/* def adapter_hook(self, provided, object, name=u'', default=None): required = providedBy(object) cache = self._getcache(provided, name) factory = cache.get(required, _not_in_mapping) if factory is _not_in_mapping: factory = self.lookup((required, ), provided, name) if factory is not None: result = factory(object) if result is not None: return result return default */ static PyObject * _adapter_hook(lookup *self, PyObject *provided, PyObject *object, PyObject *name, PyObject *default_) { PyObject *required, *factory, *result; required = providedBy(NULL, object); if (required == NULL) return NULL; factory = _lookup1(self, required, provided, name, Py_None); Py_DECREF(required); if (factory == NULL) return NULL; if (factory != Py_None) { result = PyObject_CallFunctionObjArgs(factory, object, NULL); Py_DECREF(factory); if (result == NULL || result != Py_None) return result; } else result = factory; /* None */ if (default_ == NULL || default_ == result) /* No default specified, */ return result; /* Return None. result is owned None */ Py_DECREF(result); Py_INCREF(default_); return default_; }
/* def adapter_hook(self, provided, object, name=u'', default=None): required = providedBy(object) cache = self._getcache(provided, name) factory = cache.get(required, _not_in_mapping) if factory is _not_in_mapping: factory = self.lookup((required, ), provided, name) if factory is not None: result = factory(object) if result is not None: return result return default */ static PyObject * _adapter_hook(lookup *self, PyObject *provided, PyObject *object, PyObject *name, PyObject *default_) { PyObject *required, *factory, *result; #ifdef PY3K if ( name && !PyUnicode_Check(name) ) #else if ( name && !PyString_Check(name) && !PyUnicode_Check(name) ) #endif { PyErr_SetString(PyExc_ValueError, "name is not a string or unicode"); return NULL; } required = providedBy(NULL, object); if (required == NULL) return NULL; factory = _lookup1(self, required, provided, name, Py_None); Py_DECREF(required); if (factory == NULL) return NULL; if (factory != Py_None) { result = PyObject_CallFunctionObjArgs(factory, object, NULL); Py_DECREF(factory); if (result == NULL || result != Py_None) return result; } else result = factory; /* None */ if (default_ == NULL || default_ == result) /* No default specified, */ return result; /* Return None. result is owned None */ Py_DECREF(result); Py_INCREF(default_); return default_; }
static PyObject * Spec_providedBy(PyObject *self, PyObject *ob) { PyObject *decl, *item; decl = providedBy(NULL, ob); if (decl == NULL) return NULL; if (PyObject_TypeCheck(decl, &SpecType)) item = Spec_extends(decl, self); else /* decl is probably a security proxy. We have to go the long way around. */ item = PyObject_CallFunctionObjArgs(decl, self, NULL); Py_DECREF(decl); return item; }
/* def __adapt__(self, obj): """Adapt an object to the reciever """ if self.providedBy(obj): return obj for hook in adapter_hooks: adapter = hook(self, obj) if adapter is not None: return adapter */ static PyObject * __adapt__(PyObject *self, PyObject *obj) { PyObject *decl, *args, *adapter; int implements, i, l; decl = providedBy(NULL, obj); if (decl == NULL) return NULL; if (PyObject_TypeCheck(decl, &SpecType)) { PyObject *implied; implied = inst_attr(decl, str_implied); if (implied == NULL) { Py_DECREF(decl); return NULL; } implements = PyDict_GetItem(implied, self) != NULL; Py_DECREF(decl); } else { /* decl is probably a security proxy. We have to go the long way around. */ PyObject *r; r = PyObject_CallFunctionObjArgs(decl, self, NULL); Py_DECREF(decl); if (r == NULL) return NULL; implements = PyObject_IsTrue(r); Py_DECREF(r); } if (implements) { Py_INCREF(obj); return obj; } l = PyList_GET_SIZE(adapter_hooks); args = PyTuple_New(2); if (args == NULL) return NULL; Py_INCREF(self); PyTuple_SET_ITEM(args, 0, self); Py_INCREF(obj); PyTuple_SET_ITEM(args, 1, obj); for (i = 0; i < l; i++) { adapter = PyObject_CallObject(PyList_GET_ITEM(adapter_hooks, i), args); if (adapter == NULL || adapter != Py_None) { Py_DECREF(args); return adapter; } Py_DECREF(adapter); } Py_DECREF(args); Py_INCREF(Py_None); return Py_None; }