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Merge pull request #3824 from elasota/specify-zero-offset

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Specify offset 0 as invalid and specify required fixup behavior
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Yann Collet
2024-03-08 15:25:48 -08:00
committed by GitHub
parent 478e5fedf9 f06b18b3ff
commit e127139ceb
2 changed files with 18 additions and 1 deletions
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doc/zstd_compression_format.md
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@@ -929,7 +929,10 @@ There is an exception though, when current sequence's `literals_length = 0`.
In this case, repeated offsets are shifted by one,
so an `offset_value` of 1 means `Repeated_Offset2`,
an `offset_value` of 2 means `Repeated_Offset3`,
and an `offset_value` of 3 means `Repeated_Offset1 - 1_byte`.
and an `offset_value` of 3 means `Repeated_Offset1 - 1`.
In the final case, if `Repeated_Offset1 - 1` evaluates to 0, then the
data is considered corrupted.
For the first block, the starting offset history is populated with following values :
`Repeated_Offset1`=1, `Repeated_Offset2`=4, `Repeated_Offset3`=8,