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| @if PY_MAJOR_VERSION >= 3
@define PYINT(i) PyLong_AsLong(i)
@define PYINTCHECK(i) PyLong_Check(i)
@else
@define PYINT(i) PyInt_AsLong(i)
@define PYINTCHECK(i) PyInt_Check(i)
@endif
int py_scalar_init (scalar s, PyObject * f) {
if (!PyCallable_Check(f)) {
fprintf (stderr, "parameter must be callable\n");
return -1;
}
@if PY_MAJOR_VERSION >= 3
PyObject * code = PyObject_GetAttrString (f, "__code__");
@else
PyObject * code = PyObject_GetAttrString (f, "func_code");
@endif
PyObject * nargs = PyObject_GetAttrString (code, "co_argcount");
Py_DECREF (code);
int n = PYINT (nargs);
Py_DECREF (nargs);
char * format = (n == 0 ? "()" :
n == 1 ? "(d)" :
n == 2 ? "(dd)" :
n == 3 ? "(ddd)" :
"(error)");
double status = 0;
foreach(reduction(min:status))
if (!status) {
PyObject * arglist = Py_BuildValue (format, x, y); // z
PyObject * result = PyEval_CallObject (f, arglist);
Py_DECREF (arglist);
if (result == NULL)
status = -1;
else {
s[] = PyFloat_AsDouble (result);
Py_DECREF (result);
}
}
return status;
}
typedef struct {
PyObject * i, * t, * action;
} PyEvent;
static double get_double (PyObject * item) {
if (PyFloat_Check (item))
return PyFloat_AsDouble (item);
else if (PYINTCHECK (item))
return PYINT (item);
else {
fprintf (stderr, "expecting a float\n");
exit (1);
}
return 0;
}
static int py_start (int * i, double * t, Event * ev) {
PyEvent * p = ev->data;
if (p->i != Py_None) {
if (PYINTCHECK (p->i))
*i = PYINT (p->i);
else {
PyObject * item = PySequence_GetItem (p->i, (ev->a = 0));
if (!item || !PYINTCHECK(item)) {
fprintf (stderr, "expecting an integer\n");
exit (1);
}
*i = PYINT (item);
Py_DECREF (item);
}
}
else {
if (PyFloat_Check (p->t))
*t = PyFloat_AsDouble (p->t);
else if (PYINTCHECK (p->t))
*t = PYINT (p->t);
else {
PyObject * item = PySequence_GetItem (p->t, (ev->a = 0));
if (!item) {
fprintf (stderr, "expecting a float\n");
exit (1);
}
*t = get_double (item);
Py_DECREF (item);
}
}
return 0;
}
static int py_end (int * i, double * t, Event * ev) {
PyEvent * p = ev->data;
if (p->i != Py_None)
return ev->a < PySequence_Size (p->i);
else
return ev->a < PySequence_Size (p->t);
}
static int py_inc (int * i, double * t, Event * ev) {
PyEvent * p = ev->data;
ev->a++;
if (p->i != Py_None) {
if (ev->a < PySequence_Size (p->i)) {
PyObject * item = PySequence_GetItem (p->i, ev->a);
*i = PYINT (item);
Py_DECREF (item);
}
else
(*i)++;
}
else {
if (ev->a < PySequence_Size (p->t)) {
PyObject * item = PySequence_GetItem (p->t, ev->a);
*t = get_double (item);
Py_DECREF (item);
}
else
(*t)++;
}
return 0;
}
static int py_action (const int i, const double t, Event * ev) {
PyEvent * p = ev->data;
PyObject * arglist = Py_BuildValue ("(id)", i, t);
PyObject * result = PyEval_CallObject (p->action, arglist);
Py_DECREF (arglist);
if (result == NULL)
return 0;
Py_DECREF (result);
return 0;
}
int py_register_event (PyObject * action, PyObject * i, PyObject * t) {
if (!PyCallable_Check(action)) {
fprintf (stderr, "parameter must be callable\n");
return -1;
}
Event ev;
ev.last = false;
ev.action = py_action;
ev.arrayi = NULL;
ev.arrayt = NULL;
PyObject * code = PyObject_GetAttrString (action, "__code__");
PyObject * file = PyObject_GetAttrString (code, "co_filename");
@if PY_MAJOR_VERSION >= 3
PyObject * temp_bytes = PyUnicode_AsEncodedString(file, "UTF-8", "strict");
ev.file = strdup (PyBytes_AsString (temp_bytes));
Py_DECREF(temp_bytes);
@else
ev.file = strdup (PyString_AsString (file));
@endif
Py_DECREF (file);
PyObject * lineno = PyObject_GetAttrString (code, "co_firstlineno");
ev.line = PYINT (lineno);
Py_DECREF (lineno);
@if PY_MAJOR_VERSION >= 3
PyObject * name = PyObject_GetAttrString (action, "__name__");
PyObject * temp_bytes2 = PyUnicode_AsEncodedString(name, "UTF-8", "strict");
ev.name = strdup (PyBytes_AsString (temp_bytes2));
Py_DECREF(temp_bytes2);
@else
PyObject * name = PyObject_GetAttrString (action, "func_name");
ev.name = strdup (PyString_AsString (name));
@endif
Py_DECREF (name);
ev.a = 0;
if (i != Py_None && !PySequence_Check(i) && !PYINTCHECK(i)) {
fprintf (stderr, "parameter i must be a sequence or an int\n");
exit (1);
}
if (t != Py_None && !PySequence_Check(t) && !PyFloat_Check(t)) {
fprintf (stderr, "parameter t must be a sequence or a float\n");
exit (1);
}
if (PYINTCHECK(i) || PyFloat_Check(t)) {
ev.expr[0] = py_start;
ev.nexpr = 1;
}
else { // sequence
ev.expr[0] = py_end; ev.expr[1] = py_start; ev.expr[2] = py_inc;
ev.nexpr = 3;
}
// fixme: memory should be freed before exit
PyEvent * p = ev.data = malloc (sizeof (PyEvent));
p->i = i; Py_INCREF (i);
p->t = t; Py_INCREF (t);
p->action = action; Py_INCREF (action);
event_register (ev);
return 0;
}
|