1*a28cd43dSSascha Wildner /* 2*a28cd43dSSascha Wildner * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc. 3*a28cd43dSSascha Wildner * All rights reserved. 4*a28cd43dSSascha Wildner * 5*a28cd43dSSascha Wildner * This source code is licensed under both the BSD-style license (found in the 6*a28cd43dSSascha Wildner * LICENSE file in the root directory of this source tree) and the GPLv2 (found 7*a28cd43dSSascha Wildner * in the COPYING file in the root directory of this source tree). 8*a28cd43dSSascha Wildner * You may select, at your option, one of the above-listed licenses. 9*a28cd43dSSascha Wildner */ 10*a28cd43dSSascha Wildner 11*a28cd43dSSascha Wildner 12*a28cd43dSSascha Wildner #ifndef ZSTD_DEC_BLOCK_H 13*a28cd43dSSascha Wildner #define ZSTD_DEC_BLOCK_H 14*a28cd43dSSascha Wildner 15*a28cd43dSSascha Wildner /*-******************************************************* 16*a28cd43dSSascha Wildner * Dependencies 17*a28cd43dSSascha Wildner *********************************************************/ 18*a28cd43dSSascha Wildner #include "../common/zstd_deps.h" /* size_t */ 19*a28cd43dSSascha Wildner #include "../zstd.h" /* DCtx, and some public functions */ 20*a28cd43dSSascha Wildner #include "../common/zstd_internal.h" /* blockProperties_t, and some public functions */ 21*a28cd43dSSascha Wildner #include "zstd_decompress_internal.h" /* ZSTD_seqSymbol */ 22*a28cd43dSSascha Wildner 23*a28cd43dSSascha Wildner 24*a28cd43dSSascha Wildner /* === Prototypes === */ 25*a28cd43dSSascha Wildner 26*a28cd43dSSascha Wildner /* note: prototypes already published within `zstd.h` : 27*a28cd43dSSascha Wildner * ZSTD_decompressBlock() 28*a28cd43dSSascha Wildner */ 29*a28cd43dSSascha Wildner 30*a28cd43dSSascha Wildner /* note: prototypes already published within `zstd_internal.h` : 31*a28cd43dSSascha Wildner * ZSTD_getcBlockSize() 32*a28cd43dSSascha Wildner * ZSTD_decodeSeqHeaders() 33*a28cd43dSSascha Wildner */ 34*a28cd43dSSascha Wildner 35*a28cd43dSSascha Wildner 36*a28cd43dSSascha Wildner /* ZSTD_decompressBlock_internal() : 37*a28cd43dSSascha Wildner * decompress block, starting at `src`, 38*a28cd43dSSascha Wildner * into destination buffer `dst`. 39*a28cd43dSSascha Wildner * @return : decompressed block size, 40*a28cd43dSSascha Wildner * or an error code (which can be tested using ZSTD_isError()) 41*a28cd43dSSascha Wildner */ 42*a28cd43dSSascha Wildner size_t ZSTD_decompressBlock_internal(ZSTD_DCtx* dctx, 43*a28cd43dSSascha Wildner void* dst, size_t dstCapacity, 44*a28cd43dSSascha Wildner const void* src, size_t srcSize, const int frame); 45*a28cd43dSSascha Wildner 46*a28cd43dSSascha Wildner /* ZSTD_buildFSETable() : 47*a28cd43dSSascha Wildner * generate FSE decoding table for one symbol (ll, ml or off) 48*a28cd43dSSascha Wildner * this function must be called with valid parameters only 49*a28cd43dSSascha Wildner * (dt is large enough, normalizedCounter distribution total is a power of 2, max is within range, etc.) 50*a28cd43dSSascha Wildner * in which case it cannot fail. 51*a28cd43dSSascha Wildner * The workspace must be 4-byte aligned and at least ZSTD_BUILD_FSE_TABLE_WKSP_SIZE bytes, which is 52*a28cd43dSSascha Wildner * defined in zstd_decompress_internal.h. 53*a28cd43dSSascha Wildner * Internal use only. 54*a28cd43dSSascha Wildner */ 55*a28cd43dSSascha Wildner void ZSTD_buildFSETable(ZSTD_seqSymbol* dt, 56*a28cd43dSSascha Wildner const short* normalizedCounter, unsigned maxSymbolValue, 57*a28cd43dSSascha Wildner const U32* baseValue, const U32* nbAdditionalBits, 58*a28cd43dSSascha Wildner unsigned tableLog, void* wksp, size_t wkspSize, 59*a28cd43dSSascha Wildner int bmi2); 60*a28cd43dSSascha Wildner 61*a28cd43dSSascha Wildner 62*a28cd43dSSascha Wildner #endif /* ZSTD_DEC_BLOCK_H */ 63