#!/usr/bin/python3 # -*- coding: utf-8 -*- # # Generate a translit_cjk_compat file from a UnicodeData file. # Copyright (C) 2015-2023 Free Software Foundation, Inc. # This file is part of the GNU C Library. # # The GNU C Library is free software; you can redistribute it and/or # modify it under the terms of the GNU Lesser General Public # License as published by the Free Software Foundation; either # version 2.1 of the License, or (at your option) any later version. # # The GNU C Library is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU # Lesser General Public License for more details. # # You should have received a copy of the GNU Lesser General Public # License along with the GNU C Library; if not, see # . ''' Generate a translit_cjk_compat file from UnicodeData.txt To see how this script is used, call it with the “-h” option: $ ./gen_translit_cjk_compat -h … prints usage message … ''' import argparse import time import sys import unicode_utils def read_input_file(filename): '''Reads the original glibc translit_cjk_compat file to get the original head and tail. We want to replace only the part of the file between “translit_start” and “translit_end” ''' head = tail = '' with open(filename, mode='r') as translit_file: for line in translit_file: head = head + line if line.startswith('translit_start'): break for line in translit_file: if line.startswith('translit_end'): tail = line break for line in translit_file: tail = tail + line return (head, tail) def output_head(translit_file, unicode_version, head=''): '''Write the header of the output file, i.e. the part of the file before the “translit_start” line. ''' if ARGS.input_file and head: translit_file.write(head) else: translit_file.write('escape_char /\n') translit_file.write('comment_char %\n') translit_file.write(unicode_utils.COMMENT_HEADER) translit_file.write('\n') translit_file.write('% Transliterations of CJK compatibility ') translit_file.write('characters.\n') translit_file.write('% Generated automatically from UnicodeData.txt ' + 'by gen_translit_cjk_compat.py ' + 'on {:s} '.format(time.strftime('%Y-%m-%d')) + 'for Unicode {:s}.\n'.format(unicode_version)) translit_file.write('\n') translit_file.write('LC_CTYPE\n') translit_file.write('\n') translit_file.write('translit_start\n') def output_tail(translit_file, tail=''): '''Write the tail of the output file''' if ARGS.input_file and tail: translit_file.write(tail) else: translit_file.write('translit_end\n') translit_file.write('\n') translit_file.write('END LC_CTYPE\n') def special_decompose(code_point_list): ''' Decompositions which are not in UnicodeData.txt at all but which were used in the original translit_cjk_compat file in glibc and which seem to make sense. I want to keep the update of translit_cjk_compat close to the spirit of the original file, therefore I added this special decomposition rules here. ''' special_decompose_dict = { (0x2215,): [0x002F], # ∕ → / (0x00B2,): [0x005E, 0x0032], # ² → ^2 (0x03BC,): [0x00B5], # μ → µ (GREEK SMALL LETTER MU → MICRO SIGN) (0x2113,): [0x006C], # ℓ → l (0x00B3,): [0x005E, 0x0033], # ³ → ^3 (0x00B5,): [0x0075], # µ → u (0x03BC, 0x2113): [0x03BC, 0x006C], # μℓ → μl (0x0072, 0x0061, 0x0064, 0x2215, 0x0073, 0x00B2): [ 0x0072, 0x0061, 0x0064, 0x002F, 0x0073, 0x00B2], (0x006D, 0x2215, 0x0073, 0x00B2): [0x006D, 0x002F, 0x0073, 0x00B2], } if tuple(code_point_list) in special_decompose_dict: return special_decompose_dict[tuple(code_point_list)] else: return code_point_list def output_transliteration(translit_file): '''Write the new transliteration to the output file''' translit_file.write('\n') for code_point in sorted(unicode_utils.UNICODE_ATTRIBUTES): name = unicode_utils.UNICODE_ATTRIBUTES[code_point]['name'] decomposition = unicode_utils.UNICODE_ATTRIBUTES[ code_point]['decomposition'] if decomposition.startswith(''): decomposition = decomposition[9:] decomposed_code_points = [[int(x, 16) for x in decomposition.split(' ')]] if decomposed_code_points[0]: while True: special_decomposed_code_points = special_decompose( decomposed_code_points[-1]) if (special_decomposed_code_points != decomposed_code_points[-1]): decomposed_code_points.append( special_decomposed_code_points) continue special_decomposed_code_points = [] for decomposed_code_point in decomposed_code_points[-1]: special_decomposed_code_points += special_decompose( [decomposed_code_point]) if (special_decomposed_code_points == decomposed_code_points[-1]): break decomposed_code_points.append( special_decomposed_code_points) translit_file.write('% {:s}\n'.format(name)) translit_file.write('{:s} '.format( unicode_utils.ucs_symbol(code_point))) for index in range(0, len(decomposed_code_points)): if index > 0: translit_file.write(';') if len(decomposed_code_points[index]) > 1: translit_file.write('"') for decomposed_code_point in decomposed_code_points[index]: translit_file.write('{:s}'.format( unicode_utils.ucs_symbol(decomposed_code_point))) if len(decomposed_code_points[index]) > 1: translit_file.write('"') translit_file.write('\n') for code_point in sorted(unicode_utils.UNICODE_ATTRIBUTES): name = unicode_utils.UNICODE_ATTRIBUTES[code_point]['name'] decomposition = unicode_utils.UNICODE_ATTRIBUTES[ code_point]['decomposition'] if decomposition and name.startswith('CJK COMPATIBILITY IDEOGRAPH'): decomposed_code_points = [int(x, 16) for x in decomposition.split(' ')] if len(decomposed_code_points) != 1: sys.stderr.write( 'Unexpected decomposition length {:x} {:s} {:s}\n'.format( code_point, name, decomposition)) exit(1) translit_file.write('% {:s}\n'.format(name)) translit_file.write('{:s} '.format( unicode_utils.ucs_symbol(code_point))) for decomposed_code_point in decomposed_code_points: translit_file.write('{:s}'.format( unicode_utils.ucs_symbol(decomposed_code_point))) translit_file.write('\n') translit_file.write('\n') if __name__ == "__main__": PARSER = argparse.ArgumentParser( description=''' Generate a translit_cjk_compat file from UnicodeData.txt. ''') PARSER.add_argument( '-u', '--unicode_data_file', nargs='?', type=str, default='UnicodeData.txt', help=('The UnicodeData.txt file to read, ' + 'default: %(default)s')) PARSER.add_argument( '-i', '--input_file', nargs='?', type=str, help=''' The original glibc/localedata/locales/translit_cjk_compat file.''') PARSER.add_argument( '-o', '--output_file', nargs='?', type=str, default='translit_cjk_compat.new', help='''The new translit_cjk_compat file, default: %(default)s. If the original glibc/localedata/locales/translit_cjk_compat 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)