Separation Generator to a dedicated repo

[apps/agl-service-can-low-level.git] / libs / ini-config / ini-config.cpp

diff --git a/libs/ini-config/ini-config.cpp b/libs/ini-config/ini-config.cpp
new file mode 100644 (file)
index 0000000..ef3ab25
--- /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;
+}
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