Dogcows Code - chaz/yoink/blob - src/moof/settings.hh

   1
   2 /*]  Copyright (c) 2009-2011, Charles McGarvey  [*****************************
   3 **]  All rights reserved.
   4 *
   5 * Distributable under the terms and conditions of the 2-clause BSD license;
   6 * see the file COPYING for a complete text of the license.
   7 *
   8 *****************************************************************************/
   9
  10 #ifndef _MOOF_SETTINGS_HH_
  11 #define _MOOF_SETTINGS_HH_
  12
  13 /**
  14  * \file settings.hh
  15  * Load, store, save program settings.
  16  */
  17
  18 #include <string>
  19 #include <vector>
  20
  21 #include <boost/algorithm/string.hpp>
  22
  23 #include <moof/script.hh>
  24
  25
  26 namespace moof {
  27
  28
  29 class settings
  30 {
  31 public:
  32
  33         settings(int argc, char* argv[], const std::string& path);
  34         ~settings();
  35
  36         void parse_args(int argc, char* argv[]);
  37
  38         void load_files(const std::string& path);
  39         void load_files(const std::vector<std::string>& path);
  40
  41         /**
  42          * Remove all settings.
  43          */
  44         void clear();
  45
  46         void save_as(const std::string& path);
  47         void save() const;
  48
  49         /**
  50          * Get a setting by name.
  51          * \param key The name of the setting.
  52          * \param value A reference to the variable to store the setting.
  53          * \return True if the setting exists, false otherwise.
  54          */
  55         template <class T>
  56         bool get(const std::string& key, T& value) const;
  57
  58 private:
  59
  60         mutable script  script_;
  61         std::string     userfile_;
  62 };
  63
  64 template <class T>
  65 bool settings::get(const std::string& key, T& value) const
  66 {
  67         script::slot top = script_[-1];
  68         script::slot globals = script_.globals();
  69
  70         std::vector<std::string> fields;
  71         boost::split(fields, key, boost::is_any_of("."));
  72
  73         globals.push_copy();
  74
  75         std::vector<std::string>::iterator it;
  76         for (it = fields.begin(); it != fields.end(); ++it)
  77         {
  78                 if (top.is_table())
  79                 {
  80                         top.push_field(*it);
  81                 }
  82                 else
  83                 {
  84                         script_.clear_stack();
  85                         return false;
  86                 }
  87         }
  88
  89         bool got = top.get(value);
  90         script_.clear_stack();
  91         return got;
  92 }
  93
  94
  95 } // namepsace moof
  96
  97 #endif // _MOOF_SETTINGS_HH_
  98