528 lines
22 KiB
Python
528 lines
22 KiB
Python
# Utilities to generate Unicode data for glibc from upstream Unicode data.
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#
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# Copyright (C) 2014-2022 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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'''
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This module contains utilities used by the scripts to generate
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Unicode data for glibc from upstream Unicode data files.
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'''
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import sys
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import re
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# Common locale header.
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COMMENT_HEADER = """
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% This file is part of the GNU C Library and contains locale data.
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% The Free Software Foundation does not claim any copyright interest
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% in the locale data contained in this file. The foregoing does not
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% affect the license of the GNU C Library as a whole. It does not
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% exempt you from the conditions of the license if your use would
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% otherwise be governed by that license.
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"""
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# Dictionary holding the entire contents of the UnicodeData.txt file
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#
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# Contents of this dictionary look like this:
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#
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# {0: {'category': 'Cc',
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# 'title': None,
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# 'digit': '',
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# 'name': '<control>',
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# 'bidi': 'BN',
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# 'combining': '0',
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# 'comment': '',
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# 'oldname': 'NULL',
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# 'decomposition': '',
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# 'upper': None,
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# 'mirrored': 'N',
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# 'lower': None,
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# 'decdigit': '',
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# 'numeric': ''},
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# …
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# }
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UNICODE_ATTRIBUTES = {}
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# Dictionary holding the entire contents of the DerivedCoreProperties.txt file
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#
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# Contents of this dictionary look like this:
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#
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# {917504: ['Default_Ignorable_Code_Point'],
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# 917505: ['Case_Ignorable', 'Default_Ignorable_Code_Point'],
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# …
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# }
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DERIVED_CORE_PROPERTIES = {}
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# Dictionary holding the entire contents of the EastAsianWidths.txt file
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#
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# Contents of this dictionary look like this:
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#
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# {0: 'N', … , 45430: 'W', …}
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EAST_ASIAN_WIDTHS = {}
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def fill_attribute(code_point, fields):
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'''Stores in UNICODE_ATTRIBUTES[code_point] the values from the fields.
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One entry in the UNICODE_ATTRIBUTES dictionary represents one line
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in the UnicodeData.txt file.
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'''
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UNICODE_ATTRIBUTES[code_point] = {
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'name': fields[1], # Character name
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'category': fields[2], # General category
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'combining': fields[3], # Canonical combining classes
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'bidi': fields[4], # Bidirectional category
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'decomposition': fields[5], # Character decomposition mapping
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'decdigit': fields[6], # Decimal digit value
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'digit': fields[7], # Digit value
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'numeric': fields[8], # Numeric value
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'mirrored': fields[9], # mirrored
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'oldname': fields[10], # Old Unicode 1.0 name
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'comment': fields[11], # comment
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# Uppercase mapping
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'upper': int(fields[12], 16) if fields[12] else None,
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# Lowercase mapping
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'lower': int(fields[13], 16) if fields[13] else None,
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# Titlecase mapping
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'title': int(fields[14], 16) if fields[14] else None,
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}
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def fill_attributes(filename):
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'''Stores the entire contents of the UnicodeData.txt file
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in the UNICODE_ATTRIBUTES dictionary.
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A typical line for a single code point in UnicodeData.txt looks
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like this:
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0041;LATIN CAPITAL LETTER A;Lu;0;L;;;;;N;;;;0061;
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Code point ranges are indicated by pairs of lines like this:
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4E00;<CJK Ideograph, First>;Lo;0;L;;;;;N;;;;;
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9FCC;<CJK Ideograph, Last>;Lo;0;L;;;;;N;;;;;
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'''
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with open(filename, mode='r') as unicode_data_file:
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fields_start = []
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for line in unicode_data_file:
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fields = line.strip().split(';')
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if len(fields) != 15:
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sys.stderr.write(
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'short line in file "%(f)s": %(l)s\n' %{
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'f': filename, 'l': line})
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exit(1)
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if fields[2] == 'Cs':
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# Surrogates are UTF-16 artefacts,
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# not real characters. Ignore them.
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fields_start = []
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continue
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if fields[1].endswith(', First>'):
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fields_start = fields
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fields_start[1] = fields_start[1].split(',')[0][1:]
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continue
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if fields[1].endswith(', Last>'):
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fields[1] = fields[1].split(',')[0][1:]
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if fields[1:] != fields_start[1:]:
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sys.stderr.write(
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'broken code point range in file "%(f)s": %(l)s\n' %{
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'f': filename, 'l': line})
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exit(1)
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for code_point in range(
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int(fields_start[0], 16),
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int(fields[0], 16)+1):
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fill_attribute(code_point, fields)
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fields_start = []
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continue
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fill_attribute(int(fields[0], 16), fields)
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fields_start = []
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def fill_derived_core_properties(filename):
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'''Stores the entire contents of the DerivedCoreProperties.txt file
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in the DERIVED_CORE_PROPERTIES dictionary.
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Lines in DerivedCoreProperties.txt are either a code point range like
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this:
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0061..007A ; Lowercase # L& [26] LATIN SMALL LETTER A..LATIN SMALL LETTER Z
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or a single code point like this:
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00AA ; Lowercase # Lo FEMININE ORDINAL INDICATOR
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'''
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with open(filename, mode='r') as derived_core_properties_file:
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for line in derived_core_properties_file:
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match = re.match(
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r'^(?P<codepoint1>[0-9A-F]{4,6})'
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+ r'(?:\.\.(?P<codepoint2>[0-9A-F]{4,6}))?'
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+ r'\s*;\s*(?P<property>[a-zA-Z_]+)',
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line)
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if not match:
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continue
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start = match.group('codepoint1')
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end = match.group('codepoint2')
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if not end:
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end = start
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for code_point in range(int(start, 16), int(end, 16)+1):
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prop = match.group('property')
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if code_point in DERIVED_CORE_PROPERTIES:
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DERIVED_CORE_PROPERTIES[code_point].append(prop)
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else:
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DERIVED_CORE_PROPERTIES[code_point] = [prop]
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def fill_east_asian_widths(filename):
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'''Stores the entire contents of the EastAsianWidths.txt file
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in the EAST_ASIAN_WIDTHS dictionary.
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Lines in EastAsianWidths.txt are either a code point range like
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this:
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9FCD..9FFF;W # Cn [51] <reserved-9FCD>..<reserved-9FFF>
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or a single code point like this:
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A015;W # Lm YI SYLLABLE WU
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'''
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with open(filename, mode='r') as east_asian_widths_file:
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for line in east_asian_widths_file:
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match = re.match(
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r'^(?P<codepoint1>[0-9A-F]{4,6})'
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+r'(?:\.\.(?P<codepoint2>[0-9A-F]{4,6}))?'
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+r'\s*;\s*(?P<property>[a-zA-Z]+)',
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line)
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if not match:
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continue
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start = match.group('codepoint1')
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end = match.group('codepoint2')
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if not end:
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end = start
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for code_point in range(int(start, 16), int(end, 16)+1):
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EAST_ASIAN_WIDTHS[code_point] = match.group('property')
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def to_upper(code_point):
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'''Returns the code point of the uppercase version
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of the given code point'''
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if (UNICODE_ATTRIBUTES[code_point]['name']
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and UNICODE_ATTRIBUTES[code_point]['upper']):
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return UNICODE_ATTRIBUTES[code_point]['upper']
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else:
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return code_point
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def to_lower(code_point):
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'''Returns the code point of the lowercase version
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of the given code point'''
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if (UNICODE_ATTRIBUTES[code_point]['name']
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and UNICODE_ATTRIBUTES[code_point]['lower']):
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return UNICODE_ATTRIBUTES[code_point]['lower']
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else:
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return code_point
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def to_upper_turkish(code_point):
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'''Returns the code point of the Turkish uppercase version
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of the given code point'''
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if code_point == 0x0069:
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return 0x0130
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return to_upper(code_point)
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def to_lower_turkish(code_point):
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'''Returns the code point of the Turkish lowercase version
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of the given code point'''
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if code_point == 0x0049:
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return 0x0131
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return to_lower(code_point)
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def to_title(code_point):
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'''Returns the code point of the titlecase version
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of the given code point'''
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if (UNICODE_ATTRIBUTES[code_point]['name']
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and UNICODE_ATTRIBUTES[code_point]['title']):
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return UNICODE_ATTRIBUTES[code_point]['title']
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else:
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return code_point
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def is_upper(code_point):
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'''Checks whether the character with this code point is uppercase'''
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return (to_lower(code_point) != code_point
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or (code_point in DERIVED_CORE_PROPERTIES
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and 'Uppercase' in DERIVED_CORE_PROPERTIES[code_point]))
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def is_lower(code_point):
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'''Checks whether the character with this code point is lowercase'''
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# Some characters are defined as “Lowercase” in
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# DerivedCoreProperties.txt but do not have a mapping to upper
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# case. For example, ꜰ U+A72F “LATIN LETTER SMALL CAPITAL F” is
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# one of these.
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return (to_upper(code_point) != code_point
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# <U00DF> is lowercase, but without simple to_upper mapping.
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or code_point == 0x00DF
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or (code_point in DERIVED_CORE_PROPERTIES
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and 'Lowercase' in DERIVED_CORE_PROPERTIES[code_point]))
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def is_alpha(code_point):
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'''Checks whether the character with this code point is alphabetic'''
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return ((code_point in DERIVED_CORE_PROPERTIES
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and
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'Alphabetic' in DERIVED_CORE_PROPERTIES[code_point])
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or
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# Consider all the non-ASCII digits as alphabetic.
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# ISO C 99 forbids us to have them in category “digit”,
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# but we want iswalnum to return true on them.
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(UNICODE_ATTRIBUTES[code_point]['category'] == 'Nd'
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and not (code_point >= 0x0030 and code_point <= 0x0039)))
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def is_digit(code_point):
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'''Checks whether the character with this code point is a digit'''
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if False:
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return (UNICODE_ATTRIBUTES[code_point]['name']
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and UNICODE_ATTRIBUTES[code_point]['category'] == 'Nd')
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# Note: U+0BE7..U+0BEF and U+1369..U+1371 are digit systems without
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# a zero. Must add <0> in front of them by hand.
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else:
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# SUSV2 gives us some freedom for the "digit" category, but ISO C 99
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# takes it away:
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# 7.25.2.1.5:
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# The iswdigit function tests for any wide character that
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# corresponds to a decimal-digit character (as defined in 5.2.1).
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# 5.2.1:
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# the 10 decimal digits 0 1 2 3 4 5 6 7 8 9
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return (code_point >= 0x0030 and code_point <= 0x0039)
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def is_outdigit(code_point):
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'''Checks whether the character with this code point is outdigit'''
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return (code_point >= 0x0030 and code_point <= 0x0039)
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def is_blank(code_point):
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'''Checks whether the character with this code point is blank'''
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return (code_point == 0x0009 # '\t'
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# Category Zs without mention of '<noBreak>'
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or (UNICODE_ATTRIBUTES[code_point]['name']
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and UNICODE_ATTRIBUTES[code_point]['category'] == 'Zs'
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and '<noBreak>' not in
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UNICODE_ATTRIBUTES[code_point]['decomposition']))
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def is_space(code_point):
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'''Checks whether the character with this code point is a space'''
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# Don’t make U+00A0 a space. Non-breaking space means that all programs
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# should treat it like a punctuation character, not like a space.
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return (code_point == 0x0020 # ' '
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or code_point == 0x000C # '\f'
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or code_point == 0x000A # '\n'
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or code_point == 0x000D # '\r'
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or code_point == 0x0009 # '\t'
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or code_point == 0x000B # '\v'
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# Categories Zl, Zp, and Zs without mention of "<noBreak>"
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or (UNICODE_ATTRIBUTES[code_point]['name']
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and
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(UNICODE_ATTRIBUTES[code_point]['category'] in ['Zl', 'Zp']
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or
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(UNICODE_ATTRIBUTES[code_point]['category'] in ['Zs']
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and
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'<noBreak>' not in
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UNICODE_ATTRIBUTES[code_point]['decomposition']))))
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def is_cntrl(code_point):
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'''Checks whether the character with this code point is
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a control character'''
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return (UNICODE_ATTRIBUTES[code_point]['name']
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and (UNICODE_ATTRIBUTES[code_point]['name'] == '<control>'
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or
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UNICODE_ATTRIBUTES[code_point]['category'] in ['Zl', 'Zp']))
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def is_xdigit(code_point):
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'''Checks whether the character with this code point is
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a hexadecimal digit'''
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if False:
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return (is_digit(code_point)
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or (code_point >= 0x0041 and code_point <= 0x0046)
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or (code_point >= 0x0061 and code_point <= 0x0066))
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else:
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# SUSV2 gives us some freedom for the "xdigit" category, but ISO C 99
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# takes it away:
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# 7.25.2.1.12:
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# The iswxdigit function tests for any wide character that
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# corresponds to a hexadecimal-digit character (as defined
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# in 6.4.4.1).
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# 6.4.4.1:
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# hexadecimal-digit: one of
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# 0 1 2 3 4 5 6 7 8 9 a b c d e f A B C D E F
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return ((code_point >= 0x0030 and code_point <= 0x0039)
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or (code_point >= 0x0041 and code_point <= 0x0046)
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or (code_point >= 0x0061 and code_point <= 0x0066))
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def is_graph(code_point):
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'''Checks whether the character with this code point is
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a graphical character'''
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return (UNICODE_ATTRIBUTES[code_point]['name']
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and UNICODE_ATTRIBUTES[code_point]['name'] != '<control>'
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and not is_space(code_point))
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def is_print(code_point):
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'''Checks whether the character with this code point is printable'''
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return (UNICODE_ATTRIBUTES[code_point]['name']
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and UNICODE_ATTRIBUTES[code_point]['name'] != '<control>'
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and UNICODE_ATTRIBUTES[code_point]['category'] not in ['Zl', 'Zp'])
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def is_punct(code_point):
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'''Checks whether the character with this code point is punctuation'''
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if False:
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return (UNICODE_ATTRIBUTES[code_point]['name']
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and UNICODE_ATTRIBUTES[code_point]['category'].startswith('P'))
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else:
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# The traditional POSIX definition of punctuation is every graphic,
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# non-alphanumeric character.
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return (is_graph(code_point)
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and not is_alpha(code_point)
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and not is_digit(code_point))
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def is_combining(code_point):
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'''Checks whether the character with this code point is
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a combining character'''
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# Up to Unicode 3.0.1 we took the Combining property from the PropList.txt
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# file. In 3.0.1 it was identical to the union of the general categories
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# "Mn", "Mc", "Me". In Unicode 3.1 this property has been dropped from the
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# PropList.txt file, so we take the latter definition.
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return (UNICODE_ATTRIBUTES[code_point]['name']
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and
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UNICODE_ATTRIBUTES[code_point]['category'] in ['Mn', 'Mc', 'Me'])
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def is_combining_level3(code_point):
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'''Checks whether the character with this code point is
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a combining level3 character'''
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return (is_combining(code_point)
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and
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int(UNICODE_ATTRIBUTES[code_point]['combining']) in range(0, 200))
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def ucs_symbol(code_point):
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'''Return the UCS symbol string for a Unicode character.'''
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if code_point < 0x10000:
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return '<U{:04X}>'.format(code_point)
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else:
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return '<U{:08X}>'.format(code_point)
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def ucs_symbol_range(code_point_low, code_point_high):
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'''Returns a string UCS symbol string for a code point range.
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Example:
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<U0041>..<U005A>
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'''
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return ucs_symbol(code_point_low) + '..' + ucs_symbol(code_point_high)
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def verifications():
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'''Tests whether the is_* functions observe the known restrictions'''
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for code_point in sorted(UNICODE_ATTRIBUTES):
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# toupper restriction: "Only characters specified for the keywords
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# lower and upper shall be specified.
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if (to_upper(code_point) != code_point
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and not (is_lower(code_point) or is_upper(code_point))):
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sys.stderr.write(
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('%(sym)s is not upper|lower '
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+ 'but toupper(0x%(c)04X) = 0x%(uc)04X\n') %{
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'sym': ucs_symbol(code_point),
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'c': code_point,
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'uc': to_upper(code_point)})
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# tolower restriction: "Only characters specified for the keywords
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# lower and upper shall be specified.
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if (to_lower(code_point) != code_point
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and not (is_lower(code_point) or is_upper(code_point))):
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sys.stderr.write(
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('%(sym)s is not upper|lower '
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+ 'but tolower(0x%(c)04X) = 0x%(uc)04X\n') %{
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'sym': ucs_symbol(code_point),
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'c': code_point,
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'uc': to_lower(code_point)})
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# alpha restriction: "Characters classified as either upper or lower
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# shall automatically belong to this class.
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if ((is_lower(code_point) or is_upper(code_point))
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and not is_alpha(code_point)):
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sys.stderr.write('%(sym)s is upper|lower but not alpha\n' %{
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'sym': ucs_symbol(code_point)})
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# alpha restriction: “No character specified for the keywords cntrl,
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# digit, punct or space shall be specified.”
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if (is_alpha(code_point) and is_cntrl(code_point)):
|
||
sys.stderr.write('%(sym)s is alpha and cntrl\n' %{
|
||
'sym': ucs_symbol(code_point)})
|
||
if (is_alpha(code_point) and is_digit(code_point)):
|
||
sys.stderr.write('%(sym)s is alpha and digit\n' %{
|
||
'sym': ucs_symbol(code_point)})
|
||
if (is_alpha(code_point) and is_punct(code_point)):
|
||
sys.stderr.write('%(sym)s is alpha and punct\n' %{
|
||
'sym': ucs_symbol(code_point)})
|
||
if (is_alpha(code_point) and is_space(code_point)):
|
||
sys.stderr.write('%(sym)s is alpha and space\n' %{
|
||
'sym': ucs_symbol(code_point)})
|
||
# space restriction: “No character specified for the keywords upper,
|
||
# lower, alpha, digit, graph or xdigit shall be specified.”
|
||
# upper, lower, alpha already checked above.
|
||
if (is_space(code_point) and is_digit(code_point)):
|
||
sys.stderr.write('%(sym)s is space and digit\n' %{
|
||
'sym': ucs_symbol(code_point)})
|
||
if (is_space(code_point) and is_graph(code_point)):
|
||
sys.stderr.write('%(sym)s is space and graph\n' %{
|
||
'sym': ucs_symbol(code_point)})
|
||
if (is_space(code_point) and is_xdigit(code_point)):
|
||
sys.stderr.write('%(sym)s is space and xdigit\n' %{
|
||
'sym': ucs_symbol(code_point)})
|
||
# cntrl restriction: “No character specified for the keywords upper,
|
||
# lower, alpha, digit, punct, graph, print or xdigit shall be
|
||
# specified.” upper, lower, alpha already checked above.
|
||
if (is_cntrl(code_point) and is_digit(code_point)):
|
||
sys.stderr.write('%(sym)s is cntrl and digit\n' %{
|
||
'sym': ucs_symbol(code_point)})
|
||
if (is_cntrl(code_point) and is_punct(code_point)):
|
||
sys.stderr.write('%(sym)s is cntrl and punct\n' %{
|
||
'sym': ucs_symbol(code_point)})
|
||
if (is_cntrl(code_point) and is_graph(code_point)):
|
||
sys.stderr.write('%(sym)s is cntrl and graph\n' %{
|
||
'sym': ucs_symbol(code_point)})
|
||
if (is_cntrl(code_point) and is_print(code_point)):
|
||
sys.stderr.write('%(sym)s is cntrl and print\n' %{
|
||
'sym': ucs_symbol(code_point)})
|
||
if (is_cntrl(code_point) and is_xdigit(code_point)):
|
||
sys.stderr.write('%(sym)s is cntrl and xdigit\n' %{
|
||
'sym': ucs_symbol(code_point)})
|
||
# punct restriction: “No character specified for the keywords upper,
|
||
# lower, alpha, digit, cntrl, xdigit or as the <space> character shall
|
||
# be specified.” upper, lower, alpha, cntrl already checked above.
|
||
if (is_punct(code_point) and is_digit(code_point)):
|
||
sys.stderr.write('%(sym)s is punct and digit\n' %{
|
||
'sym': ucs_symbol(code_point)})
|
||
if (is_punct(code_point) and is_xdigit(code_point)):
|
||
sys.stderr.write('%(sym)s is punct and xdigit\n' %{
|
||
'sym': ucs_symbol(code_point)})
|
||
if (is_punct(code_point) and code_point == 0x0020):
|
||
sys.stderr.write('%(sym)s is punct\n' %{
|
||
'sym': ucs_symbol(code_point)})
|
||
# graph restriction: “No character specified for the keyword cntrl
|
||
# shall be specified.” Already checked above.
|
||
|
||
# print restriction: “No character specified for the keyword cntrl
|
||
# shall be specified.” Already checked above.
|
||
|
||
# graph - print relation: differ only in the <space> character.
|
||
# How is this possible if there are more than one space character?!
|
||
# I think susv2/xbd/locale.html should speak of “space characters”,
|
||
# not “space character”.
|
||
if (is_print(code_point)
|
||
and not (is_graph(code_point) or is_space(code_point))):
|
||
sys.stderr.write('%(sym)s is print but not graph|<space>\n' %{
|
||
'sym': unicode_utils.ucs_symbol(code_point)})
|
||
if (not is_print(code_point)
|
||
and (is_graph(code_point) or code_point == 0x0020)):
|
||
sys.stderr.write('%(sym)s is graph|<space> but not print\n' %{
|
||
'sym': unicode_utils.ucs_symbol(code_point)})
|