90 lines
3.1 KiB
Java
90 lines
3.1 KiB
Java
/*
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* Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package vm.share;
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import java.io.ByteArrayOutputStream;
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import java.util.Random;
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import java.util.function.Predicate;
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public class StringUtils {
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public static byte[] binaryReplace(final byte[] src, String search,
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String replacement) {
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if (search.length() == 0)
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return src;
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int nReplaced = 0;
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try {
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final byte[] bSrch = search.getBytes("ASCII");
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final byte[] bRepl = replacement.getBytes("ASCII");
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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try {
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searching: for (int i = 0; i < src.length; i++) {
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if (src[i] == bSrch[0]) {
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replacing: do {
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for (int ii = 1; ii < Math.min(bSrch.length,
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src.length - i); ii++)
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if (src[i + ii] != bSrch[ii])
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break replacing;
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out.write(bRepl);
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i += bSrch.length - 1;
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nReplaced++;
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continue searching;
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} while (false);
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}
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out.write(src[i]);
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}
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return out.toByteArray();
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} finally {
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out.close();
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}
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} catch (Exception e) {
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RuntimeException t = new RuntimeException("Test internal error");
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t.initCause(e);
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throw t;
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}
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}
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public static String generateString(Random rng, int length,
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Predicate<Character> predicate) {
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if (length <= 0) {
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throw new IllegalArgumentException("length <= 0");
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}
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StringBuilder builder = new StringBuilder(length);
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for (int i = 0; i < length; ++i) {
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char tmp;
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do {
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tmp = (char) rng.nextInt(Character.MAX_VALUE);
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} while (!predicate.test(tmp));
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builder.append(tmp);
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}
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return builder.toString();
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}
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}
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