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added test of new parameter ZSTD_p_forceWindow

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This commit is contained in:
Yann Collet 2017-01-25 16:39:03 -08:00
parent bb0027405a
commit 06e7697f96
4 changed files with 10 additions and 6 deletions
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6
lib/compress/zstd_compress.c
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@ -123,7 +123,7 @@ size_t ZSTD_setCCtxParameter(ZSTD_CCtx* cctx, ZSTD_CCtxParameter param, unsigned
{
switch(param)
{
case ZSTD_p_forceWindow : cctx->forceWindow = value; return 0;
case ZSTD_p_forceWindow : cctx->forceWindow = value>0; cctx->loadedDictEnd = 0; return 0;
default: return ERROR(parameter_unknown);
}
}
@ -2323,7 +2323,7 @@ static size_t ZSTD_compress_generic (ZSTD_CCtx* cctx,
else cctx->nextToUpdate -= correction;
}
if ((U32)(ip+blockSize - cctx->base) > (cctx->forceWindow ? 0 : cctx->loadedDictEnd) + maxDist) {
if ((U32)(ip+blockSize - cctx->base) > cctx->loadedDictEnd + maxDist) {
/* enforce maxDist */
U32 const newLowLimit = (U32)(ip+blockSize - cctx->base) - maxDist;
if (cctx->lowLimit < newLowLimit) cctx->lowLimit = newLowLimit;
@ -2477,7 +2477,7 @@ static size_t ZSTD_loadDictionaryContent(ZSTD_CCtx* zc, const void* src, size_t
zc->dictBase = zc->base;
zc->base += ip - zc->nextSrc;
zc->nextToUpdate = zc->dictLimit;
zc->loadedDictEnd = (U32)(iend - zc->base);
zc->loadedDictEnd = zc->forceWindow ? 0 : (U32)(iend - zc->base);
zc->nextSrc = iend;
if (srcSize <= HASH_READ_SIZE) return 0;

5
lib/compress/zstdmt_compress.h
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@ -51,8 +51,9 @@ ZSTDLIB_API size_t ZSTDMT_initCStream_advanced(ZSTDMT_CCtx* mtctx, const void* d
/* ZSDTMT_parameter :
* List of parameters that can be set using ZSTDMT_setMTCtxParameter() */
typedef enum { ZSTDMT_p_sectionSize /* size of input "section". Each section is compressed in parallel. 0 means default, which is dynamically determined within compression functions */
} ZSDTMT_parameter;
typedef enum {
ZSTDMT_p_sectionSize /* size of input "section". Each section is compressed in parallel. 0 means default, which is dynamically determined within compression functions */
} ZSDTMT_parameter;
/* ZSTDMT_setMTCtxParameter() :
* allow setting individual parameters, one at a time, among a list of enums defined in ZSTDMT_parameter.

4
lib/zstd.h
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@ -404,7 +404,9 @@ ZSTDLIB_API size_t ZSTD_sizeof_CCtx(const ZSTD_CCtx* cctx);
/*! ZSTD_setCCtxParameter() :
* Set advanced parameters, selected through enum ZSTD_CCtxParameter
* @result : 0, or an error code (which can be tested with ZSTD_isError()) */
typedef enum { ZSTD_p_forceWindow } ZSTD_CCtxParameter;
typedef enum {
ZSTD_p_forceWindow /* Force back-references to remain < windowSize, even when referencing Dictionary content (default:0)*/
} ZSTD_CCtxParameter;
size_t ZSTD_setCCtxParameter(ZSTD_CCtx* cctx, ZSTD_CCtxParameter param, unsigned value);
/*! ZSTD_createCDict_byReference() :

1
tests/fuzzer.c
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@ -755,6 +755,7 @@ static int fuzzerTests(U32 seed, U32 nbTests, unsigned startTest, U32 const maxD
CHECK (ZSTD_isError(errorCode), "ZSTD_copyCCtx error : %s", ZSTD_getErrorName(errorCode));
} }
XXH64_reset(&xxhState, 0);
ZSTD_setCCtxParameter(ctx, ZSTD_p_forceWindow, FUZ_rand(&lseed) & 1);
{ U32 const nbChunks = (FUZ_rand(&lseed) & 127) + 2;
U32 n;
for (totalTestSize=0, cSize=0, n=0 ; n<nbChunks ; n++) {