""" Check .NET encoding encoding_maps exported using export-encodings.py

    Copyright (c) 2009, MAL

"""
import sys, codecs, marshal, glob

_debug = 0

UNICODE_RANGE = sys.maxunicode
    
def check_encoding_encoding_map(code_page, encoding, encoding_map):
    errors = 0
    try:
        python_encoder = codecs.getencoder(encoding)
    except LookupError:
        print 'Unknown encoding in Python: %r' % encoding
        raise
    for i in range(UNICODE_RANGE):
        u = unichr(i)
        try:
            python_bytes, count = python_encoder(u)
        except ValueError:
            if _debug > 1: print '%i: skipped (Python encode error)' % i
            continue
        python_bytes = [ord(x) for x in python_bytes]
        net_bytes = encoding_map[i]
        if python_bytes == net_bytes:
            if _debug > 1: print '%i: OK' % i
        else:
            if _debug: print '%i: .NET=%r, Python=%r' % (
                i, net_bytes, python_bytes)
            errors += 1
    return errors

for pattern in sys.argv[1:]:
    for mapfile in glob.glob(pattern):
        data = marshal.loads(open(mapfile, 'rb').read())
        code_page, encoding, encoding_map = data
        print 'Checking code Page %i against encoding %r using file %r' % (
            code_page, encoding, mapfile)
        errors = check_encoding_encoding_map(code_page, encoding, encoding_map)
        print
        print '%i errors' % errors
        print