> This PR adds an internal method to calculate hash code from the provided > integer array, offset and length into that array, and the initial hash code > value. > > Current options for calculating a hash code for int[] are inflexible. It's > either ArraysSupport.vectorizedHashCode with an offset, length and initial > value, or Arrays.hashCode with just an array. > > For an arbitrary int[], unconditional vectorization might be unwarranted or > puzzling. Unfortunately, it's the only hash code method that operates on an > array subrange or accepts the initial hash code value. > > A more convenient method could be added and then used, for example, here: > > * > https://github.com/openjdk/jdk/blob/0ef03f122866f010ebf50683097e9b92e41cdaad/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java#L1076-L1083 > > * > https://github.com/openjdk/jdk/blob/0ef03f122866f010ebf50683097e9b92e41cdaad/src/java.base/share/classes/java/util/ArrayList.java#L669-L680 > > * > https://github.com/openjdk/jdk/blob/0ef03f122866f010ebf50683097e9b92e41cdaad/src/java.base/share/classes/sun/security/pkcs10/PKCS10.java#L356-L362 > > This PR adds such a method and provides tests for it. Additionally, this PR > adds tests for `null` passed to `java.util.Arrays.hashCode` overloads, > behaviour which was specified but untested.
Pavel Rappo has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision: - Merge branch 'master' into 8311864 - Initial commit ------------- Changes: - all: https://git.openjdk.org/jdk/pull/14831/files - new: https://git.openjdk.org/jdk/pull/14831/files/a92c5c31..f874f161 Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=14831&range=01 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14831&range=00-01 Stats: 314754 lines in 7332 files changed: 162080 ins; 80999 del; 71675 mod Patch: https://git.openjdk.org/jdk/pull/14831.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/14831/head:pull/14831 PR: https://git.openjdk.org/jdk/pull/14831
