/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.lucene.util;
/*
* Some of this code came from the excellent Unicode
* conversion examples from:
*
* http://www.unicode.org/Public/PROGRAMS/CVTUTF
*
* Full Copyright for that code follows:
*/
/*
* Copyright 2001-2004 Unicode, Inc.
*
* Disclaimer
*
* This source code is provided as is by Unicode, Inc. No claims are
* made as to fitness for any particular purpose. No warranties of any
* kind are expressed or implied. The recipient agrees to determine
* applicability of information provided. If this file has been
* purchased on magnetic or optical media from Unicode, Inc., the
* sole remedy for any claim will be exchange of defective media
* within 90 days of receipt.
*
* Limitations on Rights to Redistribute This Code
*
* Unicode, Inc. hereby grants the right to freely use the information
* supplied in this file in the creation of products supporting the
* Unicode Standard, and to make copies of this file in any form
* for internal or external distribution as long as this notice
* remains attached.
*/
/*
* Additional code came from the IBM ICU library.
*
* http://www.icu-project.org
*
* Full Copyright for that code follows.
*/
/*
* Copyright (C) 1999-2010, International Business Machines
* Corporation and others. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, and/or sell copies of the
* Software, and to permit persons to whom the Software is furnished to do so,
* provided that the above copyright notice(s) and this permission notice appear
* in all copies of the Software and that both the above copyright notice(s) and
* this permission notice appear in supporting documentation.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN THIS NOTICE BE
* LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR
* ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Except as contained in this notice, the name of a copyright holder shall not
* be used in advertising or otherwise to promote the sale, use or other
* dealings in this Software without prior written authorization of the
* copyright holder.
*/
public class TestUnicodeUtil extends LuceneTestCase {
public void testCodePointCount() {
// Check invalid codepoints.
assertcodePointCountThrowsAssertionOn(asByteArray('z', 0x80, 'z', 'z', 'z'));
assertcodePointCountThrowsAssertionOn(asByteArray('z', 0xc0 - 1, 'z', 'z', 'z'));
// Check 5-byte and longer sequences.
assertcodePointCountThrowsAssertionOn(asByteArray('z', 0xf8, 'z', 'z', 'z'));
assertcodePointCountThrowsAssertionOn(asByteArray('z', 0xfc, 'z', 'z', 'z'));
// Check improperly terminated codepoints.
assertcodePointCountThrowsAssertionOn(asByteArray('z', 0xc2));
assertcodePointCountThrowsAssertionOn(asByteArray('z', 0xe2));
assertcodePointCountThrowsAssertionOn(asByteArray('z', 0xe2, 0x82));
assertcodePointCountThrowsAssertionOn(asByteArray('z', 0xf0));
assertcodePointCountThrowsAssertionOn(asByteArray('z', 0xf0, 0xa4));
assertcodePointCountThrowsAssertionOn(asByteArray('z', 0xf0, 0xa4, 0xad));
// Check some typical examples (multibyte).
assertEquals(0, UnicodeUtil.codePointCount(new BytesRef(asByteArray())));
assertEquals(3, UnicodeUtil.codePointCount(new BytesRef(asByteArray('z', 'z', 'z'))));
assertEquals(2, UnicodeUtil.codePointCount(new BytesRef(asByteArray('z', 0xc2, 0xa2))));
assertEquals(2, UnicodeUtil.codePointCount(new BytesRef(asByteArray('z', 0xe2, 0x82, 0xac))));
assertEquals(2, UnicodeUtil.codePointCount(new BytesRef(asByteArray('z', 0xf0, 0xa4, 0xad, 0xa2))));
// And do some random stuff.
int num = atLeast(50000);
for (int i = 0; i < num; i++) {
final String s = TestUtil.randomUnicodeString(random());
final byte[] utf8 = new byte[UnicodeUtil.maxUTF8Length(s.length())];
final int utf8Len = UnicodeUtil.UTF16toUTF8(s, 0, s.length(), utf8);
assertEquals(s.codePointCount(0, s.length()),
UnicodeUtil.codePointCount(new BytesRef(utf8, 0, utf8Len)));
}
}
private byte[] asByteArray(int... ints) {
byte [] asByteArray = new byte [ints.length];
for (int i = 0; i < ints.length; i++) {
asByteArray[i] = (byte) ints[i];
}
return asByteArray;
}
private void assertcodePointCountThrowsAssertionOn(byte... bytes) {
expectThrows(IllegalArgumentException.class, () -> {
UnicodeUtil.codePointCount(new BytesRef(bytes));
});
}
public void testUTF8toUTF32() {
int[] utf32 = new int[0];
int num = atLeast(50000);
for (int i = 0; i < num; i++) {
final String s = TestUtil.randomUnicodeString(random());
final byte[] utf8 = new byte[UnicodeUtil.maxUTF8Length(s.length())];
final int utf8Len = UnicodeUtil.UTF16toUTF8(s, 0, s.length(), utf8);
utf32 = ArrayUtil.grow(utf32, utf8Len);
final int utf32Len = UnicodeUtil.UTF8toUTF32(new BytesRef(utf8, 0, utf8Len), utf32);
int[] codePoints = s.codePoints().toArray();
if (!ArrayUtil.equals(codePoints, 0, utf32, 0, codePoints.length)) {
System.out.println("FAILED");
for(int j=0;j<s.length();j++) {
System.out.println(" char[" + j + "]=" + Integer.toHexString(s.charAt(j)));
}
System.out.println();
assertEquals(codePoints.length, utf32Len);
for(int j=0;j<codePoints.length;j++) {
System.out.println(" " + Integer.toHexString(utf32[j]) + " vs " + Integer.toHexString(codePoints[j]));
}
fail("mismatch");
}
}
}
public void testNewString() {
final int[] codePoints = {
Character.toCodePoint(Character.MIN_HIGH_SURROGATE,
Character.MAX_LOW_SURROGATE),
Character.toCodePoint(Character.MAX_HIGH_SURROGATE,
Character.MIN_LOW_SURROGATE), Character.MAX_HIGH_SURROGATE, 'A',
-1,};
final String cpString = "" + Character.MIN_HIGH_SURROGATE
+ Character.MAX_LOW_SURROGATE + Character.MAX_HIGH_SURROGATE
+ Character.MIN_LOW_SURROGATE + Character.MAX_HIGH_SURROGATE + 'A';
final int[][] tests = { {0, 1, 0, 2}, {0, 2, 0, 4}, {1, 1, 2, 2},
{1, 2, 2, 3}, {1, 3, 2, 4}, {2, 2, 4, 2}, {2, 3, 0, -1}, {4, 5, 0, -1},
{3, -1, 0, -1}};
for (int i = 0; i < tests.length; ++i) {
int[] t = tests[i];
int s = t[0];
int c = t[1];
int rs = t[2];
int rc = t[3];
try {
String str = UnicodeUtil.newString(codePoints, s, c);
assertFalse(rc == -1);
assertEquals(cpString.substring(rs, rs + rc), str);
continue;
} catch (IndexOutOfBoundsException | IllegalArgumentException e1) {
// Ignored.
}
assertTrue(rc == -1);
}
}
public void testUTF8UTF16CharsRef() {
int num = atLeast(3989);
for (int i = 0; i < num; i++) {
String unicode = TestUtil.randomRealisticUnicodeString(random());
BytesRef ref = new BytesRef(unicode);
CharsRefBuilder cRef = new CharsRefBuilder();
cRef.copyUTF8Bytes(ref);
assertEquals(cRef.toString(), unicode);
}
}
public void testCalcUTF16toUTF8Length() {
int num = atLeast(5000);
for (int i = 0; i < num; i++) {
String unicode = TestUtil.randomUnicodeString(random());
byte[] utf8 = new byte[UnicodeUtil.maxUTF8Length(unicode.length())];
int len = UnicodeUtil.UTF16toUTF8(unicode, 0, unicode.length(), utf8);
assertEquals(len, UnicodeUtil.calcUTF16toUTF8Length(unicode, 0, unicode.length()));
}
}
}