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/* | ||
Copyright (c) 2003 Zope Corporation and Contributors. | ||
All Rights Reserved. | ||
This software is subject to the provisions of the Zope Public License, | ||
Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution. | ||
THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED | ||
WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | ||
WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS | ||
FOR A PARTICULAR PURPOSE. | ||
*/ | ||
static char _Persistence_module_documentation[] = | ||
"Persistent ExtensionClass\n" | ||
"\n" | ||
"$Id$\n" | ||
; | ||
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#include "ExtensionClass/ExtensionClass.h" | ||
#include "persistent/cPersistence.h" | ||
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/* convert_name() returns a new reference to a string name | ||
or sets an exception and returns NULL. | ||
*/ | ||
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static PyObject * | ||
convert_name(PyObject *name) | ||
{ | ||
#ifdef Py_USING_UNICODE | ||
/* The Unicode to string conversion is done here because the | ||
existing tp_setattro slots expect a string object as name | ||
and we wouldn't want to break those. */ | ||
if (PyUnicode_Check(name)) { | ||
name = PyUnicode_AsEncodedString(name, NULL, NULL); | ||
} | ||
else | ||
#endif | ||
if (!PyString_Check(name)) { | ||
PyErr_SetString(PyExc_TypeError, "attribute name must be a string"); | ||
return NULL; | ||
} else | ||
Py_INCREF(name); | ||
return name; | ||
} | ||
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/* Returns true if the object requires unghostification. | ||
There are several special attributes that we allow access to without | ||
requiring that the object be unghostified: | ||
__class__ | ||
__del__ | ||
__dict__ | ||
__of__ | ||
__setstate__ | ||
*/ | ||
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static int | ||
unghost_getattr(const char *s) | ||
{ | ||
if (*s++ != '_') | ||
return 1; | ||
if (*s == 'p') { | ||
s++; | ||
if (*s == '_') | ||
return 0; /* _p_ */ | ||
else | ||
return 1; | ||
} | ||
else if (*s == '_') { | ||
s++; | ||
switch (*s) { | ||
case 'c': | ||
return strcmp(s, "class__"); | ||
case 'd': | ||
s++; | ||
if (!strcmp(s, "el__")) | ||
return 0; /* __del__ */ | ||
if (!strcmp(s, "ict__")) | ||
return 0; /* __dict__ */ | ||
return 1; | ||
case 'o': | ||
return strcmp(s, "of__"); | ||
case 's': | ||
return strcmp(s, "setstate__"); | ||
default: | ||
return 1; | ||
} | ||
} | ||
return 1; | ||
} | ||
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static PyObject * | ||
P_getattr(cPersistentObject *self, PyObject *name) | ||
{ | ||
PyObject *v=NULL; | ||
char *s; | ||
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name = convert_name(name); | ||
if (!name) | ||
return NULL; | ||
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s = PyString_AS_STRING(name); | ||
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if (*s != '_' || unghost_getattr(s)) | ||
{ | ||
if (PER_USE(self)) | ||
{ | ||
v = Py_FindAttr((PyObject*)self, name); | ||
PER_ALLOW_DEACTIVATION(self); | ||
PER_ACCESSED(self); | ||
} | ||
} | ||
else | ||
v = Py_FindAttr((PyObject*)self, name); | ||
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Py_DECREF(name); | ||
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return v; | ||
} | ||
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static PyTypeObject Ptype = { | ||
PyObject_HEAD_INIT(NULL) | ||
/* ob_size */ 0, | ||
/* tp_name */ "Persistence.Persistent", | ||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | ||
/* tp_getattro */ (getattrofunc)P_getattr, | ||
0, 0, | ||
/* tp_flags */ Py_TPFLAGS_DEFAULT | ||
| Py_TPFLAGS_BASETYPE , | ||
/* tp_doc */ "Persistent ExtensionClass", | ||
}; | ||
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static struct PyMethodDef _Persistence_methods[] = { | ||
{NULL, (PyCFunction)NULL, 0, NULL} /* sentinel */ | ||
}; | ||
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#ifndef PyMODINIT_FUNC /* declarations for DLL import/export */ | ||
#define PyMODINIT_FUNC void | ||
#endif | ||
PyMODINIT_FUNC | ||
init_Persistence(void) | ||
{ | ||
PyObject *m; | ||
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if (! ExtensionClassImported) | ||
return; | ||
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cPersistenceCAPI = PyCObject_Import("persistent.cPersistence", "CAPI"); | ||
if (cPersistenceCAPI == NULL) | ||
return; | ||
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Ptype.tp_bases = Py_BuildValue("OO", cPersistenceCAPI->pertype, ECBaseType); | ||
if (Ptype.tp_bases == NULL) | ||
return; | ||
Ptype.tp_base = cPersistenceCAPI->pertype; | ||
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Ptype.ob_type = ECExtensionClassType; | ||
if (PyType_Ready(&Ptype) < 0) | ||
return; | ||
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/* Create the module and add the functions */ | ||
m = Py_InitModule3("_Persistence", _Persistence_methods, | ||
_Persistence_module_documentation); | ||
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if (m == NULL) | ||
return; | ||
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/* Add types: */ | ||
if (PyModule_AddObject(m, "Persistent", (PyObject *)&Ptype) < 0) | ||
return; | ||
} | ||
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