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1/* SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause */
2/*
3 * Copyright (c) Meta Platforms, Inc. and affiliates.
4 * All rights reserved.
5 *
6 * This source code is licensed under both the BSD-style license (found in the
7 * LICENSE file in the root directory of this source tree) and the GPLv2 (found
8 * in the COPYING file in the root directory of this source tree).
9 * You may select, at your option, one of the above-listed licenses.
10 */
11
12#ifndef ZSTD_COMPRESS_LITERALS_H
13#define ZSTD_COMPRESS_LITERALS_H
14
15#include "zstd_compress_internal.h" /* ZSTD_hufCTables_t, ZSTD_minGain() */
16
17
18size_t ZSTD_noCompressLiterals (void* dst, size_t dstCapacity, const void* src, size_t srcSize);
19
20/* ZSTD_compressRleLiteralsBlock() :
21 * Conditions :
22 * - All bytes in @src are identical
23 * - dstCapacity >= 4 */
24size_t ZSTD_compressRleLiteralsBlock (void* dst, size_t dstCapacity, const void* src, size_t srcSize);
25
26/* ZSTD_compressLiterals():
27 * @entropyWorkspace: must be aligned on 4-bytes boundaries
28 * @entropyWorkspaceSize : must be >= HUF_WORKSPACE_SIZE
29 * @suspectUncompressible: sampling checks, to potentially skip huffman coding
30 */
31size_t ZSTD_compressLiterals (void* dst, size_t dstCapacity,
32 const void* src, size_t srcSize,
33 void* entropyWorkspace, size_t entropyWorkspaceSize,
34 const ZSTD_hufCTables_t* prevHuf,
35 ZSTD_hufCTables_t* nextHuf,
36 ZSTD_strategy strategy, int disableLiteralCompression,
37 int suspectUncompressible,
38 int bmi2);
39
40#endif /* ZSTD_COMPRESS_LITERALS_H */