/*********************************************************** 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. ******************************************************************/ /* Module object implementation */ #include "Python.h" typedef struct { PyObject_HEAD PyObject *md_dict; } PyModuleObject; PyObject * PyModule_New(name) 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(m) PyObject *m; { if (!PyModule_Check(m)) { PyErr_BadInternalCall(); return NULL; } return ((PyModuleObject *)m) -> md_dict; } char * PyModule_GetName(m) 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); } void _PyModule_Clear(m) 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) fprintf(stderr, "# 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) fprintf(stderr, "# 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(m) PyModuleObject *m; { if (m->md_dict != NULL) { _PyModule_Clear((PyObject *)m); Py_DECREF(m->md_dict); } free((char *)m); } static PyObject * module_repr(m) PyModuleObject *m; { char buf[100]; char *name = PyModule_GetName((PyObject *)m); if (name == NULL) { PyErr_Clear(); name = "?"; } sprintf(buf, "<module '%.80s'>", name); return PyString_FromString(buf); } static PyObject * module_getattr(m, name) 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(m, name, v) 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*/ };