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// Copyright (c) 2009, Jens Peter Secher <jpsecher@gmail.com>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
// Inspired by Frank-Rene Schaefer GetPot (see
// http://getpot.sourceforge.net/GetPot.html).
//
class GetPot
{
//
// Call with eg. Sys.args() as argument.
//
public function new( args : Array<String> )
{
arguments = new List<List<String>>();
// The sequence is filled up with collected arguments.
var sequence = new List<String>();
for( arg in args )
{
var option = ~/^-/;
if( option.match( arg ) )
{
// If the collected sequence is not empty when the next argument
// is an option, the sequence will have to be flushed and
// restarted.
if( sequence.length != 0 )
{
arguments.add( sequence );
sequence = new List<String>();
}
sequence.add( arg );
}
else
{
sequence.add( arg );
}
}
if( sequence.length != 0 )
{
arguments.add( sequence );
}
// Make sure next() will return null.
nextArg = null;
}
//
// Takes an array of options (eg. ["-C","--check"]) to search for in the
// command line, and returns true if any of those options were found. The
// first such option found is removed from the command line and the next()
// function can then be used to collect following non-option arguments, if
// any.
//
public function got( options : Array<String> ) : Bool
{
cleanup();
for( sequence in arguments )
{
var first = sequence.first();
if( first != null )
{
for( option in options )
{
if( option == first )
{
// Remove the arguments because is has now been processed.
sequence.pop();
// Make sure next() will get the next arguments.
nextArg = sequence;
return true;
}
}
}
}
return false;
}
//
// Returns the next argument following the last got() option and removes
// that argument from the command line. Returns null if there are no more.
//
public function next() : Null<String>
{
if( nextArg == null ) return null;
return nextArg.pop();
}
//
// Returns the first option which has not been got() and removes the option
// from the command line. Returns null if there are no more options.
//
public function unknown() : Null<String>
{
cleanup();
for( sequence in arguments )
{
if( sequence.first() != null )
{
var option = ~/^-/;
if( option.match( sequence.first() ) )
{
return sequence.pop();
}
}
}
return null;
}
//
// Returns the first argument which has not been processed yet and removes
// it from the command line. Returns null if there are no more unprocessed
// arguments. This function should normally only be called after unknown()
// has returned null to ensure that all options have been processed.
//
public function unprocessed() : Null<String>
{
cleanup();
for( sequence in arguments )
{
if( sequence.first() != null )
{
return sequence.pop();
}
}
return null;
}
//
// Each sequence of successive arguments. Every collected option will be
// the first element in one of the sequences. Each individual argument is
// removed from its sequences when it is processed by got(), next(),
// unknown() or unprocessed().
//
var arguments : List<List<String>>;
//
// Remove all initial empty sequences.
//
function cleanup()
{
while( arguments.first() != null && arguments.first().first() == null )
{
arguments.pop();
}
}
//
// Points to the sequence of arguments following the last got() option, or
// null if no got() has succeeded.
//
var nextArg : List<String>;
}
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