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-rw-r--r--Objects/methodobject.c323
1 files changed, 323 insertions, 0 deletions
diff --git a/Objects/methodobject.c b/Objects/methodobject.c
index 4050922e03..d0fbefd550 100644
--- a/Objects/methodobject.c
+++ b/Objects/methodobject.c
@@ -77,6 +77,329 @@ PyCFunction_GetFlags(PyObject *op)
return PyCFunction_GET_FLAGS(op);
}
+static PyObject *
+cfunction_call_varargs(PyObject *func, PyObject *args, PyObject *kwargs)
+{
+ assert(!PyErr_Occurred());
+
+ PyCFunction meth = PyCFunction_GET_FUNCTION(func);
+ PyObject *self = PyCFunction_GET_SELF(func);
+ PyObject *result;
+
+ if (PyCFunction_GET_FLAGS(func) & METH_KEYWORDS) {
+ if (Py_EnterRecursiveCall(" while calling a Python object")) {
+ return NULL;
+ }
+
+ result = (*(PyCFunctionWithKeywords)meth)(self, args, kwargs);
+
+ Py_LeaveRecursiveCall();
+ }
+ else {
+ if (kwargs != NULL && PyDict_Size(kwargs) != 0) {
+ PyErr_Format(PyExc_TypeError, "%.200s() takes no keyword arguments",
+ ((PyCFunctionObject*)func)->m_ml->ml_name);
+ return NULL;
+ }
+
+ if (Py_EnterRecursiveCall(" while calling a Python object")) {
+ return NULL;
+ }
+
+ result = (*meth)(self, args);
+
+ Py_LeaveRecursiveCall();
+ }
+
+ return _Py_CheckFunctionResult(func, result, NULL);
+}
+
+
+PyObject *
+PyCFunction_Call(PyObject *func, PyObject *args, PyObject *kwargs)
+{
+ /* first try METH_VARARGS to pass directly args tuple unchanged.
+ _PyMethodDef_RawFastCallDict() creates a new temporary tuple
+ for METH_VARARGS. */
+ if (PyCFunction_GET_FLAGS(func) & METH_VARARGS) {
+ return cfunction_call_varargs(func, args, kwargs);
+ }
+ else {
+ return _PyCFunction_FastCallDict(func,
+ &PyTuple_GET_ITEM(args, 0),
+ PyTuple_GET_SIZE(args),
+ kwargs);
+ }
+}
+
+PyObject *
+_PyMethodDef_RawFastCallDict(PyMethodDef *method, PyObject *self, PyObject **args,
+ Py_ssize_t nargs, PyObject *kwargs)
+{
+ /* _PyMethodDef_RawFastCallDict() must not be called with an exception set,
+ because it can clear it (directly or indirectly) and so the
+ caller loses its exception */
+ assert(!PyErr_Occurred());
+
+ assert(method != NULL);
+ assert(nargs >= 0);
+ assert(nargs == 0 || args != NULL);
+ assert(kwargs == NULL || PyDict_Check(kwargs));
+
+ PyCFunction meth = method->ml_meth;
+ int flags = method->ml_flags & ~(METH_CLASS | METH_STATIC | METH_COEXIST);
+ PyObject *result = NULL;
+
+ if (Py_EnterRecursiveCall(" while calling a Python object")) {
+ return NULL;
+ }
+
+ switch (flags)
+ {
+ case METH_NOARGS:
+ if (nargs != 0) {
+ PyErr_Format(PyExc_TypeError,
+ "%.200s() takes no arguments (%zd given)",
+ method->ml_name, nargs);
+ goto exit;
+ }
+
+ if (kwargs != NULL && PyDict_GET_SIZE(kwargs) != 0) {
+ goto no_keyword_error;
+ }
+
+ result = (*meth) (self, NULL);
+ break;
+
+ case METH_O:
+ if (nargs != 1) {
+ PyErr_Format(PyExc_TypeError,
+ "%.200s() takes exactly one argument (%zd given)",
+ method->ml_name, nargs);
+ goto exit;
+ }
+
+ if (kwargs != NULL && PyDict_GET_SIZE(kwargs) != 0) {
+ goto no_keyword_error;
+ }
+
+ result = (*meth) (self, args[0]);
+ break;
+
+ case METH_VARARGS:
+ if (!(flags & METH_KEYWORDS)
+ && kwargs != NULL && PyDict_GET_SIZE(kwargs) != 0) {
+ goto no_keyword_error;
+ }
+ /* fall through next case */
+
+ case METH_VARARGS | METH_KEYWORDS:
+ {
+ /* Slow-path: create a temporary tuple for positional arguments */
+ PyObject *argstuple = _PyStack_AsTuple(args, nargs);
+ if (argstuple == NULL) {
+ goto exit;
+ }
+
+ if (flags & METH_KEYWORDS) {
+ result = (*(PyCFunctionWithKeywords)meth) (self, argstuple, kwargs);
+ }
+ else {
+ result = (*meth) (self, argstuple);
+ }
+ Py_DECREF(argstuple);
+ break;
+ }
+
+ case METH_FASTCALL:
+ {
+ PyObject **stack;
+ PyObject *kwnames;
+ _PyCFunctionFast fastmeth = (_PyCFunctionFast)meth;
+
+ if (_PyStack_UnpackDict(args, nargs, kwargs, &stack, &kwnames) < 0) {
+ goto exit;
+ }
+
+ result = (*fastmeth) (self, stack, nargs, kwnames);
+ if (stack != args) {
+ PyMem_Free(stack);
+ }
+ Py_XDECREF(kwnames);
+ break;
+ }
+
+ default:
+ PyErr_SetString(PyExc_SystemError,
+ "Bad call flags in _PyMethodDef_RawFastCallDict. "
+ "METH_OLDARGS is no longer supported!");
+ goto exit;
+ }
+
+ goto exit;
+
+no_keyword_error:
+ PyErr_Format(PyExc_TypeError,
+ "%.200s() takes no keyword arguments",
+ method->ml_name, nargs);
+
+exit:
+ Py_LeaveRecursiveCall();
+ return result;
+}
+
+PyObject *
+_PyCFunction_FastCallDict(PyObject *func, PyObject **args, Py_ssize_t nargs,
+ PyObject *kwargs)
+{
+ PyObject *result;
+
+ assert(func != NULL);
+ assert(PyCFunction_Check(func));
+
+ result = _PyMethodDef_RawFastCallDict(((PyCFunctionObject*)func)->m_ml,
+ PyCFunction_GET_SELF(func),
+ args, nargs, kwargs);
+ result = _Py_CheckFunctionResult(func, result, NULL);
+ return result;
+}
+
+PyObject *
+_PyMethodDef_RawFastCallKeywords(PyMethodDef *method, PyObject *self, PyObject **args,
+ Py_ssize_t nargs, PyObject *kwnames)
+{
+ /* _PyMethodDef_RawFastCallKeywords() must not be called with an exception set,
+ because it can clear it (directly or indirectly) and so the
+ caller loses its exception */
+ assert(!PyErr_Occurred());
+
+ assert(method != NULL);
+ assert(nargs >= 0);
+ assert(kwnames == NULL || PyTuple_CheckExact(kwnames));
+ /* kwnames must only contains str strings, no subclass, and all keys must
+ be unique */
+
+ PyCFunction meth = method->ml_meth;
+ int flags = method->ml_flags & ~(METH_CLASS | METH_STATIC | METH_COEXIST);
+ Py_ssize_t nkwargs = kwnames == NULL ? 0 : PyTuple_Size(kwnames);
+ PyObject *result = NULL;
+
+ if (Py_EnterRecursiveCall(" while calling a Python object")) {
+ return NULL;
+ }
+
+ switch (flags)
+ {
+ case METH_NOARGS:
+ if (nargs != 0) {
+ PyErr_Format(PyExc_TypeError,
+ "%.200s() takes no arguments (%zd given)",
+ method->ml_name, nargs);
+ goto exit;
+ }
+
+ if (nkwargs) {
+ goto no_keyword_error;
+ }
+
+ result = (*meth) (self, NULL);
+ break;
+
+ case METH_O:
+ if (nargs != 1) {
+ PyErr_Format(PyExc_TypeError,
+ "%.200s() takes exactly one argument (%zd given)",
+ method->ml_name, nargs);
+ goto exit;
+ }
+
+ if (nkwargs) {
+ goto no_keyword_error;
+ }
+
+ result = (*meth) (self, args[0]);
+ break;
+
+ case METH_FASTCALL:
+ /* Fast-path: avoid temporary dict to pass keyword arguments */
+ result = ((_PyCFunctionFast)meth) (self, args, nargs, kwnames);
+ break;
+
+ case METH_VARARGS:
+ case METH_VARARGS | METH_KEYWORDS:
+ {
+ /* Slow-path: create a temporary tuple for positional arguments
+ and a temporary dict for keyword arguments */
+ PyObject *argtuple;
+
+ if (!(flags & METH_KEYWORDS) && nkwargs) {
+ goto no_keyword_error;
+ }
+
+ argtuple = _PyStack_AsTuple(args, nargs);
+ if (argtuple == NULL) {
+ goto exit;
+ }
+
+ if (flags & METH_KEYWORDS) {
+ PyObject *kwdict;
+
+ if (nkwargs > 0) {
+ kwdict = _PyStack_AsDict(args + nargs, kwnames);
+ if (kwdict == NULL) {
+ Py_DECREF(argtuple);
+ goto exit;
+ }
+ }
+ else {
+ kwdict = NULL;
+ }
+
+ result = (*(PyCFunctionWithKeywords)meth) (self, argtuple, kwdict);
+ Py_XDECREF(kwdict);
+ }
+ else {
+ result = (*meth) (self, argtuple);
+ }
+ Py_DECREF(argtuple);
+ break;
+ }
+
+ default:
+ PyErr_SetString(PyExc_SystemError,
+ "Bad call flags in _PyCFunction_FastCallKeywords. "
+ "METH_OLDARGS is no longer supported!");
+ goto exit;
+ }
+
+ goto exit;
+
+no_keyword_error:
+ PyErr_Format(PyExc_TypeError,
+ "%.200s() takes no keyword arguments",
+ method->ml_name);
+
+exit:
+ Py_LeaveRecursiveCall();
+ return result;
+}
+
+PyObject *
+_PyCFunction_FastCallKeywords(PyObject *func, PyObject **args,
+ Py_ssize_t nargs, PyObject *kwnames)
+{
+ PyObject *result;
+
+ assert(func != NULL);
+ assert(PyCFunction_Check(func));
+
+ result = _PyMethodDef_RawFastCallKeywords(((PyCFunctionObject*)func)->m_ml,
+ PyCFunction_GET_SELF(func),
+ args, nargs, kwnames);
+ result = _Py_CheckFunctionResult(func, result, NULL);
+ return result;
+}
+
/* Methods (the standard built-in methods, that is) */
static void
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