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8137326: Methods for comparing CharSequence, StringBuilder, and StringBuffer

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Reviewed-by: rriggs, smarks, sherman, tvaleev
This commit is contained in:
Joe Wang 2018-03-01 15:31:04 -08:00
parent 17b8a043c4
commit 5a7aff9897
10 changed files with 651 additions and 13 deletions
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20
src/java.base/share/classes/java/lang/StringUTF16.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -273,6 +273,20 @@ final class StringUTF16 {
public static int compareTo(byte[] value, byte[] other) {
int len1 = length(value);
int len2 = length(other);
return compareValues(value, other, len1, len2);
}
/*
* Checks the boundary and then compares the byte arrays.
*/
public static int compareTo(byte[] value, byte[] other, int len1, int len2) {
checkOffset(len1, value);
checkOffset(len2, other);
return compareValues(value, other, len1, len2);
}
private static int compareValues(byte[] value, byte[] other, int len1, int len2) {
int lim = Math.min(len1, len2);
for (int k = 0; k < lim; k++) {
char c1 = getChar(value, k);
@ -289,6 +303,10 @@ final class StringUTF16 {
return -StringLatin1.compareToUTF16(other, value);
}
public static int compareToLatin1(byte[] value, byte[] other, int len1, int len2) {
return -StringLatin1.compareToUTF16(other, value, len2, len1);
}
public static int compareToCI(byte[] value, byte[] other) {
int len1 = length(value);
int len2 = length(other);