8333843: Provide guidelines on MemorySegment to read strings with known lengths

[minborg]

This PR proposes to add a new overload to MemorySegment::getString whereby it is possible to pass in a known byte length of the content in a segment that should be converted to a String. This is useful in case one already knows the byte length and thereby does not need to scan for a null terminator.

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Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8333843: Provide guidelines on MemorySegment to read strings with known lengths (Enhancement - P4)

Reviewers

• Maurizio Cimadamore (@mcimadamore - Reviewer)

Reviewing

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$ git fetch https://git.openjdk.org/jdk.git pull/20725/head:pull/20725
$ git checkout pull/20725

Update a local copy of the PR:
$ git checkout pull/20725
$ git pull https://git.openjdk.org/jdk.git pull/20725/head

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$ git pr checkout 20725

View PR using the GUI difftool:
$ git pr show -t 20725

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https://git.openjdk.org/jdk/pull/20725.diff

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[bridgekeeper]

👋 Welcome back pminborg! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

@minborg This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8333843: Provide guidelines on MemorySegment to read strings with known lengths

Reviewed-by: mcimadamore

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 31 new commits pushed to the master branch:

• 358ff19: 8339727: Open source several AWT focus tests - series 1
• 0c36177: 8340089: Simplify SegmentBulkOperations::powerOfProperty
• bacd046: 8321010: RISC-V: C2 RoundVF
• 5709c37: 8340081: Test java/foreign/TestLinker.java failed failed: missing permission java.lang.foreign.native.threshold.power.fill
• b88ff9c: 8339849: Enumerate opto and C1 stubs, generate enums, names, fields and generator calls
• ae75ca0: 8314842: zgc/genzgc tests ignore vm flags
• 5e5942a: 8339794: Open source closed choice tests Azure Pipelines continuous integration (without running tests, for now) #1
• 81ff91e: 8339531: Improve performance of MemorySegment::mismatch
• ab9b72c: 8329035: New Data Destination instructions support
• 7f1dae1: 8339874: Avoid duplicate checking of trailing slash in ZipFile.getZipEntry
• ... and 21 more: https://git.openjdk.org/jdk/compare/8fce5275fc94ebc404a6a37f5ea0407140de63c1...master

As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

[openjdk]

@minborg The following label will be automatically applied to this pull request:

• core-libs

When this pull request is ready to be reviewed, an "RFR" email will be sent to the corresponding mailing list. If you would like to change these labels, use the /label pull request command.

[mlbridge]

Webrevs

• 02: Full - Incremental (976d4465)
• 01: Full - Incremental (cc862a05)
• 00: Full (8fb0e616)

[mcimadamore]

Changes look good

[minborg]

/integrate

[openjdk]

Going to push as commit 3e0da58.
Since your change was applied there have been 35 commits pushed to the master branch:

• 3c4d15b: 8334301: Errors in jpackage man page
• 4d01178: 8339927: Man page update for deprecating jhsdb debugd for removal
• bd44cf8: 8330302: strace004 can still fail
• 8a4ea09: 8336492: Regression in lambda serialization
• 358ff19: 8339727: Open source several AWT focus tests - series 1
• 0c36177: 8340089: Simplify SegmentBulkOperations::powerOfProperty
• bacd046: 8321010: RISC-V: C2 RoundVF
• 5709c37: 8340081: Test java/foreign/TestLinker.java failed failed: missing permission java.lang.foreign.native.threshold.power.fill
• b88ff9c: 8339849: Enumerate opto and C1 stubs, generate enums, names, fields and generator calls
• ae75ca0: 8314842: zgc/genzgc tests ignore vm flags
• ... and 25 more: https://git.openjdk.org/jdk/compare/8fce5275fc94ebc404a6a37f5ea0407140de63c1...master

Your commit was automatically rebased without conflicts.

[openjdk]

@minborg Pushed as commit 3e0da58.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.