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# -*- coding: utf-8 -*-
#
# Copyright (C) 2007 Edgewall Software
# All rights reserved.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at http://babel.edgewall.org/wiki/License.
#
# This software consists of voluntary contributions made by many
# individuals. For the exact contribution history, see the revision
# history and logs, available at http://babel.edgewall.org/log/.
"""Writing of files in the ``gettext`` MO (machine object) format.
:since: version 0.9
:see: `The Format of MO Files
<http://www.gnu.org/software/gettext/manual/gettext.html#MO-Files>`_
"""
import array
import struct
__all__ = ['write_mo']
__docformat__ = 'restructuredtext en'
def write_mo(fileobj, catalog, use_fuzzy=False):
"""Write a catalog to the specified file-like object using the GNU MO file
format.
>>> from babel.messages import Catalog
>>> from gettext import GNUTranslations
>>> from StringIO import StringIO
>>> catalog = Catalog(locale='en_US')
>>> catalog.add('foo', 'Voh')
>>> catalog.add((u'bar', u'baz'), (u'Bahr', u'Batz'))
>>> catalog.add('fuz', 'Futz', flags=['fuzzy'])
>>> catalog.add('Fizz', '')
>>> catalog.add(('Fuzz', 'Fuzzes'), ('', ''))
>>> buf = StringIO()
>>> write_mo(buf, catalog)
>>> buf.seek(0)
>>> translations = GNUTranslations(fp=buf)
>>> translations.ugettext('foo')
u'Voh'
>>> translations.ungettext('bar', 'baz', 1)
u'Bahr'
>>> translations.ungettext('bar', 'baz', 2)
u'Batz'
>>> translations.ugettext('fuz')
u'fuz'
>>> translations.ugettext('Fizz')
u'Fizz'
>>> translations.ugettext('Fuzz')
u'Fuzz'
>>> translations.ugettext('Fuzzes')
u'Fuzzes'
:param fileobj: the file-like object to write to
:param catalog: the `Catalog` instance
:param use_fuzzy: whether translations marked as "fuzzy" should be included
in the output
"""
messages = list(catalog)
if not use_fuzzy:
messages[1:] = [m for m in messages[1:] if not m.fuzzy]
messages.sort()
ids = strs = ''
offsets = []
for message in messages:
# For each string, we need size and file offset. Each string is NUL
# terminated; the NUL does not count into the size.
if message.pluralizable:
msgid = '\x00'.join([
msgid.encode(catalog.charset) for msgid in message.id
])
msgstrs = []
for idx, string in enumerate(message.string):
if not string:
msgstrs.append(message.id[min(int(idx), 1)])
else:
msgstrs.append(string)
msgstr = '\x00'.join([
msgstr.encode(catalog.charset) for msgstr in msgstrs
])
else:
msgid = message.id.encode(catalog.charset)
if not message.string:
msgstr = message.id.encode(catalog.charset)
else:
msgstr = message.string.encode(catalog.charset)
offsets.append((len(ids), len(msgid), len(strs), len(msgstr)))
ids += msgid + '\x00'
strs += msgstr + '\x00'
# The header is 7 32-bit unsigned integers. We don't use hash tables, so
# the keys start right after the index tables.
keystart = 7 * 4 + 16 * len(messages)
valuestart = keystart + len(ids)
# The string table first has the list of keys, then the list of values.
# Each entry has first the size of the string, then the file offset.
koffsets = []
voffsets = []
for o1, l1, o2, l2 in offsets:
koffsets += [l1, o1 + keystart]
voffsets += [l2, o2 + valuestart]
offsets = koffsets + voffsets
fileobj.write(struct.pack('Iiiiiii',
0x950412deL, # magic
0, # version
len(messages), # number of entries
7 * 4, # start of key index
7 * 4 + len(messages) * 8, # start of value index
0, 0 # size and offset of hash table
) + array.array("i", offsets).tostring() + ids + strs)
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