SwitchArg.h

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/****************************************************************************** 
 * 
 *  file:  SwitchArg.h
 * 
 *  Copyright (c) 2003, Michael E. Smoot .
 *  Copyright (c) 2004, Michael E. Smoot, Daniel Aarno.
 *  All rights reverved.
 * 
 *  See the file COPYING in the top directory of this distribution for
 *  more information.
 *  
 *  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 AND NONINFRINGEMENT. IN NO EVENT SHALL 
 *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
 *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
 *  DEALINGS IN THE SOFTWARE.  
 *  
 *****************************************************************************/ 


#ifndef TCLAP_SWITCH_ARG_H
#define TCLAP_SWITCH_ARG_H

#include <string>
#include <vector>

#include <tclap/Arg.h>

namespace TCLAP {

class SwitchArg : public Arg
{
protected:

  bool _value;

public:

  SwitchArg(const std::string& flag, 
            const std::string& name, 
            const std::string& desc,
            bool def = false,
            Visitor* v = NULL);

          
  SwitchArg(const std::string& flag, 
            const std::string& name, 
            const std::string& desc,
            CmdLineInterface& parser,
            bool def = false,
            Visitor* v = NULL);
          
          
  virtual bool processArg(int* i, std::vector<std::string>& args); 

  bool combinedSwitchesMatch(std::string& combined);

  bool getValue();
  
  virtual std::string getValueAsString()const;

};

//BEGIN SwitchArg.cpp
inline SwitchArg::SwitchArg(const std::string& flag, 
                            const std::string& name, 
                            const std::string& desc, 
                            bool _default,
                            Visitor* v )
  : Arg(flag, name, desc, false, false, v),
    _value( _default )
{ }

inline SwitchArg::SwitchArg(const std::string& flag, 
                            const std::string& name, 
                            const std::string& desc, 
                            CmdLineInterface& parser,
                            bool _default,
                            Visitor* v )
  : Arg(flag, name, desc, false, false, v),
    _value( _default )
{ 
  parser.add( this );
}

inline bool SwitchArg::getValue() { return _value; }

inline std::string SwitchArg::getValueAsString()const
{
  std::string res;
  if( _value )
    {
    res = "1";
    }
  else
    {
    res = "0";
    }
  return res;
}

inline bool SwitchArg::combinedSwitchesMatch(std::string& combinedSwitches )
{
  // make sure this is actually a combined switch
  if ( combinedSwitches[0] != Arg::flagStartString()[0] )
    return false;

  // make sure it isn't a long name 
  if ( combinedSwitches.substr( 0, Arg::nameStartString().length() ) == 
       Arg::nameStartString() )
    return false;

  // ok, we're not specifying a ValueArg, so we know that we have
  // a combined switch list.  
  if (_flag.length() > 0)
    {
    for ( unsigned int i = 1; i < combinedSwitches.length(); i++ )
      if ( combinedSwitches[i] == _flag[0] ) 
        {
        // update the combined switches so this one is no longer present
        // this is necessary so that no unlabeled args are matched
        // later in the processing.
        //combinedSwitches.erase(i,1);
        combinedSwitches[i] = Arg::blankChar(); 
        return true;
        }
    }
  // none of the switches passed in the list match. 
  return false;  
}


inline bool SwitchArg::processArg(int *i, std::vector<std::string>& args)
{
  if ( _ignoreable && Arg::ignoreRest() )
    return false;

  if ( argMatches( args[*i] ) || combinedSwitchesMatch( args[*i] ) )
    {
    // If we match on a combined switch, then we want to return false
    // so that other switches in the combination will also have a
    // chance to match.
    bool ret = false;
    if ( argMatches( args[*i] ) )
      ret = true;

    if ( _alreadySet || ( !ret && combinedSwitchesMatch( args[*i] ) ) )
      throw(CmdLineParseException("Argument already set!", toString()));  

    _alreadySet = true;

    if ( _value == true )
      _value = false;
    else
      _value = true;

    _checkWithVisitor();

    return ret;
    }
  else
    return false;
}

//End SwitchArg.cpp

} //namespace TCLAP

#endif