/*
* Copyright (c) 2006-2009 by Abacus Research AG, Switzerland.
* All rights reserved.
*
* This file is part of the Abacus Formula Compiler (AFC).
*
* For commercial licensing, please contact sales(at)formulacompiler.com.
*
* AFC is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* AFC is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with AFC. If not, see <http://www.gnu.org/licenses/>.
*/
package org.formulacompiler.compiler.internal.bytecode;
import java.util.List;
import org.formulacompiler.compiler.CompilerException;
import org.formulacompiler.compiler.internal.expressions.ExpressionNode;
import org.formulacompiler.compiler.internal.expressions.ExpressionNodeForArrayReference;
import org.objectweb.asm.Label;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.commons.GeneratorAdapter;
final class IndexerCompiler extends FinalMethodCompiler
{
private final ExpressionNodeForArrayReference node;
IndexerCompiler( SectionCompiler _section, String _name, ExpressionNodeForArrayReference _node )
{
super( _section, 0, "$idx$" + _name, "(I)"
+ _section.engineCompiler().typeCompiler( _node.getDataType() ).typeDescriptor() );
this.node = _node;
}
@Override
protected void compileBody() throws CompilerException
{
final ExpressionNodeForArrayReference arrayNode = this.node;
final ExpressionCompiler valCompiler = expressionCompiler( arrayNode.getDataType() );
final int valReturn = valCompiler.typeCompiler().returnOpcode();
final GeneratorAdapter mv = mv();
final List<ExpressionNode> vals = arrayNode.arguments();
final int valCnt = vals.size();
if (valCnt > 0) {
mv.visitVarInsn( Opcodes.ILOAD, 1 ); // index
// gen switch
final int[] valIdxs = new int[ valCnt ];
for (int i = 0; i < valCnt; i++) {
valIdxs[ i ] = i;
}
compileTableSwitch( valIdxs, new TableSwitchGenerator()
{
@Override
protected void generateCase( int _key, Label _end ) throws CompilerException
{
final ExpressionNode val = vals.get( _key );
valCompiler.compile( val );
mv.visitInsn( valReturn );
}
} );
}
mv.throwException( ExpressionCompiler.FORMULA_ERROR_TYPE, "#VALUE/REF! because index is out of range in INDEX" );
}
}