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Linux kernel mirror (for testing)
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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 the
6 * LICENSE file in the root directory of this source tree) and the GPLv2 (found
7 * 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_H
13#define ZSTD_DEC_BLOCK_H
14
15/*-*******************************************************
16 * Dependencies
17 *********************************************************/
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/* ZSTD_decompressBlock_internal() :
37 * decompress block, starting at `src`,
38 * into destination buffer `dst`.
39 * @return : decompressed block size,
40 * or an error code (which can be tested using ZSTD_isError())
41 */
42size_t ZSTD_decompressBlock_internal(ZSTD_DCtx* dctx,
43 void* dst, size_t dstCapacity,
44 const void* src, size_t srcSize, const int frame);
45
46/* ZSTD_buildFSETable() :
47 * generate FSE decoding table for one symbol (ll, ml or off)
48 * this function must be called with valid parameters only
49 * (dt is large enough, normalizedCounter distribution total is a power of 2, max is within range, etc.)
50 * in which case it cannot fail.
51 * The workspace must be 4-byte aligned and at least ZSTD_BUILD_FSE_TABLE_WKSP_SIZE bytes, which is
52 * defined in zstd_decompress_internal.h.
53 * Internal use only.
54 */
55void ZSTD_buildFSETable(ZSTD_seqSymbol* dt,
56 const short* normalizedCounter, unsigned maxSymbolValue,
57 const U32* baseValue, const U32* nbAdditionalBits,
58 unsigned tableLog, void* wksp, size_t wkspSize,
59 int bmi2);
60
61
62#endif /* ZSTD_DEC_BLOCK_H */