Staging
v0.8.1
v0.8.1
https://github.com/python/cpython
Tip revision: 4f643ba5dbb3ff7e36ac1864f49c0778dc0f303d authored by cvs2svn on 05 September 2000, 20:15:25 UTC
This commit was manufactured by cvs2svn to create tag 'r20b1'.
This commit was manufactured by cvs2svn to create tag 'r20b1'.
Tip revision: 4f643ba
moduleobject.c
/* Module object implementation */
#include "Python.h"
typedef struct {
PyObject_HEAD
PyObject *md_dict;
} PyModuleObject;
PyObject *
PyModule_New(char *name)
{
PyModuleObject *m;
PyObject *nameobj;
m = PyObject_NEW(PyModuleObject, &PyModule_Type);
if (m == NULL)
return NULL;
nameobj = PyString_FromString(name);
m->md_dict = PyDict_New();
if (m->md_dict == NULL || nameobj == NULL)
goto fail;
if (PyDict_SetItemString(m->md_dict, "__name__", nameobj) != 0)
goto fail;
if (PyDict_SetItemString(m->md_dict, "__doc__", Py_None) != 0)
goto fail;
Py_DECREF(nameobj);
return (PyObject *)m;
fail:
Py_XDECREF(nameobj);
Py_DECREF(m);
return NULL;
}
PyObject *
PyModule_GetDict(PyObject *m)
{
if (!PyModule_Check(m)) {
PyErr_BadInternalCall();
return NULL;
}
return ((PyModuleObject *)m) -> md_dict;
}
char *
PyModule_GetName(PyObject *m)
{
PyObject *nameobj;
if (!PyModule_Check(m)) {
PyErr_BadArgument();
return NULL;
}
nameobj = PyDict_GetItemString(((PyModuleObject *)m)->md_dict,
"__name__");
if (nameobj == NULL || !PyString_Check(nameobj)) {
PyErr_SetString(PyExc_SystemError, "nameless module");
return NULL;
}
return PyString_AsString(nameobj);
}
char *
PyModule_GetFilename(PyObject *m)
{
PyObject *fileobj;
if (!PyModule_Check(m)) {
PyErr_BadArgument();
return NULL;
}
fileobj = PyDict_GetItemString(((PyModuleObject *)m)->md_dict,
"__file__");
if (fileobj == NULL || !PyString_Check(fileobj)) {
PyErr_SetString(PyExc_SystemError, "module filename missing");
return NULL;
}
return PyString_AsString(fileobj);
}
void
_PyModule_Clear(PyObject *m)
{
/* To make the execution order of destructors for global
objects a bit more predictable, we first zap all objects
whose name starts with a single underscore, before we clear
the entire dictionary. We zap them by replacing them with
None, rather than deleting them from the dictionary, to
avoid rehashing the dictionary (to some extent). */
int pos;
PyObject *key, *value;
PyObject *d;
d = ((PyModuleObject *)m)->md_dict;
/* First, clear only names starting with a single underscore */
pos = 0;
while (PyDict_Next(d, &pos, &key, &value)) {
if (value != Py_None && PyString_Check(key)) {
char *s = PyString_AsString(key);
if (s[0] == '_' && s[1] != '_') {
if (Py_VerboseFlag > 1)
PySys_WriteStderr("# clear[1] %s\n", s);
PyDict_SetItem(d, key, Py_None);
}
}
}
/* Next, clear all names except for __builtins__ */
pos = 0;
while (PyDict_Next(d, &pos, &key, &value)) {
if (value != Py_None && PyString_Check(key)) {
char *s = PyString_AsString(key);
if (s[0] != '_' || strcmp(s, "__builtins__") != 0) {
if (Py_VerboseFlag > 1)
PySys_WriteStderr("# clear[2] %s\n", s);
PyDict_SetItem(d, key, Py_None);
}
}
}
/* Note: we leave __builtins__ in place, so that destructors
of non-global objects defined in this module can still use
builtins, in particularly 'None'. */
}
/* Methods */
static void
module_dealloc(PyModuleObject *m)
{
if (m->md_dict != NULL) {
_PyModule_Clear((PyObject *)m);
Py_DECREF(m->md_dict);
}
PyObject_DEL(m);
}
static PyObject *
module_repr(PyModuleObject *m)
{
char buf[400];
char *name;
char *filename;
name = PyModule_GetName((PyObject *)m);
if (name == NULL) {
PyErr_Clear();
name = "?";
}
filename = PyModule_GetFilename((PyObject *)m);
if (filename == NULL) {
PyErr_Clear();
sprintf(buf, "<module '%.80s' (built-in)>", name);
} else {
sprintf(buf, "<module '%.80s' from '%.255s'>", name, filename);
}
return PyString_FromString(buf);
}
static PyObject *
module_getattr(PyModuleObject *m, char *name)
{
PyObject *res;
if (strcmp(name, "__dict__") == 0) {
Py_INCREF(m->md_dict);
return m->md_dict;
}
res = PyDict_GetItemString(m->md_dict, name);
if (res == NULL)
PyErr_SetString(PyExc_AttributeError, name);
else
Py_INCREF(res);
return res;
}
static int
module_setattr(PyModuleObject *m, char *name, PyObject *v)
{
if (name[0] == '_' && strcmp(name, "__dict__") == 0) {
PyErr_SetString(PyExc_TypeError,
"read-only special attribute");
return -1;
}
if (v == NULL) {
int rv = PyDict_DelItemString(m->md_dict, name);
if (rv < 0)
PyErr_SetString(PyExc_AttributeError,
"delete non-existing module attribute");
return rv;
}
else
return PyDict_SetItemString(m->md_dict, name, v);
}
PyTypeObject PyModule_Type = {
PyObject_HEAD_INIT(&PyType_Type)
0, /*ob_size*/
"module", /*tp_name*/
sizeof(PyModuleObject), /*tp_size*/
0, /*tp_itemsize*/
(destructor)module_dealloc, /*tp_dealloc*/
0, /*tp_print*/
(getattrfunc)module_getattr, /*tp_getattr*/
(setattrfunc)module_setattr, /*tp_setattr*/
0, /*tp_compare*/
(reprfunc)module_repr, /*tp_repr*/
};