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//===-- llvm/Support/Compression.h ---Compression----------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains basic functions for compression/uncompression.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_COMPRESSION_H
#define LLVM_SUPPORT_COMPRESSION_H
#include "llvm/Support/DataTypes.h"
namespace llvm {
template <typename T> class SmallVectorImpl;
class StringRef;
namespace zlib {
enum CompressionLevel {
NoCompression,
DefaultCompression,
BestSpeedCompression,
BestSizeCompression
};
enum Status {
StatusOK,
StatusUnsupported, // zlib is unavailable
StatusOutOfMemory, // there was not enough memory
StatusBufferTooShort, // there was not enough room in the output buffer
StatusInvalidArg, // invalid input parameter
StatusInvalidData // data was corrupted or incomplete
};
bool isAvailable();
Status compress(StringRef InputBuffer, SmallVectorImpl<char> &CompressedBuffer,
CompressionLevel Level = DefaultCompression);
Status uncompress(StringRef InputBuffer,
SmallVectorImpl<char> &UncompressedBuffer,
size_t UncompressedSize);
uint32_t crc32(StringRef Buffer);
} // End of namespace zlib
} // End of namespace llvm
#endif
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