hooks: added new dump hook

lib/hooks/CMakeLists.txt

@@ -35,6 +35,7 @@ set(HOOK_SRC
     fix.c
     cast.c
     average.c
+    dump.c
 )
 
 if(WITH_IO)

lib/hooks/dump.c

@@ -0,0 +1,54 @@
+
+/** Dump hook.
+ *
+ * @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
+ * @copyright 2014-2019, Institute for Automation of Complex Power Systems, EONERC
+ * @license GNU General Public License (version 3)
+ *
+ * VILLASnode
+ *
+ * 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
+ * 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/>.
+ *********************************************************************************/
+
+/** @addtogroup hooks Hook functions
+ * @{
+ */
+
+#include <villas/hook.h>
+#include <villas/plugin.h>
+#include <villas/node.h>
+#include <villas/sample.h>
+
+static int dump_process(struct hook *h, struct sample *smps[], unsigned *cnt)
+{
+	for (int i = 0; i < *cnt; i++)
+		sample_dump(smps[i]);
+
+	return 0;
+}
+
+static struct plugin p = {
+	.name		= "dump",
+	.description	= "dump data to stdout",
+	.type		= PLUGIN_TYPE_HOOK,
+	.hook		= {
+		.flags		= HOOK_NODE_READ | HOOK_NODE_WRITE | HOOK_PATH,
+		.priority	= 1,
+		.process	= dump_process
+	}
+};
+
+REGISTER_PLUGIN(&p)
+
+/** @} */