Issue #14874: Restore charmap decoding speed to pre-PEP 393 levels.

Patch by Serhiy Storchaka.

1 files changed, 269 insertions, 108 deletions

diff --git a/Lib/encodings/hp_roman8.py b/Lib/encodings/hp_roman8.py
index dbaaa72..a93523e 100644
--- a/Lib/encodings/hp_roman8.py
+++ b/Lib/encodings/hp_roman8.py
@@ -14,18 +14,18 @@ import codecs
 class Codec(codecs.Codec):
 
     def encode(self,input,errors='strict'):
-        return codecs.charmap_encode(input,errors,encoding_map)
+        return codecs.charmap_encode(input,errors,encoding_table)
 
     def decode(self,input,errors='strict'):
-        return codecs.charmap_decode(input,errors,decoding_map)
+        return codecs.charmap_decode(input,errors,decoding_table)
 
 class IncrementalEncoder(codecs.IncrementalEncoder):
     def encode(self, input, final=False):
-        return codecs.charmap_encode(input,self.errors,encoding_map)[0]
+        return codecs.charmap_encode(input,self.errors,encoding_table)[0]
 
 class IncrementalDecoder(codecs.IncrementalDecoder):
     def decode(self, input, final=False):
-        return codecs.charmap_decode(input,self.errors,decoding_map)[0]
+        return codecs.charmap_decode(input,self.errors,decoding_table)[0]
 
 class StreamWriter(Codec,codecs.StreamWriter):
     pass
@@ -46,107 +46,268 @@ def getregentry():
         streamreader=StreamReader,
     )
 
-### Decoding Map
-
-decoding_map = codecs.make_identity_dict(range(256))
-decoding_map.update({
-        0x00a1: 0x00c0, #       LATIN CAPITAL LETTER A WITH GRAVE
-        0x00a2: 0x00c2, #       LATIN CAPITAL LETTER A WITH CIRCUMFLEX
-        0x00a3: 0x00c8, #       LATIN CAPITAL LETTER E WITH GRAVE
-        0x00a4: 0x00ca, #       LATIN CAPITAL LETTER E WITH CIRCUMFLEX
-        0x00a5: 0x00cb, #       LATIN CAPITAL LETTER E WITH DIAERESIS
-        0x00a6: 0x00ce, #       LATIN CAPITAL LETTER I WITH CIRCUMFLEX
-        0x00a7: 0x00cf, #       LATIN CAPITAL LETTER I WITH DIAERESIS
-        0x00a8: 0x00b4, #       ACUTE ACCENT
-        0x00a9: 0x02cb, #       MODIFIER LETTER GRAVE ACCENT (Mandarin Chinese fourth tone)
-        0x00aa: 0x02c6, #       MODIFIER LETTER CIRCUMFLEX ACCENT
-        0x00ab: 0x00a8, #       DIAERESIS
-        0x00ac: 0x02dc, #       SMALL TILDE
-        0x00ad: 0x00d9, #       LATIN CAPITAL LETTER U WITH GRAVE
-        0x00ae: 0x00db, #       LATIN CAPITAL LETTER U WITH CIRCUMFLEX
-        0x00af: 0x20a4, #       LIRA SIGN
-        0x00b0: 0x00af, #       MACRON
-        0x00b1: 0x00dd, #       LATIN CAPITAL LETTER Y WITH ACUTE
-        0x00b2: 0x00fd, #       LATIN SMALL LETTER Y WITH ACUTE
-        0x00b3: 0x00b0, #       DEGREE SIGN
-        0x00b4: 0x00c7, #       LATIN CAPITAL LETTER C WITH CEDILLA
-        0x00b5: 0x00e7, #       LATIN SMALL LETTER C WITH CEDILLA
-        0x00b6: 0x00d1, #       LATIN CAPITAL LETTER N WITH TILDE
-        0x00b7: 0x00f1, #       LATIN SMALL LETTER N WITH TILDE
-        0x00b8: 0x00a1, #       INVERTED EXCLAMATION MARK
-        0x00b9: 0x00bf, #       INVERTED QUESTION MARK
-        0x00ba: 0x00a4, #       CURRENCY SIGN
-        0x00bb: 0x00a3, #       POUND SIGN
-        0x00bc: 0x00a5, #       YEN SIGN
-        0x00bd: 0x00a7, #       SECTION SIGN
-        0x00be: 0x0192, #       LATIN SMALL LETTER F WITH HOOK
-        0x00bf: 0x00a2, #       CENT SIGN
-        0x00c0: 0x00e2, #       LATIN SMALL LETTER A WITH CIRCUMFLEX
-        0x00c1: 0x00ea, #       LATIN SMALL LETTER E WITH CIRCUMFLEX
-        0x00c2: 0x00f4, #       LATIN SMALL LETTER O WITH CIRCUMFLEX
-        0x00c3: 0x00fb, #       LATIN SMALL LETTER U WITH CIRCUMFLEX
-        0x00c4: 0x00e1, #       LATIN SMALL LETTER A WITH ACUTE
-        0x00c5: 0x00e9, #       LATIN SMALL LETTER E WITH ACUTE
-        0x00c6: 0x00f3, #       LATIN SMALL LETTER O WITH ACUTE
-        0x00c7: 0x00fa, #       LATIN SMALL LETTER U WITH ACUTE
-        0x00c8: 0x00e0, #       LATIN SMALL LETTER A WITH GRAVE
-        0x00c9: 0x00e8, #       LATIN SMALL LETTER E WITH GRAVE
-        0x00ca: 0x00f2, #       LATIN SMALL LETTER O WITH GRAVE
-        0x00cb: 0x00f9, #       LATIN SMALL LETTER U WITH GRAVE
-        0x00cc: 0x00e4, #       LATIN SMALL LETTER A WITH DIAERESIS
-        0x00cd: 0x00eb, #       LATIN SMALL LETTER E WITH DIAERESIS
-        0x00ce: 0x00f6, #       LATIN SMALL LETTER O WITH DIAERESIS
-        0x00cf: 0x00fc, #       LATIN SMALL LETTER U WITH DIAERESIS
-        0x00d0: 0x00c5, #       LATIN CAPITAL LETTER A WITH RING ABOVE
-        0x00d1: 0x00ee, #       LATIN SMALL LETTER I WITH CIRCUMFLEX
-        0x00d2: 0x00d8, #       LATIN CAPITAL LETTER O WITH STROKE
-        0x00d3: 0x00c6, #       LATIN CAPITAL LETTER AE
-        0x00d4: 0x00e5, #       LATIN SMALL LETTER A WITH RING ABOVE
-        0x00d5: 0x00ed, #       LATIN SMALL LETTER I WITH ACUTE
-        0x00d6: 0x00f8, #       LATIN SMALL LETTER O WITH STROKE
-        0x00d7: 0x00e6, #       LATIN SMALL LETTER AE
-        0x00d8: 0x00c4, #       LATIN CAPITAL LETTER A WITH DIAERESIS
-        0x00d9: 0x00ec, #       LATIN SMALL LETTER I WITH GRAVE
-        0x00da: 0x00d6, #       LATIN CAPITAL LETTER O WITH DIAERESIS
-        0x00db: 0x00dc, #       LATIN CAPITAL LETTER U WITH DIAERESIS
-        0x00dc: 0x00c9, #       LATIN CAPITAL LETTER E WITH ACUTE
-        0x00dd: 0x00ef, #       LATIN SMALL LETTER I WITH DIAERESIS
-        0x00de: 0x00df, #       LATIN SMALL LETTER SHARP S (German)
-        0x00df: 0x00d4, #       LATIN CAPITAL LETTER O WITH CIRCUMFLEX
-        0x00e0: 0x00c1, #       LATIN CAPITAL LETTER A WITH ACUTE
-        0x00e1: 0x00c3, #       LATIN CAPITAL LETTER A WITH TILDE
-        0x00e2: 0x00e3, #       LATIN SMALL LETTER A WITH TILDE
-        0x00e3: 0x00d0, #       LATIN CAPITAL LETTER ETH (Icelandic)
-        0x00e4: 0x00f0, #       LATIN SMALL LETTER ETH (Icelandic)
-        0x00e5: 0x00cd, #       LATIN CAPITAL LETTER I WITH ACUTE
-        0x00e6: 0x00cc, #       LATIN CAPITAL LETTER I WITH GRAVE
-        0x00e7: 0x00d3, #       LATIN CAPITAL LETTER O WITH ACUTE
-        0x00e8: 0x00d2, #       LATIN CAPITAL LETTER O WITH GRAVE
-        0x00e9: 0x00d5, #       LATIN CAPITAL LETTER O WITH TILDE
-        0x00ea: 0x00f5, #       LATIN SMALL LETTER O WITH TILDE
-        0x00eb: 0x0160, #       LATIN CAPITAL LETTER S WITH CARON
-        0x00ec: 0x0161, #       LATIN SMALL LETTER S WITH CARON
-        0x00ed: 0x00da, #       LATIN CAPITAL LETTER U WITH ACUTE
-        0x00ee: 0x0178, #       LATIN CAPITAL LETTER Y WITH DIAERESIS
-        0x00ef: 0x00ff, #       LATIN SMALL LETTER Y WITH DIAERESIS
-        0x00f0: 0x00de, #       LATIN CAPITAL LETTER THORN (Icelandic)
-        0x00f1: 0x00fe, #       LATIN SMALL LETTER THORN (Icelandic)
-        0x00f2: 0x00b7, #       MIDDLE DOT
-        0x00f3: 0x00b5, #       MICRO SIGN
-        0x00f4: 0x00b6, #       PILCROW SIGN
-        0x00f5: 0x00be, #       VULGAR FRACTION THREE QUARTERS
-        0x00f6: 0x2014, #       EM DASH
-        0x00f7: 0x00bc, #       VULGAR FRACTION ONE QUARTER
-        0x00f8: 0x00bd, #       VULGAR FRACTION ONE HALF
-        0x00f9: 0x00aa, #       FEMININE ORDINAL INDICATOR
-        0x00fa: 0x00ba, #       MASCULINE ORDINAL INDICATOR
-        0x00fb: 0x00ab, #       LEFT-POINTING DOUBLE ANGLE QUOTATION MARK
-        0x00fc: 0x25a0, #       BLACK SQUARE
-        0x00fd: 0x00bb, #       RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK
-        0x00fe: 0x00b1, #       PLUS-MINUS SIGN
-        0x00ff: None,
-})
-
-### Encoding Map
-
-encoding_map = codecs.make_encoding_map(decoding_map)
+
+### Decoding Table
+
+decoding_table = (
+    '\x00'     #  0x00 -> NULL
+    '\x01'     #  0x01 -> START OF HEADING
+    '\x02'     #  0x02 -> START OF TEXT
+    '\x03'     #  0x03 -> END OF TEXT
+    '\x04'     #  0x04 -> END OF TRANSMISSION
+    '\x05'     #  0x05 -> ENQUIRY
+    '\x06'     #  0x06 -> ACKNOWLEDGE
+    '\x07'     #  0x07 -> BELL
+    '\x08'     #  0x08 -> BACKSPACE
+    '\t'       #  0x09 -> HORIZONTAL TABULATION
+    '\n'       #  0x0A -> LINE FEED
+    '\x0b'     #  0x0B -> VERTICAL TABULATION
+    '\x0c'     #  0x0C -> FORM FEED
+    '\r'       #  0x0D -> CARRIAGE RETURN
+    '\x0e'     #  0x0E -> SHIFT OUT
+    '\x0f'     #  0x0F -> SHIFT IN
+    '\x10'     #  0x10 -> DATA LINK ESCAPE
+    '\x11'     #  0x11 -> DEVICE CONTROL ONE
+    '\x12'     #  0x12 -> DEVICE CONTROL TWO
+    '\x13'     #  0x13 -> DEVICE CONTROL THREE
+    '\x14'     #  0x14 -> DEVICE CONTROL FOUR
+    '\x15'     #  0x15 -> NEGATIVE ACKNOWLEDGE
+    '\x16'     #  0x16 -> SYNCHRONOUS IDLE
+    '\x17'     #  0x17 -> END OF TRANSMISSION BLOCK
+    '\x18'     #  0x18 -> CANCEL
+    '\x19'     #  0x19 -> END OF MEDIUM
+    '\x1a'     #  0x1A -> SUBSTITUTE
+    '\x1b'     #  0x1B -> ESCAPE
+    '\x1c'     #  0x1C -> FILE SEPARATOR
+    '\x1d'     #  0x1D -> GROUP SEPARATOR
+    '\x1e'     #  0x1E -> RECORD SEPARATOR
+    '\x1f'     #  0x1F -> UNIT SEPARATOR
+    ' '        #  0x20 -> SPACE
+    '!'        #  0x21 -> EXCLAMATION MARK
+    '"'        #  0x22 -> QUOTATION MARK
+    '#'        #  0x23 -> NUMBER SIGN
+    '$'        #  0x24 -> DOLLAR SIGN
+    '%'        #  0x25 -> PERCENT SIGN
+    '&'        #  0x26 -> AMPERSAND
+    "'"        #  0x27 -> APOSTROPHE
+    '('        #  0x28 -> LEFT PARENTHESIS
+    ')'        #  0x29 -> RIGHT PARENTHESIS
+    '*'        #  0x2A -> ASTERISK
+    '+'        #  0x2B -> PLUS SIGN
+    ','        #  0x2C -> COMMA
+    '-'        #  0x2D -> HYPHEN-MINUS
+    '.'        #  0x2E -> FULL STOP
+    '/'        #  0x2F -> SOLIDUS
+    '0'        #  0x30 -> DIGIT ZERO
+    '1'        #  0x31 -> DIGIT ONE
+    '2'        #  0x32 -> DIGIT TWO
+    '3'        #  0x33 -> DIGIT THREE
+    '4'        #  0x34 -> DIGIT FOUR
+    '5'        #  0x35 -> DIGIT FIVE
+    '6'        #  0x36 -> DIGIT SIX
+    '7'        #  0x37 -> DIGIT SEVEN
+    '8'        #  0x38 -> DIGIT EIGHT
+    '9'        #  0x39 -> DIGIT NINE
+    ':'        #  0x3A -> COLON
+    ';'        #  0x3B -> SEMICOLON
+    '<'        #  0x3C -> LESS-THAN SIGN
+    '='        #  0x3D -> EQUALS SIGN
+    '>'        #  0x3E -> GREATER-THAN SIGN
+    '?'        #  0x3F -> QUESTION MARK
+    '@'        #  0x40 -> COMMERCIAL AT
+    'A'        #  0x41 -> LATIN CAPITAL LETTER A
+    'B'        #  0x42 -> LATIN CAPITAL LETTER B
+    'C'        #  0x43 -> LATIN CAPITAL LETTER C
+    'D'        #  0x44 -> LATIN CAPITAL LETTER D
+    'E'        #  0x45 -> LATIN CAPITAL LETTER E
+    'F'        #  0x46 -> LATIN CAPITAL LETTER F
+    'G'        #  0x47 -> LATIN CAPITAL LETTER G
+    'H'        #  0x48 -> LATIN CAPITAL LETTER H
+    'I'        #  0x49 -> LATIN CAPITAL LETTER I
+    'J'        #  0x4A -> LATIN CAPITAL LETTER J
+    'K'        #  0x4B -> LATIN CAPITAL LETTER K
+    'L'        #  0x4C -> LATIN CAPITAL LETTER L
+    'M'        #  0x4D -> LATIN CAPITAL LETTER M
+    'N'        #  0x4E -> LATIN CAPITAL LETTER N
+    'O'        #  0x4F -> LATIN CAPITAL LETTER O
+    'P'        #  0x50 -> LATIN CAPITAL LETTER P
+    'Q'        #  0x51 -> LATIN CAPITAL LETTER Q
+    'R'        #  0x52 -> LATIN CAPITAL LETTER R
+    'S'        #  0x53 -> LATIN CAPITAL LETTER S
+    'T'        #  0x54 -> LATIN CAPITAL LETTER T
+    'U'        #  0x55 -> LATIN CAPITAL LETTER U
+    'V'        #  0x56 -> LATIN CAPITAL LETTER V
+    'W'        #  0x57 -> LATIN CAPITAL LETTER W
+    'X'        #  0x58 -> LATIN CAPITAL LETTER X
+    'Y'        #  0x59 -> LATIN CAPITAL LETTER Y
+    'Z'        #  0x5A -> LATIN CAPITAL LETTER Z
+    '['        #  0x5B -> LEFT SQUARE BRACKET
+    '\\'       #  0x5C -> REVERSE SOLIDUS
+    ']'        #  0x5D -> RIGHT SQUARE BRACKET
+    '^'        #  0x5E -> CIRCUMFLEX ACCENT
+    '_'        #  0x5F -> LOW LINE
+    '`'        #  0x60 -> GRAVE ACCENT
+    'a'        #  0x61 -> LATIN SMALL LETTER A
+    'b'        #  0x62 -> LATIN SMALL LETTER B
+    'c'        #  0x63 -> LATIN SMALL LETTER C
+    'd'        #  0x64 -> LATIN SMALL LETTER D
+    'e'        #  0x65 -> LATIN SMALL LETTER E
+    'f'        #  0x66 -> LATIN SMALL LETTER F
+    'g'        #  0x67 -> LATIN SMALL LETTER G
+    'h'        #  0x68 -> LATIN SMALL LETTER H
+    'i'        #  0x69 -> LATIN SMALL LETTER I
+    'j'        #  0x6A -> LATIN SMALL LETTER J
+    'k'        #  0x6B -> LATIN SMALL LETTER K
+    'l'        #  0x6C -> LATIN SMALL LETTER L
+    'm'        #  0x6D -> LATIN SMALL LETTER M
+    'n'        #  0x6E -> LATIN SMALL LETTER N
+    'o'        #  0x6F -> LATIN SMALL LETTER O
+    'p'        #  0x70 -> LATIN SMALL LETTER P
+    'q'        #  0x71 -> LATIN SMALL LETTER Q
+    'r'        #  0x72 -> LATIN SMALL LETTER R
+    's'        #  0x73 -> LATIN SMALL LETTER S
+    't'        #  0x74 -> LATIN SMALL LETTER T
+    'u'        #  0x75 -> LATIN SMALL LETTER U
+    'v'        #  0x76 -> LATIN SMALL LETTER V
+    'w'        #  0x77 -> LATIN SMALL LETTER W
+    'x'        #  0x78 -> LATIN SMALL LETTER X
+    'y'        #  0x79 -> LATIN SMALL LETTER Y
+    'z'        #  0x7A -> LATIN SMALL LETTER Z
+    '{'        #  0x7B -> LEFT CURLY BRACKET
+    '|'        #  0x7C -> VERTICAL LINE
+    '}'        #  0x7D -> RIGHT CURLY BRACKET
+    '~'        #  0x7E -> TILDE
+    '\x7f'     #  0x7F -> DELETE
+    '\x80'     #  0x80 -> <control>
+    '\x81'     #  0x81 -> <control>
+    '\x82'     #  0x82 -> <control>
+    '\x83'     #  0x83 -> <control>
+    '\x84'     #  0x84 -> <control>
+    '\x85'     #  0x85 -> <control>
+    '\x86'     #  0x86 -> <control>
+    '\x87'     #  0x87 -> <control>
+    '\x88'     #  0x88 -> <control>
+    '\x89'     #  0x89 -> <control>
+    '\x8a'     #  0x8A -> <control>
+    '\x8b'     #  0x8B -> <control>
+    '\x8c'     #  0x8C -> <control>
+    '\x8d'     #  0x8D -> <control>
+    '\x8e'     #  0x8E -> <control>
+    '\x8f'     #  0x8F -> <control>
+    '\x90'     #  0x90 -> <control>
+    '\x91'     #  0x91 -> <control>
+    '\x92'     #  0x92 -> <control>
+    '\x93'     #  0x93 -> <control>
+    '\x94'     #  0x94 -> <control>
+    '\x95'     #  0x95 -> <control>
+    '\x96'     #  0x96 -> <control>
+    '\x97'     #  0x97 -> <control>
+    '\x98'     #  0x98 -> <control>
+    '\x99'     #  0x99 -> <control>
+    '\x9a'     #  0x9A -> <control>
+    '\x9b'     #  0x9B -> <control>
+    '\x9c'     #  0x9C -> <control>
+    '\x9d'     #  0x9D -> <control>
+    '\x9e'     #  0x9E -> <control>
+    '\x9f'     #  0x9F -> <control>
+    '\xa0'     #  0xA0 -> NO-BREAK SPACE
+    '\xc0'     #  0xA1 -> LATIN CAPITAL LETTER A WITH GRAVE
+    '\xc2'     #  0xA2 -> LATIN CAPITAL LETTER A WITH CIRCUMFLEX
+    '\xc8'     #  0xA3 -> LATIN CAPITAL LETTER E WITH GRAVE
+    '\xca'     #  0xA4 -> LATIN CAPITAL LETTER E WITH CIRCUMFLEX
+    '\xcb'     #  0xA5 -> LATIN CAPITAL LETTER E WITH DIAERESIS
+    '\xce'     #  0xA6 -> LATIN CAPITAL LETTER I WITH CIRCUMFLEX
+    '\xcf'     #  0xA7 -> LATIN CAPITAL LETTER I WITH DIAERESIS
+    '\xb4'     #  0xA8 -> ACUTE ACCENT
+    '\u02cb'   #  0xA9 -> MODIFIER LETTER GRAVE ACCENT (MANDARIN CHINESE FOURTH TONE)
+    '\u02c6'   #  0xAA -> MODIFIER LETTER CIRCUMFLEX ACCENT
+    '\xa8'     #  0xAB -> DIAERESIS
+    '\u02dc'   #  0xAC -> SMALL TILDE
+    '\xd9'     #  0xAD -> LATIN CAPITAL LETTER U WITH GRAVE
+    '\xdb'     #  0xAE -> LATIN CAPITAL LETTER U WITH CIRCUMFLEX
+    '\u20a4'   #  0xAF -> LIRA SIGN
+    '\xaf'     #  0xB0 -> MACRON
+    '\xdd'     #  0xB1 -> LATIN CAPITAL LETTER Y WITH ACUTE
+    '\xfd'     #  0xB2 -> LATIN SMALL LETTER Y WITH ACUTE
+    '\xb0'     #  0xB3 -> DEGREE SIGN
+    '\xc7'     #  0xB4 -> LATIN CAPITAL LETTER C WITH CEDILLA
+    '\xe7'     #  0xB5 -> LATIN SMALL LETTER C WITH CEDILLA
+    '\xd1'     #  0xB6 -> LATIN CAPITAL LETTER N WITH TILDE
+    '\xf1'     #  0xB7 -> LATIN SMALL LETTER N WITH TILDE
+    '\xa1'     #  0xB8 -> INVERTED EXCLAMATION MARK
+    '\xbf'     #  0xB9 -> INVERTED QUESTION MARK
+    '\xa4'     #  0xBA -> CURRENCY SIGN
+    '\xa3'     #  0xBB -> POUND SIGN
+    '\xa5'     #  0xBC -> YEN SIGN
+    '\xa7'     #  0xBD -> SECTION SIGN
+    '\u0192'   #  0xBE -> LATIN SMALL LETTER F WITH HOOK
+    '\xa2'     #  0xBF -> CENT SIGN
+    '\xe2'     #  0xC0 -> LATIN SMALL LETTER A WITH CIRCUMFLEX
+    '\xea'     #  0xC1 -> LATIN SMALL LETTER E WITH CIRCUMFLEX
+    '\xf4'     #  0xC2 -> LATIN SMALL LETTER O WITH CIRCUMFLEX
+    '\xfb'     #  0xC3 -> LATIN SMALL LETTER U WITH CIRCUMFLEX
+    '\xe1'     #  0xC4 -> LATIN SMALL LETTER A WITH ACUTE
+    '\xe9'     #  0xC5 -> LATIN SMALL LETTER E WITH ACUTE
+    '\xf3'     #  0xC6 -> LATIN SMALL LETTER O WITH ACUTE
+    '\xfa'     #  0xC7 -> LATIN SMALL LETTER U WITH ACUTE
+    '\xe0'     #  0xC8 -> LATIN SMALL LETTER A WITH GRAVE
+    '\xe8'     #  0xC9 -> LATIN SMALL LETTER E WITH GRAVE
+    '\xf2'     #  0xCA -> LATIN SMALL LETTER O WITH GRAVE
+    '\xf9'     #  0xCB -> LATIN SMALL LETTER U WITH GRAVE
+    '\xe4'     #  0xCC -> LATIN SMALL LETTER A WITH DIAERESIS
+    '\xeb'     #  0xCD -> LATIN SMALL LETTER E WITH DIAERESIS
+    '\xf6'     #  0xCE -> LATIN SMALL LETTER O WITH DIAERESIS
+    '\xfc'     #  0xCF -> LATIN SMALL LETTER U WITH DIAERESIS
+    '\xc5'     #  0xD0 -> LATIN CAPITAL LETTER A WITH RING ABOVE
+    '\xee'     #  0xD1 -> LATIN SMALL LETTER I WITH CIRCUMFLEX
+    '\xd8'     #  0xD2 -> LATIN CAPITAL LETTER O WITH STROKE
+    '\xc6'     #  0xD3 -> LATIN CAPITAL LETTER AE
+    '\xe5'     #  0xD4 -> LATIN SMALL LETTER A WITH RING ABOVE
+    '\xed'     #  0xD5 -> LATIN SMALL LETTER I WITH ACUTE
+    '\xf8'     #  0xD6 -> LATIN SMALL LETTER O WITH STROKE
+    '\xe6'     #  0xD7 -> LATIN SMALL LETTER AE
+    '\xc4'     #  0xD8 -> LATIN CAPITAL LETTER A WITH DIAERESIS
+    '\xec'     #  0xD9 -> LATIN SMALL LETTER I WITH GRAVE
+    '\xd6'     #  0xDA -> LATIN CAPITAL LETTER O WITH DIAERESIS
+    '\xdc'     #  0xDB -> LATIN CAPITAL LETTER U WITH DIAERESIS
+    '\xc9'     #  0xDC -> LATIN CAPITAL LETTER E WITH ACUTE
+    '\xef'     #  0xDD -> LATIN SMALL LETTER I WITH DIAERESIS
+    '\xdf'     #  0xDE -> LATIN SMALL LETTER SHARP S (GERMAN)
+    '\xd4'     #  0xDF -> LATIN CAPITAL LETTER O WITH CIRCUMFLEX
+    '\xc1'     #  0xE0 -> LATIN CAPITAL LETTER A WITH ACUTE
+    '\xc3'     #  0xE1 -> LATIN CAPITAL LETTER A WITH TILDE
+    '\xe3'     #  0xE2 -> LATIN SMALL LETTER A WITH TILDE
+    '\xd0'     #  0xE3 -> LATIN CAPITAL LETTER ETH (ICELANDIC)
+    '\xf0'     #  0xE4 -> LATIN SMALL LETTER ETH (ICELANDIC)
+    '\xcd'     #  0xE5 -> LATIN CAPITAL LETTER I WITH ACUTE
+    '\xcc'     #  0xE6 -> LATIN CAPITAL LETTER I WITH GRAVE
+    '\xd3'     #  0xE7 -> LATIN CAPITAL LETTER O WITH ACUTE
+    '\xd2'     #  0xE8 -> LATIN CAPITAL LETTER O WITH GRAVE
+    '\xd5'     #  0xE9 -> LATIN CAPITAL LETTER O WITH TILDE
+    '\xf5'     #  0xEA -> LATIN SMALL LETTER O WITH TILDE
+    '\u0160'   #  0xEB -> LATIN CAPITAL LETTER S WITH CARON
+    '\u0161'   #  0xEC -> LATIN SMALL LETTER S WITH CARON
+    '\xda'     #  0xED -> LATIN CAPITAL LETTER U WITH ACUTE
+    '\u0178'   #  0xEE -> LATIN CAPITAL LETTER Y WITH DIAERESIS
+    '\xff'     #  0xEF -> LATIN SMALL LETTER Y WITH DIAERESIS
+    '\xde'     #  0xF0 -> LATIN CAPITAL LETTER THORN (ICELANDIC)
+    '\xfe'     #  0xF1 -> LATIN SMALL LETTER THORN (ICELANDIC)
+    '\xb7'     #  0xF2 -> MIDDLE DOT
+    '\xb5'     #  0xF3 -> MICRO SIGN
+    '\xb6'     #  0xF4 -> PILCROW SIGN
+    '\xbe'     #  0xF5 -> VULGAR FRACTION THREE QUARTERS
+    '\u2014'   #  0xF6 -> EM DASH
+    '\xbc'     #  0xF7 -> VULGAR FRACTION ONE QUARTER
+    '\xbd'     #  0xF8 -> VULGAR FRACTION ONE HALF
+    '\xaa'     #  0xF9 -> FEMININE ORDINAL INDICATOR
+    '\xba'     #  0xFA -> MASCULINE ORDINAL INDICATOR
+    '\xab'     #  0xFB -> LEFT-POINTING DOUBLE ANGLE QUOTATION MARK
+    '\u25a0'   #  0xFC -> BLACK SQUARE
+    '\xbb'     #  0xFD -> RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK
+    '\xb1'     #  0xFE -> PLUS-MINUS SIGN
+    '\ufffe'
+)
+
+### Encoding table
+encoding_table=codecs.charmap_build(decoding_table)
+