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/*
* Copyright (C) 2007-2014 Xagasoft, All rights reserved.
*
* This file is part of the Xagasoft Build and is released under the
* terms of the license contained in the file LICENSE.
*/
#include "functionunique.h"
#include <bu/hash.h>
#include <bu/plugger.h>
PluginInterface3( pluginFunctionUnique, unique, FunctionUnique, Function,
"Mike Buland", 0, 1 );
FunctionUnique::FunctionUnique()
{
}
FunctionUnique::~FunctionUnique()
{
}
Bu::String FunctionUnique::getName() const
{
return "unique";
}
Variable FunctionUnique::call( Variable &input, VarList lParams )
{
if( lParams.getSize() > 0 )
throw Bu::ExceptionBase("Unique does not take any parameters.");
if( input.getType() != Variable::typeList )
throw Bu::ExceptionBase("unique does not work on non-list types.");
Bu::Hash<Bu::String, bool> hHas;
Variable vOut( Variable::typeList );
for( VarList::iterator i = input.begin(); i; i++ )
{
if( (*i).getType() != Variable::typeString )
continue;
Bu::String s = (*i).getString();
if( hHas.has( s ) )
continue;
hHas.insert( s, true );
vOut.append( *i );
}
return vOut;
}
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