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4b9b25d943
Update the zstd implementation to match Linux zstd 1.5.2 from commit 2aa14b1ab2. This was motivated by running into decompression corruption issues when trying to uncompress files compressed with newer versions of zstd. zstd users also claim significantly improved decompression times with newer zstd versions which is a side benefit. Original zstd code was copied from Linux commit 2aa14b1ab2 which is a custom-built implementation based on zstd 1.3.1. Linux switched to an implementation that is a copy of the upstream zstd code in Linux commit e0c1b49f5b, this results in a large code diff. However this should make future updates easier along with other benefits[1]. This commit is a straight mirror of the Linux zstd code, except to: - update a few #include that do not translate cleanly - linux/swab.h -> asm/byteorder.h - linux/limits.h -> linux/kernel.h - linux/module.h -> linux/compat.h - remove assert() from debug.h so it doesn't conflict with u-boot's assert() - strip out the compressor code as was done in the previous u-boot zstd - update existing zstd users to the new Linux zstd API - change the #define for MEM_STATIC to use INLINE_KEYWORD for codesize - add a new KConfig option that sets zstd build options to minify code based on zstd's ZSTD_LIB_MINIFY[2]. These changes were tested by booting a zstd 1.5.2 compressed kernel inside a FIT. And the squashfs changes by loading a file from zstd compressed squashfs with sqfsload. buildman was used to compile test other boards and check for binary bloat, as follows: > $ buildman -b zstd2 --boards dh_imx6,m53menlo,mvebu_espressobin-88f3720,sandbox,sandbox64,stm32mp15_dhcom_basic,stm32mp15_dhcor_basic,turris_mox,turris_omnia -sS > Summary of 6 commits for 9 boards (8 threads, 1 job per thread) > 01: Merge branch '2023-01-10-platform-updates' > arm: w+ m53menlo dh_imx6 > 02: lib: zstd: update to latest Linux zstd 1.5.2 > aarch64: (for 2/2 boards) all -3186.0 rodata +920.0 text -4106.0 > arm: (for 5/5 boards) all +1254.4 rodata +940.0 text +314.4 > sandbox: (for 2/2 boards) all -4452.0 data -16.0 rodata +640.0 text -5076.0 [1]e0c1b49f5b
[2]f302ad8811/lib/libzstd.mk (L31)
Signed-off-by: Brandon Maier <brandon.maier@collins.com> [trini: Set ret to -EINVAL for the error of "failed to detect compressed" to fix warning, drop ZSTD_SRCSIZEHINT_MAX for non-Linux host tool builds] Signed-off-by: Tom Rini <trini@konsulko.com>
241 lines
8.8 KiB
C
241 lines
8.8 KiB
C
/*
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* Copyright (c) Yann Collet, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under both the BSD-style license (found in the
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* LICENSE file in the root directory of this source tree) and the GPLv2 (found
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* in the COPYING file in the root directory of this source tree).
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* You may select, at your option, one of the above-listed licenses.
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*/
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/* zstd_ddict.c :
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* concentrates all logic that needs to know the internals of ZSTD_DDict object */
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/*-*******************************************************
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* Dependencies
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*********************************************************/
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#include "../common/zstd_deps.h" /* ZSTD_memcpy, ZSTD_memmove, ZSTD_memset */
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#include "../common/cpu.h" /* bmi2 */
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#include "../common/mem.h" /* low level memory routines */
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#define FSE_STATIC_LINKING_ONLY
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#include "../common/fse.h"
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#define HUF_STATIC_LINKING_ONLY
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#include "../common/huf.h"
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#include "zstd_decompress_internal.h"
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#include "zstd_ddict.h"
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/*-*******************************************************
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* Types
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*********************************************************/
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struct ZSTD_DDict_s {
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void* dictBuffer;
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const void* dictContent;
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size_t dictSize;
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ZSTD_entropyDTables_t entropy;
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U32 dictID;
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U32 entropyPresent;
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ZSTD_customMem cMem;
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}; /* typedef'd to ZSTD_DDict within "zstd.h" */
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const void* ZSTD_DDict_dictContent(const ZSTD_DDict* ddict)
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{
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assert(ddict != NULL);
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return ddict->dictContent;
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}
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size_t ZSTD_DDict_dictSize(const ZSTD_DDict* ddict)
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{
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assert(ddict != NULL);
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return ddict->dictSize;
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}
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void ZSTD_copyDDictParameters(ZSTD_DCtx* dctx, const ZSTD_DDict* ddict)
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{
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DEBUGLOG(4, "ZSTD_copyDDictParameters");
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assert(dctx != NULL);
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assert(ddict != NULL);
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dctx->dictID = ddict->dictID;
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dctx->prefixStart = ddict->dictContent;
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dctx->virtualStart = ddict->dictContent;
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dctx->dictEnd = (const BYTE*)ddict->dictContent + ddict->dictSize;
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dctx->previousDstEnd = dctx->dictEnd;
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#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
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dctx->dictContentBeginForFuzzing = dctx->prefixStart;
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dctx->dictContentEndForFuzzing = dctx->previousDstEnd;
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#endif
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if (ddict->entropyPresent) {
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dctx->litEntropy = 1;
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dctx->fseEntropy = 1;
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dctx->LLTptr = ddict->entropy.LLTable;
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dctx->MLTptr = ddict->entropy.MLTable;
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dctx->OFTptr = ddict->entropy.OFTable;
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dctx->HUFptr = ddict->entropy.hufTable;
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dctx->entropy.rep[0] = ddict->entropy.rep[0];
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dctx->entropy.rep[1] = ddict->entropy.rep[1];
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dctx->entropy.rep[2] = ddict->entropy.rep[2];
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} else {
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dctx->litEntropy = 0;
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dctx->fseEntropy = 0;
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}
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}
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static size_t
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ZSTD_loadEntropy_intoDDict(ZSTD_DDict* ddict,
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ZSTD_dictContentType_e dictContentType)
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{
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ddict->dictID = 0;
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ddict->entropyPresent = 0;
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if (dictContentType == ZSTD_dct_rawContent) return 0;
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if (ddict->dictSize < 8) {
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if (dictContentType == ZSTD_dct_fullDict)
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return ERROR(dictionary_corrupted); /* only accept specified dictionaries */
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return 0; /* pure content mode */
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}
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{ U32 const magic = MEM_readLE32(ddict->dictContent);
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if (magic != ZSTD_MAGIC_DICTIONARY) {
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if (dictContentType == ZSTD_dct_fullDict)
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return ERROR(dictionary_corrupted); /* only accept specified dictionaries */
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return 0; /* pure content mode */
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}
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}
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ddict->dictID = MEM_readLE32((const char*)ddict->dictContent + ZSTD_FRAMEIDSIZE);
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/* load entropy tables */
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RETURN_ERROR_IF(ZSTD_isError(ZSTD_loadDEntropy(
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&ddict->entropy, ddict->dictContent, ddict->dictSize)),
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dictionary_corrupted, "");
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ddict->entropyPresent = 1;
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return 0;
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}
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static size_t ZSTD_initDDict_internal(ZSTD_DDict* ddict,
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const void* dict, size_t dictSize,
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ZSTD_dictLoadMethod_e dictLoadMethod,
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ZSTD_dictContentType_e dictContentType)
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{
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if ((dictLoadMethod == ZSTD_dlm_byRef) || (!dict) || (!dictSize)) {
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ddict->dictBuffer = NULL;
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ddict->dictContent = dict;
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if (!dict) dictSize = 0;
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} else {
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void* const internalBuffer = ZSTD_customMalloc(dictSize, ddict->cMem);
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ddict->dictBuffer = internalBuffer;
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ddict->dictContent = internalBuffer;
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if (!internalBuffer) return ERROR(memory_allocation);
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ZSTD_memcpy(internalBuffer, dict, dictSize);
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}
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ddict->dictSize = dictSize;
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ddict->entropy.hufTable[0] = (HUF_DTable)((HufLog)*0x1000001); /* cover both little and big endian */
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/* parse dictionary content */
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FORWARD_IF_ERROR( ZSTD_loadEntropy_intoDDict(ddict, dictContentType) , "");
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return 0;
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}
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ZSTD_DDict* ZSTD_createDDict_advanced(const void* dict, size_t dictSize,
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ZSTD_dictLoadMethod_e dictLoadMethod,
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ZSTD_dictContentType_e dictContentType,
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ZSTD_customMem customMem)
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{
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if ((!customMem.customAlloc) ^ (!customMem.customFree)) return NULL;
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{ ZSTD_DDict* const ddict = (ZSTD_DDict*) ZSTD_customMalloc(sizeof(ZSTD_DDict), customMem);
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if (ddict == NULL) return NULL;
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ddict->cMem = customMem;
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{ size_t const initResult = ZSTD_initDDict_internal(ddict,
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dict, dictSize,
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dictLoadMethod, dictContentType);
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if (ZSTD_isError(initResult)) {
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ZSTD_freeDDict(ddict);
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return NULL;
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} }
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return ddict;
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}
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}
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/*! ZSTD_createDDict() :
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* Create a digested dictionary, to start decompression without startup delay.
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* `dict` content is copied inside DDict.
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* Consequently, `dict` can be released after `ZSTD_DDict` creation */
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ZSTD_DDict* ZSTD_createDDict(const void* dict, size_t dictSize)
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{
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ZSTD_customMem const allocator = { NULL, NULL, NULL };
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return ZSTD_createDDict_advanced(dict, dictSize, ZSTD_dlm_byCopy, ZSTD_dct_auto, allocator);
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}
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/*! ZSTD_createDDict_byReference() :
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* Create a digested dictionary, to start decompression without startup delay.
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* Dictionary content is simply referenced, it will be accessed during decompression.
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* Warning : dictBuffer must outlive DDict (DDict must be freed before dictBuffer) */
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ZSTD_DDict* ZSTD_createDDict_byReference(const void* dictBuffer, size_t dictSize)
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{
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ZSTD_customMem const allocator = { NULL, NULL, NULL };
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return ZSTD_createDDict_advanced(dictBuffer, dictSize, ZSTD_dlm_byRef, ZSTD_dct_auto, allocator);
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}
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const ZSTD_DDict* ZSTD_initStaticDDict(
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void* sBuffer, size_t sBufferSize,
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const void* dict, size_t dictSize,
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ZSTD_dictLoadMethod_e dictLoadMethod,
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ZSTD_dictContentType_e dictContentType)
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{
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size_t const neededSpace = sizeof(ZSTD_DDict)
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+ (dictLoadMethod == ZSTD_dlm_byRef ? 0 : dictSize);
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ZSTD_DDict* const ddict = (ZSTD_DDict*)sBuffer;
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assert(sBuffer != NULL);
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assert(dict != NULL);
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if ((size_t)sBuffer & 7) return NULL; /* 8-aligned */
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if (sBufferSize < neededSpace) return NULL;
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if (dictLoadMethod == ZSTD_dlm_byCopy) {
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ZSTD_memcpy(ddict+1, dict, dictSize); /* local copy */
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dict = ddict+1;
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}
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if (ZSTD_isError( ZSTD_initDDict_internal(ddict,
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dict, dictSize,
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ZSTD_dlm_byRef, dictContentType) ))
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return NULL;
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return ddict;
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}
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size_t ZSTD_freeDDict(ZSTD_DDict* ddict)
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{
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if (ddict==NULL) return 0; /* support free on NULL */
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{ ZSTD_customMem const cMem = ddict->cMem;
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ZSTD_customFree(ddict->dictBuffer, cMem);
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ZSTD_customFree(ddict, cMem);
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return 0;
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}
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}
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/*! ZSTD_estimateDDictSize() :
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* Estimate amount of memory that will be needed to create a dictionary for decompression.
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* Note : dictionary created by reference using ZSTD_dlm_byRef are smaller */
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size_t ZSTD_estimateDDictSize(size_t dictSize, ZSTD_dictLoadMethod_e dictLoadMethod)
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{
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return sizeof(ZSTD_DDict) + (dictLoadMethod == ZSTD_dlm_byRef ? 0 : dictSize);
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}
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size_t ZSTD_sizeof_DDict(const ZSTD_DDict* ddict)
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{
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if (ddict==NULL) return 0; /* support sizeof on NULL */
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return sizeof(*ddict) + (ddict->dictBuffer ? ddict->dictSize : 0) ;
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}
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/*! ZSTD_getDictID_fromDDict() :
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* Provides the dictID of the dictionary loaded into `ddict`.
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* If @return == 0, the dictionary is not conformant to Zstandard specification, or empty.
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* Non-conformant dictionaries can still be loaded, but as content-only dictionaries. */
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unsigned ZSTD_getDictID_fromDDict(const ZSTD_DDict* ddict)
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{
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if (ddict==NULL) return 0;
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return ZSTD_getDictID_fromDict(ddict->dictContent, ddict->dictSize);
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}
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