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/* $Id$ */
/*
* Python binding for the packet.c module.
*/
#include <Python.h>
#include <stdio.h>
#include "gpsd_config.h"
#include "gpsd.h"
void gpsd_report(int errlevel UNUSED, const char *fmt, ... )
/* stub logger -- we should allow redirecting this */
{
va_list ap;
va_start(ap, fmt);
(void)vfprintf(stderr, fmt, ap);
va_end(ap);
}
static PyObject *ErrorObject;
typedef struct {
PyObject_HEAD
struct gps_packet_t getter;
} GetterObject;
static PyTypeObject Getter_Type;
#define GetterObject_Check(v) ((v)->ob_type == &Getter_Type)
static GetterObject *
newGetterObject(PyObject *arg)
{
GetterObject *self;
self = PyObject_New(GetterObject, &Getter_Type);
if (self == NULL)
return NULL;
return self;
}
/* Getter methods */
static int
Getter_init(GetterObject *self)
{
packet_reset(&self->getter);
return 0;
}
static PyObject *
Getter_get(GetterObject *self, PyObject *args)
{
int fd;
ssize_t type;
if (!PyArg_ParseTuple(args, "i", &fd))
return NULL;
type = packet_get(fd, &self->getter);
return Py_BuildValue("(i, s)", type, self->getter.outbuffer);
}
static PyObject *
Getter_reset(GetterObject *self)
{
packet_reset(&self->getter);
return 0;
}
static void
Getter_dealloc(GetterObject *self)
{
PyObject_Del(self);
}
static PyMethodDef Getter_methods[] = {
{"get", (PyCFunction)Getter_get, METH_VARARGS,
PyDoc_STR("Get a packet from a file descriptor.")},
{"reset", (PyCFunction)Getter_reset, METH_NOARGS,
PyDoc_STR("Reset the packet getter to ground state.")},
{NULL, NULL} /* sentinel */
};
static PyObject *
Getter_getattr(GetterObject *self, char *name)
{
return Py_FindMethod(Getter_methods, (PyObject *)self, name);
}
static PyTypeObject Getter_Type = {
/* The ob_type field must be initialized in the module init function
* to be portable to Windows without using C++. */
PyObject_HEAD_INIT(NULL)
0, /*ob_size*/
"gpspacket.getter", /*tp_name*/
sizeof(GetterObject), /*tp_basicsize*/
0, /*tp_itemsize*/
/* methods */
(destructor)Getter_dealloc, /*tp_dealloc*/
0, /*tp_print*/
(getattrfunc)Getter_getattr, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
0, /*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*/
0, /*tp_members*/
0, /*tp_getset*/
0, /*tp_base*/
0, /*tp_dict*/
0, /*tp_descr_get*/
0, /*tp_descr_set*/
0, /*tp_dictoffset*/
(initproc)Getter_init, /*tp_init*/
0, /*tp_alloc*/
0, /*tp_new*/
0, /*tp_free*/
0, /*tp_is_gc*/
};
/* Function of no arguments returning new Getter object */
static PyObject *
gpspacket_new(PyObject *self, PyObject *args)
{
GetterObject *rv;
if (!PyArg_ParseTuple(args, ":new"))
return NULL;
rv = newGetterObject(args);
if (rv == NULL)
return NULL;
return (PyObject *)rv;
}
/* List of functions defined in the module */
static PyMethodDef gpspacket_methods[] = {
{"new", gpspacket_new, METH_VARARGS,
PyDoc_STR("new() -> new packet-getter object")},
{NULL, NULL} /* sentinel */
};
PyDoc_STRVAR(module_doc,
"Python binding of the libgpsd module for recognizing GPS packets.");
PyMODINIT_FUNC
initgpspacket(void)
{
PyObject *m;
/* Finalize the type object including setting type of the new type
* object; doing it here is required for portability to Windows
* without requiring C++. */
if (PyType_Ready(&Getter_Type) < 0)
return;
/* Create the module and add the functions */
m = Py_InitModule3("gpspacket", gpspacket_methods, module_doc);
/* Add some symbolic constants to the module */
if (ErrorObject == NULL) {
ErrorObject = PyErr_NewException("gpspacket.error", NULL, NULL);
if (ErrorObject == NULL)
return;
}
Py_INCREF(ErrorObject);
PyModule_AddObject(m, "error", ErrorObject);
PyModule_AddIntConstant(m, "BAD_PACKET", BAD_PACKET);
PyModule_AddIntConstant(m, "COMMENT_PACKET", COMMENT_PACKET);
PyModule_AddIntConstant(m, "NMEA_PACKET", NMEA_PACKET);
PyModule_AddIntConstant(m, "SIRF_PACKET", SIRF_PACKET);
PyModule_AddIntConstant(m, "ZODIAC_PACKET", ZODIAC_PACKET);
PyModule_AddIntConstant(m, "TSIP_PACKET", TSIP_PACKET);
PyModule_AddIntConstant(m, "EVERMORE_PACKET", EVERMORE_PACKET);
PyModule_AddIntConstant(m, "ITALK_PACKET", ITALK_PACKET);
PyModule_AddIntConstant(m, "RTCM_PACKET", RTCM_PACKET);
PyModule_AddIntConstant(m, "GARMIN_PACKET", GARMIN_PACKET);
}
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