Source code for kiwi.i18n.msgfmt

#! /usr/bin/env python
# -*- coding: iso-8859-1 -*-
# Written by Martin v. Löwis <>

doc = """Generate binary message catalog from textual translation description.

This program converts a textual Uniforum-style message catalog (.po file) into
a binary GNU catalog (.mo file).  This is essentially the same function as the
GNU msgfmt program, however, it is a simpler implementation.

Usage: [OPTIONS] filename.po

    -o file
        Specify the output file to write to.  If omitted, output will go to a
        file named (based off the input file name).

        Print this message and exit.

        Display version information and exit.

import sys
import os
import getopt
import struct
import array

__version__ = "1.1"


[docs]def usage(code, msg=''): print >> sys.stderr, doc if msg: print >> sys.stderr, msg sys.exit(code)
[docs]def add(id, str, fuzzy): "Add a non-fuzzy translation to the dictionary." global MESSAGES if not fuzzy and str: MESSAGES[id] = str
[docs]def generate(): "Return the generated output." global MESSAGES keys = MESSAGES.keys() # the keys are sorted in the .mo file keys.sort() offsets = [] ids = strs = '' for id in keys: # For each string, we need size and file offset. Each string is NUL # terminated; the NUL does not count into the size. offsets.append((len(ids), len(id), len(strs), len(MESSAGES[id]))) ids += id + '\0' strs += MESSAGES[id] + '\0' output = '' # The header is 7 32-bit unsigned integers. We don't use hash tables, so # the keys start right after the index tables. # translated string. keystart = 7*4+16*len(keys) # and the values start after the keys valuestart = keystart + len(ids) koffsets = [] voffsets = [] # 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. for o1, l1, o2, l2 in offsets: koffsets += [l1, o1+keystart] voffsets += [l2, o2+valuestart] offsets = koffsets + voffsets output = struct.pack("Iiiiiii", 0x950412deL, # Magic 0, # Version len(keys), # # of entries 7*4, # start of key index 7*4+len(keys)*8, # start of value index 0, 0) # size and offset of hash table output += array.array("i", offsets).tostring() output += ids output += strs return output
[docs]def make(filename, outfile): ID = 1 STR = 2 # Compute .mo name from .po name and arguments if filename.endswith('.po'): infile = filename else: infile = filename + '.po' if outfile is None: outfile = os.path.splitext(infile)[0] + '.mo' try: lines = open(infile).readlines() except IOError, msg: print >> sys.stderr, msg sys.exit(1) section = None fuzzy = 0 # Parse the catalog lno = 0 msgid = msgstr = '' for l in lines: lno += 1 # If we get a comment line after a msgstr, this is a new entry if l[0] == '#' and section == STR: add(msgid, msgstr, fuzzy) section = None fuzzy = 0 # Record a fuzzy mark if l[:2] == '#,' and l.find('fuzzy'): fuzzy = 1 # Skip comments if l[0] == '#': continue # Now we are in a msgid section, output previous section if l.startswith('msgid'): if section == STR: add(msgid, msgstr, fuzzy) section = ID l = l[5:] msgid = msgstr = '' # Now we are in a msgstr section elif l.startswith('msgstr'): section = STR l = l[6:] # Skip empty lines l = l.strip() if not l: continue # XXX: Does this always follow Python escape semantics? l = eval(l) if section == ID: msgid += l elif section == STR: msgstr += l else: print >> sys.stderr, 'Syntax error on %s:%d' % (infile, lno), \ 'before:' print >> sys.stderr, l sys.exit(1) # Add last entry if section == STR: add(msgid, msgstr, fuzzy) # Compute output output = generate() try: open(outfile,"wb").write(output) except IOError,msg: print >> sys.stderr, msg
[docs]def main(): try: opts, args = getopt.getopt(sys.argv[1:], 'hVo:', ['help', 'version', 'output-file=']) except getopt.error, msg: usage(1, msg) outfile = None # parse options for opt, arg in opts: if opt in ('-h', '--help'): usage(0) elif opt in ('-V', '--version'): print >> sys.stderr, "", __version__ sys.exit(0) elif opt in ('-o', '--output-file'): outfile = arg # do it if not args: print >> sys.stderr, 'No input file given' print >> sys.stderr, "Try `msgfmt --help' for more information." return for filename in args: make(filename, outfile)
if __name__ == '__main__': main()