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- /***********************************************************
- Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
- The Netherlands.
-
- All Rights Reserved
-
- Permission to use, copy, modify, and distribute this software and its
- documentation for any purpose and without fee is hereby granted,
- provided that the above copyright notice appear in all copies and that
- both that copyright notice and this permission notice appear in
- supporting documentation, and that the names of Stichting Mathematisch
- Centrum or CWI or Corporation for National Research Initiatives or
- CNRI not be used in advertising or publicity pertaining to
- distribution of the software without specific, written prior
- permission.
-
- While CWI is the initial source for this software, a modified version
- is made available by the Corporation for National Research Initiatives
- (CNRI) at the Internet address ftp://ftp.python.org.
-
- STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
- REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
- MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
- CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
- DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
- PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
- TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- PERFORMANCE OF THIS SOFTWARE.
-
- ******************************************************************/
-
- /* Method object implementation */
-
- #include "Python.h"
-
- #include "token.h"
-
- #include "protos/methodobject.h"
-
- static PyCFunctionObject *free_list = NULL;
-
- PyObject *
- PyCFunction_New(ml, self)
- PyMethodDef *ml;
- PyObject *self;
- {
- PyCFunctionObject *op;
- op = free_list;
- if (op != NULL) {
- free_list = (PyCFunctionObject *)(op->m_self);
- op->ob_type = &PyCFunction_Type;
- _Py_NewReference(op);
- }
- else {
- op = PyObject_NEW(PyCFunctionObject, &PyCFunction_Type);
- if (op == NULL)
- return NULL;
- }
- op->m_ml = ml;
- Py_XINCREF(self);
- op->m_self = self;
- return (PyObject *)op;
- }
-
- PyCFunction
- PyCFunction_GetFunction(op)
- PyObject *op;
- {
- if (!PyCFunction_Check(op)) {
- PyErr_BadInternalCall();
- return NULL;
- }
- return ((PyCFunctionObject *)op) -> m_ml -> ml_meth;
- }
-
- PyObject *
- PyCFunction_GetSelf(op)
- PyObject *op;
- {
- if (!PyCFunction_Check(op)) {
- PyErr_BadInternalCall();
- return NULL;
- }
- return ((PyCFunctionObject *)op) -> m_self;
- }
-
- int
- PyCFunction_GetFlags(op)
- 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(m)
- PyCFunctionObject *m;
- {
- Py_XDECREF(m->m_self);
- m->m_self = (PyObject *)free_list;
- free_list = m;
- }
-
- static PyObject *
- meth_getattr(m, name)
- 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(m)
- 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 %lx>",
- m->m_ml->ml_name, m->m_self->ob_type->tp_name,
- (long)m->m_self);
- return PyString_FromString(buf);
- }
-
- static int
- meth_compare(a, b)
- PyCFunctionObject *a, *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(a)
- PyCFunctionObject *a;
- {
- long x;
- if (a->m_self == NULL)
- x = 0;
- else {
- x = PyObject_Hash(a->m_self);
- if (x == -1)
- return -1;
- }
- return x ^ (long) a->m_ml->ml_meth;
- }
-
- PyTypeObject PyCFunction_Type = {
- PyObject_HEAD_INIT(&PyType_Type)
- 0,
- "builtin_function_or_method",
- sizeof(PyCFunctionObject),
- 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*/
- };
-
- /* List all methods in a chain -- helper for findmethodinchain */
-
- static PyObject *
- listmethodchain(chain)
- 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(chain, self, name)
- 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(methods, self, name)
- 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()
- {
- while (free_list) {
- PyCFunctionObject *v = free_list;
- free_list = (PyCFunctionObject *)(v->m_self);
- PyMem_DEL(v);
- }
- }
-