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aiongg
2eca9b3a53
hayro-postscript 0.1.0 is the token scanner hayro-cmap uses for the CMap streams PDFs embed. Its object reader skipped each `<<` or `>>` by calling itself again, so a stream holding a long run of `<` or `>` bytes recursed once per pair and aborted the process with a stack overflow. Vendor the crates.io package unchanged and patch `object::read` to skip those runs in a loop, returning the same next object as before. Wire it in like the other Hayro crates: workspace exclude, [patch.crates-io] entry, SOURCE.json with registry and local hashes, the backend test script, NOTICE, ATTRIBUTION.md and the reader README. Tests cover a million `<` and a million `>` bytes, `<< /A 1 >>` and nested `<<<< /X >>>>` runs.
31 lines
1.1 KiB
Markdown
31 lines
1.1 KiB
Markdown
# hayro-postscript
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[](https://crates.io/crates/hayro-postscript)
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[](https://docs.rs/hayro-postscript)
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<!-- cargo-rdme start -->
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A lightweight PostScript scanner.
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This crate provides a scanner for tokenizing PostScript programs into typed objects.
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It currently only implements a very small subset of the PostScript language,
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with the main goal of being enough to parse CMAP files, but the scope _might_
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be expanded upon in the future.
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The supported types include integers and real numbers, name objects, strings and arrays.
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Unsupported is anything else, including dictionaries, procedures, etc. An error
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will be returned in case any of these is encountered.
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### Safety
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This crate forbids unsafe code via a crate-level attribute.
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<!-- cargo-rdme end -->
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## License
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Licensed under either of
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- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or <http://www.apache.org/licenses/LICENSE-2.0>)
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- MIT license ([LICENSE-MIT](LICENSE-MIT) or <http://opensource.org/licenses/MIT>)
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at your option.
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