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@senhuang42
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ZSTD_writeSkippableFrame(void* dst, size_t dstCapacity, const void* src, size_t srcSize, U32 magicVariant)

Writes a skippable frame into dst buffer, using src content, and using one of the 16 available skippable frame magic numbers, controllable with magicVariant. More detailed documentation in zstd.h.

Test Plan:

  • Modify existing unit test to ensure roundtrip-ability

@terrelln
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This looks good to me. Is there a particular use case that motivates adding this to the API?

@senhuang42
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Was mentioned in #2275 that this might be a nice thing to have.

@Cyan4973
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U32 magicVariant

In the future, if we ever come to settle on a few skippable frame IDs implying something meaningful, we could use an enum instead. Or in complementarity, as I think this is compatible with U32, so it should be fine.

Speaking of "meaningful" skippable frame IDs, maybe we could consider those from pzstd, and maybe the seekable format.

@Cyan4973 Cyan4973 merged commit cfff4c1 into facebook:dev Dec 28, 2020
Cyan4973 added a commit that referenced this pull request Dec 28, 2020
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4 participants