package railo.transformer.bytecode.op;
import org.objectweb.asm.Label;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import org.objectweb.asm.commons.GeneratorAdapter;
import org.objectweb.asm.commons.Method;
import railo.transformer.bytecode.BytecodeContext;
import railo.transformer.bytecode.BytecodeException;
import railo.transformer.bytecode.expression.ExprBoolean;
import railo.transformer.bytecode.expression.Expression;
import railo.transformer.bytecode.expression.ExpressionBase;
import railo.transformer.bytecode.util.Methods;
import railo.transformer.bytecode.util.Methods_Operator;
import railo.transformer.bytecode.util.Types;
public final class OPDecision extends ExpressionBase implements ExprBoolean {
private Expression right;
private Expression left;
private int operation;
public static final int LT=GeneratorAdapter.LT;
public static final int LTE=GeneratorAdapter.LE;
public static final int GTE=GeneratorAdapter.GE;
public static final int GT=GeneratorAdapter.GT;
public static final int EQ=GeneratorAdapter.EQ;
public static final int NEQ=GeneratorAdapter.NE;
public static final int CT = 1000;
public static final int NCT = 1001;
public static final int EEQ = 1002;
public static final int NEEQ = 1003;
// int compare (Object, Object)
final public static Method METHOD_COMPARE = new Method("compare",
Types.INT_VALUE,
new Type[]{Types.OBJECT,Types.OBJECT});
private OPDecision(Expression left, Expression right, int operation) {
super(left.getStart(),right.getEnd());
this.left=left;
this.right=right;
this.operation=operation;
}
/**
* Create a String expression from a operation
* @param left
* @param right
*
* @return String expression
*/
public static ExprBoolean toExprBoolean(Expression left, Expression right, int operation) {
return new OPDecision(left,right,operation);
}
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_BOOLEAN_FROM_BOOLEAN);
return Types.BOOLEAN;
}
if(operation==CT) {
left.writeOut(bc,MODE_REF);
right.writeOut(bc,MODE_REF);
adapter.invokeStatic(Types.OPERATOR,Methods_Operator.OPERATOR_CT);
}
else if(operation==NCT) {
left.writeOut(bc,MODE_REF);
right.writeOut(bc,MODE_REF);
adapter.invokeStatic(Types.OPERATOR,Methods_Operator.OPERATOR_NCT);
}
else if(operation==EEQ) {
left.writeOut(bc,MODE_REF);
right.writeOut(bc,MODE_REF);
adapter.invokeStatic(Types.OPERATOR,Methods_Operator.OPERATOR_EEQ);
}
else if(operation==NEEQ) {
left.writeOut(bc,MODE_REF);
right.writeOut(bc,MODE_REF);
adapter.invokeStatic(Types.OPERATOR,Methods_Operator.OPERATOR_NEEQ);
}
else {
int iLeft = Types.getType(left.writeOut(bc,MODE_VALUE));
int iRight = Types.getType(right.writeOut(bc,MODE_VALUE));
adapter.invokeStatic(Types.OPERATOR,Methods_Operator.OPERATORS[iLeft][iRight]);
adapter.visitInsn(Opcodes.ICONST_0);
Label l1 = new Label();
Label l2 = new Label();
adapter.ifCmp(Type.INT_TYPE,operation,l1);
//adapter.visitJumpInsn(Opcodes.IF_ICMPEQ, l1);
adapter.visitInsn(Opcodes.ICONST_0);
adapter.visitJumpInsn(Opcodes.GOTO, l2);
adapter.visitLabel(l1);
adapter.visitInsn(Opcodes.ICONST_1);
adapter.visitLabel(l2);
}
return Types.BOOLEAN_VALUE;
}
}