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905 Commits

Author SHA1 Message Date
W. Felix Handte
7a25f7ef5b Existing Repcode Check Only Applies to noDict Case 2018-05-25 13:13:28 -04:00
W. Felix Handte
8b241da4df Properly Initialize Repcode Values 2018-05-25 13:13:28 -04:00
W. Felix Handte
7097a03749 Add Necessary Dict Variables 2018-05-25 13:13:28 -04:00
W. Felix Handte
aacbbf4f9a Rename 'lowest' to 'localLowest' to Prepare to Introduce Dict Indices 2018-05-25 13:13:28 -04:00
W. Felix Handte
c10d1b4011 Skeleton for In-Place Impl for ZSTD_dfast 2018-05-25 13:13:28 -04:00
Yann Collet
b5ef32fea7 Merge branch 'dev' into fracFse 2018-05-24 14:09:49 -07:00
Yann Collet
776128d16f fix corner case when requiring cost of an FSE symbol 
ensure that, when frequency[symbol]==0,
result is (tableLog + 1) bits
with both upper-bit and fractional-bit estimates.

Also : enable BIT_DEBUG in /tests
 2018-05-24 13:59:11 -07:00
Yann Collet
08c5be5db3
Merge pull request #1117 from felixhandte/zstd-fast-in-place-dict 
ZSTD_fast: Support Searching the Dictionary Context In-Place
 2018-05-23 19:32:25 -07:00
Nick Terrell
06b70179da
Work around bug in zstd decoder (#1147) 
Work around bug in zstd decoder

Pull request #1144 exercised a new path in the zstd decoder that proved to
be buggy. Avoid the extremely rare bug by emitting an uncompressed block.
 2018-05-23 18:02:30 -07:00
W. Felix Handte
d9c7e67125 Assert that Dict and Current Window are Adjacent in Index Space 2018-05-23 17:53:03 -04:00
W. Felix Handte
298d24fa57 Make loadedDictEnd an Index, not the Dict Len 2018-05-23 17:53:03 -04:00
W. Felix Handte
7ef85e0618 Fixes in re Comments 2018-05-23 17:53:03 -04:00
W. Felix Handte
582b7f85ed Don't Attach Empty Dict Contents 
In weird corner cases, they produce unexpected results...
 2018-05-23 17:53:03 -04:00
W. Felix Handte
9c92223468 Avoid Undefined Behavior in Match Ptr Calculation 2018-05-23 17:53:03 -04:00
W. Felix Handte
a44ab3b475 Remove Out-of-Date Comment 2018-05-23 17:53:03 -04:00
W. Felix Handte
95bdf20a87 Moar Renames 2018-05-23 17:53:03 -04:00
W. Felix Handte
7e0402e738 Also Attach Dict When Source Size is Unknown 2018-05-23 17:53:03 -04:00
W. Felix Handte
3ba70cc759 Clear the Dictionary When Sliding the Window 2018-05-23 17:53:03 -04:00
W. Felix Handte
b05ae9b608 Refine ip Initialization to Avoid ARM Weirdness 2018-05-23 17:53:03 -04:00
W. Felix Handte
1a7b34ef28 Use New Index Invariant to Simplify Conditionals 2018-05-23 17:53:03 -04:00
W. Felix Handte
2d598e6fed Force Working Context Indices Greater than Dict Indices 2018-05-23 17:53:03 -04:00
W. Felix Handte
d005e5daf4 Whitespace Fix 2018-05-23 17:53:03 -04:00
W. Felix Handte
154eb09419 Switch to Original Match Calc for noDict Repcode Check 2018-05-23 17:53:03 -04:00
W. Felix Handte
191fc74a51 Rename 'hasDict' to 'dictMode' 2018-05-23 17:53:03 -04:00
W. Felix Handte
ae4fcf7816 Respond to PR Comments; Formatting/Style/Lint Fixes 2018-05-23 17:53:03 -04:00
W. Felix Handte
ca26cecc7a Rename and Reformat 2018-05-23 17:53:03 -04:00
W. Felix Handte
66bc1ca641 Change Cut-Off to 8 KB 2018-05-23 17:53:03 -04:00
W. Felix Handte
c31ee3c7f8 Fix Rep Code Initialization 2018-05-23 17:53:03 -04:00
W. Felix Handte
b67196f30d Coalesce hasDictMatchState and extDict Checks into One Enum and Rename Stuff 2018-05-23 17:53:03 -04:00
W. Felix Handte
265c2869d1 Split Wrapper Functions to Cause Inlining 2018-05-23 17:53:03 -04:00
W. Felix Handte
6929964d65 Add bounds check in repcode tests 2018-05-23 17:53:03 -04:00
W. Felix Handte
70a537d1d7 Initial Repcode Check Support for Ext Dict Ctx 2018-05-23 17:53:03 -04:00
W. Felix Handte
8d24ff0353 Preliminary Support in ZSTD_compressBlock_fast_generic() for Ext Dict Ctx 2018-05-23 17:53:03 -04:00
W. Felix Handte
d18a405779 Refer to the Dictionary Match State In-Place (Sometimes) 2018-05-23 17:53:03 -04:00
Nick Terrell
e3959d5eba Fixes 2018-05-22 16:06:33 -07:00
Nick Terrell
49cf880513 Approximate FSE encoding costs for selection 
Estimate the cost for using FSE modes `set_basic`, `set_compressed`, and
`set_repeat`, and select the one with the lowest cost.

* The cost of `set_basic` is computed using the cross-entropy cost
  function `ZSTD_crossEntropyCost()`, using the normalized default count
  and the count.
* The cost of `set_repeat` is computed using `FSE_bitCost()`. We check the
  previous table to see if it is able to represent the distribution.
* The cost of `set_compressed` is computed with the entropy cost function
  `ZSTD_entropyCost()`, together with the cost of writing the normalized
  count `ZSTD_NCountCost()`.
 2018-05-22 14:33:22 -07:00
Yann Collet
5381369cb1 Merge branch 'dev' into tableLevels 2018-05-18 18:23:27 -07:00
Yann Collet
b0b3fb517d updated compression levels for blocks of 256KB 2018-05-18 17:17:12 -07:00
Yann Collet
63eeeaa1dd update table levels for blocks <= 16K 
also : allow hlog to be slighly larger than windowlog,
as it's apparently good for both speed and compression ratio.
 2018-05-16 16:13:37 -07:00
Nick Terrell
30d9c84b1a Fix failing Travis tests 2018-05-15 09:46:20 -07:00
Yann Collet
f372ffc64d
Merge pull request #1127 from facebook/staticDictCost 
Improved optimal parser with dictionary
 2018-05-14 17:45:50 -07:00
Yann Collet
c9227ee16b update table for 128 KB blocks 2018-05-13 17:15:07 -07:00
Yann Collet
b4250489cf update compression levels for large inputs 2018-05-13 01:53:38 -07:00
Yann Collet
761758982e replaced FSE_count by FSE_count_simple 
to reduce usage of stack memory.

Also : tweaked a few comments, as suggested by @terrelln
 2018-05-11 16:03:37 -07:00
Yann Collet
99ddca43a6 fixed wrong assertion 
base can actually overflow
 2018-05-10 19:48:09 -07:00
Yann Collet
09d0fa29ee minor adjusting of weights 2018-05-10 18:13:48 -07:00
Yann Collet
1a26ec6e8d opt: init statistics from dictionary 
instead of starting from fake "default" statistics.
 2018-05-10 17:59:12 -07:00
Yann Collet
74b1c75d64 btopt : minor adjustment of update frequencies 2018-05-10 16:32:36 -07:00
Yann Collet
ac6105463a opt: minor improvements to log traces 
slight improvement when using fractional-bit evaluation (opt:dictionay)
 2018-05-09 15:46:11 -07:00
Yann Collet
c39061cb7b fixed declaration-after-statement warning 2018-05-09 12:07:25 -07:00