1 /*
2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
1449 if (r < SMALL_5_POW.length) {
1450 return bigq.mult(SMALL_5_POW[r]);
1451 } else {
1452 return bigq.mult(big5powRec(r));
1453 }
1454 }
1455
1456 // for debugging ...
1457 /**
1458 * Converts this <code>FDBigInteger</code> to a hexadecimal string.
1459 *
1460 * @return The hexadecimal string representation.
1461 */
1462 public String toHexString(){
1463 if(nWords ==0) {
1464 return "0";
1465 }
1466 StringBuilder sb = new StringBuilder((nWords +offset)*8);
1467 for(int i= nWords -1; i>=0; i--) {
1468 String subStr = Integer.toHexString(data[i]);
1469 for(int j = subStr.length(); j<8; j++) {
1470 sb.append('0');
1471 }
1472 sb.append(subStr);
1473 }
1474 for(int i=offset; i>0; i--) {
1475 sb.append("00000000");
1476 }
1477 return sb.toString();
1478 }
1479
1480 // for debugging ...
1481 /**
1482 * Converts this <code>FDBigInteger</code> to a <code>BigInteger</code>.
1483 *
1484 * @return The <code>BigInteger</code> representation.
1485 */
1486 public BigInteger toBigInteger() {
1487 byte[] magnitude = new byte[nWords * 4 + 1];
1488 for (int i = 0; i < nWords; i++) {
1489 int w = data[i];
1490 magnitude[magnitude.length - 4 * i - 1] = (byte) w;
1491 magnitude[magnitude.length - 4 * i - 2] = (byte) (w >> 8);
1492 magnitude[magnitude.length - 4 * i - 3] = (byte) (w >> 16);
1493 magnitude[magnitude.length - 4 * i - 4] = (byte) (w >> 24);
1494 }
1495 return new BigInteger(magnitude).shiftLeft(offset * 32);
1496 }
|
1 /*
2 * Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
1449 if (r < SMALL_5_POW.length) {
1450 return bigq.mult(SMALL_5_POW[r]);
1451 } else {
1452 return bigq.mult(big5powRec(r));
1453 }
1454 }
1455
1456 // for debugging ...
1457 /**
1458 * Converts this <code>FDBigInteger</code> to a hexadecimal string.
1459 *
1460 * @return The hexadecimal string representation.
1461 */
1462 public String toHexString(){
1463 if(nWords ==0) {
1464 return "0";
1465 }
1466 StringBuilder sb = new StringBuilder((nWords +offset)*8);
1467 for(int i= nWords -1; i>=0; i--) {
1468 String subStr = Integer.toHexString(data[i]);
1469 if (subStr.length() < 8) {
1470 sb.appendN('0', 8 - subStr.length());
1471 }
1472 sb.append(subStr);
1473 }
1474 sb.appendN('0', offset * 8);
1475 return sb.toString();
1476 }
1477
1478 // for debugging ...
1479 /**
1480 * Converts this <code>FDBigInteger</code> to a <code>BigInteger</code>.
1481 *
1482 * @return The <code>BigInteger</code> representation.
1483 */
1484 public BigInteger toBigInteger() {
1485 byte[] magnitude = new byte[nWords * 4 + 1];
1486 for (int i = 0; i < nWords; i++) {
1487 int w = data[i];
1488 magnitude[magnitude.length - 4 * i - 1] = (byte) w;
1489 magnitude[magnitude.length - 4 * i - 2] = (byte) (w >> 8);
1490 magnitude[magnitude.length - 4 * i - 3] = (byte) (w >> 16);
1491 magnitude[magnitude.length - 4 * i - 4] = (byte) (w >> 24);
1492 }
1493 return new BigInteger(magnitude).shiftLeft(offset * 32);
1494 }
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