mirror of
https://sourceware.org/git/glibc.git
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446 lines
19 KiB
Python
446 lines
19 KiB
Python
#!/usr/bin/python3
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# -*- coding: utf-8 -*-
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#
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# Generate a translit_combining file from a UnicodeData file.
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# Copyright (C) 2015-2017 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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# <http://www.gnu.org/licenses/>.
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'''
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Generate a translit_combining file from UnicodeData.txt
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To see how this script is used, call it with the “-h” option:
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$ ./gen_translit_combining -h
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… prints usage message …
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'''
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import argparse
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import time
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import unicode_utils
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def read_input_file(filename):
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'''Reads the original glibc translit_combining file to get the
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original head and tail.
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We want to replace only the part of the file between
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“translit_start” and “translit_end”
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'''
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head = tail = ''
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with open(filename, mode='r') as translit_file:
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for line in translit_file:
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head = head + line
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if line.startswith('translit_start'):
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break
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for line in translit_file:
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if line.startswith('translit_end'):
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tail = line
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break
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for line in translit_file:
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tail = tail + line
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return (head, tail)
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def output_head(translit_file, unicode_version, head=''):
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'''Write the header of the output file, i.e. the part of the file
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before the “translit_start” line.
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'''
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if ARGS.input_file and head:
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translit_file.write(head)
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else:
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translit_file.write('escape_char /\n')
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translit_file.write('comment_char %\n')
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translit_file.write(unicode_utils.COMMENT_HEADER)
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translit_file.write('\n')
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translit_file.write('% Transliterations that remove all ')
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translit_file.write('combining characters (accents,\n')
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translit_file.write('% pronounciation marks, etc.).\n')
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translit_file.write('% Generated automatically from UnicodeData.txt '
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+ 'by gen_translit_combining.py '
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+ 'on {:s} '.format(time.strftime('%Y-%m-%d'))
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+ 'for Unicode {:s}.\n'.format(unicode_version))
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translit_file.write('\n')
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translit_file.write('LC_CTYPE\n')
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translit_file.write('\n')
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translit_file.write('translit_start\n')
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def output_tail(translit_file, tail=''):
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'''Write the tail of the output file'''
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if ARGS.input_file and tail:
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translit_file.write(tail)
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else:
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translit_file.write('translit_end\n')
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translit_file.write('\n')
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translit_file.write('END LC_CTYPE\n')
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def is_combining_remove(code_point):
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'''Check whether this is a combining character which should be listed
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in the section of the translit_combining file where combining
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characters are replaced by empty strings.
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We ignore combining characters from many scripts here because
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the original translit_combining file didn’t do this for the
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combining characters from these scripts either and I am not
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sure yet whether this would be useful to do for all combining
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characters or not. For the moment I think it is better to keep
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close to the spirit of the original file.
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'''
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if not unicode_utils.is_combining(code_point):
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return False
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name = unicode_utils.UNICODE_ATTRIBUTES[code_point]['name']
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for substring in ('DEVANAGARI',
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'BENGALI',
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'CYRILLIC',
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'SYRIAC',
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'THAANA',
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'NKO',
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'GURMUKHI',
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'TAMIL',
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'GUJARATI',
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'ORIYA',
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'TELUGU',
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'KANNADA',
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'MALAYALAM',
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'SINHALA',
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'THAI',
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'LAO',
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'TIBETAN',
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'MYANMAR',
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'ETHIOPIC',
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'TAGALOG',
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'HANUNOO',
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'BUHID',
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'TAGBANWA',
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'KHMER',
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'MONGOLIAN',
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'LIMBU',
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'NEW TAI LUE',
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'BUGINESE',
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'BALINESE',
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'SUNDANESE',
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'LEPCHA',
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'IDEOGRAPHIC',
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'HANGUL',
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'SYLOTI',
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'SAURASHTRA',
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'KAYAH',
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'REJANG',
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'CHAM',
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'VARIATION SELECTOR',
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'KHAROSHTHI',
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'MUSICAL SYMBOL',
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'SAMARITAN',
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'MANDAIC',
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'TAI THAM',
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'BATAK',
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'VEDIC',
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'COPTIC',
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'TIFINAGH',
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'BAMUM',
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'JAVANESE',
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'TAI VIET',
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'MEETEI',
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'MANICHAEAN',
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'BRAHMI',
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'KAITHI',
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'CHAKMA',
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'MAHAJANI',
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'SHARADA',
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'KHOJKI',
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'KHUDAWADI',
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'GRANTHA',
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'TIRHUTA',
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'SIDDHAM',
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'MODI VOWEL',
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'MODI SIGN',
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'TAKRI',
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'BASSA VAH',
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'PAHAWH HMONG',
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'MIAO',
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'DUPLOYAN',
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'MENDE KIKAKUI',
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'AHOM',
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'SIGNWRITING'
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):
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if substring in name:
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return False
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return True
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def canonical_decompose(code_point):
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'''http://www.unicode.org/reports/tr44/#Character_Decomposition_Mappings
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In some instances a canonical mapping or a compatibility mapping
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may consist of a single character. For a canonical mapping, this
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indicates that the character is a canonical equivalent of another
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single character. For a compatibility mapping, this indicates that
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the character is a compatibility equivalent of another single
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character.
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A canonical mapping may also consist of a pair of characters, but
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is never longer than two characters. When a canonical mapping
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consists of a pair of characters, the first character may itself
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be a character with a decomposition mapping, but the second
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character never has a decomposition mapping.
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We ignore the canonical decomposition for code points
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matching certain substrings because the original translit_combining
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file didn’t include these types of characters either. I am unsure
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about the usefulness of including them and want to keep close
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to the spirit of the original file for the moment.
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'''
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name = unicode_utils.UNICODE_ATTRIBUTES[code_point]['name']
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for substring in ('MUSICAL SYMBOL',
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'CJK COMPATIBILITY IDEOGRAPH',
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'BALINESE',
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'KAITHI LETTER',
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'CHAKMA VOWEL',
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'GRANTHA VOWEL',
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'TIRHUTA VOWEL',
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'SIDDHAM VOWEL'):
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if substring in name:
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return []
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decomposition = unicode_utils.UNICODE_ATTRIBUTES[
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code_point]['decomposition']
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if decomposition and not decomposition.startswith('<'):
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decomposed_code_points = [int(x, 16) for x in decomposition.split(' ')]
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if decomposed_code_points:
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cd0 = canonical_decompose(decomposed_code_points[0])
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if cd0:
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decomposed_code_points = cd0 + decomposed_code_points[1:]
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return decomposed_code_points
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else:
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return []
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def special_decompose(code_point_list):
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'''
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Decompositions which are not canonical or which are not in
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UnicodeData.txt at all but some of these were used in the original
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translit_combining file in glibc and they seemed to make sense.
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I want to keep the update of translit_combining close to the
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spirit of the original file, therefore I added these special
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decomposition rules here.
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'''
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special_decompose_dict = {
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# Ø U+00D8 is already handled in translit_neutral. But
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# translit_combining is usually included after translit_neutral
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# and Ǿ U+01FE LATIN CAPITAL LETTER O WITH STROKE AND ACUTE
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# has a canonical decomposition to Ø U+00D8 and we want to
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# further decompose this to U+004F.
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(0x00D8,): [0x004F], # Ø → O
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# ø U+00F8 is already handled in translit_neutral. But
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# translit_combining is usually included after translit_neutral
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# and ǿ U+01FF LATIN SMALL LETTER O WITH STROKE AND ACUTE
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# has a canonical decomposition to ø U+00F8 and we want to
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# further decompose this to U+006F.
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(0x00F8,): [0x006F], # ø → o
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# æ U+00E6 is already in translit_compat because ligatures
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# are handled in translit_compat. But ǣ U+01E3 has a
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# canonical decomposition to U+00E6, U+0304 and we want to
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# further decompose this to “ae”.
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(0x00E6,): [0x0061, 0x0065], # æ → ae
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# Æ U+00C6 is already in translit_compat because ligatures
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# are handled in translit_compat. But Ǣ U+01E2 has a
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# canonical decomposition to U+00C6, U+0304 and we want to
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# further decompose this to “AE”
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(0x00C6,): [0x0041, 0x0045], # Æ → AE
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# U+05F2 HEBREW LIGATURE YIDDISH DOUBLE YOD is already in
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# translit_compat because ligatures are handled in translit_compat.
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# But U+FB1F has a canonical decomposition to U+05F2 and
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# we want to further decompose this to U+05D9, U+05D9.
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(0x05F2,): [0x05D9, 0x05D9], # ײ → יי
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# 0x2002 has a <compat> decomposition to 0x0020 in UnicodeData.txt
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# But U+2000 EN QUAD has a canonical decomposition U+2002
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# and we want to further decompose this to U+0020.
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(0x2002,): [0x0020], # EN SPACE → SPACE
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# 0x2003 has a <compat> decomposition to 0x0020 in UnicodeData.txt
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# But U+2001 EM QUAD has a canonical decomposition to U+2003
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# and we want to further decompose this to U+0020.
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(0x2003,): [0x0020], # EM SPACE → SPACE
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# U+2260 ≠ has the canonical decomposition U+003D U+0338
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# (= followed by ̸). After stripping the combining characters,
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# the result is only = which reverses the meaning.
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# Therefore, we add a special rules here for such mathematical
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# negations:
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(0x21AE,): [0x0021, 0x003C, 0x002D, 0x003E], # ↮ → !<->
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(0x21CD,): [0x0021, 0x003C, 0x003D], # ⇍ → !<=
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(0x21CE,): [0x0021, 0x003C, 0x003D, 0x003E], # ⇎ → !<=>
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(0x21CF,): [0x0021, 0x003D, 0x003E], # ⇏ → !=>
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(0x2204,): [0x0021, 0x2203], # ∄ → !∃
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(0x2209,): [0x0021, 0x2208], # ∉ → !∈
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(0x220C,): [0x0021, 0x220B], # ∌ → !∋
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(0x2224,): [0x0021, 0x2223], # ∤ → !∣
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(0x2226,): [0x0021, 0x2225], # ∦ → !∥
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(0x2241,): [0x0021, 0x007E], # ≁ → !~
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(0x2244,): [0x0021, 0x007E, 0x002D], # ≄ → !~-
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(0x2247,): [0x0021, 0x007E, 0x003D], # ≇ → !~=
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(0x2249,): [0x0021, 0x007E, 0x007E], # ≉ → !~~
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(0x2260,): [0x0021, 0x003D], # ≠ → !=
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(0x2262,): [0x0021, 0x003D, 0x003D], # ≢ → !==
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(0x226D,): [0x0021, 0x224D], # ≭ → !≍
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(0x226E,): [0x0021, 0x003C], # ≮ → !<
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(0x226F,): [0x0021, 0x003E], # ≯ → !>
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(0x2270,): [0x0021, 0x003C, 0x003D], # ≰ → !<=
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(0x2271,): [0x0021, 0x003E, 0x003D], # ≱ → !>=
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(0x2274,): [0x0021, 0x003C, 0x007E], # ≴ → !<~
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(0x2275,): [0x0021, 0x003E, 0x007E], # ≵ → !>~
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(0x2278,): [0x0021, 0x003C, 0x003E], # ≸ → !<>
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(0x2279,): [0x0021, 0x003E, 0x003C], # ≹ → !><
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(0x2280,): [0x0021, 0x227A], # ⊀ → !≺
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(0x2281,): [0x0021, 0x227B], # ⊁ → !≻
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(0x2284,): [0x0021, 0x2282], # ⊄ → !⊂
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(0x2285,): [0x0021, 0x2283], # ⊅ → !⊃
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(0x2288,): [0x0021, 0x2282, 0x003D], # ⊈ → !⊂=
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(0x2289,): [0x0021, 0x2283, 0x003D], # ⊉ → !⊃=
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(0x22AC,): [0x0021, 0x22A2], # ⊬ → !⊢
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(0x22AD,): [0x0021, 0x22A8], # ⊭ → !⊨
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(0x22AE,): [0x0021, 0x22A9], # ⊮ → !⊩
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(0x22AF,): [0x0021, 0x22AB], # ⊯ → !⊫
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(0x22E0,): [0x0021, 0x227C], # ⋠ → !≼
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(0x22E1,): [0x0021, 0x227D], # ⋡ → !≽
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(0x22E2,): [0x0021, 0x2291], # ⋢ → !⊑
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(0x22E3,): [0x0021, 0x2292], # ⋣ → !⊒
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(0x22EA,): [0x0021, 0x22B2], # ⋪ → !⊲
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(0x22EB,): [0x0021, 0x22B3], # ⋫ → !⊳
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(0x22EC,): [0x0021, 0x22B4], # ⋬ → !⊴
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(0x22ED,): [0x0021, 0x22B5], # ⋭ → !⊵
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(0x2ADC,): [0x0021, 0x2ADD], # ⫝̸ → !⫝
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# Special rule for 〈 U+3008 is added
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# because 〉 U+2329 has the canonical decomposition U+3008
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# and we want to further decompose this to > U+003C.
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(0x3008,): [0x003C], # 〈 → <
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# Special rule for 〉 U+3009 is added
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# because 〉 U+232A has the canonical decomposition U+3009
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# and we want to further decompose this to < U+003E.
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(0x3009,): [0x003E], # 〉→ >
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}
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if tuple(code_point_list) in special_decompose_dict:
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return special_decompose_dict[tuple(code_point_list)]
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else:
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return code_point_list
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def output_combining_remove(translit_file):
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'''Write the section of the translit_combining file where combining
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characters are replaced by empty strings.
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'''
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translit_file.write('\n')
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for code_point in sorted(unicode_utils.UNICODE_ATTRIBUTES):
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name = unicode_utils.UNICODE_ATTRIBUTES[code_point]['name']
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if is_combining_remove(code_point):
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translit_file.write('% {:s}\n'.format(name))
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translit_file.write('{:s} ""\n'.format(
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unicode_utils.ucs_symbol(code_point)))
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translit_file.write('\n')
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def output_decompositions(translit_file):
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'''Write the section of the translit_combining file where characters
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characters are decomposed and combining characters stripped from
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the decompositions.
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'''
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for code_point in sorted(unicode_utils.UNICODE_ATTRIBUTES):
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if special_decompose([code_point]) != [code_point]:
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decomposed_code_points = [special_decompose([code_point])]
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else:
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decomposed_code_points = [canonical_decompose(code_point)]
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if decomposed_code_points[0]:
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while True:
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special_decomposed_code_points = special_decompose(
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decomposed_code_points[-1])
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if (special_decomposed_code_points
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!= decomposed_code_points[-1]):
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decomposed_code_points.append(
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special_decomposed_code_points)
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continue
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special_decomposed_code_points = []
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for decomposed_code_point in decomposed_code_points[-1]:
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special_decomposed_code_points += special_decompose(
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[decomposed_code_point])
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if (special_decomposed_code_points
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== decomposed_code_points[-1]):
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break
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decomposed_code_points.append(
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special_decomposed_code_points)
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for index in range(0, len(decomposed_code_points)):
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decomposed_code_points[index] = [
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x for x in decomposed_code_points[index]
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if not is_combining_remove(x)]
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if decomposed_code_points[0]:
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translit_file.write('% {:s}\n'.format(
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unicode_utils.UNICODE_ATTRIBUTES[code_point]['name']))
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translit_file.write('{:s} '.format(
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unicode_utils.ucs_symbol(code_point)))
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for index in range(0, len(decomposed_code_points)):
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if index > 0:
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translit_file.write(';')
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if len(decomposed_code_points[index]) > 1:
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translit_file.write('"')
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for decomposed_code_point in decomposed_code_points[index]:
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translit_file.write('{:s}'.format(
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unicode_utils.ucs_symbol(decomposed_code_point)))
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if len(decomposed_code_points[index]) > 1:
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translit_file.write('"')
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translit_file.write('\n')
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translit_file.write('\n')
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def output_transliteration(translit_file):
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'''Write the new transliteration to the output file'''
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output_combining_remove(translit_file)
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output_decompositions(translit_file)
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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 translit_combining file from UnicodeData.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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'-i', '--input_file',
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nargs='?',
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type=str,
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help=''' The original glibc/localedata/locales/translit_combining
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file.''')
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PARSER.add_argument(
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'-o', '--output_file',
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nargs='?',
|
||
type=str,
|
||
default='translit_combining.new',
|
||
help='''The new translit_combining file, default: %(default)s. If the
|
||
original glibc/localedata/locales/translit_combining file has
|
||
been given as an option, the header up to the
|
||
“translit_start” line and the tail from the “translit_end”
|
||
line to the end of the file will be copied unchanged into the
|
||
output file. ''')
|
||
PARSER.add_argument(
|
||
'--unicode_version',
|
||
nargs='?',
|
||
required=True,
|
||
type=str,
|
||
help='The Unicode version of the input files used.')
|
||
ARGS = PARSER.parse_args()
|
||
|
||
unicode_utils.fill_attributes(ARGS.unicode_data_file)
|
||
HEAD = TAIL = ''
|
||
if ARGS.input_file:
|
||
(HEAD, TAIL) = read_input_file(ARGS.input_file)
|
||
with open(ARGS.output_file, mode='w') as TRANSLIT_FILE:
|
||
output_head(TRANSLIT_FILE, ARGS.unicode_version, head=HEAD)
|
||
output_transliteration(TRANSLIT_FILE)
|
||
output_tail(TRANSLIT_FILE, tail=TAIL)
|