1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
//===-- Decompressor.h ------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===/
#ifndef LLVM_OBJECT_DECOMPRESSOR_H
#define LLVM_OBJECT_DECOMPRESSOR_H
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Object/ObjectFile.h"
namespace llvm {
namespace object {
/// @brief Decompressor helps to handle decompression of compressed sections.
class Decompressor {
public:
/// @brief Create decompressor object.
/// @param Name Section name.
/// @param Data Section content.
/// @param IsLE Flag determines if Data is in little endian form.
/// @param Is64Bit Flag determines if object is 64 bit.
static Expected<Decompressor> create(StringRef Name, StringRef Data,
bool IsLE, bool Is64Bit);
/// @brief Resize the buffer and uncompress section data into it.
/// @param Out Destination buffer.
Error decompress(SmallString<32> &Out);
/// @brief Uncompress section data to raw buffer provided.
/// @param Buffer Destination buffer.
Error decompress(MutableArrayRef<char> Buffer);
/// @brief Return memory buffer size required for decompression.
uint64_t getDecompressedSize() { return DecompressedSize; }
/// @brief Return true if section is compressed, including gnu-styled case.
static bool isCompressed(const object::SectionRef &Section);
/// @brief Return true if section is a ELF compressed one.
static bool isCompressedELFSection(uint64_t Flags, StringRef Name);
/// @brief Return true if section name matches gnu style compressed one.
static bool isGnuStyle(StringRef Name);
private:
Decompressor(StringRef Data);
Error consumeCompressedGnuHeader();
Error consumeCompressedZLibHeader(bool Is64Bit, bool IsLittleEndian);
StringRef SectionData;
uint64_t DecompressedSize;
};
} // end namespace object
} // end namespace llvm
#endif // LLVM_OBJECT_DECOMPRESSOR_H
|
