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GH-96172 fix unicodedata.east_asian_width being wrong on unassigned code points (#96207)

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Carl Friedrich Bolz-Tereick 2022-08-26 18:29:39 +02:00 • committed by GitHub
parent c1581a928c
commit 9c197bc8bf
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4 changed files with 686 additions and 620 deletions
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32
Tools/unicode/makeunicodedata.py
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@ -77,7 +77,8 @@
"PDF", "EN", "ES", "ET", "AN", "CS", "NSM", "BN", "B", "S", "WS",
"ON", "LRI", "RLI", "FSI", "PDI" ]
EASTASIANWIDTH_NAMES = [ "F", "H", "W", "Na", "A", "N" ]
# "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" ]
@ -135,6 +136,14 @@ def maketables(trace=0):
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}
@ -160,12 +169,20 @@ def makeunicodedata(unicode, trace):
category, combining, bidirectional, mirrored, eastasianwidth,
normalizationquickcheck
)
# 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
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
@ -1085,6 +1102,7 @@ def __init__(self, version, cjk_check=True):
for i in range(0, 0x110000):
if table[i] is not None:
table[i].east_asian_width = widths[i]
self.widths = widths
for char, (p,) in UcdFile(DERIVED_CORE_PROPERTIES, version).expanded():
if table[char]: