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1 | //===-- llvm/Support/Compression.h ---Compression----------------*- C++ -*-===// |
2 | // | |
3 | // The LLVM Compiler Infrastructure | |
4 | // | |
5 | // This file is distributed under the University of Illinois Open Source | |
6 | // License. See LICENSE.TXT for details. | |
7 | // | |
8 | //===----------------------------------------------------------------------===// | |
9 | // | |
10 | // This file contains basic functions for compression/uncompression. | |
11 | // | |
12 | //===----------------------------------------------------------------------===// | |
13 | ||
14 | #ifndef LLVM_SUPPORT_COMPRESSION_H | |
15 | #define LLVM_SUPPORT_COMPRESSION_H | |
16 | ||
85aaf69f | 17 | #include "llvm/ADT/SmallVector.h" |
1a4d82fc JJ |
18 | #include "llvm/Support/DataTypes.h" |
19 | #include <memory> | |
1a4d82fc JJ |
20 | |
21 | namespace llvm { | |
22 | ||
23 | class StringRef; | |
24 | ||
25 | namespace zlib { | |
26 | ||
27 | enum CompressionLevel { | |
28 | NoCompression, | |
29 | DefaultCompression, | |
30 | BestSpeedCompression, | |
31 | BestSizeCompression | |
32 | }; | |
33 | ||
34 | enum Status { | |
35 | StatusOK, | |
36 | StatusUnsupported, // zlib is unavailable | |
37 | StatusOutOfMemory, // there was not enough memory | |
38 | StatusBufferTooShort, // there was not enough room in the output buffer | |
39 | StatusInvalidArg, // invalid input parameter | |
40 | StatusInvalidData // data was corrupted or incomplete | |
41 | }; | |
42 | ||
43 | bool isAvailable(); | |
44 | ||
45 | Status compress(StringRef InputBuffer, SmallVectorImpl<char> &CompressedBuffer, | |
46 | CompressionLevel Level = DefaultCompression); | |
47 | ||
48 | Status uncompress(StringRef InputBuffer, | |
49 | SmallVectorImpl<char> &UncompressedBuffer, | |
50 | size_t UncompressedSize); | |
51 | ||
52 | uint32_t crc32(StringRef Buffer); | |
53 | ||
54 | } // End of namespace zlib | |
55 | ||
56 | } // End of namespace llvm | |
57 | ||
58 | #endif | |
59 |