view PyOutputDescriptor.cpp @ 92:a6718f9fe942

If a module appears to redefine one of our own types, refuse to load it. Also clear out the class dict for all refused modules now, so that we don't get stale names on the next scan due to not having cleared the module on unload

/*

 * Vampy : This plugin is a wrapper around the Vamp plugin API.
 * It allows for writing Vamp plugins in Python.

 * Centre for Digital Music, Queen Mary University of London.
 * Copyright (C) 2008-2009 Gyorgy Fazekas, QMUL. (See Vamp sources 
 * for licence information.)

*/

#include <Python.h>
#include "PyOutputDescriptor.h"
#include "vamp-sdk/Plugin.h"
#include <string>
#include "PyTypeInterface.h"

using namespace std;
using namespace Vamp;
using Vamp::Plugin;

/*			 OutputDescriptor Object's Methods 					*/ 
//these objects have no callable methods

/*		   PyOutputDescriptor methods implementing protocols   	*/ 
// these functions are called by the interpreter automatically

/* New OutputDescriptor object */ 
static PyObject *
OutputDescriptor_new(PyTypeObject *type, PyObject *args, PyObject *kw)
{
	OutputDescriptorObject *self = 
	(OutputDescriptorObject*)type->tp_alloc(type, 0);
	
	if (self == NULL) return NULL;
    self->dict = PyDict_New();
	if (self->dict == NULL) return NULL;
    
	/// allow copying objects
    if (args && PyTuple_Size(args) == 1) {
		PyObject* arg = PyTuple_GET_ITEM(args,0);
		if (PyOutputDescriptor_CheckExact(arg))
			PyDict_Merge(self->dict,PyOutputDescriptor_AS_DICT(arg),0);
		else if (PyDict_CheckExact(arg)) 
			PyDict_Merge(self->dict,arg,0);
		else {
			PyErr_SetString(PyExc_TypeError, 
			"OutputDescriptor takes zero or one PyOutputDescriptor or dictionary arguments.");
			return NULL; 
		}
	}
	return (PyObject *) self;
}


/* DESTRUCTOR: delete type object */
static void
OutputDescriptorObject_dealloc(OutputDescriptorObject *self)
{
	Py_XDECREF(self->dict);
	PyObject_Del(self);
}


/* Set attributes */
static int
OutputDescriptor_setattr(OutputDescriptorObject *self, char *name, PyObject *v)
{
	if (v == NULL) {
		int rv = PyDict_DelItemString(self->dict, name);
		if (rv < 0)
			PyErr_SetString(PyExc_AttributeError,"non-existing OutputDescriptor attribute");
		return rv;
	}
	else
		return PyDict_SetItemString(self->dict, name, v);
}


/* Get attributes */
static PyObject *
OutputDescriptor_getattr(OutputDescriptorObject *self, char *name)
{
	if (self->dict != NULL) {
		PyObject *v = PyDict_GetItemString(self->dict, name);
		if (v != NULL) 
		{
			Py_INCREF(v);
			return v;
		}
		PyErr_SetString(PyExc_AttributeError,"non-existing OutputDescriptor attribute");
	}
	return NULL;
}


/* String representation */
static PyObject *
OutputDescriptor_repr(PyObject *self)
{
	OutputDescriptorObject* v = (OutputDescriptorObject*)self;
	if (v->dict) return PyDict_Type.tp_repr((PyObject *)v->dict);
	else return PyString_FromString("OutputDescriptor()");
}

#define OutputDescriptor_alloc PyType_GenericAlloc
#define OutputDescriptor_free PyObject_Del


/*						REAL-TIME TYPE OBJECT						*/

PyTypeObject OutputDescriptor_Type = {
	PyObject_HEAD_INIT(NULL)
	0,						/*ob_size*/
	"vampy.OutputDescriptor",/*tp_name*/
	sizeof(OutputDescriptorObject),	/*tp_basicsize*/
	0,						/*tp_itemsize*/
	(destructor)OutputDescriptorObject_dealloc, /*tp_dealloc*/
	0,						/*tp_print*/
	(getattrfunc)OutputDescriptor_getattr, /*tp_getattr*/
	(setattrfunc)OutputDescriptor_setattr, /*tp_setattr*/
	0,						/*tp_compare*/
	OutputDescriptor_repr,	/*tp_repr*/
	0,						/*tp_as_number*/
	0,						/*tp_as_sequence*/
	0,						/*tp_as_mapping*/
	0,						/*tp_hash*/
	0,                      /*tp_call*/
    0,                      /*tp_str*/
    0,                      /*tp_getattro*/
    0,                      /*tp_setattro*/
    0,                      /*tp_as_buffer*/
    Py_TPFLAGS_DEFAULT,     /*tp_flags*/
    0,                      /*tp_doc*/
    0,                      /*tp_traverse*/
    0,                      /*tp_clear*/
    0,                      /*tp_richcompare*/
    0,                      /*tp_weaklistoffset*/
    0,                      /*tp_iter*/
    0,                      /*tp_iternext*/
    0,				        /*tp_methods*/ //TypeObject Methods
    0,                      /*tp_members*/
    0,                      /*tp_getset*/
    0,                      /*tp_base*/
    0,                      /*tp_dict*/
    0,                      /*tp_descr_get*/
    0,                      /*tp_descr_set*/
    0,                      /*tp_dictoffset*/
    0,                      /*tp_init*/
    OutputDescriptor_alloc, /*tp_alloc*/
    OutputDescriptor_new,   /*tp_new*/
    OutputDescriptor_free,	/*tp_free*/
    0,                      /*tp_is_gc*/
};

/*		  		 	  PyOutputDescriptor C++ API    				*/