1 /*
2 * Copyright (c) 2005, 2015, 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
23 * questions.
24 */
25 /*
26 *******************************************************************************
27 * Copyright (C) 1996-2011, International Business Machines Corporation and *
28 * others. All Rights Reserved. *
29 *******************************************************************************
30 */
31
32 package sun.text.normalizer;
33
34 import java.io.IOException;
35 import java.util.Locale;
36
37 final class Utility {
38
39 /**
40 * Convert characters outside the range U+0020 to U+007F to
41 * Unicode escapes, and convert backslash to a double backslash.
42 */
43 public static final String escape(String s) {
44 StringBuilder buf = new StringBuilder();
45 for (int i=0; i<s.length(); ) {
46 int c = Character.codePointAt(s, i);
47 i += UTF16.getCharCount(c);
48 if (c >= ' ' && c <= 0x007F) {
49 if (c == '\\') {
50 buf.append("\\\\"); // That is, "\\"
51 } else {
52 buf.append((char)c);
53 }
54 } else {
55 boolean four = c <= 0xFFFF;
56 buf.append(four ? "\\u" : "\\U");
57 buf.append(hex(c, four ? 4 : 8));
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1 /*
2 * Copyright (c) 2005, 2020, 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
23 * questions.
24 */
25 /*
26 *******************************************************************************
27 * Copyright (C) 1996-2011, International Business Machines Corporation and *
28 * others. All Rights Reserved. *
29 *******************************************************************************
30 */
31
32 package jdk.internal.icu.impl;
33
34 import jdk.internal.icu.lang.UCharacter;
35 import jdk.internal.icu.text.UTF16;
36
37 import java.io.IOException;
38 import java.util.Locale;
39
40 public final class Utility {
41
42 /**
43 * Convert characters outside the range U+0020 to U+007F to
44 * Unicode escapes, and convert backslash to a double backslash.
45 */
46 public static final String escape(String s) {
47 StringBuilder buf = new StringBuilder();
48 for (int i=0; i<s.length(); ) {
49 int c = Character.codePointAt(s, i);
50 i += UTF16.getCharCount(c);
51 if (c >= ' ' && c <= 0x007F) {
52 if (c == '\\') {
53 buf.append("\\\\"); // That is, "\\"
54 } else {
55 buf.append((char)c);
56 }
57 } else {
58 boolean four = c <= 0xFFFF;
59 buf.append(four ? "\\u" : "\\U");
60 buf.append(hex(c, four ? 4 : 8));
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