+ if (!(dir = opendir(DECODERS_DIR)))
+ return SIGROKDECODE_ERR_DECODERS_DIR;
+
+ while ((dp = readdir(dir)) != NULL) {
+ 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. */
+ dec = malloc(sizeof(struct sigrokdecode_decoder));
+
+ /* Load the decoder. */
+ ret = sigrokdecode_load_decoder(decodername, &dec);
+
+ /* Append it to the list of supported/loaded decoders. */
+ list_pds = g_slist_append(list_pds, dec);
+ }
+ closedir(dir);
+
+ return SIGROKDECODE_OK;
+}
+
+/**
+ * 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 *sigrokdecode_list_decoders(void)
+{
+ return list_pds;
+}
+
+/**
+ * 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 sigrokdecode_decoder *sigrokdecode_get_decoder_by_id(const char *id)
+{
+ GSList *l;
+ struct sigrokdecode_decoder *dec;
+
+ for (l = sigrokdecode_list_decoders(); l; l = l->next) {
+ dec = l->data;
+ if (!strcmp(dec->id, id))
+ return dec;
+ }
+
+ return NULL;
+}
+
+/**
+ * Helper function to handle Python strings.
+ *
+ * TODO: @param entries.
+ *
+ * @return SIGROKDECODE_OK upon success, a (negative) error code otherwise.
+ * The 'outstr' argument points to a malloc()ed string upon success.
+ */
+static int h_str(PyObject *py_res, PyObject *py_func, PyObject *py_mod,
+ const char *key, char **outstr)
+{
+ PyObject *py_str;
+ char *str;
+ int ret;
+
+ py_str = PyMapping_GetItemString(py_res, (char *)key);
+ if (!py_str || !PyString_Check(py_str)) {
+ ret = SIGROKDECODE_ERR_PYTHON; /* TODO: More specific error? */
+ goto err_h_decref_func;
+ }
+
+ /*
+ * PyString_AsString()'s returned string refers to an internal buffer
+ * (not a copy), i.e. the data must not be modified, and the memory
+ * must not be free()'d.
+ */
+ if (!(str = PyString_AsString(py_str))) {
+ ret = SIGROKDECODE_ERR_PYTHON; /* TODO: More specific error? */
+ goto err_h_decref_str;
+ }
+
+ if (!(*outstr = strdup(str))) {
+ ret = SIGROKDECODE_ERR_MALLOC;
+ goto err_h_decref_str;
+ }
+
+ Py_XDECREF(py_str);
+
+ return SIGROKDECODE_OK;
+
+err_h_decref_str:
+ Py_XDECREF(py_str);
+err_h_decref_func:
+ Py_XDECREF(py_func);
+ Py_XDECREF(py_mod);
+
+ if (PyErr_Occurred())
+ PyErr_Print(); /* Returns void. */
+
+ return ret;