""" Export .NET encodings as dict marshal

    Copyright (c) 2009, MAL

"""
import sys, codecs, marshal
import System
import System.Text

_debug = 0

CHECK_CODECS = [
    # (.NET Code page, Python codec name)
    (65000, 'utf-7'),
    (65001, 'utf-8'),
    #(65005, 'utf-32-le'), # not supported by .NET 2.0
    #(65006, 'utf-32-be'), # not supported by .NET 2.0
    (1200, 'utf-16-le'),
    (1201, 'utf-16-be'),
    (28591, 'iso-8859-1'),
    (28592, 'iso-8859-2'), # not supported by IronPython 2.6
    (28593, 'iso-8859-3'), # not supported by IronPython 2.6
    (28594, 'iso-8859-4'), # not supported by IronPython 2.6
    (28595, 'iso-8859-5'), # not supported by IronPython 2.6
    ]
UNICODE_RANGE = sys.maxunicode
    
def encoding_map(code_page, encoding):
    net_codec = System.Text.Encoding.GetEncoding(code_page)
    map = {}
    for i in range(UNICODE_RANGE):
        u = unichr(i)
        net_bytes = [int(c) for c in net_codec.GetBytes(u)]
        map[i] = net_bytes
    return map

for code_page, encoding in CHECK_CODECS:
    mapfile = encoding + '.map'
    print 'Exporting code Page %i as encoding %r using file %r' % (
        code_page, encoding, mapfile)
    d = encoding_map(code_page, encoding)
    data = (code_page, encoding, d)
    open(mapfile, 'wb').write(marshal.dumps(data))