optionprocessor.h

This software aims to create an applet and panel tools to manage a wireless interface card, such as

//
// OptionProcessor.h
//
// $Id: //poco/Main/Util/include/Util/OptionProcessor.h#1 $
//
// Definition of the OptionProcessor class.
//
// Copyright (c) 2004-2005, Guenter Obiltschnig/Applied Informatics.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//
// 3. Redistributions in any form must be accompanied by information on
//    how to obtain complete source code for this software and any
//    accompanying software that uses this software.  The source code
//    must either be included in the distribution or be available for no
//    more than the cost of distribution plus a nominal fee, and must be
//    freely redistributable under reasonable conditions.  For an
//    executable file, complete source code means the source code for all
//    modules it contains.  It does not include source code for modules or
//    files that typically accompany the major components of the operating
//    system on which the executable file runs.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//


#ifndef Util_OptionProcessor_INCLUDED
#define Util_OptionProcessor_INCLUDED


#ifndef Util_Util_INCLUDED
#include "Util/Util.h"
#endif
#ifndef STD_SET_INCLUDED
#include <set>
#define STD_SET_INCLUDED
#endif


Util_BEGIN


class OptionSet;


class Util_API OptionProcessor
	/// An OptionProcessor is used to process the command line
	/// arguments of an application.
	///
	/// The process() method takes an argument from the command line.
	/// If that argument starts with an option prefix, the argument
	/// is further processed. Otherwise, the argument is ignored and
	/// false is ignored. The argument must match one of the options
	/// given in the OptionSet that is passed to the OptionProcessor
	/// with the constructor. If an option is part of a group, at most
	/// one option of the group can be passed to the OptionProcessor.
	/// Otherwise an IncompatibleOptionsException is thrown.
	/// If the same option is given multiple times, but the option
	/// is not repeatable, a DuplicateOptionException is thrown.
	/// If the option is not recognized, a UnexpectedArgumentException
	/// is thrown.
	/// If the option requires an argument, but none is given, an
	/// MissingArgumentException is thrown.
	/// If no argument is expected, but one is present, a
	/// UnexpectedArgumentException is thrown.
	/// If a partial option name is ambiguous, an AmbiguousOptionException
	/// is thrown.
	///
	/// The OptionProcessor supports two modes: Unix mode and default mode.
	/// In Unix mode, the option prefix is a dash '-'. A dash must be followed
	/// by a short option name, or another dash, followed by a (partial)
	/// long option name.
	/// In default mode, the option prefix is a slash '/', followed by 
	/// a (partial) long option name.
	/// If the special option '--' is encountered in Unix mode, all following
	/// options are ignored.
{
public:
	OptionProcessor(const OptionSet& options);
		/// Creates the OptionProcessor, using the given OptionSet.

	~OptionProcessor();
		/// Destroys the OptionProcessor.

	void setUnixStyle(bool flag);
		/// Enables (flag == true) or disables (flag == false) Unix-style
		/// option processing.
		///
		/// If Unix-style processing is enabled, options are expected to
		/// begin with a single or a double dash ('-' or '--', respectively).
		/// A single dash must be followed by a short option name. A double
		/// dash must be followed by a (partial) full option name.
		///
		/// If Unix-style processing is disabled, options are expected to
		/// begin with a slash ('/'), followed by a (partial) full option name.

	bool isUnixStyle() const;
		/// Returns true iff Unix-style option processing is enabled.

	bool process(const std::string& argument, std::string& optionName, std::string& optionArg);
		/// Examines and processes the given command line argument.
		///
		/// If the argument begins with an option prefix, the option is processed
		/// and true is returned. The full option name is stored in optionName and the 
		/// option argument, if present, is stored in optionArg.
		///
		/// If the option does not begin with an option prefix, false is returned.

private:
	bool processUnix(const std::string& argument, std::string& optionName, std::string& optionArg);
	bool processDefault(const std::string& argument, std::string& optionName, std::string& optionArg);
	bool processCommon(const std::string& option, bool isShort, std::string& optionName, std::string& optionArg);
	
	const OptionSet& _options;
	bool _unixStyle;
	bool _ignore;
	std::set<std::string> _groups;
	std::set<std::string> _specifiedOptions;
};


//
// inlines
//
inline bool OptionProcessor::isUnixStyle() const
{
	return _unixStyle;
}


Util_END


#endif // Util_OptionProcessor_INCLUDED