1 //===-- llvm/Support/Compression.h ---Compression----------------*- C++ -*-===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // This file contains basic functions for compression/uncompression.
11 //===----------------------------------------------------------------------===//
13 #ifndef LLVM_SUPPORT_COMPRESSION_H
14 #define LLVM_SUPPORT_COMPRESSION_H
16 #include "llvm/Support/DataTypes.h"
19 template <typename T> class SmallVectorImpl;
25 static constexpr int NoCompression = 0;
26 static constexpr int BestSpeedCompression = 1;
27 static constexpr int DefaultCompression = 6;
28 static constexpr int BestSizeCompression = 9;
32 Error compress(StringRef InputBuffer, SmallVectorImpl<char> &CompressedBuffer,
33 int Level = DefaultCompression);
35 Error uncompress(StringRef InputBuffer, char *UncompressedBuffer,
36 size_t &UncompressedSize);
38 Error uncompress(StringRef InputBuffer,
39 SmallVectorImpl<char> &UncompressedBuffer,
40 size_t UncompressedSize);
42 uint32_t crc32(StringRef Buffer);
44 } // End of namespace zlib
46 } // End of namespace llvm