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#include "functionrange.h"
#include <bu/plugger.h>
PluginInterface3( pluginFunctionRange, range, FunctionRange, Function,
"Mike Buland", 0, 1 );
FunctionRange::FunctionRange()
{
}
FunctionRange::~FunctionRange()
{
}
Bu::String FunctionRange::getName() const
{
return "range";
}
Variable FunctionRange::call( Variable &input, VarList lParams )
{
Variable vRet( Variable::typeList );
int iLow = 1;
int iHigh = 1;
int iStep = 1;
if( lParams.getSize() == 1 )
{
iHigh = lParams.first().toInt();
}
else if( lParams.getSize() == 2 )
{
iLow = lParams.first().toInt();
iHigh = lParams.last().toInt();
}
else if( lParams.getSize() == 3 )
{
VarList::iterator i = lParams.begin();
iLow = (*i).toInt();
i++;
iHigh = (*i).toInt();
i++;
iStep = (*i).toInt();
}
if( iStep == 0 )
throw Bu::ExceptionBase("Step cannot be zero.");
if( iHigh < iLow )
{
if( iStep > 0 )
throw Bu::ExceptionBase(
"If start is less than end then step must be negative.");
for( int j = iLow; j >= iHigh; j += iStep )
{
vRet.append( Variable( j ) );
}
}
else
{
if( iStep < 0 )
throw Bu::ExceptionBase(
"If start is more than end then step must be positive.");
for( int j = iLow; j <= iHigh; j += iStep )
{
vRet.append( Variable( j ) );
}
}
return vRet;
}
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