Dogcows Code - chaz/yoink/blob - src/Moof/Settings.hh

   1
   2 /*******************************************************************************
   3
   4  Copyright (c) 2009, Charles McGarvey
   5  All rights reserved.
   6
   7  Redistribution   and   use  in  source  and  binary  forms,  with  or  without
   8  modification, are permitted provided that the following conditions are met:
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  10    * Redistributions  of  source  code  must retain the above copyright notice,
  11      this list of conditions and the following disclaimer.
  12    * Redistributions  in binary form must reproduce the above copyright notice,
  13      this  list of conditions and the following disclaimer in the documentation
  14      and/or other materials provided with the distribution.
  15
  16  THIS  SOFTWARE  IS  PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17  AND  ANY  EXPRESS  OR  IMPLIED  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  19  DISCLAIMED.  IN  NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  20  FOR  ANY  DIRECT,  INDIRECT,  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  DAMAGES  (INCLUDING,  BUT  NOT  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  22  SERVICES;  LOSS  OF  USE,  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  23  CAUSED  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  24  OR  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  25  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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  27 *******************************************************************************/
  28
  29 #ifndef _MOOF_SETTINGS_HH_
  30 #define _MOOF_SETTINGS_HH_
  31
  32 /**
  33  * @file Settings.hh
  34  * Load, store, save program settings.
  35  */
  36
  37 #include <string>
  38 #include <vector>
  39
  40 #include <boost/algorithm/string.hpp>
  41
  42 #include <Moof/Log.hh>
  43 #include <Moof/Script.hh>
  44
  45
  46 namespace Mf {
  47
  48
  49 class Settings
  50 {
  51 public:
  52
  53         Settings()
  54         {
  55                 mScript.importBaseLibrary();
  56                 importLogFunctions(mScript);
  57         }
  58
  59         ~Settings();
  60
  61         // get global instance
  62         static Settings& getInstance();
  63
  64         void parseArgs(int argc, char* argv[]);
  65
  66         void loadFromFile(const std::string& filePath);
  67         void loadFromFiles(const std::vector<std::string>& filePaths);
  68
  69         void clear();           // remove all settings
  70
  71         void saveAs(const std::string& filePath);
  72         void save() const;
  73
  74         template <typename T>
  75         bool get(const std::string& key, T& value) const;
  76
  77 private:
  78
  79         mutable Script  mScript;
  80
  81         std::string             mUserFile;
  82 };
  83
  84
  85 template <typename T>
  86 bool Settings::get(const std::string& key, T& value) const
  87 {
  88         Script::Slot top = mScript[-1];
  89         Script::Slot globals = mScript.getGlobalTable();
  90
  91         std::vector<std::string> fields;
  92         boost::split(fields, key, boost::is_any_of("."));
  93
  94         globals.pushCopy();
  95
  96         std::vector<std::string>::iterator it;
  97         for (it = fields.begin(); it != fields.end(); ++it)
  98         {
  99                 if (top.isTable())
 100                 {
 101                         top.pushField(*it);
 102                 }
 103                 else
 104                 {
 105                         mScript.clear();
 106                         return false;
 107                 }
 108         }
 109
 110         bool got = top.get(value);
 111         mScript.clear();
 112         return got;
 113 }
 114
 115
 116 } // namepsace Mf
 117
 118 #endif // _MOOF_SETTINGS_HH_
 119
 120 /** vim: set ts=4 sw=4 tw=80: *************************************************/
 121