# Utilities to generate Unicode data for glibc from upstream Unicode data. # # Copyright (C) 2014-2021 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 # . ''' This module contains utilities used by the scripts to generate Unicode data for glibc from upstream Unicode data files. ''' import sys import re # Common locale header. COMMENT_HEADER = """ % This file is part of the GNU C Library and contains locale data. % The Free Software Foundation does not claim any copyright interest % in the locale data contained in this file. The foregoing does not % affect the license of the GNU C Library as a whole. It does not % exempt you from the conditions of the license if your use would % otherwise be governed by that license. """ # Dictionary holding the entire contents of the UnicodeData.txt file # # Contents of this dictionary look like this: # # {0: {'category': 'Cc', # 'title': None, # 'digit': '', # 'name': '', # 'bidi': 'BN', # 'combining': '0', # 'comment': '', # 'oldname': 'NULL', # 'decomposition': '', # 'upper': None, # 'mirrored': 'N', # 'lower': None, # 'decdigit': '', # 'numeric': ''}, # … # } UNICODE_ATTRIBUTES = {} # Dictionary holding the entire contents of the DerivedCoreProperties.txt file # # Contents of this dictionary look like this: # # {917504: ['Default_Ignorable_Code_Point'], # 917505: ['Case_Ignorable', 'Default_Ignorable_Code_Point'], # … # } DERIVED_CORE_PROPERTIES = {} # Dictionary holding the entire contents of the EastAsianWidths.txt file # # Contents of this dictionary look like this: # # {0: 'N', … , 45430: 'W', …} EAST_ASIAN_WIDTHS = {} def fill_attribute(code_point, fields): '''Stores in UNICODE_ATTRIBUTES[code_point] the values from the fields. One entry in the UNICODE_ATTRIBUTES dictionary represents one line in the UnicodeData.txt file. ''' UNICODE_ATTRIBUTES[code_point] = { 'name': fields[1], # Character name 'category': fields[2], # General category 'combining': fields[3], # Canonical combining classes 'bidi': fields[4], # Bidirectional category 'decomposition': fields[5], # Character decomposition mapping 'decdigit': fields[6], # Decimal digit value 'digit': fields[7], # Digit value 'numeric': fields[8], # Numeric value 'mirrored': fields[9], # mirrored 'oldname': fields[10], # Old Unicode 1.0 name 'comment': fields[11], # comment # Uppercase mapping 'upper': int(fields[12], 16) if fields[12] else None, # Lowercase mapping 'lower': int(fields[13], 16) if fields[13] else None, # Titlecase mapping 'title': int(fields[14], 16) if fields[14] else None, } def fill_attributes(filename): '''Stores the entire contents of the UnicodeData.txt file in the UNICODE_ATTRIBUTES dictionary. A typical line for a single code point in UnicodeData.txt looks like this: 0041;LATIN CAPITAL LETTER A;Lu;0;L;;;;;N;;;;0061; Code point ranges are indicated by pairs of lines like this: 4E00;;Lo;0;L;;;;;N;;;;; 9FCC;;Lo;0;L;;;;;N;;;;; ''' with open(filename, mode='r') as unicode_data_file: fields_start = [] for line in unicode_data_file: fields = line.strip().split(';') if len(fields) != 15: sys.stderr.write( 'short line in file "%(f)s": %(l)s\n' %{ 'f': filename, 'l': line}) exit(1) if fields[2] == 'Cs': # Surrogates are UTF-16 artefacts, # not real characters. Ignore them. fields_start = [] continue if fields[1].endswith(', First>'): fields_start = fields fields_start[1] = fields_start[1].split(',')[0][1:] continue if fields[1].endswith(', Last>'): fields[1] = fields[1].split(',')[0][1:] if fields[1:] != fields_start[1:]: sys.stderr.write( 'broken code point range in file "%(f)s": %(l)s\n' %{ 'f': filename, 'l': line}) exit(1) for code_point in range( int(fields_start[0], 16), int(fields[0], 16)+1): fill_attribute(code_point, fields) fields_start = [] continue fill_attribute(int(fields[0], 16), fields) fields_start = [] def fill_derived_core_properties(filename): '''Stores the entire contents of the DerivedCoreProperties.txt file in the DERIVED_CORE_PROPERTIES dictionary. Lines in DerivedCoreProperties.txt are either a code point range like this: 0061..007A ; Lowercase # L& [26] LATIN SMALL LETTER A..LATIN SMALL LETTER Z or a single code point like this: 00AA ; Lowercase # Lo FEMININE ORDINAL INDICATOR ''' with open(filename, mode='r') as derived_core_properties_file: for line in derived_core_properties_file: match = re.match( r'^(?P[0-9A-F]{4,6})' + r'(?:\.\.(?P[0-9A-F]{4,6}))?' + r'\s*;\s*(?P[a-zA-Z_]+)', line) if not match: continue start = match.group('codepoint1') end = match.group('codepoint2') if not end: end = start for code_point in range(int(start, 16), int(end, 16)+1): prop = match.group('property') if code_point in DERIVED_CORE_PROPERTIES: DERIVED_CORE_PROPERTIES[code_point].append(prop) else: DERIVED_CORE_PROPERTIES[code_point] = [prop] def fill_east_asian_widths(filename): '''Stores the entire contents of the EastAsianWidths.txt file in the EAST_ASIAN_WIDTHS dictionary. Lines in EastAsianWidths.txt are either a code point range like this: 9FCD..9FFF;W # Cn [51] .. or a single code point like this: A015;W # Lm YI SYLLABLE WU ''' with open(filename, mode='r') as east_asian_widths_file: for line in east_asian_widths_file: match = re.match( r'^(?P[0-9A-F]{4,6})' +r'(?:\.\.(?P[0-9A-F]{4,6}))?' +r'\s*;\s*(?P[a-zA-Z]+)', line) if not match: continue start = match.group('codepoint1') end = match.group('codepoint2') if not end: end = start for code_point in range(int(start, 16), int(end, 16)+1): EAST_ASIAN_WIDTHS[code_point] = match.group('property') def to_upper(code_point): '''Returns the code point of the uppercase version of the given code point''' if (UNICODE_ATTRIBUTES[code_point]['name'] and UNICODE_ATTRIBUTES[code_point]['upper']): return UNICODE_ATTRIBUTES[code_point]['upper'] else: return code_point def to_lower(code_point): '''Returns the code point of the lowercase version of the given code point''' if (UNICODE_ATTRIBUTES[code_point]['name'] and UNICODE_ATTRIBUTES[code_point]['lower']): return UNICODE_ATTRIBUTES[code_point]['lower'] else: return code_point def to_upper_turkish(code_point): '''Returns the code point of the Turkish uppercase version of the given code point''' if code_point == 0x0069: return 0x0130 return to_upper(code_point) def to_lower_turkish(code_point): '''Returns the code point of the Turkish lowercase version of the given code point''' if code_point == 0x0049: return 0x0131 return to_lower(code_point) def to_title(code_point): '''Returns the code point of the titlecase version of the given code point''' if (UNICODE_ATTRIBUTES[code_point]['name'] and UNICODE_ATTRIBUTES[code_point]['title']): return UNICODE_ATTRIBUTES[code_point]['title'] else: return code_point def is_upper(code_point): '''Checks whether the character with this code point is uppercase''' return (to_lower(code_point) != code_point or (code_point in DERIVED_CORE_PROPERTIES and 'Uppercase' in DERIVED_CORE_PROPERTIES[code_point])) def is_lower(code_point): '''Checks whether the character with this code point is lowercase''' # Some characters are defined as “Lowercase” in # DerivedCoreProperties.txt but do not have a mapping to upper # case. For example, ꜰ U+A72F “LATIN LETTER SMALL CAPITAL F” is # one of these. return (to_upper(code_point) != code_point # is lowercase, but without simple to_upper mapping. or code_point == 0x00DF or (code_point in DERIVED_CORE_PROPERTIES and 'Lowercase' in DERIVED_CORE_PROPERTIES[code_point])) def is_alpha(code_point): '''Checks whether the character with this code point is alphabetic''' return ((code_point in DERIVED_CORE_PROPERTIES and 'Alphabetic' in DERIVED_CORE_PROPERTIES[code_point]) or # Consider all the non-ASCII digits as alphabetic. # ISO C 99 forbids us to have them in category “digit”, # but we want iswalnum to return true on them. (UNICODE_ATTRIBUTES[code_point]['category'] == 'Nd' and not (code_point >= 0x0030 and code_point <= 0x0039))) def is_digit(code_point): '''Checks whether the character with this code point is a digit''' if False: return (UNICODE_ATTRIBUTES[code_point]['name'] and UNICODE_ATTRIBUTES[code_point]['category'] == 'Nd') # Note: U+0BE7..U+0BEF and U+1369..U+1371 are digit systems without # a zero. Must add <0> in front of them by hand. else: # SUSV2 gives us some freedom for the "digit" category, but ISO C 99 # takes it away: # 7.25.2.1.5: # The iswdigit function tests for any wide character that # corresponds to a decimal-digit character (as defined in 5.2.1). # 5.2.1: # the 10 decimal digits 0 1 2 3 4 5 6 7 8 9 return (code_point >= 0x0030 and code_point <= 0x0039) def is_outdigit(code_point): '''Checks whether the character with this code point is outdigit''' return (code_point >= 0x0030 and code_point <= 0x0039) def is_blank(code_point): '''Checks whether the character with this code point is blank''' return (code_point == 0x0009 # '\t' # Category Zs without mention of '' or (UNICODE_ATTRIBUTES[code_point]['name'] and UNICODE_ATTRIBUTES[code_point]['category'] == 'Zs' and '' not in UNICODE_ATTRIBUTES[code_point]['decomposition'])) def is_space(code_point): '''Checks whether the character with this code point is a space''' # Don’t make U+00A0 a space. Non-breaking space means that all programs # should treat it like a punctuation character, not like a space. return (code_point == 0x0020 # ' ' or code_point == 0x000C # '\f' or code_point == 0x000A # '\n' or code_point == 0x000D # '\r' or code_point == 0x0009 # '\t' or code_point == 0x000B # '\v' # Categories Zl, Zp, and Zs without mention of "" or (UNICODE_ATTRIBUTES[code_point]['name'] and (UNICODE_ATTRIBUTES[code_point]['category'] in ['Zl', 'Zp'] or (UNICODE_ATTRIBUTES[code_point]['category'] in ['Zs'] and '' not in UNICODE_ATTRIBUTES[code_point]['decomposition'])))) def is_cntrl(code_point): '''Checks whether the character with this code point is a control character''' return (UNICODE_ATTRIBUTES[code_point]['name'] and (UNICODE_ATTRIBUTES[code_point]['name'] == '' or UNICODE_ATTRIBUTES[code_point]['category'] in ['Zl', 'Zp'])) def is_xdigit(code_point): '''Checks whether the character with this code point is a hexadecimal digit''' if False: return (is_digit(code_point) or (code_point >= 0x0041 and code_point <= 0x0046) or (code_point >= 0x0061 and code_point <= 0x0066)) else: # SUSV2 gives us some freedom for the "xdigit" category, but ISO C 99 # takes it away: # 7.25.2.1.12: # The iswxdigit function tests for any wide character that # corresponds to a hexadecimal-digit character (as defined # in 6.4.4.1). # 6.4.4.1: # hexadecimal-digit: one of # 0 1 2 3 4 5 6 7 8 9 a b c d e f A B C D E F return ((code_point >= 0x0030 and code_point <= 0x0039) or (code_point >= 0x0041 and code_point <= 0x0046) or (code_point >= 0x0061 and code_point <= 0x0066)) def is_graph(code_point): '''Checks whether the character with this code point is a graphical character''' return (UNICODE_ATTRIBUTES[code_point]['name'] and UNICODE_ATTRIBUTES[code_point]['name'] != '' and not is_space(code_point)) def is_print(code_point): '''Checks whether the character with this code point is printable''' return (UNICODE_ATTRIBUTES[code_point]['name'] and UNICODE_ATTRIBUTES[code_point]['name'] != '' and UNICODE_ATTRIBUTES[code_point]['category'] not in ['Zl', 'Zp']) def is_punct(code_point): '''Checks whether the character with this code point is punctuation''' if False: return (UNICODE_ATTRIBUTES[code_point]['name'] and UNICODE_ATTRIBUTES[code_point]['category'].startswith('P')) else: # The traditional POSIX definition of punctuation is every graphic, # non-alphanumeric character. return (is_graph(code_point) and not is_alpha(code_point) and not is_digit(code_point)) def is_combining(code_point): '''Checks whether the character with this code point is a combining character''' # Up to Unicode 3.0.1 we took the Combining property from the PropList.txt # file. In 3.0.1 it was identical to the union of the general categories # "Mn", "Mc", "Me". In Unicode 3.1 this property has been dropped from the # PropList.txt file, so we take the latter definition. return (UNICODE_ATTRIBUTES[code_point]['name'] and UNICODE_ATTRIBUTES[code_point]['category'] in ['Mn', 'Mc', 'Me']) def is_combining_level3(code_point): '''Checks whether the character with this code point is a combining level3 character''' return (is_combining(code_point) and int(UNICODE_ATTRIBUTES[code_point]['combining']) in range(0, 200)) def ucs_symbol(code_point): '''Return the UCS symbol string for a Unicode character.''' if code_point < 0x10000: return ''.format(code_point) else: return ''.format(code_point) def ucs_symbol_range(code_point_low, code_point_high): '''Returns a string UCS symbol string for a code point range. Example: .. ''' return ucs_symbol(code_point_low) + '..' + ucs_symbol(code_point_high) def verifications(): '''Tests whether the is_* functions observe the known restrictions''' for code_point in sorted(UNICODE_ATTRIBUTES): # toupper restriction: "Only characters specified for the keywords # lower and upper shall be specified. if (to_upper(code_point) != code_point and not (is_lower(code_point) or is_upper(code_point))): sys.stderr.write( ('%(sym)s is not upper|lower ' + 'but toupper(0x%(c)04X) = 0x%(uc)04X\n') %{ 'sym': ucs_symbol(code_point), 'c': code_point, 'uc': to_upper(code_point)}) # tolower restriction: "Only characters specified for the keywords # lower and upper shall be specified. if (to_lower(code_point) != code_point and not (is_lower(code_point) or is_upper(code_point))): sys.stderr.write( ('%(sym)s is not upper|lower ' + 'but tolower(0x%(c)04X) = 0x%(uc)04X\n') %{ 'sym': ucs_symbol(code_point), 'c': code_point, 'uc': to_lower(code_point)}) # alpha restriction: "Characters classified as either upper or lower # shall automatically belong to this class. if ((is_lower(code_point) or is_upper(code_point)) and not is_alpha(code_point)): sys.stderr.write('%(sym)s is upper|lower but not alpha\n' %{ 'sym': ucs_symbol(code_point)}) # alpha restriction: “No character specified for the keywords cntrl, # digit, punct or space shall be specified.” 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 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 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|\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| but not print\n' %{ 'sym': unicode_utils.ucs_symbol(code_point)})