diff options
Diffstat (limited to 'localedata/unicode-gen/gen_translit_fraction.py')
| -rw-r--r-- | localedata/unicode-gen/gen_translit_fraction.py | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/localedata/unicode-gen/gen_translit_fraction.py b/localedata/unicode-gen/gen_translit_fraction.py new file mode 100644 index 0000000000..5bf63ea344 --- /dev/null +++ b/localedata/unicode-gen/gen_translit_fraction.py @@ -0,0 +1,197 @@ +#!/usr/bin/python3 +# -*- coding: utf-8 -*- +# +# Generate a translit_fraction file from a UnicodeData file. +# Copyright (C) 2015 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 +# <http://www.gnu.org/licenses/>. + +''' +Generate a translit_fraction file from UnicodeData.txt + +To see how this script is used, call it with the “-h” option: + + $ ./gen_translit_fraction -h + … prints usage message … +''' + +import argparse +import time +import unicode_utils + +def read_input_file(filename): + '''Reads the original glibc translit_fraction 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('\n') + translit_file.write('% Transliterations of fractions.\n') + translit_file.write('% Generated automatically from UnicodeData.txt ' + + 'by gen_translit_fraction.py ' + + 'on {:s} '.format(time.strftime('%Y-%m-%d')) + + 'for Unicode {:s}.\n'.format(unicode_version)) + translit_file.write('% The replacements have been surrounded ') + translit_file.write('with spaces, because fractions are\n') + translit_file.write('% often preceded by a decimal number and ') + translit_file.write('followed by a unit or a math symbol.\n') + 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_fraction file in glibc and + which seem to make sense. I want to keep the update of + translit_fraction close to the spirit of the original file, + therefore I added this special decomposition rules here. + ''' + special_decompose_dict = { + (0x2044,): [0x002F], # ⁄ → / + } + 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('<fraction>'): + decomposition = decomposition[11:] + decomposed_code_points = [[int(x, 16) + for x in decomposition.split(' ')]] + if decomposed_code_points[0]: + decomposed_code_points[0] = [0x0020] \ + + decomposed_code_points[0] \ + + [0x0020] + 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') + 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_fraction + file.''') + PARSER.add_argument( + '-o', '--output_file', + nargs='?', + type=str, + default='translit_fraction.new', + help='''The new translit_fraction file, default: %(default)s. If the + original glibc/localedata/locales/translit_fraction 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) |