Patch #1359618: Speed-up charmap encoder.

1 files changed, 4 insertions, 223 deletions

diff --git a/Lib/encodings/cp424.py b/Lib/encodings/cp424.py
index 966aecb..b83787e 100644
--- a/Lib/encodings/cp424.py
+++ b/Lib/encodings/cp424.py
@@ -9,14 +9,14 @@ 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_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):
@@ -303,225 +303,6 @@ decoding_table = (
     u'\x9f'     #  0xFF -> EIGHT ONES
 )
 
-### Encoding Map
+### Encoding table
+encoding_table=codecs.charmap_build(decoding_table)
 
-encoding_map = {
-    0x0000: 0x00,       #  NULL
-    0x0001: 0x01,       #  START OF HEADING
-    0x0002: 0x02,       #  START OF TEXT
-    0x0003: 0x03,       #  END OF TEXT
-    0x0004: 0x37,       #  END OF TRANSMISSION
-    0x0005: 0x2D,       #  ENQUIRY
-    0x0006: 0x2E,       #  ACKNOWLEDGE
-    0x0007: 0x2F,       #  BELL
-    0x0008: 0x16,       #  BACKSPACE
-    0x0009: 0x05,       #  HORIZONTAL TABULATION
-    0x000A: 0x25,       #  LINE FEED
-    0x000B: 0x0B,       #  VERTICAL TABULATION
-    0x000C: 0x0C,       #  FORM FEED
-    0x000D: 0x0D,       #  CARRIAGE RETURN
-    0x000E: 0x0E,       #  SHIFT OUT
-    0x000F: 0x0F,       #  SHIFT IN
-    0x0010: 0x10,       #  DATA LINK ESCAPE
-    0x0011: 0x11,       #  DEVICE CONTROL ONE
-    0x0012: 0x12,       #  DEVICE CONTROL TWO
-    0x0013: 0x13,       #  DEVICE CONTROL THREE
-    0x0014: 0x3C,       #  DEVICE CONTROL FOUR
-    0x0015: 0x3D,       #  NEGATIVE ACKNOWLEDGE
-    0x0016: 0x32,       #  SYNCHRONOUS IDLE
-    0x0017: 0x26,       #  END OF TRANSMISSION BLOCK
-    0x0018: 0x18,       #  CANCEL
-    0x0019: 0x19,       #  END OF MEDIUM
-    0x001A: 0x3F,       #  SUBSTITUTE
-    0x001B: 0x27,       #  ESCAPE
-    0x001C: 0x1C,       #  FILE SEPARATOR
-    0x001D: 0x1D,       #  GROUP SEPARATOR
-    0x001E: 0x1E,       #  RECORD SEPARATOR
-    0x001F: 0x1F,       #  UNIT SEPARATOR
-    0x0020: 0x40,       #  SPACE
-    0x0021: 0x5A,       #  EXCLAMATION MARK
-    0x0022: 0x7F,       #  QUOTATION MARK
-    0x0023: 0x7B,       #  NUMBER SIGN
-    0x0024: 0x5B,       #  DOLLAR SIGN
-    0x0025: 0x6C,       #  PERCENT SIGN
-    0x0026: 0x50,       #  AMPERSAND
-    0x0027: 0x7D,       #  APOSTROPHE
-    0x0028: 0x4D,       #  LEFT PARENTHESIS
-    0x0029: 0x5D,       #  RIGHT PARENTHESIS
-    0x002A: 0x5C,       #  ASTERISK
-    0x002B: 0x4E,       #  PLUS SIGN
-    0x002C: 0x6B,       #  COMMA
-    0x002D: 0x60,       #  HYPHEN-MINUS
-    0x002E: 0x4B,       #  FULL STOP
-    0x002F: 0x61,       #  SOLIDUS
-    0x0030: 0xF0,       #  DIGIT ZERO
-    0x0031: 0xF1,       #  DIGIT ONE
-    0x0032: 0xF2,       #  DIGIT TWO
-    0x0033: 0xF3,       #  DIGIT THREE
-    0x0034: 0xF4,       #  DIGIT FOUR
-    0x0035: 0xF5,       #  DIGIT FIVE
-    0x0036: 0xF6,       #  DIGIT SIX
-    0x0037: 0xF7,       #  DIGIT SEVEN
-    0x0038: 0xF8,       #  DIGIT EIGHT
-    0x0039: 0xF9,       #  DIGIT NINE
-    0x003A: 0x7A,       #  COLON
-    0x003B: 0x5E,       #  SEMICOLON
-    0x003C: 0x4C,       #  LESS-THAN SIGN
-    0x003D: 0x7E,       #  EQUALS SIGN
-    0x003E: 0x6E,       #  GREATER-THAN SIGN
-    0x003F: 0x6F,       #  QUESTION MARK
-    0x0040: 0x7C,       #  COMMERCIAL AT
-    0x0041: 0xC1,       #  LATIN CAPITAL LETTER A
-    0x0042: 0xC2,       #  LATIN CAPITAL LETTER B
-    0x0043: 0xC3,       #  LATIN CAPITAL LETTER C
-    0x0044: 0xC4,       #  LATIN CAPITAL LETTER D
-    0x0045: 0xC5,       #  LATIN CAPITAL LETTER E
-    0x0046: 0xC6,       #  LATIN CAPITAL LETTER F
-    0x0047: 0xC7,       #  LATIN CAPITAL LETTER G
-    0x0048: 0xC8,       #  LATIN CAPITAL LETTER H
-    0x0049: 0xC9,       #  LATIN CAPITAL LETTER I
-    0x004A: 0xD1,       #  LATIN CAPITAL LETTER J
-    0x004B: 0xD2,       #  LATIN CAPITAL LETTER K
-    0x004C: 0xD3,       #  LATIN CAPITAL LETTER L
-    0x004D: 0xD4,       #  LATIN CAPITAL LETTER M
-    0x004E: 0xD5,       #  LATIN CAPITAL LETTER N
-    0x004F: 0xD6,       #  LATIN CAPITAL LETTER O
-    0x0050: 0xD7,       #  LATIN CAPITAL LETTER P
-    0x0051: 0xD8,       #  LATIN CAPITAL LETTER Q
-    0x0052: 0xD9,       #  LATIN CAPITAL LETTER R
-    0x0053: 0xE2,       #  LATIN CAPITAL LETTER S
-    0x0054: 0xE3,       #  LATIN CAPITAL LETTER T
-    0x0055: 0xE4,       #  LATIN CAPITAL LETTER U
-    0x0056: 0xE5,       #  LATIN CAPITAL LETTER V
-    0x0057: 0xE6,       #  LATIN CAPITAL LETTER W
-    0x0058: 0xE7,       #  LATIN CAPITAL LETTER X
-    0x0059: 0xE8,       #  LATIN CAPITAL LETTER Y
-    0x005A: 0xE9,       #  LATIN CAPITAL LETTER Z
-    0x005B: 0xBA,       #  LEFT SQUARE BRACKET
-    0x005C: 0xE0,       #  REVERSE SOLIDUS
-    0x005D: 0xBB,       #  RIGHT SQUARE BRACKET
-    0x005E: 0xB0,       #  CIRCUMFLEX ACCENT
-    0x005F: 0x6D,       #  LOW LINE
-    0x0060: 0x79,       #  GRAVE ACCENT
-    0x0061: 0x81,       #  LATIN SMALL LETTER A
-    0x0062: 0x82,       #  LATIN SMALL LETTER B
-    0x0063: 0x83,       #  LATIN SMALL LETTER C
-    0x0064: 0x84,       #  LATIN SMALL LETTER D
-    0x0065: 0x85,       #  LATIN SMALL LETTER E
-    0x0066: 0x86,       #  LATIN SMALL LETTER F
-    0x0067: 0x87,       #  LATIN SMALL LETTER G
-    0x0068: 0x88,       #  LATIN SMALL LETTER H
-    0x0069: 0x89,       #  LATIN SMALL LETTER I
-    0x006A: 0x91,       #  LATIN SMALL LETTER J
-    0x006B: 0x92,       #  LATIN SMALL LETTER K
-    0x006C: 0x93,       #  LATIN SMALL LETTER L
-    0x006D: 0x94,       #  LATIN SMALL LETTER M
-    0x006E: 0x95,       #  LATIN SMALL LETTER N
-    0x006F: 0x96,       #  LATIN SMALL LETTER O
-    0x0070: 0x97,       #  LATIN SMALL LETTER P
-    0x0071: 0x98,       #  LATIN SMALL LETTER Q
-    0x0072: 0x99,       #  LATIN SMALL LETTER R
-    0x0073: 0xA2,       #  LATIN SMALL LETTER S
-    0x0074: 0xA3,       #  LATIN SMALL LETTER T
-    0x0075: 0xA4,       #  LATIN SMALL LETTER U
-    0x0076: 0xA5,       #  LATIN SMALL LETTER V
-    0x0077: 0xA6,       #  LATIN SMALL LETTER W
-    0x0078: 0xA7,       #  LATIN SMALL LETTER X
-    0x0079: 0xA8,       #  LATIN SMALL LETTER Y
-    0x007A: 0xA9,       #  LATIN SMALL LETTER Z
-    0x007B: 0xC0,       #  LEFT CURLY BRACKET
-    0x007C: 0x4F,       #  VERTICAL LINE
-    0x007D: 0xD0,       #  RIGHT CURLY BRACKET
-    0x007E: 0xA1,       #  TILDE
-    0x007F: 0x07,       #  DELETE
-    0x0080: 0x20,       #  DIGIT SELECT
-    0x0081: 0x21,       #  START OF SIGNIFICANCE
-    0x0082: 0x22,       #  FIELD SEPARATOR
-    0x0083: 0x23,       #  WORD UNDERSCORE
-    0x0084: 0x24,       #  BYPASS OR INHIBIT PRESENTATION
-    0x0085: 0x15,       #  NEW LINE
-    0x0086: 0x06,       #  REQUIRED NEW LINE
-    0x0087: 0x17,       #  PROGRAM OPERATOR COMMUNICATION
-    0x0088: 0x28,       #  SET ATTRIBUTE
-    0x0089: 0x29,       #  START FIELD EXTENDED
-    0x008A: 0x2A,       #  SET MODE OR SWITCH
-    0x008B: 0x2B,       #  CONTROL SEQUENCE PREFIX
-    0x008C: 0x2C,       #  MODIFY FIELD ATTRIBUTE
-    0x008D: 0x09,       #  SUPERSCRIPT
-    0x008E: 0x0A,       #  REPEAT
-    0x008F: 0x1B,       #  CUSTOMER USE ONE
-    0x0090: 0x30,       #  <reserved>
-    0x0091: 0x31,       #  <reserved>
-    0x0092: 0x1A,       #  UNIT BACK SPACE
-    0x0093: 0x33,       #  INDEX RETURN
-    0x0094: 0x34,       #  PRESENTATION POSITION
-    0x0095: 0x35,       #  TRANSPARENT
-    0x0096: 0x36,       #  NUMERIC BACKSPACE
-    0x0097: 0x08,       #  GRAPHIC ESCAPE
-    0x0098: 0x38,       #  SUBSCRIPT
-    0x0099: 0x39,       #  INDENT TABULATION
-    0x009A: 0x3A,       #  REVERSE FORM FEED
-    0x009B: 0x3B,       #  CUSTOMER USE THREE
-    0x009C: 0x04,       #  SELECT
-    0x009D: 0x14,       #  RESTORE/ENABLE PRESENTATION
-    0x009E: 0x3E,       #  <reserved>
-    0x009F: 0xFF,       #  EIGHT ONES
-    0x00A0: 0x74,       #  NO-BREAK SPACE
-    0x00A2: 0x4A,       #  CENT SIGN
-    0x00A3: 0xB1,       #  POUND SIGN
-    0x00A4: 0x9F,       #  CURRENCY SIGN
-    0x00A5: 0xB2,       #  YEN SIGN
-    0x00A6: 0x6A,       #  BROKEN BAR
-    0x00A7: 0xB5,       #  SECTION SIGN
-    0x00A8: 0xBD,       #  DIAERESIS
-    0x00A9: 0xB4,       #  COPYRIGHT SIGN
-    0x00AB: 0x8A,       #  LEFT-POINTING DOUBLE ANGLE QUOTATION MARK
-    0x00AC: 0x5F,       #  NOT SIGN
-    0x00AD: 0xCA,       #  SOFT HYPHEN
-    0x00AE: 0xAF,       #  REGISTERED SIGN
-    0x00AF: 0xBC,       #  MACRON
-    0x00B0: 0x90,       #  DEGREE SIGN
-    0x00B1: 0x8F,       #  PLUS-MINUS SIGN
-    0x00B2: 0xEA,       #  SUPERSCRIPT TWO
-    0x00B3: 0xFA,       #  SUPERSCRIPT THREE
-    0x00B4: 0xBE,       #  ACUTE ACCENT
-    0x00B5: 0xA0,       #  MICRO SIGN
-    0x00B6: 0xB6,       #  PILCROW SIGN
-    0x00B7: 0xB3,       #  MIDDLE DOT
-    0x00B8: 0x9D,       #  CEDILLA
-    0x00B9: 0xDA,       #  SUPERSCRIPT ONE
-    0x00BB: 0x8B,       #  RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK
-    0x00BC: 0xB7,       #  VULGAR FRACTION ONE QUARTER
-    0x00BD: 0xB8,       #  VULGAR FRACTION ONE HALF
-    0x00BE: 0xB9,       #  VULGAR FRACTION THREE QUARTERS
-    0x00D7: 0xBF,       #  MULTIPLICATION SIGN
-    0x00F7: 0xE1,       #  DIVISION SIGN
-    0x05D0: 0x41,       #  HEBREW LETTER ALEF
-    0x05D1: 0x42,       #  HEBREW LETTER BET
-    0x05D2: 0x43,       #  HEBREW LETTER GIMEL
-    0x05D3: 0x44,       #  HEBREW LETTER DALET
-    0x05D4: 0x45,       #  HEBREW LETTER HE
-    0x05D5: 0x46,       #  HEBREW LETTER VAV
-    0x05D6: 0x47,       #  HEBREW LETTER ZAYIN
-    0x05D7: 0x48,       #  HEBREW LETTER HET
-    0x05D8: 0x49,       #  HEBREW LETTER TET
-    0x05D9: 0x51,       #  HEBREW LETTER YOD
-    0x05DA: 0x52,       #  HEBREW LETTER FINAL KAF
-    0x05DB: 0x53,       #  HEBREW LETTER KAF
-    0x05DC: 0x54,       #  HEBREW LETTER LAMED
-    0x05DD: 0x55,       #  HEBREW LETTER FINAL MEM
-    0x05DE: 0x56,       #  HEBREW LETTER MEM
-    0x05DF: 0x57,       #  HEBREW LETTER FINAL NUN
-    0x05E0: 0x58,       #  HEBREW LETTER NUN
-    0x05E1: 0x59,       #  HEBREW LETTER SAMEKH
-    0x05E2: 0x62,       #  HEBREW LETTER AYIN
-    0x05E3: 0x63,       #  HEBREW LETTER FINAL PE
-    0x05E4: 0x64,       #  HEBREW LETTER PE
-    0x05E5: 0x65,       #  HEBREW LETTER FINAL TSADI
-    0x05E6: 0x66,       #  HEBREW LETTER TSADI
-    0x05E7: 0x67,       #  HEBREW LETTER QOF
-    0x05E8: 0x68,       #  HEBREW LETTER RESH
-    0x05E9: 0x69,       #  HEBREW LETTER SHIN
-    0x05EA: 0x71,       #  HEBREW LETTER TAV
-    0x2017: 0x78,       #  DOUBLE LOW LINE
-}