From 2c5db5ee644277fc8816f44c02be0280e73834af Mon Sep 17 00:00:00 2001
From: Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
Date: Thu, 5 Jun 2014 09:34:32 +0000
Subject: [PATCH] added some experiments with libconfig

git-svn-id: https://zerberus.eonerc.rwth-aachen.de:8443/svn/s2ss/trunk@6 8ec27952-4edc-4aab-86aa-e87bb2611832
---
 etc/s2ss.conf | 26 ++++++++++++++++++++
 include/cfg.h | 21 ++++++++++++++++
 src/cfg.c     | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 113 insertions(+)
 create mode 100644 etc/s2ss.conf
 create mode 100644 include/cfg.h
 create mode 100644 src/cfg.c

diff --git a/etc/s2ss.conf b/etc/s2ss.conf
new file mode 100644
index 000000000..fec088d5a
--- /dev/null
+++ b/etc/s2ss.conf
@@ -0,0 +1,26 @@
+# Example configuration file for the s2ss server
+
+# The name of this node
+name = "acs";
+
+# The debugging level (0 - 10)
+debug = 10;
+
+nodes = (
+	{
+		id = 123;
+		name = "acs";
+		type = "opal";
+		addr = "137.123.234.233";
+		port = 7582;
+	}
+);
+
+paths = (
+	{
+		from = "acs";
+		to = "trond";
+		reverse = true;	# also setup a reverse path
+		log = true;	# log messages
+	}
+);
diff --git a/include/cfg.h b/include/cfg.h
new file mode 100644
index 000000000..8ea44fcd1
--- /dev/null
+++ b/include/cfg.h
@@ -0,0 +1,21 @@
+/**
+ * Configuration parser
+ *
+ * @author Steffen Vogel <steffen.vogel@rwth-aachen.de>
+ * @copyright 2014, Institute for Automation of Complex Power Systems, EONERC
+ */
+
+#ifndef _CONFIG_H_
+#define _CONFIG_H_
+
+#include <libconfig.h>
+
+#include "path.h"
+#include "node.h"
+
+int config_parse(config_t *c, const char *filename, struct path *paths, struct node *nodes);
+
+int config_parse_path(config_setting_t *c, struct path *p);
+int config_parse_node(config_setting_t *c, struct node *n);
+
+#endif /* _CONFIG_H_ */
diff --git a/src/cfg.c b/src/cfg.c
new file mode 100644
index 000000000..9bb05bb2d
--- /dev/null
+++ b/src/cfg.c
@@ -0,0 +1,66 @@
+/**
+ * Configuration parser
+ *
+ * @author Steffen Vogel <steffen.vogel@rwth-aachen.de>
+ * @copyright 2014, Institute for Automation of Complex Power Systems, EONERC
+ */
+
+#include <stdlib.h>
+
+#include "config.h"
+#include "utils.h"
+
+int config_parse(config_t *cfg, const char *filename, struct path *paths, struct node *nodes)
+{
+	if (!config_read_file(cfg, filename)) {
+		logger(ERROR, "Failed to parse configuration: %s in %s:%d",
+			config_error_text(cfg), config_error_file(cfg), config_error_line(cfg));
+		exit(EXIT_FAILURE);
+	}
+
+	config_setting_t *cfg_root = config_root_setting(cfg);
+
+	// read global settings
+	int debug;
+	if (config_setting_lookup_int(cfg_root, "debug", &debug))
+		logger(DEBUG, "Setting debug level to %u", debug);
+
+	// read nodes
+	config_setting_t *cfg_nodes = config_setting_get_member(cfg_root, "nodes");
+	if (cfg_nodes) {
+		for (int i=0; i < config_setting_length(cfg_nodes); i++) {
+			config_setting_t *cfg_node = config_setting_get_elem(cfg_nodes, i);
+			config_parse_node(cfg_node, nodes);
+		}
+	}
+
+	// read paths
+	config_setting_t *cfg_paths = config_setting_get_member(cfg_root, "paths");
+	if (cfg_paths) {
+		for (int i=0; i < config_setting_length(cfg_paths); i++) {
+			for (int i=0; i < config_setting_length(cfg_paths); i++) {
+				config_setting_t *cfg_path = config_setting_get_elem(cfg_paths, i);
+				config_parse_path(cfg_path, &paths[i]);
+			}
+		}
+	}
+
+	return CONFIG_TRUE;
+}
+
+int config_parse_path(config_setting_t *c, struct path *p)
+{
+
+	return CONFIG_TRUE;
+}
+
+int config_parse_node(config_setting_t *c, struct node *n)
+{
+	config_setting_lookup_string(c, "name", (const char **) &n->name);
+
+
+	logger(DEBUG, "Found node: %s", n->name);
+
+	return CONFIG_TRUE;
+}
+