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#7649: "u'%c' % char" now behaves like "u'%s' % char" and raises a UnicodeDecodeError if 'char' is a byte string that can't be decoded using the default encoding.

This commit is contained in:
Ezio Melotti 2010-02-25 17:36:04 +00:00
parent 271b7e1abb
commit 321251567e
2 changed files with 21 additions and 11 deletions
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5
Misc/NEWS
View File

@ -16,8 +16,9 @@ Core and Builtins
UnicodeEncodeError, UnicodeDecodeError, and UnicodeTranslateError to
strings.
- Issue #7649: Fix u'%c' % char for character in range 0x80..0xFF, raise an
UnicodeDecodeError.
- Issue #7649: "u'%c' % char" now behaves like "u'%s' % char" and raises a
UnicodeDecodeError if 'char' is a byte string that can't be decoded using
the default encoding.
- Issue #6902: Fix problem with built-in types format incorrectly with
0 padding.

27
Objects/unicodeobject.c
View File

@ -8170,7 +8170,8 @@ formatchar(Py_UNICODE *buf,
size_t buflen,
PyObject *v)
{
PyObject *s;
PyObject *unistr;
char *str;
/* presume that the buffer is at least 2 characters long */
if (PyUnicode_Check(v)) {
if (PyUnicode_GET_SIZE(v) != 1)
@ -8181,14 +8182,22 @@ formatchar(Py_UNICODE *buf,
else if (PyString_Check(v)) {
if (PyString_GET_SIZE(v) != 1)
goto onError;
/* #7649: if the char is a non-ascii (i.e. in range(0x80,0x100)) byte
string, "u'%c' % char" should fail with a UnicodeDecodeError */
s = PyUnicode_FromStringAndSize(PyString_AS_STRING(v), 1);
/* if the char is not decodable return -1 */
if (s == NULL)
return -1;
buf[0] = PyUnicode_AS_UNICODE(s)[0];
Py_DECREF(s);
/* #7649: "u'%c' % char" should behave like "u'%s' % char" and fail
with a UnicodeDecodeError if 'char' is not decodable with the
default encoding (usually ASCII, but it might be something else) */
str = PyString_AS_STRING(v);
if ((unsigned char)str[0] > 0x7F) {
/* the char is not ASCII; try to decode the string using the
default encoding and return -1 to let the UnicodeDecodeError
be raised if the string can't be decoded */
unistr = PyUnicode_Decode(str, 1, NULL, "strict");
if (unistr == NULL)
return -1;
buf[0] = PyUnicode_AS_UNICODE(unistr)[0];
Py_DECREF(unistr);
}
else
buf[0] = (Py_UNICODE)str[0];
}
else {