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* Merge pull request #793 from nigeltao/devYann Collet2019-09-211-2/+6
|\ | | | | Have read_variable_length use fixed size types
| * Have read_variable_length use fixed size typesNigel Tao2019-09-211-2/+6
| | | | | | | | | | | | | | | | | | | | Otherwise, the output from decoding LZ4-compressed input could be platform dependent. Also add a compile-time check to confirm the existing code's assumptions that, if <stdint.h> isn't used, then sizeof(int) == 4. Updates #792
* | Merge pull request #790 from ↵Yann Collet2019-09-1810-69/+85
|\ \ | |/ |/| | | | | bimbashrestha/seperating_seed_generation_and_use_in_fuzzers Separating the seed generation and use in FUZZ_dataProducer api
| * Retreiving 32 bits from the end for fuzzerBimba Shrestha2019-09-1410-50/+36
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| * Addressing naming nits and moving size modification up in all fuzzersBimba Shrestha2019-09-1310-68/+63
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| * Seperating the seed generation and useBimba Shrestha2019-09-1310-33/+68
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* | Merge pull request #770 from neheb/devYann Collet2019-09-102-6/+20
|\ \ | | | | | | util.h: Remove deprecated utime for non-Windows
| * | util.h: Remove deprecated utime for non-WindowsRosen Penev2019-09-102-6/+20
|/ / | | | | | | utime was deprecated in POSIX 2008.
* | Merge pull request #785 from ↵Yann Collet2019-09-095-7/+56
|\ \ | |/ | | | | | | bimbashrestha/transfer_remaining_fuzzers_to_consume_from_end_of_input Making fuzzers use dataProducer api instead of random seed for decisions
| * Making fuzzers use dataProducer api instead of random seed for decisionsBimba Shrestha2019-08-305-7/+56
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* | fixed #778Yann Collet2019-08-211-2/+2
| | | | | | | | fixed assert() when divisor == 0
* | Merge pull request #779 from bimbashrestha/devYann Collet2019-08-208-15/+111
|\ \ | |/ | | Adding fuzz data producer for uint32 and using in decompress_fuzzer
| * Adding comments, fixing nit, and hiding the struct in data producer apibimbashrestha2019-08-178-11/+25
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| * Seperating fuzz data producer api impl and header, using data producer on ↵bimbashrestha2019-08-169-42/+78
| | | | | | | | the easy fuzzers
| * Created a data producer API and used in decompress_fuzzerbimbashrestha2019-08-162-6/+26
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| * Adding fuzz data producer for uint32 and using in decompress_fuzzerbimbashrestha2019-08-162-3/+29
|/ | | | | | | | | | | | | | Summary: Consuming bytes from the end of data instead of from the front to prevent "all-in-one" decisions. Test Plan: Reviewers: Subscribers: Tasks: Tags:
* fixed test errorv1.9.2Yann Collet2019-08-151-1/+1
| | | | | could trigger %0 on exceptional circumstances due to wrong buffer size parameter.
* Merge pull request #777 from terrelln/off-by-oneYann Collet2019-08-101-1/+1
|\ | | | | [LZ4_compress_destSize] Fix off-by-one error
| * [LZ4_compress_destSize] Fix off-by-one errorNick Terrell2019-08-091-1/+1
|/ | | | | | | | | | PR#756 fixed the data corruption bug, but didn't clear `ip`. PR#760 fixed that off-by-one error, but missed the case where `ip == filledIp`, which is harder for the fuzzers to find (it took 20 days not 1 day). Verified this fixed the issue reported by OSS-Fuzz. Credit to OSS-Fuzz.
* Merge pull request #773 from felixhandte/attach-empty-dict-behavior-conformanceYann Collet2019-08-071-10/+21
|\ | | | | Make Attaching an Empty Dict Behave the Same as Using it Directly
| * Only Bump Offset When Attaching Non-Null DictionaryW. Felix Handte2019-08-061-15/+21
| | | | | | | | | | We do want to bump, even if the dictionary is empty, but we **don't** want to bump if the dictionary is null.
| * Add Attach Dict Debug LogW. Felix Handte2019-08-061-0/+4
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| * Make Attaching an Empty Dict Behave the Same as Using it DirectlyW. Felix Handte2019-08-061-14/+15
|/ | | | | | | | | | | | | | | | | | | When using an empty dictionary, we bail out of loading or attaching it in ways that leave the working context in potentially slightly different states. In particular, in some paths, we will cause the currentOffset to be non-zero, while in others we would allow it to remain 0. This difference in behavior is perfectly harmless, but in some situations, it can produce slight differences in the compressed output. For sanity's sake, we currently try to maintain a strict correspondence between the behavior of the dict attachment and the dict loading paths. This patch restores them to behaving identically. This shouldn't have any negative side-effects, as far as I can tell. When writing the dict attachment code, I tried to preserve zeroed currentOffsets when possible, since they benchmarked as very slightly faster. However, the case of attaching an empty dictionary is probably rare enought that it's acceptable to minisculely degrade performance in that corner case.
* Merge pull request #772 from lz4/offset0Yann Collet2019-08-062-64/+66
|\ | | | | silence msan warning when offset==0
| * silence msan warning when offset==0Yann Collet2019-08-062-64/+66
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* | Merge pull request #771 from terrelln/rep-ext-fixYann Collet2019-08-011-26/+65
|\ \ | |/ |/| [lz4hc] Further improve pattern detection and chain swapping
| * [lz4hc] Chain swap with accelerationNick Terrell2019-07-311-4/+10
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| * [lz4hc] Only allow chain swapping forwardsNick Terrell2019-07-311-1/+1
| | | | | | | | | | | | When the match is very long and found quickly, we can do matchLength * nbCompares iterations through the chain swapping, which can really slow down compression.
| * [lz4hc] Fix pattern detection end of dictionaryNick Terrell2019-07-311-20/+45
| | | | | | | | | | | | The pattern detection in extDict mode could put `matchIndex` within the last 3 bytes of the dictionary. This would cause a read out of bounds.
| * [lz4hc] Fix minor pessimization in extDict pattern matchingNick Terrell2019-07-311-1/+1
| | | | | | | | | | | | We should be comparing `matchPtr` not `ip`. This bug just means that this branch was not taken, so we might miss some of the forward length.
| * [lz4hc] Improve pattern detection in ext dictNick Terrell2019-07-311-5/+13
|/ | | | | | | | | | | | It is important to continue to look backwards if the current pattern reaches `lowPrefixPtr`. If the pattern detection doesn't go all the way to the beginning of the pattern, or the end of the pattern it slows down the search instead of speeding it up. The slow unit in `round_trip_stream_fuzzer` used to take 12 seconds to run with -O3, now it takes 0.2 seconds. Credit to OSS-Fuzz
* Merge pull request #768 from terrelln/rep-extYann Collet2019-07-241-27/+47
|\ | | | | [LZ4HC] Speed up pattern compression with external dictionary
| * [LZ4HC] Speed up pattern compression with external dictionaryNick Terrell2019-07-241-27/+47
|/ | | | Fixes #761.
* Merge pull request #766 from Low-power/cli-option---bestYann Collet2019-07-233-0/+11
|\ | | | | Add option '--best' to lz4(1)
| * lz4cli: add option '--best' as an alias of '-12'WHR2019-07-233-0/+11
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* Merge pull request #763 from terrelln/unusedYann Collet2019-07-191-0/+9
|\ | | | | [lz4frame] Fix unused variable warnings in fuzzing mode
| * [lz4frame] Fix unused variable warnings in fuzzing modeNick Terrell2019-07-191-0/+9
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* | Merge pull request #760 from terrelln/destSizeYann Collet2019-07-191-1/+1
|\ \ | |/ |/| [LZ4_compress_destSize] Fix off-by-one error in fix
| * [LZ4_compress_destSize] Fix off-by-one error in fixNick Terrell2019-07-181-1/+1
| | | | | | | | | | | | | | The next match is looking at the current ip, not the next ip, so it needs to be cleared as well. Credit to OSS-Fuzz
* | Merge pull request #758 from dooxe/developYann Collet2019-07-191-0/+1
|\ \ | | | | | | Added `BUNDLE DESTINATION`
| * | Added BUNDLE DESTINATION in CMakeLists.txt so that it works with newer ↵dooxe2019-07-181-0/+1
| | | | | | | | | | | | versions of cmake
| * | Merge pull request #692 from lz4/devv1.9.1Yann Collet2019-04-2329-464/+825
| |\ \ | | | | | | | | v1.9.1
* | \ \ Merge pull request #762 from terrelln/frame-fuzzYann Collet2019-07-1915-11/+652
|\ \ \ \ | |_|_|/ |/| | | [fuzz] Add LZ4 frame fuzzers
| * | | [fuzz] Add LZ4 frame fuzzersNick Terrell2019-07-196-3/+219
| | | | | | | | | | | | | | | | | | | | | | | | * Round trip fuzzer * Compress fuzzer * Decompress fuzzer
| * | | [lz4frame] Skip magic and checksums in fuzzing modeNick Terrell2019-07-191-0/+12
| | | | | | | | | | | | | | | | | | | | When `FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION` is defined we skip magic and checksum checks. This makes it easier to fuzz decompression.
| * | | Fix LZ4_attach_dictionary with empty dictionaryNick Terrell2019-07-181-1/+1
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| * | | [fuzz] Add HC fuzzers for round trip, compress, and streamingNick Terrell2019-07-185-14/+202
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| * | | [fuzzer] Update scripts for new fuzzersNick Terrell2019-07-183-6/+11
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| * | | [fuzz] Add a streaming round trip fuzzerNick Terrell2019-07-181-0/+217
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| * | | Unconditionally Clear `dictCtx`W. Felix Handte2019-07-181-5/+3
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