symbian-qemu-0.9.1-12/python-2.6.1/Objects/methodobject.c
changeset 1 2fb8b9db1c86
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-2.6.1/Objects/methodobject.c	Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,426 @@
+
+/* Method object implementation */
+
+#include "Python.h"
+#include "structmember.h"
+
+/* Free list for method objects to safe malloc/free overhead
+ * The m_self element is used to chain the objects.
+ */
+static PyCFunctionObject *free_list = NULL;
+static int numfree = 0;
+#ifndef PyCFunction_MAXFREELIST
+#define PyCFunction_MAXFREELIST 256
+#endif
+
+PyObject *
+PyCFunction_NewEx(PyMethodDef *ml, PyObject *self, PyObject *module)
+{
+	PyCFunctionObject *op;
+	op = free_list;
+	if (op != NULL) {
+		free_list = (PyCFunctionObject *)(op->m_self);
+		PyObject_INIT(op, &PyCFunction_Type);
+		numfree--;
+	}
+	else {
+		op = PyObject_GC_New(PyCFunctionObject, &PyCFunction_Type);
+		if (op == NULL)
+			return NULL;
+	}
+	op->m_ml = ml;
+	Py_XINCREF(self);
+	op->m_self = self;
+	Py_XINCREF(module);
+	op->m_module = module;
+	_PyObject_GC_TRACK(op);
+	return (PyObject *)op;
+}
+
+PyCFunction
+PyCFunction_GetFunction(PyObject *op)
+{
+	if (!PyCFunction_Check(op)) {
+		PyErr_BadInternalCall();
+		return NULL;
+	}
+	return ((PyCFunctionObject *)op) -> m_ml -> ml_meth;
+}
+
+PyObject *
+PyCFunction_GetSelf(PyObject *op)
+{
+	if (!PyCFunction_Check(op)) {
+		PyErr_BadInternalCall();
+		return NULL;
+	}
+	return ((PyCFunctionObject *)op) -> m_self;
+}
+
+int
+PyCFunction_GetFlags(PyObject *op)
+{
+	if (!PyCFunction_Check(op)) {
+		PyErr_BadInternalCall();
+		return -1;
+	}
+	return ((PyCFunctionObject *)op) -> m_ml -> ml_flags;
+}
+
+PyObject *
+PyCFunction_Call(PyObject *func, PyObject *arg, PyObject *kw)
+{
+	PyCFunctionObject* f = (PyCFunctionObject*)func;
+	PyCFunction meth = PyCFunction_GET_FUNCTION(func);
+	PyObject *self = PyCFunction_GET_SELF(func);
+	Py_ssize_t size;
+
+	switch (PyCFunction_GET_FLAGS(func) & ~(METH_CLASS | METH_STATIC | METH_COEXIST)) {
+	case METH_VARARGS:
+		if (kw == NULL || PyDict_Size(kw) == 0)
+			return (*meth)(self, arg);
+		break;
+	case METH_VARARGS | METH_KEYWORDS:
+	case METH_OLDARGS | METH_KEYWORDS:
+		return (*(PyCFunctionWithKeywords)meth)(self, arg, kw);
+	case METH_NOARGS:
+		if (kw == NULL || PyDict_Size(kw) == 0) {
+			size = PyTuple_GET_SIZE(arg);
+			if (size == 0)
+				return (*meth)(self, NULL);
+			PyErr_Format(PyExc_TypeError,
+			    "%.200s() takes no arguments (%zd given)",
+			    f->m_ml->ml_name, size);
+			return NULL;
+		}
+		break;
+	case METH_O:
+		if (kw == NULL || PyDict_Size(kw) == 0) {
+			size = PyTuple_GET_SIZE(arg);
+			if (size == 1)
+				return (*meth)(self, PyTuple_GET_ITEM(arg, 0));
+			PyErr_Format(PyExc_TypeError,
+			    "%.200s() takes exactly one argument (%zd given)",
+			    f->m_ml->ml_name, size);
+			return NULL;
+		}
+		break;
+	case METH_OLDARGS:
+		/* the really old style */
+		if (kw == NULL || PyDict_Size(kw) == 0) {
+			size = PyTuple_GET_SIZE(arg);
+			if (size == 1)
+				arg = PyTuple_GET_ITEM(arg, 0);
+			else if (size == 0)
+				arg = NULL;
+			return (*meth)(self, arg);
+		}
+		break;
+	default:
+		PyErr_BadInternalCall();
+		return NULL;
+	}
+	PyErr_Format(PyExc_TypeError, "%.200s() takes no keyword arguments",
+		     f->m_ml->ml_name);
+	return NULL;
+}
+
+/* Methods (the standard built-in methods, that is) */
+
+static void
+meth_dealloc(PyCFunctionObject *m)
+{
+	_PyObject_GC_UNTRACK(m);
+	Py_XDECREF(m->m_self);
+	Py_XDECREF(m->m_module);
+	if (numfree < PyCFunction_MAXFREELIST) {
+		m->m_self = (PyObject *)free_list;
+		free_list = m;
+		numfree++;
+	}
+	else {
+		PyObject_GC_Del(m);
+	}
+}
+
+static PyObject *
+meth_get__doc__(PyCFunctionObject *m, void *closure)
+{
+	const char *doc = m->m_ml->ml_doc;
+
+	if (doc != NULL)
+		return PyString_FromString(doc);
+	Py_INCREF(Py_None);
+	return Py_None;
+}
+
+static PyObject *
+meth_get__name__(PyCFunctionObject *m, void *closure)
+{
+	return PyString_FromString(m->m_ml->ml_name);
+}
+
+static int
+meth_traverse(PyCFunctionObject *m, visitproc visit, void *arg)
+{
+	Py_VISIT(m->m_self);
+	Py_VISIT(m->m_module);
+	return 0;
+}
+
+static PyObject *
+meth_get__self__(PyCFunctionObject *m, void *closure)
+{
+	PyObject *self;
+	if (PyEval_GetRestricted()) {
+		PyErr_SetString(PyExc_RuntimeError,
+			"method.__self__ not accessible in restricted mode");
+		return NULL;
+	}
+	self = m->m_self;
+	if (self == NULL)
+		self = Py_None;
+	Py_INCREF(self);
+	return self;
+}
+
+static PyGetSetDef meth_getsets [] = {
+	{"__doc__",  (getter)meth_get__doc__,  NULL, NULL},
+	{"__name__", (getter)meth_get__name__, NULL, NULL},
+	{"__self__", (getter)meth_get__self__, NULL, NULL},
+	{0}
+};
+
+#define OFF(x) offsetof(PyCFunctionObject, x)
+
+static PyMemberDef meth_members[] = {
+	{"__module__",    T_OBJECT,     OFF(m_module), PY_WRITE_RESTRICTED},
+	{NULL}
+};
+
+static PyObject *
+meth_repr(PyCFunctionObject *m)
+{
+	if (m->m_self == NULL)
+		return PyString_FromFormat("<built-in function %s>",
+					   m->m_ml->ml_name);
+	return PyString_FromFormat("<built-in method %s of %s object at %p>",
+				   m->m_ml->ml_name,
+				   m->m_self->ob_type->tp_name,
+				   m->m_self);
+}
+
+static int
+meth_compare(PyCFunctionObject *a, PyCFunctionObject *b)
+{
+	if (a->m_self != b->m_self)
+		return (a->m_self < b->m_self) ? -1 : 1;
+	if (a->m_ml->ml_meth == b->m_ml->ml_meth)
+		return 0;
+	if (strcmp(a->m_ml->ml_name, b->m_ml->ml_name) < 0)
+		return -1;
+	else
+		return 1;
+}
+
+static PyObject *
+meth_richcompare(PyObject *self, PyObject *other, int op)
+{
+	PyCFunctionObject *a, *b;
+	PyObject *res;
+	int eq;
+
+	if ((op != Py_EQ && op != Py_NE) ||
+	    !PyCFunction_Check(self) ||
+	    !PyCFunction_Check(other))
+	{
+		/* Py3K warning if types are not equal and comparison isn't == or !=  */
+		if (PyErr_WarnPy3k("builtin_function_or_method inequality "
+				   "comparisons not supported in 3.x", 1) < 0) {
+			return NULL;
+		}
+
+		Py_INCREF(Py_NotImplemented);
+		return Py_NotImplemented;
+	}
+	a = (PyCFunctionObject *)self;
+	b = (PyCFunctionObject *)other;
+	eq = a->m_self == b->m_self;
+	if (eq)
+		eq = a->m_ml->ml_meth == b->m_ml->ml_meth;
+	if (op == Py_EQ)
+		res = eq ? Py_True : Py_False;
+	else
+		res = eq ? Py_False : Py_True;
+	Py_INCREF(res);
+	return res;
+}
+
+static long
+meth_hash(PyCFunctionObject *a)
+{
+	long x,y;
+	if (a->m_self == NULL)
+		x = 0;
+	else {
+		x = PyObject_Hash(a->m_self);
+		if (x == -1)
+			return -1;
+	}
+	y = _Py_HashPointer((void*)(a->m_ml->ml_meth));
+	if (y == -1)
+		return -1;
+	x ^= y;
+	if (x == -1)
+		x = -2;
+	return x;
+}
+
+
+PyTypeObject PyCFunction_Type = {
+	PyVarObject_HEAD_INIT(&PyType_Type, 0)
+	"builtin_function_or_method",
+	sizeof(PyCFunctionObject),
+	0,
+	(destructor)meth_dealloc, 		/* tp_dealloc */
+	0,					/* tp_print */
+	0,					/* tp_getattr */
+	0,					/* tp_setattr */
+	(cmpfunc)meth_compare,			/* tp_compare */
+	(reprfunc)meth_repr,			/* tp_repr */
+	0,					/* tp_as_number */
+	0,					/* tp_as_sequence */
+	0,					/* tp_as_mapping */
+	(hashfunc)meth_hash,			/* tp_hash */
+	PyCFunction_Call,			/* tp_call */
+	0,					/* tp_str */
+	PyObject_GenericGetAttr,		/* tp_getattro */
+	0,					/* tp_setattro */
+	0,					/* tp_as_buffer */
+	Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,/* tp_flags */
+ 	0,					/* tp_doc */
+ 	(traverseproc)meth_traverse,		/* tp_traverse */
+	0,					/* tp_clear */
+	meth_richcompare,					/* tp_richcompare */
+	0,					/* tp_weaklistoffset */
+	0,					/* tp_iter */
+	0,					/* tp_iternext */
+	0,					/* tp_methods */
+	meth_members,				/* tp_members */
+	meth_getsets,				/* tp_getset */
+	0,					/* tp_base */
+	0,					/* tp_dict */
+};
+
+/* List all methods in a chain -- helper for findmethodinchain */
+
+static PyObject *
+listmethodchain(PyMethodChain *chain)
+{
+	PyMethodChain *c;
+	PyMethodDef *ml;
+	int i, n;
+	PyObject *v;
+
+	n = 0;
+	for (c = chain; c != NULL; c = c->link) {
+		for (ml = c->methods; ml->ml_name != NULL; ml++)
+			n++;
+	}
+	v = PyList_New(n);
+	if (v == NULL)
+		return NULL;
+	i = 0;
+	for (c = chain; c != NULL; c = c->link) {
+		for (ml = c->methods; ml->ml_name != NULL; ml++) {
+			PyList_SetItem(v, i, PyString_FromString(ml->ml_name));
+			i++;
+		}
+	}
+	if (PyErr_Occurred()) {
+		Py_DECREF(v);
+		return NULL;
+	}
+	PyList_Sort(v);
+	return v;
+}
+
+/* Find a method in a method chain */
+
+PyObject *
+Py_FindMethodInChain(PyMethodChain *chain, PyObject *self, const char *name)
+{
+	if (name[0] == '_' && name[1] == '_') {
+		if (strcmp(name, "__methods__") == 0) {
+			if (PyErr_WarnPy3k("__methods__ not supported in 3.x",
+					   1) < 0)
+				return NULL;
+			return listmethodchain(chain);
+		}
+		if (strcmp(name, "__doc__") == 0) {
+			const char *doc = self->ob_type->tp_doc;
+			if (doc != NULL)
+				return PyString_FromString(doc);
+		}
+	}
+	while (chain != NULL) {
+		PyMethodDef *ml = chain->methods;
+		for (; ml->ml_name != NULL; ml++) {
+			if (name[0] == ml->ml_name[0] &&
+			    strcmp(name+1, ml->ml_name+1) == 0)
+				/* XXX */
+				return PyCFunction_New(ml, self);
+		}
+		chain = chain->link;
+	}
+	PyErr_SetString(PyExc_AttributeError, name);
+	return NULL;
+}
+
+/* Find a method in a single method list */
+
+PyObject *
+Py_FindMethod(PyMethodDef *methods, PyObject *self, const char *name)
+{
+	PyMethodChain chain;
+	chain.methods = methods;
+	chain.link = NULL;
+	return Py_FindMethodInChain(&chain, self, name);
+}
+
+/* Clear out the free list */
+
+int
+PyCFunction_ClearFreeList(void)
+{
+	int freelist_size = numfree;
+	
+	while (free_list) {
+		PyCFunctionObject *v = free_list;
+		free_list = (PyCFunctionObject *)(v->m_self);
+		PyObject_GC_Del(v);
+		numfree--;
+	}
+	assert(numfree == 0);
+	return freelist_size;
+}
+
+void
+PyCFunction_Fini(void)
+{
+	(void)PyCFunction_ClearFreeList();
+}
+
+/* PyCFunction_New() is now just a macro that calls PyCFunction_NewEx(),
+   but it's part of the API so we need to keep a function around that
+   existing C extensions can call.
+*/
+
+#undef PyCFunction_New
+PyAPI_FUNC(PyObject *) PyCFunction_New(PyMethodDef *, PyObject *);
+
+PyObject *
+PyCFunction_New(PyMethodDef *ml, PyObject *self)
+{
+	return PyCFunction_NewEx(ml, self, NULL);
+}