| 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 | |
| 17 | size_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 */ |
| 23 | size_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 | */ |
| 30 | size_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 */ |