forked from bartvdbraak/blender
6ffc988ae3
The expression module now uses an EXP prefix and it follows a distribution similar to blender. Additionally the hash function in EXP_HashedPtr.h was simplified and the files EXP_C-Api.h &.EXP_C-Api.cpp were deleted because were unused. Reviewers: campbellbarton, moguri, sybren, hg1 Projects: #game_engine Differential Revision: https://developer.blender.org/D1221
120 lines
4.0 KiB
C++
120 lines
4.0 KiB
C++
/*
|
|
* ***** BEGIN GPL LICENSE BLOCK *****
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*
|
|
* Contributor(s): Porteries Tristan.
|
|
*
|
|
* ***** END GPL LICENSE BLOCK *****
|
|
*/
|
|
|
|
/** \file gameengine/Expressions/intern/PythonCallBack.cpp
|
|
* \ingroup expressions
|
|
*/
|
|
|
|
#include "EXP_PythonCallBack.h"
|
|
#include <iostream>
|
|
#include <stdarg.h>
|
|
|
|
#include "BLI_alloca.h"
|
|
|
|
/** Check if a python value is a function and have the correct number of arguments.
|
|
* \param value The python value to check.
|
|
* \param minargcount The minimum of arguments possible.
|
|
* \param maxargcount The maximum of arguments possible.
|
|
* \param r_argcount The number of argument of this function, this variable will be
|
|
* changed in the function.
|
|
*/
|
|
static PyObject *CheckPythonFunction(PyObject *value, unsigned int minargcount, unsigned int maxargcount, unsigned int &r_argcount)
|
|
{
|
|
if (PyMethod_Check(value)) {
|
|
PyCodeObject *code = ((PyCodeObject *)PyFunction_GET_CODE(PyMethod_GET_FUNCTION(value)));
|
|
// *args support
|
|
r_argcount = (code->co_flags & CO_VARARGS) ? maxargcount : (code->co_argcount - 1);
|
|
}
|
|
else if (PyFunction_Check(value)) {
|
|
PyCodeObject *code = ((PyCodeObject *)PyFunction_GET_CODE(value));
|
|
// *args support
|
|
r_argcount = (code->co_flags & CO_VARARGS) ? maxargcount : code->co_argcount;
|
|
}
|
|
else { // is not a methode or a function
|
|
PyErr_Format(PyExc_TypeError, "items must be functions or methodes, not %s",
|
|
Py_TYPE(value)->tp_name);
|
|
return NULL;
|
|
}
|
|
|
|
if (r_argcount < minargcount || r_argcount > maxargcount) {
|
|
// wrong number of arguments
|
|
PyErr_Format(PyExc_TypeError, "methode or function (%s) has invalid number of arguments (%i) must be between %i and %i",
|
|
Py_TYPE(value)->tp_name, r_argcount, minargcount, maxargcount);
|
|
return NULL;
|
|
}
|
|
|
|
return value;
|
|
}
|
|
|
|
/** Create a python tuple to call a python function
|
|
* \param argcount The lenght of the tuple.
|
|
* \param arglist The fully list of python arguments [size >= argcount].
|
|
*/
|
|
static PyObject *CreatePythonTuple(unsigned int argcount, PyObject **arglist)
|
|
{
|
|
PyObject *tuple = PyTuple_New(argcount);
|
|
|
|
for (unsigned int i = 0; i < argcount; ++i) {
|
|
PyObject *item = arglist[i];
|
|
// increment reference and copy it in a new tuple
|
|
Py_INCREF(item);
|
|
PyTuple_SET_ITEM(tuple, i, item);
|
|
}
|
|
|
|
return tuple;
|
|
}
|
|
|
|
void RunPythonCallBackList(PyObject *functionlist, PyObject **arglist, unsigned int minargcount, unsigned int maxargcount)
|
|
{
|
|
unsigned int size = PyList_Size(functionlist);
|
|
PyObject **argTuples = (PyObject **)BLI_array_alloca(argTuples, maxargcount - minargcount + 1);
|
|
memset(argTuples, 0, sizeof(PyObject *) * (maxargcount - minargcount + 1));
|
|
|
|
for (unsigned int i = 0; i < size; ++i) {
|
|
unsigned int funcargcount = 0;
|
|
|
|
PyObject *item = PyList_GET_ITEM(functionlist, i);
|
|
PyObject *func = CheckPythonFunction(item, minargcount, maxargcount, funcargcount);
|
|
if (!func) { // this item fails the check
|
|
PyErr_Print();
|
|
PyErr_Clear();
|
|
continue;
|
|
}
|
|
|
|
// get correct argument tuple.
|
|
PyObject *tuple = argTuples[funcargcount - minargcount];
|
|
if (!tuple)
|
|
argTuples[funcargcount - minargcount] = tuple = CreatePythonTuple(funcargcount, arglist);
|
|
|
|
PyObject *ret = PyObject_Call(func, tuple, NULL);
|
|
if (!ret) { // if ret is NULL this seems that the function doesn't work !
|
|
PyErr_Print();
|
|
PyErr_Clear();
|
|
}
|
|
else
|
|
Py_DECREF(ret);
|
|
}
|
|
|
|
for (unsigned int i = 0; i <= (maxargcount - minargcount); ++i)
|
|
Py_XDECREF(argTuples[i]);
|
|
}
|