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/**
 * Copyright (C) 2010-2018 Gordon Fraser, Andrea Arcuri and EvoSuite
 * contributors
 *
 * This file is part of EvoSuite.
 *
 * EvoSuite is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3.0 of the License, or
 * (at your option) any later version.
 *
 * EvoSuite 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
 * Lesser Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with EvoSuite. If not, see .
 */
package org.evosuite.instrumentation.error;

import org.objectweb.asm.Opcodes;

public class DivisionByZeroInstrumentation extends ErrorBranchInstrumenter {

	public DivisionByZeroInstrumentation(ErrorConditionMethodAdapter mv) {
		super(mv);
	}

	@Override
	public void visitInsn(int opcode) {
		// Check *DIV for divisonbyzero
		if (opcode == Opcodes.IDIV || opcode == Opcodes.IREM) {
			mv.visitInsn(Opcodes.DUP);
			insertBranch(Opcodes.IFNE, "java/lang/ArithmeticException");

		} else if (opcode == Opcodes.LDIV || opcode == Opcodes.LREM) {
			mv.visitInsn(Opcodes.DUP2);
			mv.visitLdcInsn(0L);
			mv.visitInsn(Opcodes.LCMP);
			insertBranch(Opcodes.IFNE, "java/lang/ArithmeticException");
		}
		// TODO: Could add a branch also for doubles, but not throw an exception?
	}
}