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https://github.com/python/cpython.git
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293 lines
6.5 KiB
C
293 lines
6.5 KiB
C
/***********************************************************
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Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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The Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI or Corporation for National Research Initiatives or
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CNRI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior
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permission.
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While CWI is the initial source for this software, a modified version
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is made available by the Corporation for National Research Initiatives
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(CNRI) at the Internet address ftp://ftp.python.org.
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STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* Method object implementation */
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#include "Python.h"
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#include "token.h"
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static PyCFunctionObject *free_list = NULL;
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PyObject *
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PyCFunction_New(ml, self)
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PyMethodDef *ml;
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PyObject *self;
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{
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PyCFunctionObject *op;
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op = free_list;
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if (op != NULL) {
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free_list = (PyCFunctionObject *)(op->m_self);
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op->ob_type = &PyCFunction_Type;
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_Py_NewReference(op);
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}
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else {
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op = PyObject_NEW(PyCFunctionObject, &PyCFunction_Type);
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if (op == NULL)
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return NULL;
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}
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op->m_ml = ml;
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Py_XINCREF(self);
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op->m_self = self;
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return (PyObject *)op;
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}
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PyCFunction
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PyCFunction_GetFunction(op)
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PyObject *op;
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{
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if (!PyCFunction_Check(op)) {
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PyErr_BadInternalCall();
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return NULL;
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}
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return ((PyCFunctionObject *)op) -> m_ml -> ml_meth;
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}
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PyObject *
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PyCFunction_GetSelf(op)
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PyObject *op;
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{
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if (!PyCFunction_Check(op)) {
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PyErr_BadInternalCall();
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return NULL;
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}
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return ((PyCFunctionObject *)op) -> m_self;
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}
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int
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PyCFunction_GetFlags(op)
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PyObject *op;
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{
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if (!PyCFunction_Check(op)) {
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PyErr_BadInternalCall();
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return -1;
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}
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return ((PyCFunctionObject *)op) -> m_ml -> ml_flags;
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}
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/* Methods (the standard built-in methods, that is) */
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static void
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meth_dealloc(m)
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PyCFunctionObject *m;
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{
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Py_XDECREF(m->m_self);
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m->m_self = (PyObject *)free_list;
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free_list = m;
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}
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static PyObject *
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meth_getattr(m, name)
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PyCFunctionObject *m;
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char *name;
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{
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if (strcmp(name, "__name__") == 0) {
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return PyString_FromString(m->m_ml->ml_name);
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}
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if (strcmp(name, "__doc__") == 0) {
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char *doc = m->m_ml->ml_doc;
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if (doc != NULL)
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return PyString_FromString(doc);
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Py_INCREF(Py_None);
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return Py_None;
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}
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if (strcmp(name, "__self__") == 0) {
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PyObject *self;
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if (PyEval_GetRestricted()) {
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PyErr_SetString(PyExc_RuntimeError,
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"method.__self__ not accessible in restricted mode");
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return NULL;
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}
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self = m->m_self;
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if (self == NULL)
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self = Py_None;
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Py_INCREF(self);
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return self;
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}
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if (strcmp(name, "__members__") == 0) {
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return Py_BuildValue("[sss]",
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"__doc__", "__name__", "__self__");
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}
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PyErr_SetString(PyExc_AttributeError, name);
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return NULL;
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}
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static PyObject *
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meth_repr(m)
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PyCFunctionObject *m;
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{
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char buf[200];
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if (m->m_self == NULL)
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sprintf(buf, "<built-in function %.80s>", m->m_ml->ml_name);
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else
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sprintf(buf,
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"<built-in method %.80s of %.80s object at %lx>",
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m->m_ml->ml_name, m->m_self->ob_type->tp_name,
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(long)m->m_self);
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return PyString_FromString(buf);
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}
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static int
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meth_compare(a, b)
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PyCFunctionObject *a, *b;
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{
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if (a->m_self != b->m_self)
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return (a->m_self < b->m_self) ? -1 : 1;
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if (a->m_ml->ml_meth == b->m_ml->ml_meth)
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return 0;
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if (strcmp(a->m_ml->ml_name, b->m_ml->ml_name) < 0)
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return -1;
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else
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return 1;
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}
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static long
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meth_hash(a)
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PyCFunctionObject *a;
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{
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long x;
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if (a->m_self == NULL)
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x = 0;
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else {
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x = PyObject_Hash(a->m_self);
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if (x == -1)
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return -1;
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}
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return x ^ (long) a->m_ml->ml_meth;
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}
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PyTypeObject PyCFunction_Type = {
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PyObject_HEAD_INIT(&PyType_Type)
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0,
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"builtin_function_or_method",
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sizeof(PyCFunctionObject),
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0,
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(destructor)meth_dealloc, /*tp_dealloc*/
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0, /*tp_print*/
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(getattrfunc)meth_getattr, /*tp_getattr*/
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0, /*tp_setattr*/
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(cmpfunc)meth_compare, /*tp_compare*/
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(reprfunc)meth_repr, /*tp_repr*/
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0, /*tp_as_number*/
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0, /*tp_as_sequence*/
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0, /*tp_as_mapping*/
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(hashfunc)meth_hash, /*tp_hash*/
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};
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/* List all methods in a chain -- helper for findmethodinchain */
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static PyObject *
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listmethodchain(chain)
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PyMethodChain *chain;
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{
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PyMethodChain *c;
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PyMethodDef *ml;
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int i, n;
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PyObject *v;
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n = 0;
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for (c = chain; c != NULL; c = c->link) {
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for (ml = c->methods; ml->ml_name != NULL; ml++)
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n++;
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}
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v = PyList_New(n);
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if (v == NULL)
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return NULL;
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i = 0;
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for (c = chain; c != NULL; c = c->link) {
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for (ml = c->methods; ml->ml_name != NULL; ml++) {
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PyList_SetItem(v, i, PyString_FromString(ml->ml_name));
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i++;
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}
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}
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if (PyErr_Occurred()) {
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Py_DECREF(v);
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return NULL;
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}
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PyList_Sort(v);
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return v;
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}
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/* Find a method in a method chain */
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PyObject *
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Py_FindMethodInChain(chain, self, name)
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PyMethodChain *chain;
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PyObject *self;
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char *name;
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{
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if (name[0] == '_' && name[1] == '_') {
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if (strcmp(name, "__methods__") == 0)
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return listmethodchain(chain);
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if (strcmp(name, "__doc__") == 0) {
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char *doc = self->ob_type->tp_doc;
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if (doc != NULL)
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return PyString_FromString(doc);
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}
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}
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while (chain != NULL) {
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PyMethodDef *ml = chain->methods;
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for (; ml->ml_name != NULL; ml++) {
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if (name[0] == ml->ml_name[0] &&
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strcmp(name+1, ml->ml_name+1) == 0)
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return PyCFunction_New(ml, self);
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}
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chain = chain->link;
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}
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PyErr_SetString(PyExc_AttributeError, name);
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return NULL;
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}
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/* Find a method in a single method list */
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PyObject *
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Py_FindMethod(methods, self, name)
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PyMethodDef *methods;
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PyObject *self;
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char *name;
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{
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PyMethodChain chain;
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chain.methods = methods;
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chain.link = NULL;
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return Py_FindMethodInChain(&chain, self, name);
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}
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/* Clear out the free list */
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void
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PyCFunction_Fini()
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{
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while (free_list) {
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PyCFunctionObject *v = free_list;
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free_list = (PyCFunctionObject *)(v->m_self);
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PyMem_DEL(v);
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}
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}
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