Function srd_inst_new

libsigrokdecode4DSL/instance.c:339–462

 * @since 0.3.0
 */
SRD_API struct srd_decoder_inst *srd_inst_new(struct srd_session *sess,
		const char *decoder_id, GHashTable *options)
{
	int i;
	struct srd_decoder *dec;
	struct srd_decoder_inst *di;
	char *inst_id;
	PyGILState_STATE gstate;

	i = 1;

	if (!sess)
		return NULL;

	if (!(dec = srd_decoder_get_by_id(decoder_id))) {
		srd_err("Protocol decoder %s not found.", decoder_id);
		return NULL;
	}

	di = malloc(sizeof(struct srd_decoder_inst));
	if (di == NULL){
		srd_err("%s,ERROR:failed to alloc memory.", __func__);
		return NULL;
	}
	memset(di, 0, sizeof(struct srd_decoder_inst));
	
	di->decoder = dec;
	di->sess = sess;

	if (options) {
		inst_id = g_hash_table_lookup(options, "id");
		if (inst_id)
			di->inst_id = g_strdup(inst_id);
		g_hash_table_remove(options, "id");
	}

	/* Create a unique instance ID (as none was provided). */
	if (!di->inst_id) {
		di->inst_id = g_strdup_printf("%s-%d", decoder_id, i++);
		while (srd_inst_find_by_id(sess, di->inst_id)) {
			g_free(di->inst_id);
			di->inst_id = g_strdup_printf("%s-%d", decoder_id, i++);
		}
	}

	gstate = PyGILState_Ensure();

	/*
	 * Prepare a default channel map, where samples come in the
	 * order in which the decoder class defined them.
	 */
    di->py_pinvalues = NULL;
	di->dec_num_channels = g_slist_length(di->decoder->channels) +
			g_slist_length(di->decoder->opt_channels);
			
	if (di->dec_num_channels > 0) {
		di->dec_channelmap = malloc(sizeof(int) * di->dec_num_channels);