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 StringRef; 22 23 namespace zlib { 24 25 enum CompressionLevel { 26 NoCompression, 27 DefaultCompression, 28 BestSpeedCompression, 29 BestSizeCompression 30 }; 31 32 enum Status { 33 StatusOK, 34 StatusUnsupported, // zlib is unavailable 35 StatusOutOfMemory, // there was not enough memory 36 StatusBufferTooShort, // there was not enough room in the output buffer 37 StatusInvalidArg, // invalid input parameter 38 StatusInvalidData // data was corrupted or incomplete 39 }; 40 41 bool isAvailable(); 42 43 Status compress(StringRef InputBuffer, SmallVectorImpl<char> &CompressedBuffer, 44 CompressionLevel Level = DefaultCompression); 45 46 Status uncompress(StringRef InputBuffer, 47 SmallVectorImpl<char> &UncompressedBuffer, 48 size_t UncompressedSize); 49 50 uint32_t crc32(StringRef Buffer); 51 52 } // End of namespace zlib 53 54 } // End of namespace llvm 55 56 #endif 57 58
