LLVM: llvm::object::Decompressor Class Reference

LLVM 8.0.1

Decompressor helps to handle decompression of compressed sections. More...

#include "llvm/Object/Decompressor.h"

Public Member Functions
template<class T >
Error	resizeAndDecompress (T &Out)
	Resize the buffer and uncompress section data into it. More...

Error	decompress (MutableArrayRef< char > Buffer)
	Uncompress section data to raw buffer provided. More...

uint64_t	getDecompressedSize ()
	Return memory buffer size required for decompression. More...

Static Public Member Functions
static Expected< Decompressor >	create (StringRef Name, StringRef Data, bool IsLE, bool Is64Bit)
	Create decompressor object. More...

static bool	isCompressed (const object::SectionRef &Section)
	Return true if section is compressed, including gnu-styled case. More...

static bool	isCompressedELFSection (uint64_t Flags, StringRef Name)
	Return true if section is a ELF compressed one. More...

static bool	isGnuStyle (StringRef Name)
	Return true if section name matches gnu style compressed one. More...

Detailed Description

Decompressor helps to handle decompression of compressed sections.

Definition at line 21 of file Decompressor.h.

Member Function Documentation

◆ create()

Expected< Decompressor > Decompressor::create	(	StringRef	Name,
		StringRef	Data,
		bool	IsLE,
		bool	Is64Bit
	)

static

Create decompressor object.

Parameters

Name	Section name.
Data	Section content.
IsLE	Flag determines if Data is in little endian form.
Is64Bit	Flag determines if object is 64 bit.

Definition at line 21 of file Decompressor.cpp.

References llvm::object::createError(), D, and llvm::zlib::isAvailable().

◆ decompress()

Error Decompressor::decompress ( MutableArrayRef< char > Buffer )

Uncompress section data to raw buffer provided.

Parameters

Buffer Destination buffer.

Definition at line 91 of file Decompressor.cpp.

References llvm::MutableArrayRef< T >::data(), Size, llvm::ArrayRef< T >::size(), and llvm::zlib::uncompress().

Referenced by resizeAndDecompress().

◆ getDecompressedSize()

uint64_t llvm::object::Decompressor::getDecompressedSize ( )

inline

Return memory buffer size required for decompression.

Definition at line 43 of file Decompressor.h.

References isCompressed(), isCompressedELFSection(), isGnuStyle(), and llvm::ARMBuildAttrs::Section.

◆ isCompressed()

bool Decompressor::isCompressed ( const object::SectionRef & Section )

static

Return true if section is compressed, including gnu-styled case.

Definition at line 80 of file Decompressor.cpp.

References llvm::object::SectionRef::getName(), llvm::object::SectionRef::isCompressed(), and Name.

Referenced by getDecompressedSize().

◆ isCompressedELFSection()

bool Decompressor::isCompressedELFSection	(	uint64_t	Flags,
		StringRef	Name
	)

static

Return true if section is a ELF compressed one.

Definition at line 87 of file Decompressor.cpp.

References llvm::ELF::SHF_COMPRESSED.

Referenced by getDecompressedSize().

◆ isGnuStyle()

bool Decompressor::isGnuStyle ( StringRef Name )

static

Return true if section name matches gnu style compressed one.

Definition at line 76 of file Decompressor.cpp.

References llvm::StringRef::startswith().

Referenced by getDecompressedSize().

◆ resizeAndDecompress()

template<class T >

Error llvm::object::Decompressor::resizeAndDecompress ( T & Out )

inline

Resize the buffer and uncompress section data into it.

Parameters

Out	Destination buffer.

Definition at line 33 of file Decompressor.h.

References decompress().

The documentation for this class was generated from the following files:

include/llvm/Object/Decompressor.h
lib/Object/Decompressor.cpp