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| author | Walter Dörwald <walter@livinglogic.de> | 2003-02-04 20:24:45 (GMT) |
|---|---|---|
| committer | Walter Dörwald <walter@livinglogic.de> | 2003-02-04 20:24:45 (GMT) |
| commit | c3da83fcd7e25ffb1ed15f5adad4efa1c03ebc03 (patch) | |
| tree | abf6639ce3bd8515011ff2bbeadc45f8a07caa73 /Python/bltinmodule.c | |
| parent | 29273c87da0ef361f84fee41385f7c991536f9cd (diff) | |
| download | cpython-c3da83fcd7e25ffb1ed15f5adad4efa1c03ebc03.zip cpython-c3da83fcd7e25ffb1ed15f5adad4efa1c03ebc03.tar.gz cpython-c3da83fcd7e25ffb1ed15f5adad4efa1c03ebc03.tar.bz2 | |
Make sure filter() never returns tuple, str or unicode
subclasses. (Discussed in SF patch #665835)
Diffstat (limited to 'Python/bltinmodule.c')
| -rw-r--r-- | Python/bltinmodule.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c index 2383b4f..b74e09c 100644 --- a/Python/bltinmodule.c +++ b/Python/bltinmodule.c @@ -1838,7 +1838,10 @@ filtertuple(PyObject *func, PyObject *tuple) int len = PyTuple_Size(tuple); if (len == 0) { - Py_INCREF(tuple); + if (PyTuple_CheckExact(tuple)) + Py_INCREF(tuple); + else + tuple = PyTuple_New(0); return tuple; } @@ -1895,8 +1898,15 @@ filterstring(PyObject *func, PyObject *strobj) int outlen = len; if (func == Py_None) { - /* No character is ever false -- share input string */ - Py_INCREF(strobj); + /* No character is ever false -- share input string + * (if it's not a subclass) */ + if (PyString_CheckExact(strobj)) + Py_INCREF(strobj); + else + strobj = PyString_FromStringAndSize( + PyString_AS_STRING(strobj), + len + ); return strobj; } if ((result = PyString_FromStringAndSize(NULL, len)) == NULL) @@ -1980,8 +1990,15 @@ filterunicode(PyObject *func, PyObject *strobj) int outlen = len; if (func == Py_None) { - /* No character is ever false -- share input string */ - Py_INCREF(strobj); + /* No character is ever false -- share input string + * (it if's not a subclass) */ + if (PyUnicode_CheckExact(strobj)) + Py_INCREF(strobj); + else + strobj = PyUnicode_FromUnicode( + PyUnicode_AS_UNICODE(strobj), + len + ); return strobj; } if ((result = PyUnicode_FromUnicode(NULL, len)) == NULL) |