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/Log.hh>
  26 #include <Moof/Script.hh>
  27
  28
  29 namespace Mf {
  30
  31
  32 class Settings
  33 {
  34 public:
  35
  36         Settings(int argc, char* argv[], const std::string& path)
  37         {
  38                 mScript.importBaseLibrary();
  39                 importLogFunctions(mScript);
  40
  41                 parseArgs(argc, argv);
  42                 loadFromFiles(path);
  43         }
  44
  45         ~Settings();
  46
  47         void parseArgs(int argc, char* argv[]);
  48
  49         void loadFromFiles(const std::string& path);
  50         void loadFromFiles(const std::vector<std::string>& path);
  51
  52         void clear();           // remove all settings
  53
  54         void saveAs(const std::string& path);
  55         void save() const;
  56
  57         template <class T>
  58         bool get(const std::string& key, T& value) const;
  59
  60 private:
  61
  62         mutable Script  mScript;
  63
  64         std::string             mUserFile;
  65 };
  66
  67
  68 template <class T>
  69 bool Settings::get(const std::string& key, T& value) const
  70 {
  71         Script::Slot top = mScript[-1];
  72         Script::Slot globals = mScript.globals();
  73
  74         std::vector<std::string> fields;
  75         boost::split(fields, key, boost::is_any_of("."));
  76
  77         globals.pushCopy();
  78
  79         std::vector<std::string>::iterator it;
  80         for (it = fields.begin(); it != fields.end(); ++it)
  81         {
  82                 if (top.isTable())
  83                 {
  84                         top.pushField(*it);
  85                 }
  86                 else
  87                 {
  88                         mScript.clearStack();
  89                         return false;
  90                 }
  91         }
  92
  93         bool got = top.get(value);
  94         mScript.clearStack();
  95         return got;
  96 }
  97
  98
  99 } // namepsace Mf
 100
 101 #endif // _MOOF_SETTINGS_HH_
 102