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/*
* This file is part of the sigrok project.
*
* Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
* Copyright (C) 2011 Bert Vermeulen <bert@biot.com>
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <sigrokdecode.h> /* First, so we avoid a _POSIX_C_SOURCE warning. */
#include <dirent.h>
/* The list of protocol decoders. */
GSList *pd_list = NULL;
GSList *di_list = NULL;
/**
* Returns the list of supported/loaded protocol decoders.
*
* This is a GSList containing the names of the decoders as strings.
*
* @return List of decoders, NULL if none are supported or loaded.
*/
GSList *srd_list_decoders(void)
{
return pd_list;
}
/**
* Get the decoder with the specified ID.
*
* @param id The ID string of the decoder to return.
* @return The decoder with the specified ID, or NULL if not found.
*/
struct srd_decoder *srd_get_decoder_by_id(const char *id)
{
GSList *l;
struct srd_decoder *dec;
for (l = srd_list_decoders(); l; l = l->next) {
dec = l->data;
if (!strcmp(dec->id, id))
return dec;
}
return NULL;
}
/**
* TODO
*
* @param name TODO
*
* @return SRD_OK upon success, a (negative) error code otherwise.
*/
int srd_load_decoder(const char *name, struct srd_decoder **dec)
{
struct srd_decoder *d;
PyObject *py_mod, *py_res;
int r;
fprintf(stdout, "%s: %s\n", __func__, name);
/* "Import" the Python module. */
if (!(py_mod = PyImport_ImportModule(name))) { /* NEWREF */
PyErr_Print(); /* Returns void. */
return SRD_ERR_PYTHON; /* TODO: More specific error? */
}
/* Get the 'Decoder' class as Python object. */
py_res = PyObject_GetAttrString(py_mod, "Decoder"); /* NEWREF */
if (!py_res) {
if (PyErr_Occurred())
PyErr_Print(); /* Returns void. */
Py_XDECREF(py_mod);
fprintf(stderr, "Decoder class not found in PD module %s\n", name);
return SRD_ERR_PYTHON; /* TODO: More specific error? */
}
if (!(d = malloc(sizeof(struct srd_decoder))))
return SRD_ERR_MALLOC;
if ((r = h_str(py_res, "id", &(d->id))) < 0)
return r;
if ((r = h_str(py_res, "name", &(d->name))) < 0)
return r;
if ((r = h_str(py_res, "longname",
&(d->longname))) < 0)
return r;
if ((r = h_str(py_res, "desc", &(d->desc))) < 0)
return r;
if ((r = h_str(py_res, "longdesc",
&(d->longdesc))) < 0)
return r;
if ((r = h_str(py_res, "author", &(d->author))) < 0)
return r;
if ((r = h_str(py_res, "email", &(d->email))) < 0)
return r;
if ((r = h_str(py_res, "license", &(d->license))) < 0)
return r;
d->py_mod = py_mod;
d->py_decobj = py_res;
/* TODO: Handle func, inputformats, outputformats. */
/* Note: They must at least be set to NULL, will segfault otherwise. */
d->func = NULL;
d->inputformats = NULL;
d->outputformats = NULL;
*dec = d;
return SRD_OK;
}
/**
* TODO
*/
int srd_unload_decoder(struct srd_decoder *dec)
{
g_free(dec->id);
g_free(dec->name);
g_free(dec->desc);
g_free(dec->func);
/* TODO: Free everything in inputformats and outputformats. */
if (dec->inputformats != NULL)
g_slist_free(dec->inputformats);
if (dec->outputformats != NULL)
g_slist_free(dec->outputformats);
Py_XDECREF(dec->py_decobj);
Py_XDECREF(dec->py_mod);
/* TODO: (g_)free dec itself? */
return SRD_OK;
}
int srd_load_all_decoders(void)
{
DIR *dir;
struct dirent *dp;
int ret;
char *decodername;
struct srd_decoder *dec;
if (!(dir = opendir(DECODERS_DIR))) {
Py_Finalize(); /* Returns void. */
return SRD_ERR_DECODERS_DIR;
}
while ((dp = readdir(dir)) != NULL) {
/* Ignore filenames which don't end with ".py". */
if (!g_str_has_suffix(dp->d_name, ".py"))
continue;
/* Decoder name == filename (without .py suffix). */
decodername = g_strndup(dp->d_name, strlen(dp->d_name) - 3);
/* TODO: Error handling. Use g_try_malloc(). */
if (!(dec = malloc(sizeof(struct srd_decoder)))) {
Py_Finalize(); /* Returns void. */
return SRD_ERR_MALLOC;
}
/* Load the decoder. */
/* TODO: Warning if loading fails for a decoder. */
if ((ret = srd_load_decoder(decodername, &dec)) == SRD_OK) {
/* Append it to the list of supported/loaded decoders. */
pd_list = g_slist_append(pd_list, dec);
}
}
closedir(dir);
return SRD_OK;
}
/**
* TODO
*/
int srd_unload_all_decoders(void)
{
GSList *l;
struct srd_decoder *dec;
for (l = srd_list_decoders(); l; l = l->next) {
dec = l->data;
/* TODO: Error handling. */
srd_unload_decoder(dec);
}
return SRD_OK;
}
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