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1/*2 * Copyright (c) Yann Collet, Facebook, Inc.3 * All rights reserved.4 *5 * This source code is licensed under both the BSD-style license (found in the6 * LICENSE file in the root directory of this source tree) and the GPLv2 (found7 * in the COPYING file in the root directory of this source tree).8 * You may select, at your option, one of the above-listed licenses.9 */10 11 12#ifndef ZSTD_DEC_BLOCK_H13#define ZSTD_DEC_BLOCK_H14 15/*-*******************************************************16 * Dependencies17 *********************************************************/18#include "../common/zstd_deps.h" /* size_t */19#include <linux/zstd.h> /* DCtx, and some public functions */20#include "../common/zstd_internal.h" /* blockProperties_t, and some public functions */21#include "zstd_decompress_internal.h" /* ZSTD_seqSymbol */22 23 24/* === Prototypes === */25 26/* note: prototypes already published within `zstd.h` :27 * ZSTD_decompressBlock()28 */29 30/* note: prototypes already published within `zstd_internal.h` :31 * ZSTD_getcBlockSize()32 * ZSTD_decodeSeqHeaders()33 */34 35 36 /* Streaming state is used to inform allocation of the literal buffer */37typedef enum {38 not_streaming = 0,39 is_streaming = 140} streaming_operation;41 42/* ZSTD_decompressBlock_internal() :43 * decompress block, starting at `src`,44 * into destination buffer `dst`.45 * @return : decompressed block size,46 * or an error code (which can be tested using ZSTD_isError())47 */48size_t ZSTD_decompressBlock_internal(ZSTD_DCtx* dctx,49 void* dst, size_t dstCapacity,50 const void* src, size_t srcSize, const int frame, const streaming_operation streaming);51 52/* ZSTD_buildFSETable() :53 * generate FSE decoding table for one symbol (ll, ml or off)54 * this function must be called with valid parameters only55 * (dt is large enough, normalizedCounter distribution total is a power of 2, max is within range, etc.)56 * in which case it cannot fail.57 * The workspace must be 4-byte aligned and at least ZSTD_BUILD_FSE_TABLE_WKSP_SIZE bytes, which is58 * defined in zstd_decompress_internal.h.59 * Internal use only.60 */61void ZSTD_buildFSETable(ZSTD_seqSymbol* dt,62 const short* normalizedCounter, unsigned maxSymbolValue,63 const U32* baseValue, const U8* nbAdditionalBits,64 unsigned tableLog, void* wksp, size_t wkspSize,65 int bmi2);66 67 68#endif /* ZSTD_DEC_BLOCK_H */69