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372 lines
15 KiB
Python
Executable File
372 lines
15 KiB
Python
Executable File
#!/usr/bin/python3
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# -*- coding: utf-8 -*-
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# Copyright (C) 2014-2020 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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#
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with the GNU C Library; if not, see
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# <https://www.gnu.org/licenses/>.
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'''glibc/localedata/charmaps/UTF-8 file generator script
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This script generates a glibc/localedata/charmaps/UTF-8 file
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from Unicode data.
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Usage: python3 utf8_gen.py UnicodeData.txt EastAsianWidth.txt
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It will output UTF-8 file
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'''
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import argparse
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import sys
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import re
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import unicode_utils
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# Auxiliary tables for Hangul syllable names, see the Unicode 3.0 book,
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# sections 3.11 and 4.4.
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JAMO_INITIAL_SHORT_NAME = (
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'G', 'GG', 'N', 'D', 'DD', 'R', 'M', 'B', 'BB', 'S', 'SS', '', 'J', 'JJ',
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'C', 'K', 'T', 'P', 'H'
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)
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JAMO_MEDIAL_SHORT_NAME = (
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'A', 'AE', 'YA', 'YAE', 'EO', 'E', 'YEO', 'YE', 'O', 'WA', 'WAE', 'OE',
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'YO', 'U', 'WEO', 'WE', 'WI', 'YU', 'EU', 'YI', 'I'
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)
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JAMO_FINAL_SHORT_NAME = (
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'', 'G', 'GG', 'GS', 'N', 'NI', 'NH', 'D', 'L', 'LG', 'LM', 'LB', 'LS',
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'LT', 'LP', 'LH', 'M', 'B', 'BS', 'S', 'SS', 'NG', 'J', 'C', 'K', 'T',
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'P', 'H'
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)
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def process_range(start, end, outfile, name):
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'''Writes a range of code points into the CHARMAP section of the
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output file
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'''
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if 'Hangul Syllable' in name:
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# from glibc/localedata/ChangeLog:
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#
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# 2000-09-24 Bruno Haible <haible@clisp.cons.org>
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# * charmaps/UTF-8: Expand <Hangul Syllable> and <Private Use> ranges,
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# so they become printable and carry a width. Comment out surrogate
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# ranges. Add a WIDTH table
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#
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# So we expand the Hangul Syllables here:
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for i in range(int(start, 16), int(end, 16)+1 ):
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index2, index3 = divmod(i - 0xaC00, 28)
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index1, index2 = divmod(index2, 21)
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hangul_syllable_name = 'HANGUL SYLLABLE ' \
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+ JAMO_INITIAL_SHORT_NAME[index1] \
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+ JAMO_MEDIAL_SHORT_NAME[index2] \
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+ JAMO_FINAL_SHORT_NAME[index3]
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outfile.write('{:<11s} {:<12s} {:s}\n'.format(
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unicode_utils.ucs_symbol(i), convert_to_hex(i),
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hangul_syllable_name))
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return
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# UnicodeData.txt file has contains code point ranges like this:
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#
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# 3400;<CJK Ideograph Extension A, First>;Lo;0;L;;;;;N;;;;;
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# 4DB5;<CJK Ideograph Extension A, Last>;Lo;0;L;;;;;N;;;;;
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#
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# The glibc UTF-8 file splits ranges like these into shorter
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# ranges of 64 code points each:
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#
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# <U3400>..<U343F> /xe3/x90/x80 <CJK Ideograph Extension A>
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# …
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# <U4D80>..<U4DB5> /xe4/xb6/x80 <CJK Ideograph Extension A>
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for i in range(int(start, 16), int(end, 16), 64 ):
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if i > (int(end, 16)-64):
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outfile.write('{:s}..{:s} {:<12s} {:s}\n'.format(
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unicode_utils.ucs_symbol(i),
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unicode_utils.ucs_symbol(int(end,16)),
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convert_to_hex(i),
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name))
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break
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outfile.write('{:s}..{:s} {:<12s} {:s}\n'.format(
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unicode_utils.ucs_symbol(i),
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unicode_utils.ucs_symbol(i+63),
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convert_to_hex(i),
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name))
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def process_charmap(flines, outfile):
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'''This function takes an array which contains *all* lines of
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of UnicodeData.txt and write lines to outfile as used in the
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CHARMAP
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…
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END CHARMAP
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section of the UTF-8 file in glibc/localedata/charmaps/UTF-8.
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Samples for input lines:
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0010;<control>;Cc;0;BN;;;;;N;DATA LINK ESCAPE;;;;
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3400;<CJK Ideograph Extension A, First>;Lo;0;L;;;;;N;;;;;
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4DB5;<CJK Ideograph Extension A, Last>;Lo;0;L;;;;;N;;;;;
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D800;<Non Private Use High Surrogate, First>;Cs;0;L;;;;;N;;;;;
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DB7F;<Non Private Use High Surrogate, Last>;Cs;0;L;;;;;N;;;;;
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100000;<Plane 16 Private Use, First>;Co;0;L;;;;;N;;;;;
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10FFFD;<Plane 16 Private Use, Last>;Co;0;L;;;;;N;;;;;
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Samples for output lines (Unicode-Value UTF-8-HEX Unicode-Char-Name):
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<U0010> /x10 DATA LINK ESCAPE
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<U3400>..<U343F> /xe3/x90/x80 <CJK Ideograph Extension A>
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%<UD800> /xed/xa0/x80 <Non Private Use High Surrogate, First>
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%<UDB7F> /xed/xad/xbf <Non Private Use High Surrogate, Last>
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<U0010FFC0>..<U0010FFFD> /xf4/x8f/xbf/x80 <Plane 16 Private Use>
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'''
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fields_start = []
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for line in flines:
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fields = line.split(";")
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# Some characters have “<control>” as their name. We try to
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# use the “Unicode 1.0 Name” (10th field in
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# UnicodeData.txt) for them.
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#
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# The Characters U+0080, U+0081, U+0084 and U+0099 have
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# “<control>” as their name but do not even have aa
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# ”Unicode 1.0 Name”. We could write code to take their
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# alternate names from NameAliases.txt.
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if fields[1] == "<control>" and fields[10]:
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fields[1] = fields[10]
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# Handling code point ranges like:
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#
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# 3400;<CJK Ideograph Extension A, First>;Lo;0;L;;;;;N;;;;;
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# 4DB5;<CJK Ideograph Extension A, Last>;Lo;0;L;;;;;N;;;;;
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if fields[1].endswith(', First>') and not 'Surrogate,' in fields[1]:
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fields_start = fields
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continue
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if fields[1].endswith(', Last>') and not 'Surrogate,' in fields[1]:
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process_range(fields_start[0], fields[0],
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outfile, fields[1][:-7]+'>')
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fields_start = []
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continue
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fields_start = []
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if 'Surrogate,' in fields[1]:
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# Comment out the surrogates in the UTF-8 file.
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# One could of course skip them completely but
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# the original UTF-8 file in glibc had them as
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# comments, so we keep these comment lines.
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outfile.write('%')
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outfile.write('{:<11s} {:<12s} {:s}\n'.format(
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unicode_utils.ucs_symbol(int(fields[0], 16)),
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convert_to_hex(int(fields[0], 16)),
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fields[1]))
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def convert_to_hex(code_point):
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'''Converts a code point to a hexadecimal UTF-8 representation
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like /x**/x**/x**.'''
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# Getting UTF8 of Unicode characters.
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# In Python3, .encode('UTF-8') does not work for
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# surrogates. Therefore, we use this conversion table
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surrogates = {
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0xD800: '/xed/xa0/x80',
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0xDB7F: '/xed/xad/xbf',
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0xDB80: '/xed/xae/x80',
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0xDBFF: '/xed/xaf/xbf',
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0xDC00: '/xed/xb0/x80',
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0xDFFF: '/xed/xbf/xbf',
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}
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if code_point in surrogates:
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return surrogates[code_point]
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return ''.join([
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'/x{:02x}'.format(c) for c in chr(code_point).encode('UTF-8')
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])
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def write_header_charmap(outfile):
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'''Write the header on top of the CHARMAP section to the output file'''
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outfile.write("<code_set_name> UTF-8\n")
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outfile.write("<comment_char> %\n")
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outfile.write("<escape_char> /\n")
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outfile.write("<mb_cur_min> 1\n")
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outfile.write("<mb_cur_max> 6\n\n")
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outfile.write("% CHARMAP generated using utf8_gen.py\n")
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outfile.write("% alias ISO-10646/UTF-8\n")
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outfile.write("CHARMAP\n")
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def write_header_width(outfile, unicode_version):
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'''Writes the header on top of the WIDTH section to the output file'''
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outfile.write('% Character width according to Unicode '
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+ '{:s}.\n'.format(unicode_version))
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outfile.write('% - Default width is 1.\n')
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outfile.write('% - Double-width characters have width 2; generated from\n')
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outfile.write('% "grep \'^[^;]*;[WF]\' EastAsianWidth.txt"\n')
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outfile.write('% - Non-spacing characters have width 0; '
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+ 'generated from PropList.txt or\n')
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outfile.write('% "grep \'^[^;]*;[^;]*;[^;]*;[^;]*;NSM;\' '
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+ 'UnicodeData.txt"\n')
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outfile.write('% - Format control characters have width 0; '
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+ 'generated from\n')
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outfile.write("% \"grep '^[^;]*;[^;]*;Cf;' UnicodeData.txt\"\n")
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# Not needed covered by Cf
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# outfile.write("% - Zero width characters have width 0; generated from\n")
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# outfile.write("% \"grep '^[^;]*;ZERO WIDTH ' UnicodeData.txt\"\n")
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outfile.write("WIDTH\n")
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def process_width(outfile, ulines, elines, plines):
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'''ulines are lines from UnicodeData.txt, elines are lines from
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EastAsianWidth.txt containing characters with width “W” or “F”,
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plines are lines from PropList.txt which contain characters
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with the property “Prepended_Concatenation_Mark”.
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'''
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width_dict = {}
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for line in elines:
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fields = line.split(";")
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if not '..' in fields[0]:
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code_points = (fields[0], fields[0])
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else:
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code_points = fields[0].split("..")
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for key in range(int(code_points[0], 16),
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int(code_points[1], 16)+1):
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width_dict[key] = 2
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for line in ulines:
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fields = line.split(";")
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if fields[4] == "NSM" or fields[2] in ("Cf", "Me", "Mn"):
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width_dict[int(fields[0], 16)] = 0
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for line in plines:
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# Characters with the property “Prepended_Concatenation_Mark”
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# should have the width 1:
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fields = line.split(";")
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if not '..' in fields[0]:
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code_points = (fields[0], fields[0])
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else:
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code_points = fields[0].split("..")
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for key in range(int(code_points[0], 16),
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int(code_points[1], 16)+1):
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del width_dict[key] # default width is 1
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# handle special cases for compatibility
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for key in list((0x00AD,)):
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# https://www.cs.tut.fi/~jkorpela/shy.html
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if key in width_dict:
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del width_dict[key] # default width is 1
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for key in list(range(0x1160, 0x1200)):
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# Hangul jungseong and jongseong:
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if key in unicode_utils.UNICODE_ATTRIBUTES:
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width_dict[key] = 0
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for key in list(range(0xD7B0, 0xD800)):
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# Hangul jungseong and jongseong:
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if key in unicode_utils.UNICODE_ATTRIBUTES:
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width_dict[key] = 0
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for key in list(range(0x3248, 0x3250)):
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# These are “A” which means we can decide whether to treat them
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# as “W” or “N” based on context:
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# http://www.unicode.org/mail-arch/unicode-ml/y2017-m08/0023.html
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# For us, “W” seems better.
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width_dict[key] = 2
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for key in list(range(0x4DC0, 0x4E00)):
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width_dict[key] = 2
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same_width_lists = []
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current_width_list = []
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for key in sorted(width_dict):
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if not current_width_list:
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current_width_list = [key]
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elif (key == current_width_list[-1] + 1
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and width_dict[key] == width_dict[current_width_list[0]]):
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current_width_list.append(key)
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else:
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same_width_lists.append(current_width_list)
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current_width_list = [key]
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if current_width_list:
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same_width_lists.append(current_width_list)
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for same_width_list in same_width_lists:
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if len(same_width_list) == 1:
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outfile.write('{:s}\t{:d}\n'.format(
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unicode_utils.ucs_symbol(same_width_list[0]),
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width_dict[same_width_list[0]]))
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else:
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outfile.write('{:s}...{:s}\t{:d}\n'.format(
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unicode_utils.ucs_symbol(same_width_list[0]),
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unicode_utils.ucs_symbol(same_width_list[-1]),
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width_dict[same_width_list[0]]))
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if __name__ == "__main__":
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PARSER = argparse.ArgumentParser(
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description='''
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Generate a UTF-8 file from UnicodeData.txt, EastAsianWidth.txt, and PropList.txt.
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''')
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PARSER.add_argument(
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'-u', '--unicode_data_file',
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nargs='?',
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type=str,
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default='UnicodeData.txt',
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help=('The UnicodeData.txt file to read, '
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+ 'default: %(default)s'))
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PARSER.add_argument(
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'-e', '--east_asian_with_file',
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nargs='?',
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type=str,
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default='EastAsianWidth.txt',
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help=('The EastAsianWidth.txt file to read, '
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+ 'default: %(default)s'))
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PARSER.add_argument(
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'-p', '--prop_list_file',
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nargs='?',
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type=str,
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default='PropList.txt',
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help=('The PropList.txt file to read, '
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+ 'default: %(default)s'))
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PARSER.add_argument(
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'--unicode_version',
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nargs='?',
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required=True,
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type=str,
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help='The Unicode version of the input files used.')
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ARGS = PARSER.parse_args()
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unicode_utils.fill_attributes(ARGS.unicode_data_file)
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with open(ARGS.unicode_data_file, mode='r') as UNIDATA_FILE:
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UNICODE_DATA_LINES = UNIDATA_FILE.readlines()
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with open(ARGS.east_asian_with_file, mode='r') as EAST_ASIAN_WIDTH_FILE:
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EAST_ASIAN_WIDTH_LINES = []
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for LINE in EAST_ASIAN_WIDTH_FILE:
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# If characters from EastAasianWidth.txt which are from
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# from reserved ranges (i.e. not yet assigned code points)
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# are added to the WIDTH section of the UTF-8 file, then
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# “make check” produces “Unknown Character” errors for
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# these code points because such unassigned code points
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# are not in the CHARMAP section of the UTF-8 file.
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#
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# Therefore, we skip all reserved code points when reading
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# the EastAsianWidth.txt file.
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if re.match(r'.*<reserved-.+>\.\.<reserved-.+>.*', LINE):
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continue
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if re.match(r'^[^;]*;[WF]', LINE):
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EAST_ASIAN_WIDTH_LINES.append(LINE.strip())
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with open(ARGS.prop_list_file, mode='r') as PROP_LIST_FILE:
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PROP_LIST_LINES = []
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for LINE in PROP_LIST_FILE:
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if re.match(r'^[^;]*;[\s]*Prepended_Concatenation_Mark', LINE):
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PROP_LIST_LINES.append(LINE.strip())
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with open('UTF-8', mode='w') as OUTFILE:
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# Processing UnicodeData.txt and write CHARMAP to UTF-8 file
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write_header_charmap(OUTFILE)
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process_charmap(UNICODE_DATA_LINES, OUTFILE)
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OUTFILE.write("END CHARMAP\n\n")
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# Processing EastAsianWidth.txt and write WIDTH to UTF-8 file
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write_header_width(OUTFILE, ARGS.unicode_version)
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process_width(OUTFILE,
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UNICODE_DATA_LINES,
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EAST_ASIAN_WIDTH_LINES,
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PROP_LIST_LINES)
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OUTFILE.write("END WIDTH\n")
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