/*

 * 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.

 *

 */

/*

 * @test

 * @bug 4103117 4331084 4488017 4490929 6255285 6268365

 * @summary Tests the BigDecimal string constructor.

 */

import java.math.*;

import java.util.Random;

public class StringConstructor {

    private static int seed = new Random().nextInt();

    private static Random rnd = new Random(seed);

    public static void main(String[] args) throws Exception {

        constructWithError("");

        constructWithError("+");

        constructWithError("-");

        constructWithError("+e");

        constructWithError("-e");

        constructWithError("e+");

        constructWithError("1.-0");

        constructWithError(".-123");

        constructWithError("-");

        constructWithError("--1.1");

        constructWithError("-+1.1");

        constructWithError("+-1.1");

        constructWithError("1-.1");

        constructWithError("1+.1");

        constructWithError("1.111+1");

        constructWithError("1.111-1");

        constructWithError("11.e+");

        constructWithError("11.e-");

        constructWithError("11.e+-");

        constructWithError("11.e-+");

        constructWithError("11.e-+1");

        constructWithError("11.e+-1");

        // Range checks

        constructWithError("1e"+Integer.MIN_VALUE);

        constructWithError("10e"+Integer.MIN_VALUE);

        constructWithError("0.01e"+Integer.MIN_VALUE);

        constructWithError("1e"+((long)Integer.MIN_VALUE-1));

        constructWithError("1e"+((long)Integer.MAX_VALUE + 1));

        leadingExponentZeroTest();

        nonAsciiZeroTest();

        // Roundtrip tests

        for (int i=0; i<100; i++) {

            int size = rnd.nextInt(100) + 1;

            BigInteger bi = new BigInteger(size, rnd);

            if (rnd.nextBoolean())

                bi = bi.negate();

            int decimalLength = bi.toString().length();

            int scale = rnd.nextInt(decimalLength);

            BigDecimal bd = new BigDecimal(bi, scale);

            String bdString = bd.toString();

            // System.err.println("bi" + bi.toString() + "\tscale " + scale);

            // System.err.println("bd string: " + bdString);

            BigDecimal bdDoppel = new BigDecimal(bdString);

            if (!bd.equals(bdDoppel)) {

                System.err.println("Random number seed = " + seed);

                System.err.println("bd string: scale: " + bd.scale() +

                                   "\t" + bdString);

                System.err.println("bd doppel: scale: " + bdDoppel.scale() +

                                   "\t" + bdDoppel.toString());

                throw new RuntimeException("String constructor failure.");

            }

        }

    }

    /*

     * Verify precision is set properly if the significand has

     * non-ASCII leading zeros.

     */

    private static void nonAsciiZeroTest() {

        String values[] = {

            "00004e5",

            "\u0660\u0660\u0660\u06604e5",

        };

        BigDecimal expected = new BigDecimal("4e5");

        for(String s : values) {

            BigDecimal tmp = new BigDecimal(s);

            // System.err.println("Testing " + s);

            if (! expected.equals(tmp) || tmp.precision() != 1) {

                System.err.println("Bad conversion of " + s + "got " +

                                   tmp + "precision = " + tmp.precision());

                throw new RuntimeException("String constructor failure.");

            }

        }

    }

    private static void leadingExponentZeroTest() {

        BigDecimal twelve = new BigDecimal("12");

        BigDecimal onePointTwo = new BigDecimal("1.2");

        String start = "1.2e0";

        String end = "1";

        String middle = "";

        // Test with more excess zeros than the largest number of

        // decimal digits needed to represent a long

        int limit  = ((int)Math.log10(Long.MAX_VALUE)) + 6;

        for(int i = 0; i < limit; i++, middle += "0") {

            String t1 = start + middle;

            String t2 = t1 + end;

            // System.out.println(i + "\t" + t1 + "\t" + t2);

            testString(t1, onePointTwo);

            testString(t2, twelve);

        }

    }

    private static void testString(String s, BigDecimal expected) {

        testString0(s, expected);

        testString0(switchZero(s), expected);

    }

    private static void testString0(String s, BigDecimal expected) {

        if (!expected.equals(new BigDecimal(s)))

            throw new RuntimeException(s + " is not equal to " + expected);

    }

    private static String switchZero(String s) {

        return s.replace('0', '\u0660'); // Arabic-Indic zero

    }

    private static void constructWithError(String badString) {

        try {

            BigDecimal d = new BigDecimal(badString);

            throw new RuntimeException(badString + " accepted");

        } catch(NumberFormatException e) {

        }

    }

}