hotspot/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.jtt/src/org/graalvm/compiler/jtt/loop/LoopParseLong.java

/*
 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package org.graalvm.compiler.jtt.loop;

import org.junit.Test;

import org.graalvm.compiler.jtt.JTTTest;

public class LoopParseLong extends JTTTest {

    @SuppressWarnings("unused")
    public static long testShortened(String s, int radix) throws NumberFormatException {
        long result = 0;
        boolean negative = false;
        int len = s.length();
        char firstChar = s.charAt(0);
        if (firstChar < '0') {
            if (firstChar == '-') {
                negative = true;
            } else if (firstChar != '+') {
                throw new NumberFormatException();
            }
            if (len == 1) {
                throw new NumberFormatException();
            }
        }
        return result;
    }

    public static long test(String s, int radix) throws NumberFormatException {
        if (s == null) {
            throw new NumberFormatException("null");
        }
        if (radix < Character.MIN_RADIX) {
            throw new NumberFormatException("radix " + radix + " less than Character.MIN_RADIX");
        }
        if (radix > Character.MAX_RADIX) {
            throw new NumberFormatException("radix " + radix + " greater than Character.MAX_RADIX");
        }
        long result = 0;
        boolean negative = false;
        int i = 0;
        int len = s.length();
        long limit = -Long.MAX_VALUE;
        long multmin;
        int digit;
        if (len > 0) {
            char firstChar = s.charAt(0);
            if (firstChar < '0') {
                if (firstChar == '-') {
                    negative = true;
                    limit = Long.MIN_VALUE;
                } else if (firstChar != '+') {
                    throw new NumberFormatException();
                }
                if (len == 1) {
                    throw new NumberFormatException();
                }
                i++;
            }
            multmin = limit / radix;
            while (i < len) {
                digit = Character.digit(s.charAt(i++), radix);
                if (digit < 0) {
                    throw new NumberFormatException();
                }
                if (result < multmin) {
                    throw new NumberFormatException();
                }
                result *= radix;
                if (result < limit + digit) {
                    throw new NumberFormatException();
                }
                result -= digit;
            }
        } else {
            throw new NumberFormatException();
        }
        return negative ? result : -result;
    }

    @Test
    public void run0() throws Throwable {
        runTest("testShortened", "7", 10);
    }

    @Test
    public void run1() throws Throwable {
        runTest("testShortened", "-100", 10);
    }

    @Test
    public void run2() throws Throwable {
        runTest("test", "7", 10);
    }

    @Test
    public void run3() throws Throwable {
        runTest("test", "-100", 10);
    }
}