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