1/*
2 * Copyright (c) Meta Platforms, Inc. and affiliates.
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#ifndef ZSTD_COMPRESS_LITERALS_H
12#define ZSTD_COMPRESS_LITERALS_H
13
14#include "zstd_compress_internal.h" /* ZSTD_hufCTables_t, ZSTD_minGain() */
15
16
17size_t ZSTD_noCompressLiterals (void* dst, size_t dstCapacity, const void* src, size_t srcSize);
18
19/* ZSTD_compressRleLiteralsBlock() :
20 * Conditions :
21 * - All bytes in @src are identical
22 * - dstCapacity >= 4 */
23size_t ZSTD_compressRleLiteralsBlock (void* dst, size_t dstCapacity, const void* src, size_t srcSize);
24
25/* ZSTD_compressLiterals():
26 * @entropyWorkspace: must be aligned on 4-bytes boundaries
27 * @entropyWorkspaceSize : must be >= HUF_WORKSPACE_SIZE
28 * @suspectUncompressible: sampling checks, to potentially skip huffman coding
29 */
30size_t ZSTD_compressLiterals (void* dst, size_t dstCapacity,
31 const void* src, size_t srcSize,
32 void* entropyWorkspace, size_t entropyWorkspaceSize,
33 const ZSTD_hufCTables_t* prevHuf,
34 ZSTD_hufCTables_t* nextHuf,
35 ZSTD_strategy strategy, int disableLiteralCompression,
36 int suspectUncompressible,
37 int bmi2);
38
39#endif /* ZSTD_COMPRESS_LITERALS_H */
40