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/*
* This file is part of the sigrok project.
*
* Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
*
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <sigrokdecode.h> /* First, so we avoid a _POSIX_C_SOURCE warning. */
#include <stdio.h>
/**
* Initialize libsigrokdecode.
*
* @return 0 upon success, non-zero otherwise.
*/
int sigrokdecode_init(void)
{
/* Py_Initialize() returns void and usually cannot fail. */
Py_Initialize();
/* FIXME */
PySys_SetPath("decode/scripts");
return 0;
}
/**
* TODO
*
* @param name TODO
* @return 0 upon success, non-zero otherwise.
*/
int sigrokdecode_load_decoder_file(const char *name)
{
/* TODO */
return 0;
}
/**
* Run the specified decoder function.
*
* @param decodername TODO
* @param inbuf TODO
* @param inbuflen TODO
* @param outbuf TODO
* @param outbuflen TODO
* @return 0 upon success, non-zero otherwise.
*/
int sigrokdecode_run_decoder(const char *decodername, uint8_t *inbuf,
uint64_t inbuflen, uint8_t **outbuf,
uint64_t *outbuflen)
{
const char *decoder_filename = "transitioncounter"; /* FIXME */
PyObject *py_name, *py_module, *py_func, *py_args;
PyObject *py_value, *py_result;
int ret;
/* TODO: Use #defines for the return codes. */
/* Return an error upon unusable input. */
if (decodername == NULL)
return -1;
if (inbuf == NULL)
return -2;
if (inbuflen == 0) /* No point in working on empty buffers. */
return -3;
if (outbuf == NULL)
return -4;
if (outbuflen == NULL)
return -5;
/* Get the name of the decoder module/file as Python string. */
if (!(py_name = PyString_FromString(decoder_filename))) {
PyErr_Print();
return -6;
}
/* "Import" the python file/module. */
if (!(py_module = PyImport_Import(py_name))) {
PyErr_Print();
Py_DECREF(py_name);
return -7;
}
Py_DECREF(py_name);
/* Get the decoder/function name as Python callable object. */
py_func = PyObject_GetAttrString(py_module, decodername);
if (!py_func || !PyCallable_Check(py_func)) {
if (PyErr_Occurred())
PyErr_Print();
Py_DECREF(py_module);
return -8;
}
/* Create a Python tuple of size 1. */
if (!(py_args = PyTuple_New(1))) {
PyErr_Print();
Py_DECREF(py_func);
Py_DECREF(py_module);
return -9;
}
/* Get the input buffer as Python "string" (byte array). */
/* TODO: int vs. uint64_t for 'inbuflen'? */
if (!(py_value = Py_BuildValue("s#", inbuf, inbuflen))) {
PyErr_Print();
Py_DECREF(py_args);
Py_DECREF(py_func);
Py_DECREF(py_module);
return -10;
}
if (PyTuple_SetItem(py_args, 0, py_value) != 0) {
PyErr_Print();
Py_DECREF(py_value);
Py_DECREF(py_args);
Py_DECREF(py_func);
Py_DECREF(py_module);
return -11;
}
if (!(py_result = PyObject_CallObject(py_func, py_args))) {
PyErr_Print();
Py_DECREF(py_value);
Py_DECREF(py_args);
Py_DECREF(py_func);
Py_DECREF(py_module);
return -12;
}
if ((ret = PyObject_AsCharBuffer(py_result, (const char **)outbuf,
(Py_ssize_t *)outbuflen))) {
PyErr_Print();
Py_DECREF(py_result);
Py_DECREF(py_value);
Py_DECREF(py_args);
Py_DECREF(py_func);
Py_DECREF(py_module);
return -13;
}
Py_DECREF(py_result);
// Py_DECREF(py_value);
Py_DECREF(py_args);
Py_DECREF(py_func);
Py_DECREF(py_module);
return 0;
}
/**
* Shutdown libsigrokdecode.
*
* @return 0 upon success, non-zero otherwise.
*/
int sigrokdecode_shutdown(void)
{
/* Py_Finalize() returns void, any finalization errors are ignored. */
Py_Finalize();
return 0;
}
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