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 17 #include "llvm/Support/DataTypes.h" 18 19 namespace llvm { 20 template <typename T> class SmallVectorImpl; 21 class Error; 22 class StringRef; 23 24 namespace zlib { 25 26 enum CompressionLevel { 27 NoCompression, 28 DefaultCompression, 29 BestSpeedCompression, 30 BestSizeCompression 31 }; 32 33 bool isAvailable(); 34 35 Error compress(StringRef InputBuffer, SmallVectorImpl<char> &CompressedBuffer, 36 CompressionLevel Level = DefaultCompression); 37 38 Error uncompress(StringRef InputBuffer, char *UncompressedBuffer, 39 size_t &UncompressedSize); 40 41 Error uncompress(StringRef InputBuffer, 42 SmallVectorImpl<char> &UncompressedBuffer, 43 size_t UncompressedSize); 44 45 uint32_t crc32(StringRef Buffer); 46 47 } // End of namespace zlib 48 49 } // End of namespace llvm 50 51 #endif 52 53
