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270 lines (245 loc) · 5.54 KB
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Copy pathmethodobject.c
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270 lines (245 loc) · 5.54 KB
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/* Method object implementation */
#include "Python.h"
#include "token.h"
static PyCFunctionObject *free_list = NULL;
PyObject *
PyCFunction_New(PyMethodDef *ml, PyObject *self)
{
PyCFunctionObject *op;
op = free_list;
if (op != NULL) {
free_list = (PyCFunctionObject *)(op->m_self);
PyObject_INIT(op, &PyCFunction_Type);
}
else {
op = PyObject_NEW(PyCFunctionObject, &PyCFunction_Type);
if (op == NULL)
return NULL;
}
op->m_ml = ml;
Py_XINCREF(self);
op->m_self = self;
PyObject_GC_Init(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;
}
/* Methods (the standard built-in methods, that is) */
static void
meth_dealloc(PyCFunctionObject *m)
{
PyObject_GC_Fini(m);
Py_XDECREF(m->m_self);
m->m_self = (PyObject *)free_list;
free_list = m;
}
static int
meth_traverse(PyCFunctionObject *m, visitproc visit, void *arg)
{
if (m->m_self != NULL)
return visit(m->m_self, arg);
else
return 0;
}
static PyObject *
meth_getattr(PyCFunctionObject *m, char *name)
{
if (strcmp(name, "__name__") == 0) {
return PyString_FromString(m->m_ml->ml_name);
}
if (strcmp(name, "__doc__") == 0) {
char *doc = m->m_ml->ml_doc;
if (doc != NULL)
return PyString_FromString(doc);
Py_INCREF(Py_None);
return Py_None;
}
if (strcmp(name, "__self__") == 0) {
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;
}
if (strcmp(name, "__members__") == 0) {
return Py_BuildValue("[sss]",
"__doc__", "__name__", "__self__");
}
PyErr_SetString(PyExc_AttributeError, name);
return NULL;
}
static PyObject *
meth_repr(PyCFunctionObject *m)
{
char buf[200];
if (m->m_self == NULL)
sprintf(buf, "<built-in function %.80s>", m->m_ml->ml_name);
else
sprintf(buf,
"<built-in method %.80s of %.80s object at %p>",
m->m_ml->ml_name, m->m_self->ob_type->tp_name,
m->m_self);
return PyString_FromString(buf);
}
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 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 = {
PyObject_HEAD_INIT(&PyType_Type)
0,
"builtin_function_or_method",
sizeof(PyCFunctionObject) + PyGC_HEAD_SIZE,
0,
(destructor)meth_dealloc, /* tp_dealloc */
0, /* tp_print */
(getattrfunc)meth_getattr, /* 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 */
0, /* tp_call */
0, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_GC, /* tp_flags */
0, /* tp_doc */
(traverseproc)meth_traverse, /* tp_traverse */
};
/* 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, char *name)
{
if (name[0] == '_' && name[1] == '_') {
if (strcmp(name, "__methods__") == 0)
return listmethodchain(chain);
if (strcmp(name, "__doc__") == 0) {
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)
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, char *name)
{
PyMethodChain chain;
chain.methods = methods;
chain.link = NULL;
return Py_FindMethodInChain(&chain, self, name);
}
/* Clear out the free list */
void
PyCFunction_Fini(void)
{
while (free_list) {
PyCFunctionObject *v = free_list;
free_list = (PyCFunctionObject *)(v->m_self);
v = (PyCFunctionObject *) PyObject_AS_GC(v);
PyObject_DEL(v);
}
}