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| Rev | Author | Line No. | Line |
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| 14 | pmbaty | 1 | //===-- Decompressor.h ------------------------------------------*- C++ -*-===// |
| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===/ |
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| 8 | |||
| 9 | #ifndef LLVM_OBJECT_DECOMPRESSOR_H |
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| 10 | #define LLVM_OBJECT_DECOMPRESSOR_H |
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| 11 | |||
| 12 | #include "llvm/ADT/ArrayRef.h" |
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| 13 | #include "llvm/ADT/StringRef.h" |
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| 14 | #include "llvm/Support/Compression.h" |
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| 15 | #include "llvm/Support/Error.h" |
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| 16 | |||
| 17 | namespace llvm { |
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| 18 | namespace object { |
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| 19 | |||
| 20 | /// Decompressor helps to handle decompression of compressed sections. |
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| 21 | class Decompressor { |
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| 22 | public: |
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| 23 | /// Create decompressor object. |
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| 24 | /// @param Name Section name. |
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| 25 | /// @param Data Section content. |
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| 26 | /// @param IsLE Flag determines if Data is in little endian form. |
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| 27 | /// @param Is64Bit Flag determines if object is 64 bit. |
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| 28 | static Expected<Decompressor> create(StringRef Name, StringRef Data, |
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| 29 | bool IsLE, bool Is64Bit); |
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| 30 | |||
| 31 | /// Resize the buffer and uncompress section data into it. |
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| 32 | /// @param Out Destination buffer. |
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| 33 | template <class T> Error resizeAndDecompress(T &Out) { |
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| 34 | Out.resize(DecompressedSize); |
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| 35 | return decompress({(uint8_t *)Out.data(), (size_t)DecompressedSize}); |
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| 36 | } |
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| 37 | |||
| 38 | /// Uncompress section data to raw buffer provided. |
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| 39 | Error decompress(MutableArrayRef<uint8_t> Output); |
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| 40 | |||
| 41 | /// Return memory buffer size required for decompression. |
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| 42 | uint64_t getDecompressedSize() { return DecompressedSize; } |
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| 43 | |||
| 44 | private: |
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| 45 | Decompressor(StringRef Data); |
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| 46 | |||
| 47 | Error consumeCompressedHeader(bool Is64Bit, bool IsLittleEndian); |
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| 48 | |||
| 49 | StringRef SectionData; |
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| 50 | uint64_t DecompressedSize; |
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| 51 | DebugCompressionType CompressionType = DebugCompressionType::None; |
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| 52 | }; |
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| 53 | |||
| 54 | } // end namespace object |
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| 55 | } // end namespace llvm |
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| 56 | |||
| 57 | #endif // LLVM_OBJECT_DECOMPRESSOR_H |