A lot of functions in Python 3.x have blocks like
if (PyString_Check(sub_obj)) {
sub = PyString_AS_STRING(sub_obj);
sub_len = PyString_GET_SIZE(sub_obj);
}
else if (PyObject_AsCharBuffer(sub_obj, &sub, &sub_len))
return NULL;
The functions check for PyString first to gain a little speed up. I like
to add a new function to the abstract object protocol
(Objects/abstract.c) to make code more readable while keeping the speed up.
int inline
PyObject_AsString(PyObject *obj,
const char **buffer,
Py_ssize_t *buffer_len)
{
if (PyString_Check(obj)) {
*buffer = PyString_AS_STRING(obj);
*buffer_len = PyString_GET_SIZE(obj);
return 1;
}
return (PyObject_AsCharBuffer(obj, buffer, buffer_len));
}
Maybe somebody can come up with a clever macro instead of this short
inline function?
Christian
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