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 #include <memory> 19 #include "llvm/ADT/SmallVector.h" 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 60
