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makeunicodedata.py
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makeunicodedata.py
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#
# (re)generate unicode property and type databases
#
# This script converts Unicode database files to Modules/unicodedata_db.h,
# Modules/unicodename_db.h, and Objects/unicodetype_db.h
#
# history:
# 2000-09-24 fl created (based on bits and pieces from unidb)
# 2000-09-25 fl merged tim's splitbin fixes, separate decomposition table
# 2000-09-25 fl added character type table
# 2000-09-26 fl added LINEBREAK, DECIMAL, and DIGIT flags/fields (2.0)
# 2000-11-03 fl expand first/last ranges
# 2001-01-19 fl added character name tables (2.1)
# 2001-01-21 fl added decomp compression; dynamic phrasebook threshold
# 2002-09-11 wd use string methods
# 2002-10-18 mvl update to Unicode 3.2
# 2002-10-22 mvl generate NFC tables
# 2002-11-24 mvl expand all ranges, sort names version-independently
# 2002-11-25 mvl add UNIDATA_VERSION
# 2004-05-29 perky add east asian width information
# 2006-03-10 mvl update to Unicode 4.1; add UCD 3.2 delta
# 2008-06-11 gb add PRINTABLE_MASK for Atsuo Ishimoto's ascii() patch
# 2011-10-21 ezio add support for name aliases and named sequences
# 2012-01 benjamin add full case mappings
#
# written by Fredrik Lundh (fredrik@pythonware.com)
#
import dataclasses
import os
import sys
import zipfile
from functools import partial
from textwrap import dedent
from typing import Iterator, List, Optional, Set, Tuple
SCRIPT = sys.argv[0]
VERSION = "3.3"
# The Unicode Database
# --------------------
# When changing UCD version please update
# * Doc/library/stdtypes.rst, and
# * Doc/library/unicodedata.rst
# * Doc/reference/lexical_analysis.rst (two occurrences)
UNIDATA_VERSION = "15.1.0"
UNICODE_DATA = "UnicodeData%s.txt"
COMPOSITION_EXCLUSIONS = "CompositionExclusions%s.txt"
EASTASIAN_WIDTH = "EastAsianWidth%s.txt"
UNIHAN = "Unihan%s.zip"
DERIVED_CORE_PROPERTIES = "DerivedCoreProperties%s.txt"
DERIVEDNORMALIZATION_PROPS = "DerivedNormalizationProps%s.txt"
LINE_BREAK = "LineBreak%s.txt"
NAME_ALIASES = "NameAliases%s.txt"
NAMED_SEQUENCES = "NamedSequences%s.txt"
SPECIAL_CASING = "SpecialCasing%s.txt"
CASE_FOLDING = "CaseFolding%s.txt"
# Private Use Areas -- in planes 1, 15, 16
PUA_1 = range(0xE000, 0xF900)
PUA_15 = range(0xF0000, 0xFFFFE)
PUA_16 = range(0x100000, 0x10FFFE)
# we use this ranges of PUA_15 to store name aliases and named sequences
NAME_ALIASES_START = 0xF0000
NAMED_SEQUENCES_START = 0xF0200
old_versions = ["3.2.0"]
CATEGORY_NAMES = [ "Cn", "Lu", "Ll", "Lt", "Mn", "Mc", "Me", "Nd",
"Nl", "No", "Zs", "Zl", "Zp", "Cc", "Cf", "Cs", "Co", "Cn", "Lm",
"Lo", "Pc", "Pd", "Ps", "Pe", "Pi", "Pf", "Po", "Sm", "Sc", "Sk",
"So" ]
BIDIRECTIONAL_NAMES = [ "", "L", "LRE", "LRO", "R", "AL", "RLE", "RLO",
"PDF", "EN", "ES", "ET", "AN", "CS", "NSM", "BN", "B", "S", "WS",
"ON", "LRI", "RLI", "FSI", "PDI" ]
# "N" needs to be the first entry, see the comment in makeunicodedata
EASTASIANWIDTH_NAMES = [ "N", "H", "W", "Na", "A", "F" ]
MANDATORY_LINE_BREAKS = [ "BK", "CR", "LF", "NL" ]
# note: should match definitions in Objects/unicodectype.c
ALPHA_MASK = 0x01
DECIMAL_MASK = 0x02
DIGIT_MASK = 0x04
LOWER_MASK = 0x08
LINEBREAK_MASK = 0x10
SPACE_MASK = 0x20
TITLE_MASK = 0x40
UPPER_MASK = 0x80
XID_START_MASK = 0x100
XID_CONTINUE_MASK = 0x200
PRINTABLE_MASK = 0x400
NUMERIC_MASK = 0x800
CASE_IGNORABLE_MASK = 0x1000
CASED_MASK = 0x2000
EXTENDED_CASE_MASK = 0x4000
# these ranges need to match unicodedata.c:is_unified_ideograph
cjk_ranges = [
('3400', '4DBF'), # CJK Ideograph Extension A CJK
('4E00', '9FFF'), # CJK Ideograph
('20000', '2A6DF'), # CJK Ideograph Extension B
('2A700', '2B739'), # CJK Ideograph Extension C
('2B740', '2B81D'), # CJK Ideograph Extension D
('2B820', '2CEA1'), # CJK Ideograph Extension E
('2CEB0', '2EBE0'), # CJK Ideograph Extension F
('2EBF0', '2EE5D'), # CJK Ideograph Extension I
('30000', '3134A'), # CJK Ideograph Extension G
('31350', '323AF'), # CJK Ideograph Extension H
]
def maketables(trace=0):
print("--- Reading", UNICODE_DATA % "", "...")
unicode = UnicodeData(UNIDATA_VERSION)
print(len(list(filter(None, unicode.table))), "characters")
for version in old_versions:
print("--- Reading", UNICODE_DATA % ("-"+version), "...")
old_unicode = UnicodeData(version, cjk_check=False)
print(len(list(filter(None, old_unicode.table))), "characters")
merge_old_version(version, unicode, old_unicode)
makeunicodename(unicode, trace)
makeunicodedata(unicode, trace)
makeunicodetype(unicode, trace)
# --------------------------------------------------------------------
# unicode character properties
def makeunicodedata(unicode, trace):
# the default value of east_asian_width is "N", for unassigned code points
# not mentioned in EastAsianWidth.txt
# in addition there are some reserved but unassigned code points in CJK
# ranges that are classified as "W". code points in private use areas
# have a width of "A". both of these have entries in
# EastAsianWidth.txt
# see https://unicode.org/reports/tr11/#Unassigned
assert EASTASIANWIDTH_NAMES[0] == "N"
dummy = (0, 0, 0, 0, 0, 0)
table = [dummy]
cache = {0: dummy}
index = [0] * len(unicode.chars)
FILE = "Modules/unicodedata_db.h"
print("--- Preparing", FILE, "...")
# 1) database properties
for char in unicode.chars:
record = unicode.table[char]
if record:
# extract database properties
category = CATEGORY_NAMES.index(record.general_category)
combining = int(record.canonical_combining_class)
bidirectional = BIDIRECTIONAL_NAMES.index(record.bidi_class)
mirrored = record.bidi_mirrored == "Y"
eastasianwidth = EASTASIANWIDTH_NAMES.index(record.east_asian_width)
normalizationquickcheck = record.quick_check
item = (
category, combining, bidirectional, mirrored, eastasianwidth,
normalizationquickcheck
)
elif unicode.widths[char] is not None:
# an unassigned but reserved character, with a known
# east_asian_width
eastasianwidth = EASTASIANWIDTH_NAMES.index(unicode.widths[char])
item = (0, 0, 0, 0, eastasianwidth, 0)
else:
continue
# add entry to index and item tables
i = cache.get(item)
if i is None:
cache[item] = i = len(table)
table.append(item)
index[char] = i
# 2) decomposition data
decomp_data_cache = {}
decomp_data = [0]
decomp_prefix = [""]
decomp_index = [0] * len(unicode.chars)
decomp_size = 0
comp_pairs = []
comp_first = [None] * len(unicode.chars)
comp_last = [None] * len(unicode.chars)
for char in unicode.chars:
record = unicode.table[char]
if record:
if record.decomposition_type:
decomp = record.decomposition_type.split()
if len(decomp) > 19:
raise Exception("character %x has a decomposition too large for nfd_nfkd" % char)
# prefix
if decomp[0][0] == "<":
prefix = decomp.pop(0)
else:
prefix = ""
try:
i = decomp_prefix.index(prefix)
except ValueError:
i = len(decomp_prefix)
decomp_prefix.append(prefix)
prefix = i
assert prefix < 256
# content
decomp = [prefix + (len(decomp)<<8)] + [int(s, 16) for s in decomp]
# Collect NFC pairs
if not prefix and len(decomp) == 3 and \
char not in unicode.exclusions and \
unicode.table[decomp[1]].canonical_combining_class == "0":
p, l, r = decomp
comp_first[l] = 1
comp_last[r] = 1
comp_pairs.append((l,r,char))
key = tuple(decomp)
i = decomp_data_cache.get(key, -1)
if i == -1:
i = len(decomp_data)
decomp_data.extend(decomp)
decomp_size = decomp_size + len(decomp) * 2
decomp_data_cache[key] = i
else:
assert decomp_data[i:i+len(decomp)] == decomp
else:
i = 0
decomp_index[char] = i
f = l = 0
comp_first_ranges = []
comp_last_ranges = []
prev_f = prev_l = None
for i in unicode.chars:
if comp_first[i] is not None:
comp_first[i] = f
f += 1
if prev_f is None:
prev_f = (i,i)
elif prev_f[1]+1 == i:
prev_f = prev_f[0],i
else:
comp_first_ranges.append(prev_f)
prev_f = (i,i)
if comp_last[i] is not None:
comp_last[i] = l
l += 1
if prev_l is None:
prev_l = (i,i)
elif prev_l[1]+1 == i:
prev_l = prev_l[0],i
else:
comp_last_ranges.append(prev_l)
prev_l = (i,i)
comp_first_ranges.append(prev_f)
comp_last_ranges.append(prev_l)
total_first = f
total_last = l
comp_data = [0]*(total_first*total_last)
for f,l,char in comp_pairs:
f = comp_first[f]
l = comp_last[l]
comp_data[f*total_last+l] = char
print(len(table), "unique properties")
print(len(decomp_prefix), "unique decomposition prefixes")
print(len(decomp_data), "unique decomposition entries:", end=' ')
print(decomp_size, "bytes")
print(total_first, "first characters in NFC")
print(total_last, "last characters in NFC")
print(len(comp_pairs), "NFC pairs")
print("--- Writing", FILE, "...")
with open(FILE, "w") as fp:
fprint = partial(print, file=fp)
fprint("/* this file was generated by %s %s */" % (SCRIPT, VERSION))
fprint()
fprint('#define UNIDATA_VERSION "%s"' % UNIDATA_VERSION)
fprint("/* a list of unique database records */")
fprint("const _PyUnicode_DatabaseRecord _PyUnicode_Database_Records[] = {")
for item in table:
fprint(" {%d, %d, %d, %d, %d, %d}," % item)
fprint("};")
fprint()
fprint("/* Reindexing of NFC first characters. */")
fprint("#define TOTAL_FIRST",total_first)
fprint("#define TOTAL_LAST",total_last)
fprint("struct reindex{int start;short count,index;};")
fprint("static struct reindex nfc_first[] = {")
for start,end in comp_first_ranges:
fprint(" { %d, %d, %d}," % (start,end-start,comp_first[start]))
fprint(" {0,0,0}")
fprint("};\n")
fprint("static struct reindex nfc_last[] = {")
for start,end in comp_last_ranges:
fprint(" { %d, %d, %d}," % (start,end-start,comp_last[start]))
fprint(" {0,0,0}")
fprint("};\n")
# FIXME: <fl> the following tables could be made static, and
# the support code moved into unicodedatabase.c
fprint("/* string literals */")
fprint("const char *_PyUnicode_CategoryNames[] = {")
for name in CATEGORY_NAMES:
fprint(" \"%s\"," % name)
fprint(" NULL")
fprint("};")
fprint("const char *_PyUnicode_BidirectionalNames[] = {")
for name in BIDIRECTIONAL_NAMES:
fprint(" \"%s\"," % name)
fprint(" NULL")
fprint("};")
fprint("const char *_PyUnicode_EastAsianWidthNames[] = {")
for name in EASTASIANWIDTH_NAMES:
fprint(" \"%s\"," % name)
fprint(" NULL")
fprint("};")
fprint("static const char *decomp_prefix[] = {")
for name in decomp_prefix:
fprint(" \"%s\"," % name)
fprint(" NULL")
fprint("};")
# split record index table
index1, index2, shift = splitbins(index, trace)
fprint("/* index tables for the database records */")
fprint("#define SHIFT", shift)
Array("index1", index1).dump(fp, trace)
Array("index2", index2).dump(fp, trace)
# split decomposition index table
index1, index2, shift = splitbins(decomp_index, trace)
fprint("/* decomposition data */")
Array("decomp_data", decomp_data).dump(fp, trace)
fprint("/* index tables for the decomposition data */")
fprint("#define DECOMP_SHIFT", shift)
Array("decomp_index1", index1).dump(fp, trace)
Array("decomp_index2", index2).dump(fp, trace)
index, index2, shift = splitbins(comp_data, trace)
fprint("/* NFC pairs */")
fprint("#define COMP_SHIFT", shift)
Array("comp_index", index).dump(fp, trace)
Array("comp_data", index2).dump(fp, trace)
# Generate delta tables for old versions
for version, table, normalization in unicode.changed:
cversion = version.replace(".","_")
records = [table[0]]
cache = {table[0]:0}
index = [0] * len(table)
for i, record in enumerate(table):
try:
index[i] = cache[record]
except KeyError:
index[i] = cache[record] = len(records)
records.append(record)
index1, index2, shift = splitbins(index, trace)
fprint("static const change_record change_records_%s[] = {" % cversion)
for record in records:
fprint(" { %s }," % ", ".join(map(str,record)))
fprint("};")
Array("changes_%s_index" % cversion, index1).dump(fp, trace)
Array("changes_%s_data" % cversion, index2).dump(fp, trace)
fprint("static const change_record* get_change_%s(Py_UCS4 n)" % cversion)
fprint("{")
fprint(" int index;")
fprint(" if (n >= 0x110000) index = 0;")
fprint(" else {")
fprint(" index = changes_%s_index[n>>%d];" % (cversion, shift))
fprint(" index = changes_%s_data[(index<<%d)+(n & %d)];" % \
(cversion, shift, ((1<<shift)-1)))
fprint(" }")
fprint(" return change_records_%s+index;" % cversion)
fprint("}\n")
fprint("static Py_UCS4 normalization_%s(Py_UCS4 n)" % cversion)
fprint("{")
fprint(" switch(n) {")
for k, v in normalization:
fprint(" case %s: return 0x%s;" % (hex(k), v))
fprint(" default: return 0;")
fprint(" }\n}\n")
# --------------------------------------------------------------------
# unicode character type tables
def makeunicodetype(unicode, trace):
FILE = "Objects/unicodetype_db.h"
print("--- Preparing", FILE, "...")
# extract unicode types
dummy = (0, 0, 0, 0, 0, 0)
table = [dummy]
cache = {dummy: 0}
index = [0] * len(unicode.chars)
numeric = {}
spaces = []
linebreaks = []
extra_casing = []
for char in unicode.chars:
record = unicode.table[char]
if record:
# extract database properties
category = record.general_category
bidirectional = record.bidi_class
properties = record.binary_properties
flags = 0
if category in ["Lm", "Lt", "Lu", "Ll", "Lo"]:
flags |= ALPHA_MASK
if "Lowercase" in properties:
flags |= LOWER_MASK
if 'Line_Break' in properties or bidirectional == "B":
flags |= LINEBREAK_MASK
linebreaks.append(char)
if category == "Zs" or bidirectional in ("WS", "B", "S"):
flags |= SPACE_MASK
spaces.append(char)
if category == "Lt":
flags |= TITLE_MASK
if "Uppercase" in properties:
flags |= UPPER_MASK
if char == ord(" ") or category[0] not in ("C", "Z"):
flags |= PRINTABLE_MASK
if "XID_Start" in properties:
flags |= XID_START_MASK
if "XID_Continue" in properties:
flags |= XID_CONTINUE_MASK
if "Cased" in properties:
flags |= CASED_MASK
if "Case_Ignorable" in properties:
flags |= CASE_IGNORABLE_MASK
sc = unicode.special_casing.get(char)
cf = unicode.case_folding.get(char, [char])
if record.simple_uppercase_mapping:
upper = int(record.simple_uppercase_mapping, 16)
else:
upper = char
if record.simple_lowercase_mapping:
lower = int(record.simple_lowercase_mapping, 16)
else:
lower = char
if record.simple_titlecase_mapping:
title = int(record.simple_titlecase_mapping, 16)
else:
title = upper
if sc is None and cf != [lower]:
sc = ([lower], [title], [upper])
if sc is None:
if upper == lower == title:
upper = lower = title = 0
else:
upper = upper - char
lower = lower - char
title = title - char
assert (abs(upper) <= 2147483647 and
abs(lower) <= 2147483647 and
abs(title) <= 2147483647)
else:
# This happens either when some character maps to more than one
# character in uppercase, lowercase, or titlecase or the
# casefolded version of the character is different from the
# lowercase. The extra characters are stored in a different
# array.
flags |= EXTENDED_CASE_MASK
lower = len(extra_casing) | (len(sc[0]) << 24)
extra_casing.extend(sc[0])
if cf != sc[0]:
lower |= len(cf) << 20
extra_casing.extend(cf)
upper = len(extra_casing) | (len(sc[2]) << 24)
extra_casing.extend(sc[2])
# Title is probably equal to upper.
if sc[1] == sc[2]:
title = upper
else:
title = len(extra_casing) | (len(sc[1]) << 24)
extra_casing.extend(sc[1])
# decimal digit, integer digit
decimal = 0
if record.decomposition_mapping:
flags |= DECIMAL_MASK
decimal = int(record.decomposition_mapping)
digit = 0
if record.numeric_type:
flags |= DIGIT_MASK
digit = int(record.numeric_type)
if record.numeric_value:
flags |= NUMERIC_MASK
numeric.setdefault(record.numeric_value, []).append(char)
item = (
upper, lower, title, decimal, digit, flags
)
# add entry to index and item tables
i = cache.get(item)
if i is None:
cache[item] = i = len(table)
table.append(item)
index[char] = i
print(len(table), "unique character type entries")
print(sum(map(len, numeric.values())), "numeric code points")
print(len(spaces), "whitespace code points")
print(len(linebreaks), "linebreak code points")
print(len(extra_casing), "extended case array")
print("--- Writing", FILE, "...")
with open(FILE, "w") as fp:
fprint = partial(print, file=fp)
fprint("/* this file was generated by %s %s */" % (SCRIPT, VERSION))
fprint()
fprint("/* a list of unique character type descriptors */")
fprint("const _PyUnicode_TypeRecord _PyUnicode_TypeRecords[] = {")
for item in table:
fprint(" {%d, %d, %d, %d, %d, %d}," % item)
fprint("};")
fprint()
fprint("/* extended case mappings */")
fprint()
fprint("const Py_UCS4 _PyUnicode_ExtendedCase[] = {")
for c in extra_casing:
fprint(" %d," % c)
fprint("};")
fprint()
# split decomposition index table
index1, index2, shift = splitbins(index, trace)
fprint("/* type indexes */")
fprint("#define SHIFT", shift)
Array("index1", index1).dump(fp, trace)
Array("index2", index2).dump(fp, trace)
# Generate code for _PyUnicode_ToNumeric()
numeric_items = sorted(numeric.items())
fprint('/* Returns the numeric value as double for Unicode characters')
fprint(' * having this property, -1.0 otherwise.')
fprint(' */')
fprint('double _PyUnicode_ToNumeric(Py_UCS4 ch)')
fprint('{')
fprint(' switch (ch) {')
for value, codepoints in numeric_items:
# Turn text into float literals
parts = value.split('/')
parts = [repr(float(part)) for part in parts]
value = '/'.join(parts)
codepoints.sort()
for codepoint in codepoints:
fprint(' case 0x%04X:' % (codepoint,))
fprint(' return (double) %s;' % (value,))
fprint(' }')
fprint(' return -1.0;')
fprint('}')
fprint()
# Generate code for _PyUnicode_IsWhitespace()
fprint("/* Returns 1 for Unicode characters having the bidirectional")
fprint(" * type 'WS', 'B' or 'S' or the category 'Zs', 0 otherwise.")
fprint(" */")
fprint('int _PyUnicode_IsWhitespace(const Py_UCS4 ch)')
fprint('{')
fprint(' switch (ch) {')
for codepoint in sorted(spaces):
fprint(' case 0x%04X:' % (codepoint,))
fprint(' return 1;')
fprint(' }')
fprint(' return 0;')
fprint('}')
fprint()
# Generate code for _PyUnicode_IsLinebreak()
fprint("/* Returns 1 for Unicode characters having the line break")
fprint(" * property 'BK', 'CR', 'LF' or 'NL' or having bidirectional")
fprint(" * type 'B', 0 otherwise.")
fprint(" */")
fprint('int _PyUnicode_IsLinebreak(const Py_UCS4 ch)')
fprint('{')
fprint(' switch (ch) {')
for codepoint in sorted(linebreaks):
fprint(' case 0x%04X:' % (codepoint,))
fprint(' return 1;')
fprint(' }')
fprint(' return 0;')
fprint('}')
fprint()
# --------------------------------------------------------------------
# unicode name database
def makeunicodename(unicode, trace):
from dawg import build_compression_dawg
FILE = "Modules/unicodename_db.h"
print("--- Preparing", FILE, "...")
# unicode name hash table
# extract names
data = []
for char in unicode.chars:
record = unicode.table[char]
if record:
name = record.name.strip()
if name and name[0] != "<":
data.append((name, char))
print("--- Writing", FILE, "...")
with open(FILE, "w") as fp:
fprint = partial(print, file=fp)
fprint("/* this file was generated by %s %s */" % (SCRIPT, VERSION))
fprint()
fprint("#define NAME_MAXLEN", 256)
assert max(len(x) for x in data) < 256
fprint()
fprint("/* name->code dictionary */")
packed_dawg, pos_to_codepoint = build_compression_dawg(data)
notfound = len(pos_to_codepoint)
inverse_list = [notfound] * len(unicode.chars)
for pos, codepoint in enumerate(pos_to_codepoint):
inverse_list[codepoint] = pos
Array("packed_name_dawg", list(packed_dawg)).dump(fp, trace)
Array("dawg_pos_to_codepoint", pos_to_codepoint).dump(fp, trace)
index1, index2, shift = splitbins(inverse_list, trace)
fprint("#define DAWG_CODEPOINT_TO_POS_SHIFT", shift)
fprint("#define DAWG_CODEPOINT_TO_POS_NOTFOUND", notfound)
Array("dawg_codepoint_to_pos_index1", index1).dump(fp, trace)
Array("dawg_codepoint_to_pos_index2", index2).dump(fp, trace)
fprint()
fprint('static const unsigned int aliases_start = %#x;' %
NAME_ALIASES_START)
fprint('static const unsigned int aliases_end = %#x;' %
(NAME_ALIASES_START + len(unicode.aliases)))
fprint('static const unsigned int name_aliases[] = {')
for name, codepoint in unicode.aliases:
fprint(' 0x%04X,' % codepoint)
fprint('};')
# In Unicode 6.0.0, the sequences contain at most 4 BMP chars,
# so we are using Py_UCS2 seq[4]. This needs to be updated if longer
# sequences or sequences with non-BMP chars are added.
# unicodedata_lookup should be adapted too.
fprint(dedent("""
typedef struct NamedSequence {
int seqlen;
Py_UCS2 seq[4];
} named_sequence;
"""))
fprint('static const unsigned int named_sequences_start = %#x;' %
NAMED_SEQUENCES_START)
fprint('static const unsigned int named_sequences_end = %#x;' %
(NAMED_SEQUENCES_START + len(unicode.named_sequences)))
fprint('static const named_sequence named_sequences[] = {')
for name, sequence in unicode.named_sequences:
seq_str = ', '.join('0x%04X' % cp for cp in sequence)
fprint(' {%d, {%s}},' % (len(sequence), seq_str))
fprint('};')
def merge_old_version(version, new, old):
# Changes to exclusion file not implemented yet
if old.exclusions != new.exclusions:
raise NotImplementedError("exclusions differ")
# In these change records, 0xFF means "no change"
bidir_changes = [0xFF]*0x110000
category_changes = [0xFF]*0x110000
decimal_changes = [0xFF]*0x110000
mirrored_changes = [0xFF]*0x110000
east_asian_width_changes = [0xFF]*0x110000
# In numeric data, 0 means "no change",
# -1 means "did not have a numeric value
numeric_changes = [0] * 0x110000
# normalization_changes is a list of key-value pairs
normalization_changes = []
for i in range(0x110000):
if new.table[i] is None:
# Characters unassigned in the new version ought to
# be unassigned in the old one
assert old.table[i] is None
continue
# check characters unassigned in the old version
if old.table[i] is None:
# category 0 is "unassigned"
category_changes[i] = 0
continue
# check characters that differ
if old.table[i] != new.table[i]:
for k, field in enumerate(dataclasses.fields(UcdRecord)):
value = getattr(old.table[i], field.name)
new_value = getattr(new.table[i], field.name)
if value != new_value:
if k == 1 and i in PUA_15:
# the name is not set in the old.table, but in the
# new.table we are using it for aliases and named seq
assert value == ''
elif k == 2:
category_changes[i] = CATEGORY_NAMES.index(value)
elif k == 4:
bidir_changes[i] = BIDIRECTIONAL_NAMES.index(value)
elif k == 5:
# We assume that all normalization changes are in 1:1 mappings
assert " " not in value
normalization_changes.append((i, value))
elif k == 6:
# we only support changes where the old value is a single digit
assert value in "0123456789"
decimal_changes[i] = int(value)
elif k == 8:
# Since 0 encodes "no change", the old value is better not 0
if not value:
numeric_changes[i] = -1
else:
numeric_changes[i] = float(value)
assert numeric_changes[i] not in (0, -1)
elif k == 9:
if value == 'Y':
mirrored_changes[i] = '1'
else:
mirrored_changes[i] = '0'
elif k == 11:
# change to ISO comment, ignore
pass
elif k == 12:
# change to simple uppercase mapping; ignore
pass
elif k == 13:
# change to simple lowercase mapping; ignore
pass
elif k == 14:
# change to simple titlecase mapping; ignore
pass
elif k == 15:
# change to east asian width
east_asian_width_changes[i] = EASTASIANWIDTH_NAMES.index(value)
elif k == 16:
# derived property changes; not yet
pass
elif k == 17:
# normalization quickchecks are not performed
# for older versions
pass
else:
class Difference(Exception):pass
raise Difference(hex(i), k, old.table[i], new.table[i])
new.changed.append((version, list(zip(bidir_changes, category_changes,
decimal_changes, mirrored_changes,
east_asian_width_changes,
numeric_changes)),
normalization_changes))
DATA_DIR = os.path.join('Tools', 'unicode', 'data')
def open_data(template, version):
local = os.path.join(DATA_DIR, template % ('-'+version,))
if not os.path.exists(local):
import urllib.request
if version == '3.2.0':
# irregular url structure
url = ('https://www.unicode.org/Public/3.2-Update/'+template) % ('-'+version,)
else:
url = ('https://www.unicode.org/Public/%s/ucd/'+template) % (version, '')
os.makedirs(DATA_DIR, exist_ok=True)
urllib.request.urlretrieve(url, filename=local)
if local.endswith('.txt'):
return open(local, encoding='utf-8')
else:
# Unihan.zip
return open(local, 'rb')
def expand_range(char_range: str) -> Iterator[int]:
'''
Parses ranges of code points, as described in UAX #44:
https://www.unicode.org/reports/tr44/#Code_Point_Ranges
'''
if '..' in char_range:
first, last = [int(c, 16) for c in char_range.split('..')]
else:
first = last = int(char_range, 16)
for char in range(first, last+1):
yield char
class UcdFile:
'''
A file in the standard format of the UCD.
See: https://www.unicode.org/reports/tr44/#Format_Conventions
Note that, as described there, the Unihan data files have their
own separate format.
'''
def __init__(self, template: str, version: str) -> None:
self.template = template
self.version = version
def records(self) -> Iterator[List[str]]:
with open_data(self.template, self.version) as file:
for line in file:
line = line.split('#', 1)[0].strip()
if not line:
continue
yield [field.strip() for field in line.split(';')]
def __iter__(self) -> Iterator[List[str]]:
return self.records()
def expanded(self) -> Iterator[Tuple[int, List[str]]]:
for record in self.records():
char_range, rest = record[0], record[1:]
for char in expand_range(char_range):
yield char, rest
@dataclasses.dataclass
class UcdRecord:
# 15 fields from UnicodeData.txt . See:
# https://www.unicode.org/reports/tr44/#UnicodeData.txt
codepoint: str
name: str
general_category: str
canonical_combining_class: str
bidi_class: str
decomposition_type: str
decomposition_mapping: str
numeric_type: str
numeric_value: str
bidi_mirrored: str
unicode_1_name: str # obsolete
iso_comment: str # obsolete
simple_uppercase_mapping: str
simple_lowercase_mapping: str
simple_titlecase_mapping: str
# https://www.unicode.org/reports/tr44/#EastAsianWidth.txt
east_asian_width: Optional[str]
# Binary properties, as a set of those that are true.
# Taken from multiple files:
# https://www.unicode.org/reports/tr44/#DerivedCoreProperties.txt
# https://www.unicode.org/reports/tr44/#LineBreak.txt
binary_properties: Set[str]
# The Quick_Check properties related to normalization:
# https://www.unicode.org/reports/tr44/#Decompositions_and_Normalization
# We store them as a bitmask.
quick_check: int
def from_row(row: List[str]) -> UcdRecord:
return UcdRecord(*row, None, set(), 0)
# --------------------------------------------------------------------
# the following support code is taken from the unidb utilities
# Copyright (c) 1999-2000 by Secret Labs AB
# load a unicode-data file from disk
class UnicodeData:
# table: List[Optional[UcdRecord]] # index is codepoint; None means unassigned
def __init__(self, version, cjk_check=True):
self.changed = []
table = [None] * 0x110000
for s in UcdFile(UNICODE_DATA, version):
char = int(s[0], 16)
table[char] = from_row(s)
cjk_ranges_found = []
# expand first-last ranges
field = None
for i in range(0, 0x110000):
# The file UnicodeData.txt has its own distinct way of
# expressing ranges. See:
# https://www.unicode.org/reports/tr44/#Code_Point_Ranges
s = table[i]
if s:
if s.name[-6:] == "First>":
s.name = ""
field = dataclasses.astuple(s)[:15]
elif s.name[-5:] == "Last>":
if s.name.startswith("<CJK Ideograph"):
cjk_ranges_found.append((field[0],
s.codepoint))
s.name = ""
field = None
elif field:
table[i] = from_row(('%X' % i,) + field[1:])
if cjk_check and cjk_ranges != cjk_ranges_found:
raise ValueError("CJK ranges deviate: have %r" % cjk_ranges_found)
# public attributes
self.filename = UNICODE_DATA % ''
self.table = table
self.chars = list(range(0x110000)) # unicode 3.2
# check for name aliases and named sequences, see #12753
# aliases and named sequences are not in 3.2.0
if version != '3.2.0':
self.aliases = []
# store aliases in the Private Use Area 15, in range U+F0000..U+F00FF,
# in order to take advantage of the compression and lookup
# algorithms used for the other characters
pua_index = NAME_ALIASES_START
for char, name, abbrev in UcdFile(NAME_ALIASES, version):
char = int(char, 16)
self.aliases.append((name, char))
# also store the name in the PUA 1
self.table[pua_index].name = name
pua_index += 1
assert pua_index - NAME_ALIASES_START == len(self.aliases)
self.named_sequences = []
# store named sequences in the PUA 1, in range U+F0100..,
# in order to take advantage of the compression and lookup
# algorithms used for the other characters.
assert pua_index < NAMED_SEQUENCES_START
pua_index = NAMED_SEQUENCES_START
for name, chars in UcdFile(NAMED_SEQUENCES, version):
chars = tuple(int(char, 16) for char in chars.split())
# check that the structure defined in makeunicodename is OK
assert 2 <= len(chars) <= 4, "change the Py_UCS2 array size"
assert all(c <= 0xFFFF for c in chars), ("use Py_UCS4 in "
"the NamedSequence struct and in unicodedata_lookup")
self.named_sequences.append((name, chars))
# also store these in the PUA 1
self.table[pua_index].name = name
pua_index += 1
assert pua_index - NAMED_SEQUENCES_START == len(self.named_sequences)
self.exclusions = {}
for char, in UcdFile(COMPOSITION_EXCLUSIONS, version):
char = int(char, 16)
self.exclusions[char] = 1
widths = [None] * 0x110000
for char, (width,) in UcdFile(EASTASIAN_WIDTH, version).expanded():
widths[char] = width
for i in range(0, 0x110000):
if table[i] is not None:
table[i].east_asian_width = widths[i]
self.widths = widths
for char, (propname, *propinfo) in UcdFile(DERIVED_CORE_PROPERTIES, version).expanded():
if propinfo:
# this is not a binary property, ignore it
continue
if table[char]:
# Some properties (e.g. Default_Ignorable_Code_Point)
# apply to unassigned code points; ignore them