archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-08-27 14:54:52 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8240094: Optimize empty substring handling

Browse source 
Reviewed-by: redestad, igerasim, jlaskey
This commit is contained in:
Sergei Tsypanov 2020-02-26 21:24:02 +01:00 • committed by Claes Redestad
parent 257de28b2c
commit f729514ebd
4 changed files with 23 additions and 18 deletions
Download patch file Download diff file Expand all files Collapse all files

11
src/java.base/share/classes/java/lang/StringUTF16.java
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2015, 2020, 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
@ -1016,18 +1016,12 @@ final class StringUTF16 {
public static String stripLeading(byte[] value) {
int length = value.length >>> 1;
int left = indexOfNonWhitespace(value);
if (left == length) {
return "";
}
return (left != 0) ? newString(value, left, length - left) : null;
}
public static String stripTrailing(byte[] value) {
int length = value.length >>> 1;
int right = lastIndexOfNonWhitespace(value);
if (right == 0) {
return "";
}
return (right != length) ? newString(value, 0, right) : null;
}
@ -1132,6 +1126,9 @@ final class StringUTF16 {
}
public static String newString(byte[] val, int index, int len) {
if (len == 0) {
return "";
}
if (String.COMPACT_STRINGS) {
byte[] buf = compress(val, index, len);
if (buf != null) {