/*
* 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.Collection;
import org.formulacompiler.compiler.CompilerException;
import org.formulacompiler.compiler.internal.expressions.ArrayDescriptor;
import org.formulacompiler.compiler.internal.expressions.ExpressionNode;
import org.formulacompiler.compiler.internal.expressions.ExpressionNodeForArrayReference;
import org.formulacompiler.compiler.internal.expressions.ExpressionNodeForLetVar;
import org.formulacompiler.compiler.internal.expressions.LetDictionary.LetEntry;
import org.formulacompiler.compiler.internal.model.ExpressionNodeForSubSectionModel;
import org.objectweb.asm.Type;
abstract class HelperCompiler extends ValueMethodCompiler
{
private final ExpressionNode node;
HelperCompiler( SectionCompiler _section, int _access, ExpressionNode _node, Iterable<LetEntry> _closure,
Type... _params )
{
super( _section, _access, _section.newGetterName(), descriptorOf( _params ) + descriptorOf( _section, _closure ),
_node.getDataType() );
this.node = _node;
addClosureToLetDict( _closure, sizeOf( _params ) );
}
HelperCompiler( SectionCompiler _section, ExpressionNode _node, Iterable<LetEntry> _closure )
{
this( _section, 0, _node, _closure );
}
private static String descriptorOf( Type[] _params )
{
StringBuffer b = new StringBuffer();
for (Type param : _params) {
b.append( param.getDescriptor() );
}
return b.toString();
}
private int sizeOf( Type[] _params )
{
int size = 0;
for (Type param : _params) {
size += param.getSize();
}
return size;
}
protected final ExpressionNode node()
{
return this.node;
}
protected final ExpressionNode[] arrayRefElements( ExpressionNode _outerNode, ExpressionNode _arrayRefNode )
throws CompilerException
{
if (_arrayRefNode instanceof ExpressionNodeForArrayReference) {
final Collection<ExpressionNode> args = _arrayRefNode.arguments();
return args.toArray( new ExpressionNode[ args.size() ] );
}
else if (_arrayRefNode instanceof ExpressionNodeForLetVar) {
final ExpressionNodeForLetVar var = (ExpressionNodeForLetVar) _arrayRefNode;
final Object res = letDict().lookup( var.varName() );
final ExpressionNode val = (ExpressionNode) res;
return arrayRefElements( _outerNode, val );
}
else {
throw new CompilerException.UnsupportedExpression( "Array reference expected in "
+ _outerNode.describe() + "." );
}
}
protected final ArrayDescriptor arrayDescriptor( ExpressionNode _outerNode, ExpressionNode _rangeNode )
throws CompilerException
{
if (_rangeNode instanceof ExpressionNodeForArrayReference) {
return ((ExpressionNodeForArrayReference) _rangeNode).arrayDescriptor();
}
else {
throw new CompilerException.UnsupportedExpression( "Array reference expected in "
+ _outerNode.describe() + "." );
}
}
protected static final ExpressionNode firstLocalElementIn( Iterable<ExpressionNode> _elts )
{
for (ExpressionNode elt : _elts) {
if (!(elt instanceof ExpressionNodeForSubSectionModel)) {
return elt;
}
}
return null;
}
}