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changed parameter name to ZSTD_c_overlapLog

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from overlapSizeLog.

Reasoning :
`overlapLog` is already used everwhere, in the code, command line and documentation.
`ZSTD_c_overlapSizeLog` feels unnecessarily different.
This commit is contained in:
Yann Collet
2018-12-11 16:55:33 -08:00
parent 5e6aaa3abb
commit 9b784dec7f
6 changed files with 33 additions and 23 deletions
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lib/zstd.h
+11 -6
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@@ -602,15 +602,20 @@ typedef enum {
ZSTD_c_jobSize=401, /* Size of a compression job. This value is enforced only when nbWorkers >= 1.
* Each compression job is completed in parallel, so this value can indirectly impact the nb of active threads.
* 0 means default, which is dynamically determined based on compression parameters.
* Job size must be a minimum of overlapSize, or 1 MB, whichever is largest.
* Job size must be a minimum of overlap size, or 1 MB, whichever is largest.
* The minimum size is automatically and transparently enforced */
ZSTD_c_overlapSizeLog=402, /* Size of previous job reloaded at the beginning of each job, as a fraction of window size.
ZSTD_c_overlapLog=402, /* Control the overlap size, as a fraction of window size.
* The overlap size is an amount of data reloaded from previous job at the beginning of a new job.
* It helps preserve compression ratio, while each job is compressed in parallel.
* This value is enforced only when nbWorkers >= 1.
* Larger values increase compression ratio, but decrease speed.
* Values range from 0 (no overlap) to 9 (overlap a full windowSize).
* Each rank (except 0) increase/decrease load size by a factor 2
* 9: full window; 8: w/2; 7: w/4; 6: w/8; 5:w/16; 4: w/32; 3:w/64; 2:w/128; 1:w/256;
* default value is 6 : use 1/8th of windowSize */
* Values range from 0 to 9 (overlap a full windowSize).
* - 0 means "auto" : value will be determined by the library, depending on strategy
* - 1 means "no overlap"
* - 9 means "full overlap", using a full window size.
* Each intermediate rank increases/decreases load size by a factor 2 :
* 9: full window; 8: w/2; 7: w/4; 6: w/8; 5:w/16; 4: w/32; 3:w/64; 2:w/128; 1:no overlap; 0:auto
* default value varies between 6 and 9, depending on strategy */
/* note : additional experimental parameters are also available
* within the experimental section of the API.