211 lines
7.0 KiB
Python
211 lines
7.0 KiB
Python
# -*- coding: utf-8 -*-
|
|
"""
|
|
babel.messages.mofile
|
|
~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
Writing of files in the ``gettext`` MO (machine object) format.
|
|
|
|
:copyright: (c) 2013-2021 by the Babel Team.
|
|
:license: BSD, see LICENSE for more details.
|
|
"""
|
|
|
|
import array
|
|
import struct
|
|
|
|
from babel.messages.catalog import Catalog, Message
|
|
from babel._compat import range_type, array_tobytes
|
|
|
|
|
|
LE_MAGIC = 0x950412de
|
|
BE_MAGIC = 0xde120495
|
|
|
|
|
|
def read_mo(fileobj):
|
|
"""Read a binary MO file from the given file-like object and return a
|
|
corresponding `Catalog` object.
|
|
|
|
:param fileobj: the file-like object to read the MO file from
|
|
|
|
:note: The implementation of this function is heavily based on the
|
|
``GNUTranslations._parse`` method of the ``gettext`` module in the
|
|
standard library.
|
|
"""
|
|
catalog = Catalog()
|
|
headers = {}
|
|
|
|
filename = getattr(fileobj, 'name', '')
|
|
|
|
buf = fileobj.read()
|
|
buflen = len(buf)
|
|
unpack = struct.unpack
|
|
|
|
# Parse the .mo file header, which consists of 5 little endian 32
|
|
# bit words.
|
|
magic = unpack('<I', buf[:4])[0] # Are we big endian or little endian?
|
|
if magic == LE_MAGIC:
|
|
version, msgcount, origidx, transidx = unpack('<4I', buf[4:20])
|
|
ii = '<II'
|
|
elif magic == BE_MAGIC:
|
|
version, msgcount, origidx, transidx = unpack('>4I', buf[4:20])
|
|
ii = '>II'
|
|
else:
|
|
raise IOError(0, 'Bad magic number', filename)
|
|
|
|
# Now put all messages from the .mo file buffer into the catalog
|
|
# dictionary
|
|
for i in range_type(0, msgcount):
|
|
mlen, moff = unpack(ii, buf[origidx:origidx + 8])
|
|
mend = moff + mlen
|
|
tlen, toff = unpack(ii, buf[transidx:transidx + 8])
|
|
tend = toff + tlen
|
|
if mend < buflen and tend < buflen:
|
|
msg = buf[moff:mend]
|
|
tmsg = buf[toff:tend]
|
|
else:
|
|
raise IOError(0, 'File is corrupt', filename)
|
|
|
|
# See if we're looking at GNU .mo conventions for metadata
|
|
if mlen == 0:
|
|
# Catalog description
|
|
lastkey = key = None
|
|
for item in tmsg.splitlines():
|
|
item = item.strip()
|
|
if not item:
|
|
continue
|
|
if b':' in item:
|
|
key, value = item.split(b':', 1)
|
|
lastkey = key = key.strip().lower()
|
|
headers[key] = value.strip()
|
|
elif lastkey:
|
|
headers[lastkey] += b'\n' + item
|
|
|
|
if b'\x04' in msg: # context
|
|
ctxt, msg = msg.split(b'\x04')
|
|
else:
|
|
ctxt = None
|
|
|
|
if b'\x00' in msg: # plural forms
|
|
msg = msg.split(b'\x00')
|
|
tmsg = tmsg.split(b'\x00')
|
|
if catalog.charset:
|
|
msg = [x.decode(catalog.charset) for x in msg]
|
|
tmsg = [x.decode(catalog.charset) for x in tmsg]
|
|
else:
|
|
if catalog.charset:
|
|
msg = msg.decode(catalog.charset)
|
|
tmsg = tmsg.decode(catalog.charset)
|
|
catalog[msg] = Message(msg, tmsg, context=ctxt)
|
|
|
|
# advance to next entry in the seek tables
|
|
origidx += 8
|
|
transidx += 8
|
|
|
|
catalog.mime_headers = headers.items()
|
|
return catalog
|
|
|
|
|
|
def write_mo(fileobj, catalog, use_fuzzy=False):
|
|
"""Write a catalog to the specified file-like object using the GNU MO file
|
|
format.
|
|
|
|
>>> import sys
|
|
>>> from babel.messages import Catalog
|
|
>>> from gettext import GNUTranslations
|
|
>>> from babel._compat import BytesIO
|
|
|
|
>>> catalog = Catalog(locale='en_US')
|
|
>>> catalog.add('foo', 'Voh')
|
|
<Message ...>
|
|
>>> catalog.add((u'bar', u'baz'), (u'Bahr', u'Batz'))
|
|
<Message ...>
|
|
>>> catalog.add('fuz', 'Futz', flags=['fuzzy'])
|
|
<Message ...>
|
|
>>> catalog.add('Fizz', '')
|
|
<Message ...>
|
|
>>> catalog.add(('Fuzz', 'Fuzzes'), ('', ''))
|
|
<Message ...>
|
|
>>> buf = BytesIO()
|
|
|
|
>>> write_mo(buf, catalog)
|
|
>>> x = buf.seek(0)
|
|
>>> translations = GNUTranslations(fp=buf)
|
|
>>> if sys.version_info[0] >= 3:
|
|
... translations.ugettext = translations.gettext
|
|
... translations.ungettext = translations.ngettext
|
|
>>> 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)
|
|
messages[1:] = [m for m in messages[1:]
|
|
if m.string and (use_fuzzy or not m.fuzzy)]
|
|
messages.sort()
|
|
|
|
ids = strs = b''
|
|
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 = b'\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 = b'\x00'.join([
|
|
msgstr.encode(catalog.charset) for msgstr in msgstrs
|
|
])
|
|
else:
|
|
msgid = message.id.encode(catalog.charset)
|
|
msgstr = message.string.encode(catalog.charset)
|
|
if message.context:
|
|
msgid = b'\x04'.join([message.context.encode(catalog.charset),
|
|
msgid])
|
|
offsets.append((len(ids), len(msgid), len(strs), len(msgstr)))
|
|
ids += msgid + b'\x00'
|
|
strs += msgstr + b'\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',
|
|
LE_MAGIC, # 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_tobytes(array.array("i", offsets)) + ids + strs)
|