view PyParameterDescriptor.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 "PyParameterDescriptor.h"
#include "vamp-sdk/Plugin.h"
#include <string>
#include "PyTypeInterface.h"

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

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

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

/* New ParameterDescriptor object */ 
static PyObject *
ParameterDescriptor_new(PyTypeObject *type, PyObject *args, PyObject *kw)
{

	ParameterDescriptorObject *self = 
	(ParameterDescriptorObject*)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 (PyParameterDescriptor_CheckExact(arg))
			PyDict_Merge(self->dict,PyParameterDescriptor_AS_DICT(arg),0);
		else if (PyDict_CheckExact(arg)) 
			PyDict_Merge(self->dict,arg,0);
		else {
			PyErr_SetString(PyExc_TypeError, 
			"Object takes zero or one ParameterDescriptor or dictionary arguments.");
			return NULL; 
		}
	}
	return (PyObject *) self;
}


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


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


/* Get attributes */
static PyObject *
ParameterDescriptor_getattr(ParameterDescriptorObject *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 ParameterDescriptor attribute");
	}
	return NULL;
}


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

#define ParameterDescriptor_alloc PyType_GenericAlloc
#define ParameterDescriptor_free PyObject_Del

PyTypeObject ParameterDescriptor_Type = {
	PyObject_HEAD_INIT(NULL)
	0,						/*ob_size*/
	"vampy.ParameterDescriptor",/*tp_name*/
	sizeof(ParameterDescriptorObject),	/*tp_basicsize*/
	0,						/*tp_itemsize*/
	(destructor)ParameterDescriptorObject_dealloc, /*tp_dealloc*/
	0,						/*tp_print*/
	(getattrfunc)ParameterDescriptor_getattr, /*tp_getattr*/
	(setattrfunc)ParameterDescriptor_setattr, /*tp_setattr*/
	0,						/*tp_compare*/
	ParameterDescriptor_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*/
    ParameterDescriptor_alloc,/*tp_alloc*/
    ParameterDescriptor_new,/*tp_new*/
    ParameterDescriptor_free,/*tp_free*/
    0,                      /*tp_is_gc*/
};

/*		  		 	  PyParameterDescriptor C++ API    				*/