Dogcows Code - chaz/yoink/blob - src/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 dc {
  39
  40
  41 settings::settings(int argc, char* argv[])
  42 {
  43         parseArgs(argc, argv);
  44 }
  45
  46
  47 void settings::parseArgs(int argc, char* argv[])
  48 {
  49         for (int i = 1; i < argc; i++)
  50         {
  51                 char* where = strchr(argv[i], (int)'=');
  52
  53                 if (where)
  54                 {
  55                         std::string key(argv[i], (size_t)(where - argv[i]));
  56                         std::string stringValue(where + 1);
  57
  58                         std::stringstream stream;
  59                         stream << stringValue << std::endl;
  60
  61                         deserializer in(stream);
  62
  63                         try
  64                         {
  65                                 serializable_ptr value(in.deserialize());
  66                                 map[key] = value;
  67                         }
  68                         catch (std::exception e)
  69                         {
  70                                 // it doesn't deserialize to anything we know, so just store it
  71                                 // as a string
  72                                 map[key] = serializable_ptr(new wrapped_string(stringValue));
  73                         }
  74                 }
  75         }
  76 }
  77
  78
  79 void settings::loadFromFile(const std::string& filePath, bool precedence)
  80 {
  81         std::vector<std::string> paths;
  82         boost::split(paths, filePath, boost::is_any_of(":"));
  83
  84         loadFromFiles(paths, precedence);
  85 }
  86
  87 void settings::loadFromFiles(const std::vector<std::string>& filePaths,
  88                 bool precedence)
  89 {
  90         std::vector<std::string>::const_iterator it;
  91
  92         char* home = getenv("HOME");
  93
  94         for (it = filePaths.begin(); it != filePaths.end(); it++)
  95         {
  96                 std::string path = *it;
  97
  98                 if (home)
  99                 {
 100                         boost::replace_first(path, "$HOME", home);
 101                 }
 102
 103                 deserializer in(*it, true);
 104
 105                 std::cout << "Looking for a config file at " << path << std::endl;
 106                 try
 107                 {
 108                         serializable_ptr obj = in.deserialize();
 109                         std::map<std::string,serializable_ptr> dict;
 110                         if (obj && obj->get(dict))
 111                         {
 112                                 if (!precedence)
 113                                 {
 114                                         map.insert(dict.begin(), dict.end());
 115                                 }
 116                                 else
 117                                 {
 118                                         dict.insert(map.begin(), map.end());
 119                                         map = dict;
 120                                 }
 121                         }
 122                 }
 123                 catch (deserializer::exception e)
 124                 {
 125                         std::cerr << "Cannot load settings from " << *it <<
 126                                 " because an exception was thrown: " << e.what() << std::endl;
 127                 }
 128         }
 129 }
 130
 131
 132 } // namepsace dc
 133
 134 /** vim: set ts=4 sw=4 tw=80: *************************************************/
 135