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bpo-36311: Fixes decoding multibyte characters around chunk boundaries and improves decoding performance (GH-15083)

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Steve Dower 2019-08-21 16:22:33 -07:00 • committed by GitHub
parent df0c21ff46
commit 7ebdda0dbe
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3 changed files with 29 additions and 9 deletions
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20
Lib/test/test_codecs.py
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@ -3075,13 +3075,13 @@ def test_mbcs_alias(self):
self.assertEqual(codec.name, 'mbcs')
@support.bigmemtest(size=2**31, memuse=7, dry_run=False)
def test_large_input(self):
def test_large_input(self, size):
# Test input longer than INT_MAX.
# Input should contain undecodable bytes before and after
# the INT_MAX limit.
encoded = (b'01234567' * (2**28-1) +
encoded = (b'01234567' * ((size//8)-1) +
b'\x85\x86\xea\xeb\xec\xef\xfc\xfd\xfe\xff')
self.assertEqual(len(encoded), 2**31+2)
self.assertEqual(len(encoded), size+2)
decoded = codecs.code_page_decode(932, encoded, 'surrogateescape', True)
self.assertEqual(decoded[1], len(encoded))
del encoded
@ -3092,6 +3092,20 @@ def test_large_input(self):
'\udc85\udc86\udcea\udceb\udcec'
'\udcef\udcfc\udcfd\udcfe\udcff')
@support.bigmemtest(size=2**31, memuse=6, dry_run=False)
def test_large_utf8_input(self, size):
# Test input longer than INT_MAX.
# Input should contain a decodable multi-byte character
# surrounding INT_MAX
encoded = (b'0123456\xed\x84\x80' * (size//8))
self.assertEqual(len(encoded), size // 8 * 10)
decoded = codecs.code_page_decode(65001, encoded, 'ignore', True)
self.assertEqual(decoded[1], len(encoded))
del encoded
self.assertEqual(len(decoded[0]), size)
self.assertEqual(decoded[0][:10], '0123456\ud10001')
self.assertEqual(decoded[0][-11:], '56\ud1000123456\ud100')
class ASCIITest(unittest.TestCase):
def test_encode(self):