lua2c completely operationnal

- Retrieve args from lua call correctly
- Correctly push and set function pointer into plugin
symbols

Change-Id: I12d03e1101c458a042887a67a35a08082bd98f4c
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>

1 files changed, 75 insertions, 0 deletions

diff --git a/plugins/lua2c-interface.cpp b/plugins/lua2c-interface.cpp
new file mode 100644
index 0000000..76f61cc
--- /dev/null
+++ b/plugins/lua2c-interface.cpp
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2016 "IoT.bzh"
+ * Author Romain Forlot <romain.forlot@iot.bzh>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+*/
+
+#define AFB_BINDING_VERSION 2
+#include <afb/afb-binding.h>
+#include <systemd/sd-event.h>
+#include <json-c/json_object.h>
+#include <stdbool.h>
+#include <string.h>
+
+#include "signal-composer.hpp"
+#include "ctl-config.h"
+#include "wrap-json.h"
+
+extern "C"
+{
+
+CTLP_LUALOAD
+CTLP_REGISTER("lua2c-interface");
+
+typedef struct CtxS {
+	struct signalCBT* pluginHandle;
+} CtxT;
+
+static CtxT *pluginCtx = NULL;
+
+// Call at initialisation time
+CTLP_ONLOAD(plugin, handle) {
+	pluginCtx = (CtxT*)calloc (1, sizeof(CtxT));
+	pluginCtx->pluginHandle = (struct signalCBT*)handle;
+
+	AFB_NOTICE ("Low-can plugin: label='%s' version='%s' info='%s'",
+		plugin->label,
+		plugin->version,
+		plugin->info);
+
+	return (void*)pluginCtx;
+}
+
+CTLP_LUA2C (setSignalValueWrap, label, argsJ)
+{
+	const char* name = nullptr;
+	double resultNum;
+	uint64_t timestamp;
+	if(! wrap_json_unpack(argsJ, "{ss, sF, sF? !}",
+		"name", &name,
+		"value", &resultNum,
+		"timestamp", &timestamp))
+	{
+		AFB_ERROR("Fail to set value for label: %s, argsJ: %s", label, json_object_to_json_string(argsJ));
+		return -1;
+	}
+
+	struct signalValue result = {0,0,1, resultNum, 0, ""};
+	pluginCtx->pluginHandle->setSignalValue(name, timestamp, result);
+	return 0;
+}
+
+// extern "C" closure
+}