deps/libchdr/deps/zstd-1.5.5/lib/compress/zstd_compress_literals.h

   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 */