transform: Add a "nop" transform module.

[libsigrok.git] / src / transform / nop.c

diff --git a/src/transform/nop.c b/src/transform/nop.c
new file mode 100644 (file)
index 0000000..8de2f2d
--- /dev/null
+++ b/src/transform/nop.c
@@ -0,0 +1,49 @@
+/*
+ * This file is part of the libsigrok project.
+ *
+ * Copyright (C) 2015 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 <string.h>
+#include "libsigrok.h"
+#include "libsigrok-internal.h"
+
+#define LOG_PREFIX "transform/nop"
+
+static int receive(const struct sr_transform *t,
+               struct sr_datafeed_packet *packet_in,
+               struct sr_datafeed_packet **packet_out)
+{
+       if (!t || !t->sdi || !packet_in || !packet_out)
+               return SR_ERR_ARG;
+
+       /* Do nothing, just pass on packets unmodified. */
+       sr_spew("Received packet of type %d, passing on unmodified.", packet_in->type);
+       *packet_out = packet_in;
+
+       return SR_OK;
+}
+
+SR_PRIV struct sr_transform_module transform_nop = {
+       .id = "nop",
+       .name = "NOP",
+       .desc = "Do nothing",
+       .options = NULL,
+       .init = NULL,
+       .receive = receive,
+       .cleanup = NULL,
+};