ayush00git opened a new pull request, #3992: URL: https://github.com/apache/fory/pull/3992
<!-- **Thanks for contributing to Apache Fory™.** **If this is your first time opening a PR on fory, you can refer to [CONTRIBUTING.md](https://github.com/apache/fory/blob/main/CONTRIBUTING.md).** Contribution Checklist - The **Apache Fory™** community has requirements on the naming of pr titles. You can also find instructions in [CONTRIBUTING.md](https://github.com/apache/fory/blob/main/CONTRIBUTING.md). - Apache Fory™ has a strong focus on performance. If the PR you submit will have an impact on performance, please benchmark it first and provide the benchmark result here. --> ## Why? zigzag is computed in double precision, so any negative value with magnitude above 2^52 rounds to an even zigzag and decodes as positive: -4503599627370497n round-trips as +4503599627370496n. Also reachable through writeSliInt64. ## What does this PR do? the writeVarInt64 fast path now requires v >= -(2^52) in both the number and safe-range bigint branches; anything more negative falls through to the exact bigint zigzag (v << 1n) ^ (v >> 63n). writeSliInt64 is fixed too since its big-long path delegates here. A short comment on the new constant records the invariant. ## Related issues <!-- Is there any related issue? If this PR closes them you say say fix/closes: - #xxxx0 - #xxxx1 - Fixes #xxxx2 --> ## AI Contribution Checklist <!-- Full requirements and disclosure template: https://github.com/apache/fory/blob/main/AI_POLICY.md#9-contributor-checklist-for-ai-assisted-prs --> - [ ] Substantial AI assistance was used in this PR: `yes` / `no` - [ ] If `yes`, I included a completed [AI Contribution Checklist](https://github.com/apache/fory/blob/main/AI_POLICY.md#9-contributor-checklist-for-ai-assisted-prs) in this PR description and the required `AI Usage Disclosure`. - [ ] If `yes`, my PR description includes the required `ai_review` summary and screenshot evidence or equivalent persisted links of the final clean AI review results from both fresh reviewers described in `AI_POLICY.md`, the Fory-guided reviewer and the independent general reviewer, on the current PR diff or current HEAD after the latest code changes. <!-- If substantial AI assistance = `yes`, paste the completed checklist and disclosure block here, including the final ai_review summary and screenshot evidence or equivalent persisted links from both fresh reviewers described in AI_POLICY.md, the Fory-guided reviewer and the independent general reviewer, on the current PR diff or current HEAD after the latest code changes. --> ## Does this PR introduce any user-facing change? <!-- If any user-facing interface changes, please [open an issue](https://github.com/apache/fory/issues/new/choose) describing the need to do so and update the document if necessary. Delete section if not applicable. --> - [ ] Does this PR introduce any public API change? - [ ] Does this PR introduce any binary protocol compatibility change? ## Benchmark <!-- When the PR has an impact on performance (if you don't know whether the PR will have an impact on performance, you can submit the PR first, and if it will have impact on performance, the code reviewer will explain it), be sure to attach a benchmark data here. Delete section if not applicable. --> -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
