Change INI file parser library.

Much simpler but also a bit limitated. Could be change easily in futur if needed

Change-Id: I06f03f093c9206007e3d0c1e86a35d60111be5f8
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>

2 files changed, 154 insertions, 0 deletions

diff --git a/CAN-binder/libs/ini-config/ini-config.cpp b/CAN-binder/libs/ini-config/ini-config.cpp
new file mode 100644
index 0000000..b670e76
--- /dev/null
+++ b/CAN-binder/libs/ini-config/ini-config.cpp
@@ -0,0 +1,93 @@
+/*
+ * 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;
+			}
+		}
+	}
+}
+
+std::map<std::string, std::string> ini_config::get_keys(const std::string& section)
+{
+	std::map<std::string, std::string> ret;
+	
+	std::string prefix = section + '/';
+	for(auto i = config_.begin();
+		i != config_.end();
+		++i)
+	{
+		if (starts_with(i->first, prefix))
+		{
+			ret[i->first] = 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;
+}
\ No newline at end of file
diff --git a/CAN-binder/libs/ini-config/ini-config.hpp b/CAN-binder/libs/ini-config/ini-config.hpp
new file mode 100644
index 0000000..3a15454
--- /dev/null
+++ b/CAN-binder/libs/ini-config/ini-config.hpp
@@ -0,0 +1,61 @@
+/*
+ * 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.
+ */
+
+#ifndef INI_CONFIG_HPP
+#define INI_CONFIG_HPP
+
+#include <string>
+#include <fstream>
+#include <map>
+#include <regex>
+#include <algorithm>
+
+// Représente un fichier de configuration.
+class ini_config
+{
+public:
+	using map = std::map<std::string, std::string>;
+
+	void read_file(const std::string& filename);
+
+	map get_keys(const std::string& section);
+	std::string get_value(const std::string& section, const std::string& key);
+
+	typename map::size_type size() const { return config_.size(); }
+	typename map::iterator begin() { return config_.begin(); }
+	typename map::iterator end() { return config_.end(); }
+	typename map::const_iterator cbegin() const { return config_.cbegin(); }
+	typename map::const_iterator cend() const { return config_.cend(); }
+	typename map::reverse_iterator rbegin() { return config_.rbegin(); }
+	typename map::reverse_iterator rend() { return config_.rend(); }
+	typename map::const_reverse_iterator crbegin() const { return config_.crbegin(); }
+	typename map::const_reverse_iterator crend() const { return config_.crend(); }
+
+private:
+	map config_;
+
+	enum class line_type
+	{
+		ignore = 0,
+		section = 1,
+		key = 2
+	};
+
+	line_type qualify(std::string& line);
+};
+
+#endif // INI_CONFIG_HPP