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

   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:
   9
  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.
  26
  27 *******************************************************************************/
  28
  29 #include <sstream>
  30 #include <cstdlib>              // getenv
  31 #include <cstring>              // strchr
  32
  33 #include <boost/algorithm/string.hpp>
  34
  35 #include "Settings.hh"
  36
  37
  38 namespace Mf {
  39
  40
  41 Settings::Settings(int argc, char* argv[])
  42 {
  43         parseArgs(argc, argv);
  44 }
  45
  46
  47 Settings& Settings::getInstance()
  48 {
  49         static Settings settings;
  50         return settings;
  51 }
  52
  53
  54 void Settings::parseArgs(int argc, char* argv[])
  55 {
  56         for (int i = 1; i < argc; ++i)
  57         {
  58                 char* where = strchr(argv[i], (int)'=');
  59
  60                 if (where)
  61                 {
  62                         std::string key(argv[i], (size_t)(where - argv[i]));
  63                         std::string stringValue(where + 1);
  64
  65                         std::stringstream stream;
  66                         stream << stringValue << std::endl;
  67
  68                         Deserializer deserializer(stream);
  69
  70                         try
  71                         {
  72                                 SerializablePtr value(deserializer.deserialize());
  73                                 map_[key] = value;
  74                         }
  75                         catch (std::exception e)
  76                         {
  77                                 // it doesn't deserialize to anything we know, so just store it
  78                                 // as a string
  79                                 map_[key] = SerializablePtr(new SerializableString(stringValue));
  80                         }
  81                 }
  82         }
  83 }
  84
  85
  86 void Settings::loadFromFile(const std::string& filePath, bool precedence)
  87 {
  88         std::vector<std::string> paths;
  89         boost::split(paths, filePath, boost::is_any_of(":"));
  90
  91         loadFromFiles(paths, precedence);
  92 }
  93
  94 void Settings::loadFromFiles(const std::vector<std::string>& filePaths,
  95                 bool precedence)
  96 {
  97         std::vector<std::string>::const_iterator it;
  98
  99         char* home = getenv("HOME");
 100
 101         for (it = filePaths.begin(); it != filePaths.end(); ++it)
 102         {
 103                 std::string path = *it;
 104
 105                 if (home)
 106                 {
 107                         boost::replace_first(path, "$HOME", home);
 108                 }
 109
 110                 try
 111                 {
 112                         Deserializer deserializer(*it, true);
 113
 114                         SerializablePtr obj = deserializer.deserialize();
 115                         std::map<std::string,SerializablePtr> map;
 116
 117                         if (obj && obj->get(map))
 118                         {
 119                                 if (!precedence)
 120                                 {
 121                                         map_.insert(map.begin(), map.end());
 122                                 }
 123                                 else
 124                                 {
 125                                         map.insert(map_.begin(), map_.end());
 126                                         map_ = map;
 127                                 }
 128                         }
 129                 }
 130                 catch (Deserializer::Exception e)
 131                 {
 132                         std::cerr << "Cannot load settings from " << *it <<
 133                                 " because an exception was thrown: " << e.what() << std::endl;
 134                 }
 135         }
 136 }
 137
 138
 139 } // namepsace Mf
 140
 141 /** vim: set ts=4 sw=4 tw=80: *************************************************/
 142