Restore /etc/dev-mapping.conf supportjellyfish_10.0.3jellyfish_10.0.2jellyfish/10.0.3jellyfish/10.0.210.0.310.0.2jellyfish

Add back the ini-config and config-parser code that existed
previously, and use it in binding init to over-ride the device
mapping from the controller JSON if /etc/dev-mapping.conf exists.
This restores the documented behavior, and is needed for the
existing AGL demo platform support and soon CI.

Additionally:
- Add code to validate the active_message_set, diagnostic_bus, and
  bus device mapping configuration values.
- The above required moving plugin loading before the configuration
  callback in the controller configuration, but this change seems
  rational in that everything required by the generated plugin code
  is already initialized before then, and it makes validating the
  configuration possible without adding an extra callback.
- Add logging of the used CAN bus to device mappings at info level
  to ease debugging any future issues.
- Tweak the log level of the missing configuration file message to
  info from error, since it is a legitimate mode of operation if
  relying on the default bus values in the controller JSON.

Bug-AGL: SPEC-3755

Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Change-Id: I440f5e0fc85be41f7c4c1f47d824a403525a18f9
(cherry picked from commit 9e23caa4c56259044604c38f107f7c637001b846)

1 files changed, 100 insertions, 0 deletions

diff --git a/libs/ini-config/ini-config.cpp b/libs/ini-config/ini-config.cpp
new file mode 100644
index 00000000..e429b959
--- /dev/null
+++ b/libs/ini-config/ini-config.cpp
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2015, 2016 ,2017 "IoT.bzh"
+ * Author "Loïc Collignon" <loic.collignon@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.
+ */
+
+#include "ini-config.hpp"
+
+bool starts_with(const std::string& text, const std::string& token)
+{
+	if(text.length() < token.length()) return false;
+	return (text.compare(0, token.length(), token) == 0);
+}
+
+void ini_config::read_file(const std::string& filename)
+{
+	std::ifstream f(filename);
+	if (f)
+	{
+		std::regex r_section("^\\s*\\[([^\\]]+)\\]\\s*(#.*)?$");
+		std::regex r_key("^\\s*([^\\s]+)\\s*=\\s*\"([^\"]+)\"\\s*(#.*)?$");
+		std::string current_section;
+		std::string line;
+		while (std::getline(f, line))
+		{
+			std::smatch mr;
+
+			switch (qualify(line))
+			{
+			case line_type::section:
+				if (std::regex_match(line, mr, r_section) && mr.size() >= 2 && mr[1].matched)
+				{
+					current_section = mr[1].str();
+				}
+				break;
+			case line_type::key:
+				if(std::regex_match(line, mr, r_key) && mr.size() >= 2 && mr[1].matched)
+				{
+					std::string key = current_section + '/' + mr[1].str();
+					config_[key] = (mr.size() >= 3 && mr[2].matched) ? mr[2].str() : "";
+				}
+				break;
+			case line_type::ignore:
+				break;
+			}
+		}
+	}
+}
+
+ini_config::map ini_config::get_keys(const std::string& section, bool wo_prefix)
+{
+	map ret;
+	std::string key;
+
+	std::string prefix = section + '/';
+	for(auto i = config_.begin();
+		i != config_.end();
+		++i)
+	{
+		if (starts_with(i->first, prefix))
+		{
+			if(wo_prefix)
+				key = i->first.substr(section.size()+1);
+			else
+				key = i->first;
+			ret[key] = i->second;
+		}
+	}
+	return ret;
+}
+
+std::string ini_config::get_value(const std::string& section, const std::string& key)
+{
+	return config_[section + '/' + key];
+}
+
+ini_config::line_type ini_config::qualify(std::string& line)
+{
+	if (line.size())
+	{
+		for (std::string::value_type c : line)
+		{
+			if (c == '#') return line_type::ignore;
+			if (c == '[') return line_type::section;
+			if (!std::isspace(c, std::locale("C"))) return line_type::key;
+		}
+	}
+	return line_type::ignore;
+}