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Commit 3e693810 authored by Ezio Melotti's avatar Ezio Melotti
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#8271: merge with 3.3.

parents fff726f3 d29dec82
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Showing with 291 additions and 37 deletions
Lib/test/test_unicode.py
View file @ 3e693810
......@@ -1349,7 +1349,7 @@ class UnicodeTest(string_tests.CommonTest,
# with start byte of a 2-byte sequence
(b'\xc2', FFFD), # only the start byte
(b'\xc2\xc2', FFFD*2), # 2 start bytes
(b'\xc2\xc2\xc2', FFFD*3), # 2 start bytes
(b'\xc2\xc2\xc2', FFFD*3), # 3 start bytes
(b'\xc2\x41', FFFD+'A'), # invalid continuation byte
# with start byte of a 3-byte sequence
(b'\xe1', FFFD), # only the start byte
......@@ -1419,6 +1419,226 @@ class UnicodeTest(string_tests.CommonTest,
self.assertEqual(seq.decode('utf-8', 'ignore'),
res.replace('\uFFFD', ''))
def to_bytestring(self, seq):
return bytes(int(c, 16) for c in seq.split())
def assertCorrectUTF8Decoding(self, seq, res, err):
"""
Check that an invalid UTF-8 sequence raises an UnicodeDecodeError when
'strict' is used, returns res when 'replace' is used, and that doesn't
return anything when 'ignore' is used.
"""
with self.assertRaises(UnicodeDecodeError) as cm:
seq.decode('utf-8')
exc = cm.exception
self.assertIn(err, str(exc))
self.assertEqual(seq.decode('utf-8', 'replace'), res)
self.assertEqual((b'aaaa' + seq + b'bbbb').decode('utf-8', 'replace'),
'aaaa' + res + 'bbbb')
res = res.replace('\ufffd', '')
self.assertEqual(seq.decode('utf-8', 'ignore'), res)
self.assertEqual((b'aaaa' + seq + b'bbbb').decode('utf-8', 'ignore'),
'aaaa' + res + 'bbbb')
def test_invalid_start_byte(self):
"""
Test that an 'invalid start byte' error is raised when the first byte
is not in the ASCII range or is not a valid start byte of a 2-, 3-, or
4-bytes sequence. The invalid start byte is replaced with a single
U+FFFD when errors='replace'.
E.g. <80> is a continuation byte and can appear only after a start byte.
"""
FFFD = '\ufffd'
for byte in b'\x80\xA0\x9F\xBF\xC0\xC1\xF5\xFF':
self.assertCorrectUTF8Decoding(bytes([byte]), '\ufffd',
'invalid start byte')
def test_unexpected_end_of_data(self):
"""
Test that an 'unexpected end of data' error is raised when the string
ends after a start byte of a 2-, 3-, or 4-bytes sequence without having
enough continuation bytes. The incomplete sequence is replaced with a
single U+FFFD when errors='replace'.
E.g. in the sequence <F3 80 80>, F3 is the start byte of a 4-bytes
sequence, but it's followed by only 2 valid continuation bytes and the
last continuation bytes is missing.
Note: the continuation bytes must be all valid, if one of them is
invalid another error will be raised.
"""
sequences = [
'C2', 'DF',
'E0 A0', 'E0 BF', 'E1 80', 'E1 BF', 'EC 80', 'EC BF',
'ED 80', 'ED 9F', 'EE 80', 'EE BF', 'EF 80', 'EF BF',
'F0 90', 'F0 BF', 'F0 90 80', 'F0 90 BF', 'F0 BF 80', 'F0 BF BF',
'F1 80', 'F1 BF', 'F1 80 80', 'F1 80 BF', 'F1 BF 80', 'F1 BF BF',
'F3 80', 'F3 BF', 'F3 80 80', 'F3 80 BF', 'F3 BF 80', 'F3 BF BF',
'F4 80', 'F4 8F', 'F4 80 80', 'F4 80 BF', 'F4 8F 80', 'F4 8F BF'
]
FFFD = '\ufffd'
for seq in sequences:
self.assertCorrectUTF8Decoding(self.to_bytestring(seq), '\ufffd',
'unexpected end of data')
def test_invalid_cb_for_2bytes_seq(self):
"""
Test that an 'invalid continuation byte' error is raised when the
continuation byte of a 2-bytes sequence is invalid. The start byte
is replaced by a single U+FFFD and the second byte is handled
separately when errors='replace'.
E.g. in the sequence <C2 41>, C2 is the start byte of a 2-bytes
sequence, but 41 is not a valid continuation byte because it's the
ASCII letter 'A'.
"""
FFFD = '\ufffd'
FFFDx2 = FFFD * 2
sequences = [
('C2 00', FFFD+'\x00'), ('C2 7F', FFFD+'\x7f'),
('C2 C0', FFFDx2), ('C2 FF', FFFDx2),
('DF 00', FFFD+'\x00'), ('DF 7F', FFFD+'\x7f'),
('DF C0', FFFDx2), ('DF FF', FFFDx2),
]
for seq, res in sequences:
self.assertCorrectUTF8Decoding(self.to_bytestring(seq), res,
'invalid continuation byte')
def test_invalid_cb_for_3bytes_seq(self):
"""
Test that an 'invalid continuation byte' error is raised when the
continuation byte(s) of a 3-bytes sequence are invalid. When
errors='replace', if the first continuation byte is valid, the first
two bytes (start byte + 1st cb) are replaced by a single U+FFFD and the
third byte is handled separately, otherwise only the start byte is
replaced with a U+FFFD and the other continuation bytes are handled
separately.
E.g. in the sequence <E1 80 41>, E1 is the start byte of a 3-bytes
sequence, 80 is a valid continuation byte, but 41 is not a valid cb
because it's the ASCII letter 'A'.
Note: when the start byte is E0 or ED, the valid ranges for the first
continuation byte are limited to A0..BF and 80..9F respectively.
Python 2 used to consider all the bytes in range 80..BF valid when the
start byte was ED. This is fixed in Python 3.
"""
FFFD = '\ufffd'
FFFDx2 = FFFD * 2
sequences = [
('E0 00', FFFD+'\x00'), ('E0 7F', FFFD+'\x7f'), ('E0 80', FFFDx2),
('E0 9F', FFFDx2), ('E0 C0', FFFDx2), ('E0 FF', FFFDx2),
('E0 A0 00', FFFD+'\x00'), ('E0 A0 7F', FFFD+'\x7f'),
('E0 A0 C0', FFFDx2), ('E0 A0 FF', FFFDx2),
('E0 BF 00', FFFD+'\x00'), ('E0 BF 7F', FFFD+'\x7f'),
('E0 BF C0', FFFDx2), ('E0 BF FF', FFFDx2), ('E1 00', FFFD+'\x00'),
('E1 7F', FFFD+'\x7f'), ('E1 C0', FFFDx2), ('E1 FF', FFFDx2),
('E1 80 00', FFFD+'\x00'), ('E1 80 7F', FFFD+'\x7f'),
('E1 80 C0', FFFDx2), ('E1 80 FF', FFFDx2),
('E1 BF 00', FFFD+'\x00'), ('E1 BF 7F', FFFD+'\x7f'),
('E1 BF C0', FFFDx2), ('E1 BF FF', FFFDx2), ('EC 00', FFFD+'\x00'),
('EC 7F', FFFD+'\x7f'), ('EC C0', FFFDx2), ('EC FF', FFFDx2),
('EC 80 00', FFFD+'\x00'), ('EC 80 7F', FFFD+'\x7f'),
('EC 80 C0', FFFDx2), ('EC 80 FF', FFFDx2),
('EC BF 00', FFFD+'\x00'), ('EC BF 7F', FFFD+'\x7f'),
('EC BF C0', FFFDx2), ('EC BF FF', FFFDx2), ('ED 00', FFFD+'\x00'),
('ED 7F', FFFD+'\x7f'),
('ED A0', FFFDx2), ('ED BF', FFFDx2), # see note ^
('ED C0', FFFDx2), ('ED FF', FFFDx2), ('ED 80 00', FFFD+'\x00'),
('ED 80 7F', FFFD+'\x7f'), ('ED 80 C0', FFFDx2),
('ED 80 FF', FFFDx2), ('ED 9F 00', FFFD+'\x00'),
('ED 9F 7F', FFFD+'\x7f'), ('ED 9F C0', FFFDx2),
('ED 9F FF', FFFDx2), ('EE 00', FFFD+'\x00'),
('EE 7F', FFFD+'\x7f'), ('EE C0', FFFDx2), ('EE FF', FFFDx2),
('EE 80 00', FFFD+'\x00'), ('EE 80 7F', FFFD+'\x7f'),
('EE 80 C0', FFFDx2), ('EE 80 FF', FFFDx2),
('EE BF 00', FFFD+'\x00'), ('EE BF 7F', FFFD+'\x7f'),
('EE BF C0', FFFDx2), ('EE BF FF', FFFDx2), ('EF 00', FFFD+'\x00'),
('EF 7F', FFFD+'\x7f'), ('EF C0', FFFDx2), ('EF FF', FFFDx2),
('EF 80 00', FFFD+'\x00'), ('EF 80 7F', FFFD+'\x7f'),
('EF 80 C0', FFFDx2), ('EF 80 FF', FFFDx2),
('EF BF 00', FFFD+'\x00'), ('EF BF 7F', FFFD+'\x7f'),
('EF BF C0', FFFDx2), ('EF BF FF', FFFDx2),
]
for seq, res in sequences:
self.assertCorrectUTF8Decoding(self.to_bytestring(seq), res,
'invalid continuation byte')
def test_invalid_cb_for_4bytes_seq(self):
"""
Test that an 'invalid continuation byte' error is raised when the
continuation byte(s) of a 4-bytes sequence are invalid. When
errors='replace',the start byte and all the following valid
continuation bytes are replaced with a single U+FFFD, and all the bytes
starting from the first invalid continuation bytes (included) are
handled separately.
E.g. in the sequence <E1 80 41>, E1 is the start byte of a 3-bytes
sequence, 80 is a valid continuation byte, but 41 is not a valid cb
because it's the ASCII letter 'A'.
Note: when the start byte is E0 or ED, the valid ranges for the first
continuation byte are limited to A0..BF and 80..9F respectively.
However, when the start byte is ED, Python 2 considers all the bytes
in range 80..BF valid. This is fixed in Python 3.
"""
FFFD = '\ufffd'
FFFDx2 = FFFD * 2
sequences = [
('F0 00', FFFD+'\x00'), ('F0 7F', FFFD+'\x7f'), ('F0 80', FFFDx2),
('F0 8F', FFFDx2), ('F0 C0', FFFDx2), ('F0 FF', FFFDx2),
('F0 90 00', FFFD+'\x00'), ('F0 90 7F', FFFD+'\x7f'),
('F0 90 C0', FFFDx2), ('F0 90 FF', FFFDx2),
('F0 BF 00', FFFD+'\x00'), ('F0 BF 7F', FFFD+'\x7f'),
('F0 BF C0', FFFDx2), ('F0 BF FF', FFFDx2),
('F0 90 80 00', FFFD+'\x00'), ('F0 90 80 7F', FFFD+'\x7f'),
('F0 90 80 C0', FFFDx2), ('F0 90 80 FF', FFFDx2),
('F0 90 BF 00', FFFD+'\x00'), ('F0 90 BF 7F', FFFD+'\x7f'),
('F0 90 BF C0', FFFDx2), ('F0 90 BF FF', FFFDx2),
('F0 BF 80 00', FFFD+'\x00'), ('F0 BF 80 7F', FFFD+'\x7f'),
('F0 BF 80 C0', FFFDx2), ('F0 BF 80 FF', FFFDx2),
('F0 BF BF 00', FFFD+'\x00'), ('F0 BF BF 7F', FFFD+'\x7f'),
('F0 BF BF C0', FFFDx2), ('F0 BF BF FF', FFFDx2),
('F1 00', FFFD+'\x00'), ('F1 7F', FFFD+'\x7f'), ('F1 C0', FFFDx2),
('F1 FF', FFFDx2), ('F1 80 00', FFFD+'\x00'),
('F1 80 7F', FFFD+'\x7f'), ('F1 80 C0', FFFDx2),
('F1 80 FF', FFFDx2), ('F1 BF 00', FFFD+'\x00'),
('F1 BF 7F', FFFD+'\x7f'), ('F1 BF C0', FFFDx2),
('F1 BF FF', FFFDx2), ('F1 80 80 00', FFFD+'\x00'),
('F1 80 80 7F', FFFD+'\x7f'), ('F1 80 80 C0', FFFDx2),
('F1 80 80 FF', FFFDx2), ('F1 80 BF 00', FFFD+'\x00'),
('F1 80 BF 7F', FFFD+'\x7f'), ('F1 80 BF C0', FFFDx2),
('F1 80 BF FF', FFFDx2), ('F1 BF 80 00', FFFD+'\x00'),
('F1 BF 80 7F', FFFD+'\x7f'), ('F1 BF 80 C0', FFFDx2),
('F1 BF 80 FF', FFFDx2), ('F1 BF BF 00', FFFD+'\x00'),
('F1 BF BF 7F', FFFD+'\x7f'), ('F1 BF BF C0', FFFDx2),
('F1 BF BF FF', FFFDx2), ('F3 00', FFFD+'\x00'),
('F3 7F', FFFD+'\x7f'), ('F3 C0', FFFDx2), ('F3 FF', FFFDx2),
('F3 80 00', FFFD+'\x00'), ('F3 80 7F', FFFD+'\x7f'),
('F3 80 C0', FFFDx2), ('F3 80 FF', FFFDx2),
('F3 BF 00', FFFD+'\x00'), ('F3 BF 7F', FFFD+'\x7f'),
('F3 BF C0', FFFDx2), ('F3 BF FF', FFFDx2),
('F3 80 80 00', FFFD+'\x00'), ('F3 80 80 7F', FFFD+'\x7f'),
('F3 80 80 C0', FFFDx2), ('F3 80 80 FF', FFFDx2),
('F3 80 BF 00', FFFD+'\x00'), ('F3 80 BF 7F', FFFD+'\x7f'),
('F3 80 BF C0', FFFDx2), ('F3 80 BF FF', FFFDx2),
('F3 BF 80 00', FFFD+'\x00'), ('F3 BF 80 7F', FFFD+'\x7f'),
('F3 BF 80 C0', FFFDx2), ('F3 BF 80 FF', FFFDx2),
('F3 BF BF 00', FFFD+'\x00'), ('F3 BF BF 7F', FFFD+'\x7f'),
('F3 BF BF C0', FFFDx2), ('F3 BF BF FF', FFFDx2),
('F4 00', FFFD+'\x00'), ('F4 7F', FFFD+'\x7f'), ('F4 90', FFFDx2),
('F4 BF', FFFDx2), ('F4 C0', FFFDx2), ('F4 FF', FFFDx2),
('F4 80 00', FFFD+'\x00'), ('F4 80 7F', FFFD+'\x7f'),
('F4 80 C0', FFFDx2), ('F4 80 FF', FFFDx2),
('F4 8F 00', FFFD+'\x00'), ('F4 8F 7F', FFFD+'\x7f'),
('F4 8F C0', FFFDx2), ('F4 8F FF', FFFDx2),
('F4 80 80 00', FFFD+'\x00'), ('F4 80 80 7F', FFFD+'\x7f'),
('F4 80 80 C0', FFFDx2), ('F4 80 80 FF', FFFDx2),
('F4 80 BF 00', FFFD+'\x00'), ('F4 80 BF 7F', FFFD+'\x7f'),
('F4 80 BF C0', FFFDx2), ('F4 80 BF FF', FFFDx2),
('F4 8F 80 00', FFFD+'\x00'), ('F4 8F 80 7F', FFFD+'\x7f'),
('F4 8F 80 C0', FFFDx2), ('F4 8F 80 FF', FFFDx2),
('F4 8F BF 00', FFFD+'\x00'), ('F4 8F BF 7F', FFFD+'\x7f'),
('F4 8F BF C0', FFFDx2), ('F4 8F BF FF', FFFDx2)
]
for seq, res in sequences:
self.assertCorrectUTF8Decoding(self.to_bytestring(seq), res,
'invalid continuation byte')
def test_codecs_idna(self):
# Test whether trailing dot is preserved
self.assertEqual("www.python.org.".encode("idna"), b"www.python.org.")
......
Misc/NEWS
View file @ 3e693810
......@@ -10,6 +10,10 @@ What's New in Python 3.4.0 Alpha 1?
Core and Builtins
-----------------
- Issue #8271: the utf-8 decoder now outputs the correct number of U+FFFD
characters when used with the 'replace' error handler on invalid utf-8
sequences. Patch by Serhiy Storchaka, tests by Ezio Melotti.
- Issue #5765: Apply a hard recursion limit in the compiler instead of
blowing the stack and segfaulting. Initial patch by Andrea Griffini.
......
Objects/stringlib/codecs.h
View file @ 3e693810
......@@ -91,15 +91,14 @@ STRINGLIB(utf8_decode)(const char **inptr, const char *end,
}
}
if (ch < 0xC2) {
/* invalid sequence
\x80-\xBF -- continuation byte
\xC0-\xC1 -- fake 0000-007F */
goto InvalidStart;
}
if (ch < 0xE0) {
/* \xC2\x80-\xDF\xBF -- 0080-07FF */
if (ch < 0xC2) {
/* invalid sequence
\x80-\xBF -- continuation byte
\xC0-\xC1 -- fake 0000-007F */
goto InvalidStart;
}
Py_UCS4 ch2;
if (end - s < 2) {
/* unexpected end of data: the caller will decide whether
......@@ -109,14 +108,15 @@ STRINGLIB(utf8_decode)(const char **inptr, const char *end,
ch2 = (unsigned char)s[1];
if (!IS_CONTINUATION_BYTE(ch2))
/* invalid continuation byte */
goto InvalidContinuation;
goto InvalidContinuation1;
ch = (ch << 6) + ch2 -
((0xC0 << 6) + 0x80);
assert ((ch > 0x007F) && (ch <= 0x07FF));
s += 2;
if (STRINGLIB_MAX_CHAR <= 0x007F ||
(STRINGLIB_MAX_CHAR < 0x07FF && ch > STRINGLIB_MAX_CHAR))
goto Overflow;
/* Out-of-range */
goto Return;
*p++ = ch;
continue;
}
......@@ -127,28 +127,37 @@ STRINGLIB(utf8_decode)(const char **inptr, const char *end,
if (end - s < 3) {
/* unexpected end of data: the caller will decide whether
it's an error or not */
if (end - s < 2)
break;
ch2 = (unsigned char)s[1];
if (!IS_CONTINUATION_BYTE(ch2) ||
(ch2 < 0xA0 ? ch == 0xE0 : ch == 0xED))
/* for clarification see comments below */
goto InvalidContinuation1;
break;
}
ch2 = (unsigned char)s[1];
ch3 = (unsigned char)s[2];
if (!IS_CONTINUATION_BYTE(ch2) ||
!IS_CONTINUATION_BYTE(ch3)) {
if (!IS_CONTINUATION_BYTE(ch2)) {
/* invalid continuation byte */
goto InvalidContinuation;
goto InvalidContinuation1;
}
if (ch == 0xE0) {
if (ch2 < 0xA0)
/* invalid sequence
\xE0\x80\x80-\xE0\x9F\xBF -- fake 0000-0800 */
goto InvalidContinuation;
}
else if (ch == 0xED && ch2 > 0x9F) {
goto InvalidContinuation1;
} else if (ch == 0xED && ch2 >= 0xA0) {
/* Decoding UTF-8 sequences in range \xED\xA0\x80-\xED\xBF\xBF
will result in surrogates in range D800-DFFF. Surrogates are
not valid UTF-8 so they are rejected.
See http://www.unicode.org/versions/Unicode5.2.0/ch03.pdf
(table 3-7) and http://www.rfc-editor.org/rfc/rfc3629.txt */
goto InvalidContinuation;
goto InvalidContinuation1;
}
if (!IS_CONTINUATION_BYTE(ch3)) {
/* invalid continuation byte */
goto InvalidContinuation2;
}
ch = (ch << 12) + (ch2 << 6) + ch3 -
((0xE0 << 12) + (0x80 << 6) + 0x80);
......@@ -156,7 +165,8 @@ STRINGLIB(utf8_decode)(const char **inptr, const char *end,
s += 3;
if (STRINGLIB_MAX_CHAR <= 0x07FF ||
(STRINGLIB_MAX_CHAR < 0xFFFF && ch > STRINGLIB_MAX_CHAR))
goto Overflow;
/* Out-of-range */
goto Return;
*p++ = ch;
continue;
}
......@@ -167,27 +177,44 @@ STRINGLIB(utf8_decode)(const char **inptr, const char *end,
if (end - s < 4) {
/* unexpected end of data: the caller will decide whether
it's an error or not */
if (end - s < 2)
break;
ch2 = (unsigned char)s[1];
if (!IS_CONTINUATION_BYTE(ch2) ||
(ch2 < 0x90 ? ch == 0xF0 : ch == 0xF4))
/* for clarification see comments below */
goto InvalidContinuation1;
if (end - s < 3)
break;
ch3 = (unsigned char)s[2];
if (!IS_CONTINUATION_BYTE(ch3))
goto InvalidContinuation2;
break;
}
ch2 = (unsigned char)s[1];
ch3 = (unsigned char)s[2];
ch4 = (unsigned char)s[3];
if (!IS_CONTINUATION_BYTE(ch2) ||
!IS_CONTINUATION_BYTE(ch3) ||
!IS_CONTINUATION_BYTE(ch4)) {
if (!IS_CONTINUATION_BYTE(ch2)) {
/* invalid continuation byte */
goto InvalidContinuation;
goto InvalidContinuation1;
}
if (ch == 0xF0) {
if (ch2 < 0x90)
/* invalid sequence
\xF0\x80\x80\x80-\xF0\x80\xBF\xBF -- fake 0000-FFFF */
goto InvalidContinuation;
}
else if (ch == 0xF4 && ch2 > 0x8F) {
\xF0\x80\x80\x80-\xF0\x8F\xBF\xBF -- fake 0000-FFFF */
goto InvalidContinuation1;
} else if (ch == 0xF4 && ch2 >= 0x90) {
/* invalid sequence
\xF4\x90\x80\80- -- 110000- overflow */
goto InvalidContinuation;
goto InvalidContinuation1;
}
if (!IS_CONTINUATION_BYTE(ch3)) {
/* invalid continuation byte */
goto InvalidContinuation2;
}
if (!IS_CONTINUATION_BYTE(ch4)) {
/* invalid continuation byte */
goto InvalidContinuation3;
}
ch = (ch << 18) + (ch2 << 12) + (ch3 << 6) + ch4 -
((0xF0 << 18) + (0x80 << 12) + (0x80 << 6) + 0x80);
......@@ -195,14 +222,14 @@ STRINGLIB(utf8_decode)(const char **inptr, const char *end,
s += 4;
if (STRINGLIB_MAX_CHAR <= 0xFFFF ||
(STRINGLIB_MAX_CHAR < 0x10FFFF && ch > STRINGLIB_MAX_CHAR))
goto Overflow;
/* Out-of-range */
goto Return;
*p++ = ch;
continue;
}
goto InvalidStart;
}
ch = 0;
Overflow:
Return:
*inptr = s;
*outpos = p - dest;
......@@ -210,13 +237,18 @@ Return:
InvalidStart:
ch = 1;
goto Return;
InvalidContinuation:
InvalidContinuation1:
ch = 2;
goto Return;
InvalidContinuation2:
ch = 3;
goto Return;
InvalidContinuation3:
ch = 4;
goto Return;
}
#undef ASCII_CHAR_MASK
#undef IS_CONTINUATION_BYTE
/* UTF-8 encoder specialized for a Unicode kind to avoid the slow
......
Objects/unicodeobject.c
View file @ 3e693810
......@@ -4611,9 +4611,7 @@ PyUnicode_DecodeUTF8Stateful(const char *s,
goto End;
errmsg = "unexpected end of data";
startinpos = s - starts;
endinpos = startinpos + 1;
while (endinpos < size && (starts[endinpos] & 0xC0) == 0x80)
endinpos++;
endinpos = end - starts;
break;
case 1:
errmsg = "invalid start byte";
......@@ -4621,11 +4619,11 @@ PyUnicode_DecodeUTF8Stateful(const char *s,
endinpos = startinpos + 1;
break;
case 2:
case 3:
case 4:
errmsg = "invalid continuation byte";
startinpos = s - starts;
endinpos = startinpos + 1;
while (endinpos < size && (starts[endinpos] & 0xC0) == 0x80)
endinpos++;
endinpos = startinpos + ch - 1;
break;
default:
if (unicode_putchar(&unicode, &outpos, ch) < 0)
......
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