Generate binary message catalog from textual translation description，generatetextual,'''PYTHON SO

Generate binary message catalog from textual translation description，generatetextual,'''PYTHON SO

'''PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2--------------------------------------------1. This LICENSE AGREEMENT is between the Python Software Foundation('PSF'), and the Individual or Organization ('Licensee') accessing andotherwise using this software ('Python') in source or binary form andits associated documentation.2. Subject to the terms and conditions of this License Agreement, PSFhereby grants Licensee a nonexclusive, royalty-free, world-widelicense to reproduce, analyze, test, perform and/or display publicly,prepare derivative works, distribute, and otherwise use Pythonalone or in any derivative version, provided, however, that PSF'sLicense Agreement and PSF's notice of copyright, i.e., 'Copyright (c)2001, 2002, 2003, 2004 Python Software Foundation; All Rights Reserved'are retained in Python alone or in any derivative version preparedby Licensee.3. In the event Licensee prepares a derivative work that is based onor incorporates Python or any part thereof, and wants to makethe derivative work available to others as provided herein, thenLicensee hereby agrees to include in any such work a brief summary ofthe changes made to Python.4. PSF is making Python available to Licensee on an 'AS IS'basis.  PSF MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS ORIMPLIED.  BY WAY OF EXAMPLE, BUT NOT LIMITATION, PSF MAKES NO ANDDISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESSFOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON WILL NOTINFRINGE ANY THIRD PARTY RIGHTS.5. PSF SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHONFOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS ASA RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON,OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.6. This License Agreement will automatically terminate upon a materialbreach of its terms and conditions.7. Nothing in this License Agreement shall be deemed to create anyrelationship of agency, partnership, or joint venture between PSF andLicensee.  This License Agreement does not grant permission to use PSFtrademarks or trade name in a trademark sense to endorse or promoteproducts or services of Licensee, or any third party.8. By copying, installing or otherwise using Python, Licenseeagrees to be bound by the terms and conditions of this LicenseAgreement.'''#! /usr/bin/env python# -*- coding: iso-8859-1 -*-# Written by Martin v. Lis <loewis@informatik.hu-berlin.de>'''Generate binary message catalog from textual translation description.This program converts a textual Uniforum-style message catalog (.po file) intoa binary GNU catalog (.mo file).  This is essentially the same function as theGNU msgfmt program, however, it is a simpler implementation.Usage: msgfmt.py [OPTIONS] filename.poOptions:    -o file    --output-file=file        Specify the output file to write to.  If omitted, output will go to a        file named filename.mo (based off the input file name).    -h    --help        Print this message and exit.    -V    --version        Display version information and exit.'''import sysimport osimport getoptimport structimport array__version__ = '1.1'MESSAGES = {}def usage(code, msg=''):    print >> sys.stderr, __doc__    if msg:        print >> sys.stderr, msg    sys.exit(code)def add(id, str, fuzzy):    'Add a non-fuzzy translation to the dictionary.'    global MESSAGES    if not fuzzy and str:        MESSAGES[id] = strdef 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 outputdef 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    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, msgdef 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, 'msgfmt.py', __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()