restructure build to separate the 3 main components into 3 subdirectories

libi2pd for core libs

libi2pd_client for i2pd client libs

daemon for i2pd daemon libs

libi2pd/Config.h

@@ -0,0 +1,113 @@
+#ifndef CONFIG_H
+#define CONFIG_H
+
+#include <string>
+#include <boost/program_options/options_description.hpp>
+#include <boost/program_options/variables_map.hpp>
+
+/**
+ * Functions to parse and store i2pd parameters
+ *
+ * General usage flow:
+ *   Init() -- early as possible
+ *   ParseCmdline() -- somewhere close to main()
+ *   ParseConfig()  -- after detecting path to config
+ *   Finalize()     -- right after all Parse*() functions called
+ *   GetOption()    -- may be called after Finalize()
+ */
+
+namespace i2p {
+namespace config {
+  extern boost::program_options::variables_map m_Options;
+
+  /**
+   * @brief  Initialize list of acceptable parameters
+   *
+   * Should be called before any Parse* functions.
+   */
+  void Init();
+
+  /**
+   * @brief  Parse cmdline parameters, and show help if requested
+   * @param  argc  Cmdline arguments count, should be passed from main().
+   * @param  argv  Cmdline parameters array, should be passed from main()
+   *
+   * If --help is given in parameters, shows it's list with description
+   * terminates the program with exitcode 0.
+   *
+   * In case of parameter misuse boost throws an exception.
+   * We internally handle type boost::program_options::unknown_option,
+   * and then terminate program with exitcode 1.
+   *
+   * Other exceptions will be passed to higher level.
+   */
+  void ParseCmdline(int argc, char* argv[], bool ignoreUnknown = false);
+
+  /**
+   * @brief  Load and parse given config file
+   * @param  path  Path to config file
+   *
+   * If error occured when opening file path is points to,
+   * we show the error message and terminate program.
+   *
+   * In case of parameter misuse boost throws an exception.
+   * We internally handle type boost::program_options::unknown_option,
+   * and then terminate program with exitcode 1.
+   *
+   * Other exceptions will be passed to higher level.
+   */
+  void ParseConfig(const std::string& path);
+
+  /**
+   * @brief  Used to combine options from cmdline, config and default values
+   */
+  void Finalize();
+
+  /* @brief  Accessor to parameters by name
+   * @param  name  Name of the requested parameter
+   * @param  value Variable where to store option
+   * @return this function returns false if parameter not found
+   *
+   * Example: uint16_t port; GetOption("sam.port", port);
+   */
+  template<typename T>
+  bool GetOption(const char *name, T& value) {
+    if (!m_Options.count(name))
+      return false;
+    value = m_Options[name].as<T>();
+    return true;
+  }
+
+  template<typename T>
+  bool GetOption(const std::string& name, T& value) 
+  {
+    return GetOption (name.c_str (), value);
+  }	
+
+  /**
+   * @brief  Set value of given parameter
+   * @param  name  Name of settable parameter
+   * @param  value New parameter value
+   * @return true if value set up successful, false otherwise
+   *
+   * Example: uint16_t port = 2827; SetOption("bob.port", port);
+   */
+  template<typename T>
+  bool SetOption(const char *name, const T& value) {
+    if (!m_Options.count(name))
+      return false;
+    m_Options.at(name).value() = value;
+    notify(m_Options);
+    return true;
+  }
+
+  /**
+   * @brief  Check is value explicitly given or default
+   * @param  name  Name of checked parameter
+   * @return true if value set to default, false othervise
+   */
+  bool IsDefault(const char *name);
+}
+}
+
+#endif // CONFIG_H