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Merge pull request #2366 from senhuang42/enable_ldm_by_default

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Enable LDM by default if window size >= 128MB and strategy uses opt parser
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sen
2020-10-27 14:59:28 -04:00
committed by GitHub
parent 0953645837 8bdb32aebe
commit 17b700d78a
3 changed files with 46 additions and 1 deletions
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20
tests/fuzzer.c
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@ -1158,6 +1158,26 @@ static int basicUnitTests(U32 const seed, double compressibility)
}
DISPLAYLEVEL(3, "OK \n");
DISPLAYLEVEL(3, "test%3d : ldm conditionally enabled by default doesn't change cctx params: ", testNb++);
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_outBuffer out = {NULL, 0, 0};
ZSTD_inBuffer in = {NULL, 0, 0};
int value;
/* Even if LDM will be enabled by default in the applied params (since wlog >= 27 and strategy >= btopt),
* we should not modify the actual parameter specified by the user within the CCtx
*/
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_windowLog, 27));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_strategy, ZSTD_btopt));
CHECK_Z(ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_continue));
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_enableLongDistanceMatching, &value));
CHECK_EQ(value, 0);
ZSTD_freeCCtx(cctx);
}
DISPLAYLEVEL(3, "OK \n");
/* this test is really too long, and should be made faster */
DISPLAYLEVEL(3, "test%3d : overflow protection with large windowLog : ", testNb++);
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();