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Localize 'dictMode' from cctx to function param

dev
Stella Lau 2017-08-29 15:10:42 -07:00
parent c88fb9267f
commit c7a18b7c21
4 changed files with 69 additions and 72 deletions
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4
lib/common/zstd_internal.h
View File

@ -293,9 +293,6 @@ struct ZSTD_CCtx_params_s {
int compressionLevel;
U32 forceWindow; /* force back-references to respect limit of
* 1<<wLog, even for dictionary */
/* Dictionary */
ZSTD_dictMode_e dictMode; /* select restricting dictionary to "rawContent"
* or "fullDict" only */
/* Multithreading: used to pass parameters to mtctx */
U32 nbThreads;
@ -376,6 +373,7 @@ ZSTD_compressionParameters ZSTD_getCParamsFromCDict(const ZSTD_CDict* cdict);
/* INTERNAL */
size_t ZSTD_compressBegin_advanced_internal(ZSTD_CCtx* cctx,
const void* dict, size_t dictSize,
ZSTD_dictMode_e dictMode,
ZSTD_CCtx_params params,
unsigned long long pledgedSrcSize);

102
lib/compress/zstd_compress.c
View File

@ -70,6 +70,12 @@ struct ZSTD_CDict_s {
ZSTD_CCtx* refContext;
}; /* typedef'd to ZSTD_CDict within "zstd.h" */
typedef struct ZSTD_prefixDict_s {
const void* dict;
size_t dictSize;
ZSTD_dictMode_e dictMode;
} ZSTD_prefixDict;
struct ZSTD_CCtx_s {
const BYTE* nextSrc; /* next block here to continue on current prefix */
const BYTE* base; /* All regular indexes relative to this position */
@ -116,8 +122,7 @@ struct ZSTD_CCtx_s {
/* Dictionary */
ZSTD_CDict* cdictLocal;
const ZSTD_CDict* cdict;
const void* prefix;
size_t prefixSize;
ZSTD_prefixDict prefixDict;
/* Multi-threading */
ZSTDMT_CCtx* mtctx;
@ -328,10 +333,6 @@ size_t ZSTD_CCtx_setParameter(ZSTD_CCtx* cctx, ZSTD_cParameter param, unsigned v
case ZSTD_p_dictIDFlag:
return ZSTD_CCtxParam_setParameter(&cctx->requestedParams, param, value);
case ZSTD_p_dictMode:
if (cctx->cdict) return ERROR(stage_wrong); /* must be set before loading */
return ZSTD_CCtxParam_setParameter(&cctx->requestedParams, param, value);
case ZSTD_p_forceMaxWindow : /* Force back-references to remain < windowSize,
* even when referencing into Dictionary content
* default : 0 when using a CDict, 1 when using a Prefix */
@ -447,15 +448,6 @@ size_t ZSTD_CCtxParam_setParameter(
params->fParams.noDictIDFlag = (value == 0);
return 0;
case ZSTD_p_dictMode :
/* restrict dictionary mode to "rawContent" or "fullDict" only */
ZSTD_STATIC_ASSERT((U32)ZSTD_dm_fullDict > (U32)ZSTD_dm_rawContent);
if (value > (unsigned)ZSTD_dm_fullDict) {
return ERROR(parameter_outOfBound);
}
params->dictMode = (ZSTD_dictMode_e)value;
return 0;
case ZSTD_p_forceMaxWindow :
params->forceWindow = value > 0;
return 0;
@ -496,9 +488,6 @@ size_t ZSTD_CCtx_applyCCtxParams(ZSTD_CCtx* cctx, const ZSTD_CCtx_params* params
cctx->requestedParams.fParams = params->fParams;
cctx->requestedParams.compressionLevel = params->compressionLevel;
/* Assume dictionary parameters are validated */
cctx->requestedParams.dictMode = params->dictMode;
/* Set force window explicitly since it sets cctx->loadedDictEnd */
CHECK_F( ZSTD_CCtx_setParameter(
cctx, ZSTD_p_forceMaxWindow, params->forceWindow) );
@ -524,9 +513,9 @@ ZSTDLIB_API size_t ZSTD_CCtx_setPledgedSrcSize(ZSTD_CCtx* cctx, unsigned long lo
return 0;
}
size_t ZSTD_CCtx_loadDictionary_internal(
size_t ZSTD_CCtx_loadDictionary_advanced(
ZSTD_CCtx* cctx, const void* dict, size_t dictSize,
ZSTD_dictLoadMethod_e dictLoadMethod)
ZSTD_dictLoadMethod_e dictLoadMethod, ZSTD_dictMode_e dictMode)
{
if (cctx->streamStage != zcss_init) return ERROR(stage_wrong);
if (cctx->staticSize) return ERROR(memory_allocation); /* no malloc for static CCtx */
@ -541,7 +530,7 @@ size_t ZSTD_CCtx_loadDictionary_internal(
cctx->cdictLocal = ZSTD_createCDict_advanced(
dict, dictSize,
dictLoadMethod,
cctx->requestedParams.dictMode,
dictMode,
cParams, cctx->customMem);
cctx->cdict = cctx->cdictLocal;
if (cctx->cdictLocal == NULL)
@ -553,12 +542,14 @@ size_t ZSTD_CCtx_loadDictionary_internal(
ZSTDLIB_API size_t ZSTD_CCtx_loadDictionary_byReference(
ZSTD_CCtx* cctx, const void* dict, size_t dictSize)
{
return ZSTD_CCtx_loadDictionary_internal(cctx, dict, dictSize, ZSTD_dlm_byRef);
return ZSTD_CCtx_loadDictionary_advanced(
cctx, dict, dictSize, ZSTD_dlm_byRef, ZSTD_dm_auto);
}
ZSTDLIB_API size_t ZSTD_CCtx_loadDictionary(ZSTD_CCtx* cctx, const void* dict, size_t dictSize)
{
return ZSTD_CCtx_loadDictionary_internal(cctx, dict, dictSize, ZSTD_dlm_byCopy);
return ZSTD_CCtx_loadDictionary_advanced(
cctx, dict, dictSize, ZSTD_dlm_byCopy, ZSTD_dm_auto);
}
@ -566,20 +557,27 @@ size_t ZSTD_CCtx_refCDict(ZSTD_CCtx* cctx, const ZSTD_CDict* cdict)
{
if (cctx->streamStage != zcss_init) return ERROR(stage_wrong);
cctx->cdict = cdict;
cctx->prefix = NULL; /* exclusive */
cctx->prefixSize = 0;
memset(&cctx->prefixDict, 0, sizeof(ZSTD_prefixDict)); /* exclusive */
return 0;
}
size_t ZSTD_CCtx_refPrefix(ZSTD_CCtx* cctx, const void* prefix, size_t prefixSize)
{
return ZSTD_CCtx_refPrefix_advanced(cctx, prefix, prefixSize, ZSTD_dm_rawContent);
}
size_t ZSTD_CCtx_refPrefix_advanced(
ZSTD_CCtx* cctx, const void* prefix, size_t prefixSize, ZSTD_dictMode_e dictMode)
{
if (cctx->streamStage != zcss_init) return ERROR(stage_wrong);
cctx->cdict = NULL; /* prefix discards any prior cdict */
cctx->prefix = prefix;
cctx->prefixSize = prefixSize;
cctx->prefixDict.dict = prefix;
cctx->prefixDict.dictSize = prefixSize;
cctx->prefixDict.dictMode = dictMode;
return 0;
}
static void ZSTD_startNewCompression(ZSTD_CCtx* cctx)
{
cctx->streamStage = zcss_init;
@ -3387,13 +3385,14 @@ static size_t ZSTD_compress_insertDictionary(ZSTD_CCtx* cctx,
* @return : 0, or an error code */
static size_t ZSTD_compressBegin_internal(ZSTD_CCtx* cctx,
const void* dict, size_t dictSize,
ZSTD_dictMode_e dictMode,
const ZSTD_CDict* cdict,
ZSTD_CCtx_params params, U64 pledgedSrcSize,
ZSTD_buffered_policy_e zbuff)
{
DEBUGLOG(4, "ZSTD_compressBegin_internal");
DEBUGLOG(4, "dict ? %s", dict ? "dict" : (cdict ? "cdict" : "none"));
DEBUGLOG(4, "dictMode : %u", (U32)(params.dictMode));
DEBUGLOG(4, "dictMode : %u", (U32)dictMode);
/* params are supposed to be fully validated at this point */
assert(!ZSTD_isError(ZSTD_checkCParams(params.cParams)));
assert(!((dict) && (cdict))); /* either dict or cdict, not both */
@ -3406,18 +3405,19 @@ static size_t ZSTD_compressBegin_internal(ZSTD_CCtx* cctx,
CHECK_F( ZSTD_resetCCtx_internal(cctx, params, pledgedSrcSize,
ZSTDcrp_continue, zbuff) );
return ZSTD_compress_insertDictionary(cctx, dict, dictSize, params.dictMode);
return ZSTD_compress_insertDictionary(cctx, dict, dictSize, dictMode);
}
size_t ZSTD_compressBegin_advanced_internal(
ZSTD_CCtx* cctx,
const void* dict, size_t dictSize,
ZSTD_dictMode_e dictMode,
ZSTD_CCtx_params params,
unsigned long long pledgedSrcSize)
{
/* compression parameters verification and optimization */
CHECK_F( ZSTD_checkCParams(params.cParams) );
return ZSTD_compressBegin_internal(cctx, dict, dictSize, NULL,
return ZSTD_compressBegin_internal(cctx, dict, dictSize, dictMode, NULL,
params, pledgedSrcSize,
ZSTDb_not_buffered);
}
@ -3430,8 +3430,8 @@ size_t ZSTD_compressBegin_advanced(ZSTD_CCtx* cctx,
{
ZSTD_CCtx_params cctxParams =
ZSTD_assignParamsToCCtxParams(cctx->requestedParams, params);
cctxParams.dictMode = ZSTD_dm_auto;
return ZSTD_compressBegin_advanced_internal(cctx, dict, dictSize, cctxParams,
return ZSTD_compressBegin_advanced_internal(cctx, dict, dictSize, ZSTD_dm_auto,
cctxParams,
pledgedSrcSize);
}
@ -3440,8 +3440,7 @@ size_t ZSTD_compressBegin_usingDict(ZSTD_CCtx* cctx, const void* dict, size_t di
ZSTD_parameters const params = ZSTD_getParams(compressionLevel, 0, dictSize);
ZSTD_CCtx_params cctxParams =
ZSTD_assignParamsToCCtxParams(cctx->requestedParams, params);
cctxParams.dictMode = ZSTD_dm_auto;
return ZSTD_compressBegin_internal(cctx, dict, dictSize, NULL,
return ZSTD_compressBegin_internal(cctx, dict, dictSize, ZSTD_dm_auto, NULL,
cctxParams, 0, ZSTDb_not_buffered);
}
@ -3523,7 +3522,6 @@ static size_t ZSTD_compress_internal (ZSTD_CCtx* cctx,
{
ZSTD_CCtx_params cctxParams =
ZSTD_assignParamsToCCtxParams(cctx->requestedParams, params);
cctxParams.dictMode = ZSTD_dm_auto;
return ZSTD_compress_advanced_internal(cctx,
dst, dstCapacity,
src, srcSize,
@ -3549,7 +3547,7 @@ size_t ZSTD_compress_advanced_internal(
const void* dict,size_t dictSize,
ZSTD_CCtx_params params)
{
CHECK_F( ZSTD_compressBegin_internal(cctx, dict, dictSize, NULL,
CHECK_F( ZSTD_compressBegin_internal(cctx, dict, dictSize, ZSTD_dm_auto, NULL,
params, srcSize, ZSTDb_not_buffered) );
return ZSTD_compressEnd(cctx, dst, dstCapacity, src, srcSize);
}
@ -3633,9 +3631,8 @@ static size_t ZSTD_initCDict_internal(
ZSTD_CCtx_params cctxParams = cdict->refContext->requestedParams;
cctxParams.fParams = fParams;
cctxParams.cParams = cParams;
cctxParams.dictMode = dictMode;
CHECK_F( ZSTD_compressBegin_internal(cdict->refContext,
cdict->dictContent, dictSize,
cdict->dictContent, dictSize, dictMode,
NULL,
cctxParams, ZSTD_CONTENTSIZE_UNKNOWN,
ZSTDb_not_buffered) );
@ -3759,10 +3756,9 @@ size_t ZSTD_compressBegin_usingCDict_advanced(
{ ZSTD_CCtx_params params = cctx->requestedParams;
params.cParams = ZSTD_getCParamsFromCDict(cdict);
params.fParams = fParams;
params.dictMode = ZSTD_dm_auto;
DEBUGLOG(5, "ZSTD_compressBegin_usingCDict_advanced");
return ZSTD_compressBegin_internal(cctx,
NULL, 0,
NULL, 0, ZSTD_dm_auto,
cdict,
params, pledgedSrcSize,
ZSTDb_not_buffered);
@ -3841,7 +3837,7 @@ size_t ZSTD_CStreamOutSize(void)
static size_t ZSTD_resetCStream_internal(
ZSTD_CStream* zcs,
const void* dict, size_t dictSize,
const void* dict, size_t dictSize, ZSTD_dictMode_e dictMode,
const ZSTD_CDict* cdict,
const ZSTD_CCtx_params params, unsigned long long pledgedSrcSize)
{
@ -3851,7 +3847,7 @@ static size_t ZSTD_resetCStream_internal(
assert(!((dict) && (cdict))); /* either dict or cdict, not both */
CHECK_F( ZSTD_compressBegin_internal(zcs,
dict, dictSize,
dict, dictSize, dictMode,
cdict,
params, pledgedSrcSize,
ZSTDb_buffered) );
@ -3871,7 +3867,7 @@ size_t ZSTD_resetCStream(ZSTD_CStream* zcs, unsigned long long pledgedSrcSize)
params.fParams.contentSizeFlag = (pledgedSrcSize > 0);
params.cParams = ZSTD_getCParamsFromCCtxParams(params, pledgedSrcSize, 0);
DEBUGLOG(5, "ZSTD_resetCStream");
return ZSTD_resetCStream_internal(zcs, NULL, 0, zcs->cdict, params, pledgedSrcSize);
return ZSTD_resetCStream_internal(zcs, NULL, 0, ZSTD_dm_auto, zcs->cdict, params, pledgedSrcSize);
}
/*! ZSTD_initCStream_internal() :
@ -3895,7 +3891,7 @@ size_t ZSTD_initCStream_internal(ZSTD_CStream* zcs,
ZSTD_freeCDict(zcs->cdictLocal);
zcs->cdictLocal = ZSTD_createCDict_advanced(
dict, dictSize,
ZSTD_dlm_byCopy, params.dictMode,
ZSTD_dlm_byCopy, ZSTD_dm_auto,
params.cParams, zcs->customMem);
zcs->cdict = zcs->cdictLocal;
if (zcs->cdictLocal == NULL) return ERROR(memory_allocation);
@ -3911,7 +3907,7 @@ size_t ZSTD_initCStream_internal(ZSTD_CStream* zcs,
params.compressionLevel = ZSTD_CLEVEL_CUSTOM;
zcs->requestedParams = params;
return ZSTD_resetCStream_internal(zcs, NULL, 0, zcs->cdict, params, pledgedSrcSize);
return ZSTD_resetCStream_internal(zcs, NULL, 0, ZSTD_dm_auto, zcs->cdict, params, pledgedSrcSize);
}
/* ZSTD_initCStream_usingCDict_advanced() :
@ -4157,23 +4153,27 @@ size_t ZSTD_compress_generic (ZSTD_CCtx* cctx,
/* transparent initialization stage */
if (cctx->streamStage == zcss_init) {
const void* const prefix = cctx->prefix;
size_t const prefixSize = cctx->prefixSize;
ZSTD_prefixDict const prefixDict = cctx->prefixDict;
ZSTD_CCtx_params params = cctx->requestedParams;
params.cParams = ZSTD_getCParamsFromCCtxParams(
cctx->requestedParams, cctx->pledgedSrcSizePlusOne-1, 0 /*dictSize*/);
cctx->prefix = NULL; cctx->prefixSize = 0; /* single usage */
assert(prefix==NULL || cctx->cdict==NULL); /* only one can be set */
memset(&cctx->prefixDict, 0, sizeof(ZSTD_prefixDict)); /* single usage */
assert(prefixDict.dict==NULL || cctx->cdict==NULL); /* only one can be set */
#ifdef ZSTD_MULTITHREAD
if (params.nbThreads > 1) {
DEBUGLOG(4, "call ZSTDMT_initCStream_internal as nbThreads=%u", params.nbThreads);
CHECK_F( ZSTDMT_initCStream_internal(cctx->mtctx, prefix, prefixSize, cctx->cdict, params, cctx->pledgedSrcSizePlusOne-1) );
CHECK_F( ZSTDMT_initCStream_internal(
cctx->mtctx, prefixDict.dict, prefixDict.dictSize,
cctx->cdict, params, cctx->pledgedSrcSizePlusOne-1) );
cctx->streamStage = zcss_load;
} else
#endif
{
CHECK_F( ZSTD_resetCStream_internal(cctx, prefix, prefixSize, cctx->cdict, params, cctx->pledgedSrcSizePlusOne-1) );
CHECK_F( ZSTD_resetCStream_internal(
cctx, prefixDict.dict, prefixDict.dictSize,
prefixDict.dictMode, cctx->cdict, params,
cctx->pledgedSrcSizePlusOne-1) );
} }
/* compression stage */

10
lib/compress/zstdmt_compress.c
View File

@ -343,13 +343,13 @@ void ZSTDMT_compressChunk(void* jobDescription)
if (!job->firstChunk) job->params.fParams.contentSizeFlag = 0; /* ensure no srcSize control */
{ ZSTD_CCtx_params jobParams = job->params;
/* Force loading dictionary in "content-only" mode (no header analysis) */
size_t const dictModeError =
ZSTD_CCtxParam_setParameter(&jobParams, ZSTD_p_dictMode, (U32)ZSTD_dm_rawContent);
size_t const forceWindowError =
ZSTD_CCtxParam_setParameter(&jobParams, ZSTD_p_forceMaxWindow, !job->firstChunk);
size_t const initError = ZSTD_compressBegin_advanced_internal(cctx, job->srcStart, job->dictSize, jobParams, job->fullFrameSize);
if (ZSTD_isError(initError) || ZSTD_isError(dictModeError) ||
ZSTD_isError(forceWindowError)) { job->cSize = initError; goto _endJob; }
size_t const initError = ZSTD_compressBegin_advanced_internal(cctx, job->srcStart, job->dictSize, ZSTD_dm_rawContent, jobParams, job->fullFrameSize);
if (ZSTD_isError(initError) || ZSTD_isError(forceWindowError)) {
job->cSize = initError;
goto _endJob;
}
} }
if (!job->firstChunk) { /* flush and overwrite frame header when it's not first segment */
size_t const hSize = ZSTD_compressContinue(cctx, dstBuff.start, dstBuff.size, src, 0);

23
lib/zstd.h
View File

@ -963,10 +963,6 @@ typedef enum {
ZSTD_p_checksumFlag, /* A 32-bits checksum of content is written at end of frame (default:0) */
ZSTD_p_dictIDFlag, /* When applicable, dictID of dictionary is provided in frame header (default:1) */
/* dictionary parameters (must be set before ZSTD_CCtx_loadDictionary) */
ZSTD_p_dictMode=300, /* Select how dictionary content must be interpreted. Value must be from type ZSTD_dictMode_e.
* default : 0==auto : dictionary will be "full" if it respects specification, otherwise it will be "rawContent" */
/* multi-threading parameters */
ZSTD_p_nbThreads=400, /* Select how many threads a compression job can spawn (default:1)
* More threads improve speed, but also increase memory usage.
@ -1011,19 +1007,19 @@ ZSTDLIB_API size_t ZSTD_CCtx_setPledgedSrcSize(ZSTD_CCtx* cctx, unsigned long lo
* meaning "return to no-dictionary mode".
* Note 1 : `dict` content will be copied internally. Use
* ZSTD_CCtx_loadDictionary_byReference() to reference dictionary
* content instead.
* content instead. The dictionary buffer must then outlive its
* users.
* Note 2 : Loading a dictionary involves building tables, which are dependent on compression parameters.
* For this reason, compression parameters cannot be changed anymore after loading a dictionary.
* It's also a CPU-heavy operation, with non-negligible impact on latency.
* Note 3 : Dictionary will be used for all future compression jobs.
* To return to "no-dictionary" situation, load a NULL dictionary */
ZSTDLIB_API size_t ZSTD_CCtx_loadDictionary(ZSTD_CCtx* cctx, const void* dict, size_t dictSize);
/*! ZSTD_CCtx_loadDictionary_byReference() :
* Same as ZSTD_CCtx_loadDictionary() except dictionary content will be
* referenced, instead of copied. The dictionary buffer must outlive its users.
* To return to "no-dictionary" situation, load a NULL dictionary
* Note 5 : Use ZSTD_CCtx_loadDictionary_advanced() to select how dictionary
* content will be interpreted.
*/
ZSTDLIB_API size_t ZSTD_CCtx_loadDictionary(ZSTD_CCtx* cctx, const void* dict, size_t dictSize);
ZSTDLIB_API size_t ZSTD_CCtx_loadDictionary_byReference(ZSTD_CCtx* cctx, const void* dict, size_t dictSize);
ZSTDLIB_API size_t ZSTD_CCtx_loadDictionary_advanced(ZSTD_CCtx* cctx, const void* dict, size_t dictSize, ZSTD_dictLoadMethod_e dictLoadMethod, ZSTD_dictMode_e dictMode);
/*! ZSTD_CCtx_refCDict() :
@ -1050,8 +1046,11 @@ ZSTDLIB_API size_t ZSTD_CCtx_refCDict(ZSTD_CCtx* cctx, const ZSTD_CDict* cdict);
* Note 1 : Prefix buffer is referenced. It must outlive compression job.
* Note 2 : Referencing a prefix involves building tables, which are dependent on compression parameters.
* It's a CPU-heavy operation, with non-negligible impact on latency.
* Note 3 : it's possible to alter ZSTD_p_dictMode using ZSTD_CCtx_setParameter() */
* Note 3 : By default, the prefix is treated as raw content
* (ZSTD_dm_rawContent). Use ZSTD_CCtx_refPrefix_advanced() to alter
* dictMode. */
ZSTDLIB_API size_t ZSTD_CCtx_refPrefix(ZSTD_CCtx* cctx, const void* prefix, size_t prefixSize);
ZSTDLIB_API size_t ZSTD_CCtx_refPrefix_advanced(ZSTD_CCtx* cctx, const void* prefix, size_t prefixSize, ZSTD_dictMode_e dictMode);