['type'] == types.IntType:
rc.append([i, `cf[i]['val']`, None])
elif cf[i]['type'] == 'toggle':
rc.append([i, write_yes(cf[i]['val']), 'toggle'])
elif cf[i]['type'] == types.ListType:
rc.append([i, `cf[i]['val']`, None])
else:
error("don't know how to handle " + `cf[i]['type']`)
return rc
def save(file, cf):
file = expand(file)
rc_cf = {}
for i in cf.keys():
if cf[i].has_key('save') and not cf[i]['save']:
continue
opt = cf[i]
if opt['history'][-1][0] == "argv":
rc_cf[i] = opt
oldrc = read(file)
argvrc = convert(rc_cf)
newrc = merge(oldrc, argvrc)
rcfile_exists = os.path.exists(file)
try:
write(file + ".tmp", newrc, rcfile_exists)
except:
error("can't write config file")
if os.path.exists(file):
os.rename(file, file + "~")
os.rename(file + ".tmp", file)
return len(rc_cf)
|
