"""
Python Character Mapping Codec for IBM273 alias CP273

Written by Michael Stroeder <michael@stroeder.com>.

$Id: cp273.py,v 1.3 2008/12/04 16:52:22 michael Exp $

License: Public domain without any warranty!

See also:
http://www.ietf.org/rfc/rfc1345.txt
"""

import codecs

### Codec APIs

class Codec(codecs.Codec):

    def encode(self,input,errors='strict'):
        return codecs.charmap_encode(input,errors,encoding_map)
        
    def decode(self,input,errors='strict'):
        return codecs.charmap_decode(input,errors,decoding_map)

class StreamWriter(Codec,codecs.StreamWriter):
    pass
        
class StreamReader(Codec,codecs.StreamReader):
    pass

### encodings module API

def getregentry():
    return codecs.CodecInfo(
        name='ibm273',
        encode=Codec().encode,
        decode=Codec().decode,
        streamreader=StreamReader,
        streamwriter=StreamWriter,
    )

def getaliases():
    return ('ibm273','cp273','cp_273')

def codec_search_function(encoding):
    if encoding in getaliases():
        return getregentry()
    return None


codecs.register(codec_search_function)


### Decoding Map

import copy,ebcdicatde

decoding_map = copy.copy(ebcdicatde.decoding_map)

decoding_map.update({
        0x0041: 0x00a0, # NO-BREAK SPACE
        0x0043: 0x007b, # LEFT CURLY BRACKET
        0x0044: 0x00e0, # LATIN SMALL LETTER A WITH GRAVE
        0x0045: 0x00e1, # LATIN SMALL LETTER A WITH ACUTE
        0x0046: 0x00e3, # LATIN SMALL LETTER A WITH TILDE
        0x0047: 0x00e5, # LATIN SMALL LETTER A WITH RING ABOVE
        0x0048: 0x00e7, # LATIN SMALL LETTER C WITH CEDILLA
        0x0049: 0x00f1, # LATIN SMALL LETTER N WITH TILDE

        0x0051: 0x00e9, # LATIN SMALL LETTER E WITH ACUTE
        0x0053: 0x00eb, # LATIN SMALL LETTER E WITH DIAERESIS
        0x0054: 0x00e8, # LATIN SMALL LETTER E WITH GRAVE
        0x0055: 0x00ed, # LATIN SMALL LETTER I WITH ACUTE
        0x0057: 0x00ef, # LATIN SMALL LETTER I WITH DIAERESIS
        0x0058: 0x00ec, # LATIN SMALL LETTER I WITH GRAVE
        0x0059: 0x007e, # TILDE

        0x0063: 0x005b, # LEFT SQUARE BRACKET
        0x0064: 0x00c0, # LATIN CAPITAL LETTER A WITH GRAVE
        0x0065: 0x00c1, # LATIN CAPITAL LETTER A WITH ACUTE
        0x0066: 0x00c3, # LATIN CAPITAL LETTER A WITH TILDE
        0x0067: 0x00c5, # LATIN CAPITAL LETTER A WITH RING ABOVE
        0x0068: 0x00c7, # LATIN CAPITAL LETTER C WITH CEDILLA
        0x0069: 0x00d1, # LATIN CAPITAL LETTER N WITH TILDE

        0x0071: 0x00c9, # LATIN CAPITAL LETTER E WITH ACUTE
        0x0073: 0x00cb, # LATIN CAPITAL LETTER E WITH DIAERESIS
        0x0074: 0x00c8, # LATIN CAPITAL LETTER E WITH GRAVE
        0x0075: 0x00cd, # LATIN CAPITAL LETTER I WITH ACUTE
        0x0077: 0x00cf, # LATIN CAPITAL LETTER I WITH DIAERESIS
        0x0078: 0x00cc, # LATIN CAPITAL LETTER I WITH GRAVE

        0x008a: 0x00ab, # LEFT-POINTING DOUBLE ANGLE QUOTATION MARK
        0x008c: 0x00f0, # LATIN SMALL LETTER ETH (Icelandic)
        0x008d: 0x00fd, # LATIN SMALL LETTER Y WITH ACUTE
        0x008e: 0x00fe, # LATIN SMALL LETTER THORN (Icelandic)
        0x008f: 0x00b1, # PLUS-MINUS SIGN
        0x0090: 0x00b0, # DEGREE SIGN

        0x009a: 0x00aa, # FEMININE ORDINAL INDICATOR
        0x009b: 0x00ba, # MASCULINE ORDINAL INDICATOR
        0x009c: 0x00e6, # LATIN SMALL LETTER AE
        0x009d: 0x00b8, # CEDILLA
        0x009e: 0x00c6, # LATIN CAPITAL LETTER AE
        0x009f: 0x00a4, # CURRENCY SIGN
        0x00a0: 0x00b5, # MICRO SIGN

        0x00aa: 0x00a1, # INVERTED EXCLAMATION MARK
        0x00ab: 0x00bf, # INVERTED QUESTION MARK
        0x00ac: 0x00d0, # LATIN CAPITAL LETTER ETH (Icelandic)
        0x00ad: 0x00dd, # LATIN CAPITAL LETTER Y WITH ACUTE
        0x00ae: 0x00de, # LATIN CAPITAL LETTER THORN (Icelandic)
        0x00af: 0x00ae, # REGISTERED SIGN
        0x00b0: 0x00a2, # CENT SIGN
        0x00b1: 0x00a3, # POUND SIGN
        0x00b2: 0x00a5, # YEN SIGN
        0x00b3: 0x00b7, # MIDDLE DOT
        0x00b4: 0x00a9, # COPYRIGHT SIGN
        0x00b5: 0x0040, # COMMERCIAL AT
        0x00b6: 0x00b6, # PILCROW SIGN
        0x00b7: 0x00bc, # VULGAR FRACTION ONE QUARTER
        0x00b8: 0x00bd, # VULGAR FRACTION ONE HALF
        0x00b9: 0x00be, # VULGAR FRACTION THREE QUARTERS
        0x00ba: 0x00ac, # NOT SIGN
        0x00bb: 0x007c, # VERTICAL LINE
        0x00bc: 0x203e, # OVERLINE
        0x00bd: 0x00a8, # DIAERESIS
        0x00be: 0x00b4, # ACUTE ACCENT
        0x00bf: 0x00d7, # MULTIPLICATION SIGN

        0x00ca: 0x00ad, # SOFT HYPHEN
        0x00cc: 0x00a6, # BROKEN BAR
        0x00cd: 0x00f2, # LATIN SMALL LETTER O WITH GRAVE
        0x00ce: 0x00f3, # LATIN SMALL LETTER O WITH ACUTE
        0x00cf: 0x00f5, # LATIN SMALL LETTER O WITH TILDE

        0x00da: 0x00b9, # SUPERSCRIPT ONE
        0x00dc: 0x007d, # RIGHT CURLY BRACKET
        0x00dd: 0x00f9, # LATIN SMALL LETTER U WITH GRAVE
        0x00de: 0x00fa, # LATIN SMALL LETTER U WITH ACUTE
        0x00df: 0x00ff, # LATIN SMALL LETTER Y WITH DIAERESIS

        0x00e1: 0x00f7, # DIVISION SIGN

        0x00ea: 0x00b2, # SUPERSCRIPT TWO
        0x00ed: 0x00d2, # LATIN CAPITAL LETTER O WITH GRAVE
        0x00ee: 0x00d3, # LATIN CAPITAL LETTER O WITH ACUTE
        0x00ef: 0x00d5, # LATIN CAPITAL LETTER O WITH TILDE

        0x00fa: 0x00b3, # SUPERSCRIPT THREE
        0x00fd: 0x00d9, # LATIN CAPITAL LETTER U WITH GRAVE
        0x00fe: 0x00da, # LATIN CAPITAL LETTER U WITH ACUTE
})

### Encoding Map

encoding_map = {}
for k,v in decoding_map.items():
    encoding_map[v] = k

codecs.register(getregentry)