package railo.transformer.bytecode.op;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import org.objectweb.asm.commons.GeneratorAdapter;
import railo.runtime.exp.TemplateException;
import railo.transformer.bytecode.BytecodeContext;
import railo.transformer.bytecode.BytecodeException;
import railo.transformer.bytecode.Literal;
import railo.transformer.bytecode.Position;
import railo.transformer.bytecode.cast.CastDouble;
import railo.transformer.bytecode.expression.ExprDouble;
import railo.transformer.bytecode.expression.Expression;
import railo.transformer.bytecode.expression.ExpressionBase;
import railo.transformer.bytecode.literal.LitDouble;
import railo.transformer.bytecode.util.Methods;
import railo.transformer.bytecode.util.Types;
public final class OpNegateNumber extends ExpressionBase implements ExprDouble {
private ExprDouble expr;
public static final int PLUS = 0;
public static final int MINUS = 1;
private OpNegateNumber(Expression expr, Position start, Position end) {
super(start,end);
this.expr=CastDouble.toExprDouble(expr);
}
/**
* Create a String expression from a Expression
* @param left
* @param right
*
* @return String expression
* @throws TemplateException
*/
public static ExprDouble toExprDouble(Expression expr, Position start, Position end) {
if(expr instanceof Literal) {
Double d=((Literal) expr).getDouble(null);
if(d!=null) {
return LitDouble.toExprDouble(-d.doubleValue(),start,end);
}
}
return new OpNegateNumber(expr,start,end);
}
public static ExprDouble toExprDouble(Expression expr, int operation, Position start, Position end) {
if(operation==MINUS) return toExprDouble(expr, start,end);
return CastDouble.toExprDouble(expr);
}
/**
*
* @see railo.transformer.bytecode.expression.ExpressionBase#_writeOut(org.objectweb.asm.commons.GeneratorAdapter, int)
*/
public Type _writeOut(BytecodeContext bc, int mode) throws BytecodeException {
GeneratorAdapter adapter = bc.getAdapter();
if(mode==MODE_REF) {
_writeOut(bc,MODE_VALUE);
adapter.invokeStatic(Types.CASTER,Methods.METHOD_TO_DOUBLE_FROM_DOUBLE);
return Types.DOUBLE;
}
expr.writeOut(bc, MODE_VALUE);
adapter.visitInsn(Opcodes.DNEG);
return Types.DOUBLE_VALUE;
}
}