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PropertyFileConfiguration.cpp

//
// PropertyFileConfiguration.cpp
//
// $Id: //poco/1.2/Util/src/PropertyFileConfiguration.cpp#2 $
//
// Library: Util
// Package: Configuration
// Module:  PropertyFileConfiguration
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#include "Poco/Util/PropertyFileConfiguration.h"
#include "Poco/Exception.h"
#include "Poco/String.h"
#include "Poco/Path.h"
#include <fstream>
#include <locale>


using Poco::trim;
using Poco::Path;


namespace Poco {
namespace Util {


PropertyFileConfiguration::PropertyFileConfiguration()
{
}


00058 PropertyFileConfiguration::PropertyFileConfiguration(std::istream& istr)
{
      load(istr);
}

      
00064 PropertyFileConfiguration::PropertyFileConfiguration(const std::string& path)
{
      load(path);
}


00070 PropertyFileConfiguration::~PropertyFileConfiguration()
{
}

      
00075 void PropertyFileConfiguration::load(std::istream& istr)
{
      clear();
      while (!istr.eof())
      {
            parseLine(istr);
      }
}

      
00085 void PropertyFileConfiguration::load(const std::string& path)
{
      std::ifstream istr(Path::transcode(path).c_str());
      if (istr.good())
            load(istr);
      else
            throw Poco::OpenFileException(path);
}


00095 void PropertyFileConfiguration::save(std::ostream& ostr) const
{
      MapConfiguration::iterator it = begin();
      MapConfiguration::iterator ed = end();
      while (it != ed)
      {
            ostr << it->first << ": " << it->second << "\n";
            ++it;
      }
}


00107 void PropertyFileConfiguration::save(const std::string& path) const
{
      std::ofstream ostr(Path::transcode(path).c_str());
      if (ostr.good())
      {
            save(ostr);
            ostr.flush();
            if (!ostr.good()) throw Poco::WriteFileException(path);
      }
      else throw Poco::CreateFileException(path);
}


void PropertyFileConfiguration::parseLine(std::istream& istr)
{
      static const int eof = std::char_traits<char>::eof(); 
      std::locale loc;

      int c = istr.get();
      while (c != eof && isspace((char) c, loc)) c = istr.get();
      if (c != eof)
      {
            if (c == '#' || c == '!')
            {
                  while (c != eof && c != '\n' && c != '\r') c = istr.get();
            }
            else
            {
                  std::string key;
                  while (c != eof && c != '=' && c != ':' && c != '\r' && c != '\n') { key += (char) c; c = istr.get(); }
                  std::string value;
                  if (c == '=' || c == ':')
                  {
                        c = readChar(istr);
                        while (c != eof && c) { value += (char) c; c = readChar(istr); }
                  }
                  setRaw(trim(key), trim(value));
            }
      }
}


int PropertyFileConfiguration::readChar(std::istream& istr)
{
      int c = istr.get();
      if (c == '\\')
      {
            c = istr.get();
            switch (c)
            {
            case 't':
                  return '\t';
            case 'r':
                  return '\r';
            case 'n':
                  return '\n';
            case 'f':
                  return '\f';
            case '\r':
                  if (istr.peek() == '\n')
                        istr.get();
                  return ' ';
            case '\n':
                  return ' ';
            default:
                  return c;
            }
      }
      else if (c == '\n' || c == '\r')
            return 0;
      else
            return c;
}


} } // namespace Poco::Util

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