contrib/llvm/include/llvm/Support/Compression.h

   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