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

   1
   2 /*]  Copyright (c) 2009-2010, Charles McGarvey  [**************************
   3 **]  All rights reserved.
   4 *
   5 * vi:ts=4 sw=4 tw=75
   6 *
   7 * Distributable under the terms and conditions of the 2-clause BSD license;
   8 * see the file COPYING for a complete text of the license.
   9 *
  10 **************************************************************************/
  11
  12 #ifndef _MOOF_SETTINGS_HH_
  13 #define _MOOF_SETTINGS_HH_
  14
  15 /**
  16  * \file settings.hh
  17  * Load, store, save program settings.
  18  */
  19
  20 #include <string>
  21 #include <vector>
  22
  23 #include <boost/algorithm/string.hpp>
  24
  25 #include <moof/script.hh>
  26
  27
  28 namespace moof {
  29
  30
  31 class settings
  32 {
  33 public:
  34
  35         settings(int argc, char* argv[], const std::string& path);
  36
  37         ~settings();
  38
  39         void parse_args(int argc, char* argv[]);
  40
  41         void load_files(const std::string& path);
  42         void load_files(const std::vector<std::string>& path);
  43
  44
  45         /**
  46          * Remove all settings.
  47          */
  48         void clear();
  49
  50         void save_as(const std::string& path);
  51         void save() const;
  52
  53
  54         /**
  55          * Get a setting by name.
  56          * \param key The name of the setting.
  57          * \param value A reference to the variable to store the setting.
  58          * \return True if the setting exists, false otherwise.
  59          */
  60         template <class T>
  61         bool get(const std::string& key, T& value) const;
  62
  63
  64 private:
  65
  66         mutable script  script_;
  67
  68         std::string             mUserFile;
  69 };
  70
  71
  72 template <class T>
  73 bool settings::get(const std::string& key, T& value) const
  74 {
  75         script::slot top = script_[-1];
  76         script::slot globals = script_.globals();
  77
  78         std::vector<std::string> fields;
  79         boost::split(fields, key, boost::is_any_of("."));
  80
  81         globals.push_copy();
  82
  83         std::vector<std::string>::iterator it;
  84         for (it = fields.begin(); it != fields.end(); ++it)
  85         {
  86                 if (top.is_table())
  87                 {
  88                         top.push_field(*it);
  89                 }
  90                 else
  91                 {
  92                         script_.clear_stack();
  93                         return false;
  94                 }
  95         }
  96
  97         bool got = top.get(value);
  98         script_.clear_stack();
  99         return got;
 100 }
 101
 102
 103 } // namepsace moof
 104
 105 #endif // _MOOF_SETTINGS_HH_
 106