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# Copyright (C) 2005 Aaron Bentley and Panometrics, Inc.
# <abentley@panoramicfeedback.com>
#
# 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.path
import errno
import utility
class IllegalKey(Exception):
def __init__(self, key):
Exception.__init__(self, 'Illegal key "%s"' % key)
self.key = key
class IllegalValue(Exception):
def __init__(self, value):
Exception.__init__(self, 'Illegal value "%s"' % value)
self.value = value
def generate(f, map, context=3):
"""Generate a format-2 mapfile. This is a simpler format, but should merge
better, because there's no chance of confusion for appends, and lines
are unique for both key and value.
>>> f = utility.FileString()
>>> generate(f, {"q":"p"})
>>> f.str
'\\n\\n\\nq=p\\n\\n\\n\\n'
>>> generate(f, {"q=":"p"})
Traceback (most recent call last):
IllegalKey: Illegal key "q="
>>> generate(f, {"q\\n":"p"})
Traceback (most recent call last):
IllegalKey: Illegal key "q\\n"
>>> generate(f, {"":"p"})
Traceback (most recent call last):
IllegalKey: Illegal key ""
>>> generate(f, {">q":"p"})
Traceback (most recent call last):
IllegalKey: Illegal key ">q"
>>> generate(f, {"q":"p\\n"})
Traceback (most recent call last):
IllegalValue: Illegal value "p\\n"
"""
assert(context > 0)
keys = map.keys()
keys.sort()
for key in keys:
try:
assert not key.startswith('>')
assert('\n' not in key)
assert('=' not in key)
assert(len(key) > 0)
except AssertionError:
raise IllegalKey(key.encode('string_escape'))
if "\n" in map[key]:
raise IllegalValue(map[key].encode('string_escape'))
for key in keys:
for i in range(context):
f.write("\n")
f.write("%s=%s\n" % (key.encode("utf-8"), map[key].encode("utf-8")))
for i in range(context):
f.write("\n")
def parse(f):
"""
Parse a format-2 mapfile.
>>> parse('\\n\\n\\nq=p\\n\\n\\n\\n')['q']
u'p'
>>> parse('\\n\\nq=\\'p\\'\\n\\n\\n\\n')['q']
u"\'p\'"
>>> f = utility.FileString()
>>> generate(f, {"a":"b", "c":"d", "e":"f"})
>>> dict = parse(f)
>>> dict["a"]
u'b'
>>> dict["c"]
u'd'
>>> dict["e"]
u'f'
"""
f = utility.get_file(f)
result = {}
for line in f:
line = line.rstrip('\n')
if len(line) == 0:
continue
name,value = [f.decode('utf-8') for f in line.split('=', 1)]
assert not result.has_key('name')
result[name] = value
return result
def map_save(rcs, path, map):
"""Save the map as a mapfile to the specified path"""
add = not os.path.exists(path)
output = file(path, "wb")
generate(output, map)
if add:
rcs.add_id(path)
class NoSuchFile(Exception):
def __init__(self, pathname):
Exception.__init__(self, "No such file: %s" % pathname)
def map_load(path):
try:
return parse(file(path, "rb"))
except IOError, e:
if e.errno != errno.ENOENT:
raise e
raise NoSuchFile(path)
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