Function codegen

Tools/unicode/gencodec.py:253–356

Returns Python source for the given map. Comments are included in the source, if comments is true (default).

(name, map, encodingname, comments=1)

    return l

def codegen(name, map, encodingname, comments=1):

    """ Returns Python source for the given map.

        Comments are included in the source, if comments is true (default).

    """
    # Generate code
    decoding_map_code = python_mapdef_code(
        'decoding_map',
        map,
        comments=comments)
    decoding_table_code = python_tabledef_code(
        'decoding_table',
        map,
        comments=comments)
    encoding_map_code = python_mapdef_code(
        'encoding_map',
        codecs.make_encoding_map(map),
        comments=comments,
        precisions=(4, 2))

    if decoding_table_code:
        suffix = 'table'
    else:
        suffix = 'map'

    l = [
        '''\
""" Python Character Mapping Codec %s generated from '%s' with gencodec.py.

"""#"

import codecs

### Codec APIs

class Codec(codecs.Codec):

    def encode(self, input, errors='strict'):
        return codecs.charmap_encode(input, errors, encoding_%s)

    def decode(self, input, errors='strict'):
        return codecs.charmap_decode(input, errors, decoding_%s)
''' % (encodingname, name, suffix, suffix)]
    l.append('''\
class IncrementalEncoder(codecs.IncrementalEncoder):
    def encode(self, input, final=False):
        return codecs.charmap_encode(input, self.errors, encoding_%s)[0]

class IncrementalDecoder(codecs.IncrementalDecoder):
    def decode(self, input, final=False):
        return codecs.charmap_decode(input, self.errors, decoding_%s)[0]''' %
        (suffix, suffix))

    l.append('''
class StreamWriter(Codec, codecs.StreamWriter):
    pass