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4b50bcdc97
SmallVectors are convenient, but they don't cover every use case. In particular, they are fairly large (3 pointers + one element) and there is no way to take ownership of the buffer to put it somewhere else. This patch then adds a lower lever interface that works with any buffer. llvm-svn: 281082
61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
//===-- llvm/Support/Compression.h ---Compression----------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains basic functions for compression/uncompression.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_COMPRESSION_H
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#define LLVM_SUPPORT_COMPRESSION_H
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#include "llvm/Support/DataTypes.h"
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namespace llvm {
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template <typename T> class SmallVectorImpl;
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class StringRef;
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namespace zlib {
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enum CompressionLevel {
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NoCompression,
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DefaultCompression,
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BestSpeedCompression,
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BestSizeCompression
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};
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enum Status {
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StatusOK,
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StatusUnsupported, // zlib is unavailable
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StatusOutOfMemory, // there was not enough memory
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StatusBufferTooShort, // there was not enough room in the output buffer
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StatusInvalidArg, // invalid input parameter
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StatusInvalidData // data was corrupted or incomplete
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};
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bool isAvailable();
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Status compress(StringRef InputBuffer, SmallVectorImpl<char> &CompressedBuffer,
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CompressionLevel Level = DefaultCompression);
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Status uncompress(StringRef InputBuffer, char *UncompressedBuffer,
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size_t &UncompressedSize);
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Status uncompress(StringRef InputBuffer,
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SmallVectorImpl<char> &UncompressedBuffer,
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size_t UncompressedSize);
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uint32_t crc32(StringRef Buffer);
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} // End of namespace zlib
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} // End of namespace llvm
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#endif
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