wpi::WritableMemoryBuffer Class Reference

This class is an extension of MemoryBuffer, which allows copy-on-write access to the underlying contents. More...

#include <wpi/MemoryBuffer.h>

Inheritance diagram for wpi::WritableMemoryBuffer:

Public Member Functions
uint8_t *	begin ()
uint8_t *	end ()
std::span< uint8_t >	GetBuffer ()
std::span< char >	GetCharBuffer () const
const uint8_t *	begin () const
const uint8_t *	end () const
std::span< const uint8_t >	GetBuffer () const
size_t	size () const
Public Member Functions inherited from wpi::MemoryBuffer
	MemoryBuffer (const MemoryBuffer &)=delete
MemoryBuffer &	operator= (const MemoryBuffer &)=delete
virtual	~MemoryBuffer ()
const uint8_t *	begin () const
const uint8_t *	end () const
size_t	size () const
std::span< const uint8_t >	GetBuffer () const
std::span< const char >	GetCharBuffer () const
virtual std::string_view	GetBufferIdentifier () const
	Return an identifier for this buffer, typically the filename it was read from.
virtual BufferKind	GetBufferKind () const =0
	Return information on the memory mechanism used to support the MemoryBuffer.
MemoryBufferRef	GetMemBufferRef () const

Static Public Member Functions
static std::unique_ptr< WritableMemoryBuffer >	GetFile (std::string_view filename, std::error_code &ec, int64_t fileSize=-1)
static std::unique_ptr< WritableMemoryBuffer >	GetFileSlice (std::string_view filename, std::error_code &ec, uint64_t mapSize, uint64_t offset)
	Map a subrange of the specified file as a WritableMemoryBuffer.
static std::unique_ptr< WritableMemoryBuffer >	GetNewUninitMemBuffer (size_t size, std::string_view bufferName="")
	Allocate a new MemoryBuffer of the specified size that is not initialized.
static std::unique_ptr< WritableMemoryBuffer >	GetNewMemBuffer (size_t size, std::string_view bufferName="")
	Allocate a new zero-initialized MemoryBuffer of the specified size.
Static Public Member Functions inherited from wpi::MemoryBuffer
static wpi::expected< std::unique_ptr< MemoryBuffer >, std::error_code >	GetFile (std::string_view filename, int64_t fileSize=-1)
	Open the specified file as a MemoryBuffer, returning a new MemoryBuffer if successful, otherwise returning null.
static std::unique_ptr< MemoryBuffer >	GetFileAsStream (std::string_view filename, std::error_code &ec)
	Read all of the specified file into a MemoryBuffer as a stream (i.e.
static std::unique_ptr< MemoryBuffer >	GetOpenFileSlice (fs::file_t f, std::string_view filename, std::error_code &ec, uint64_t mapSize, int64_t offset)
	Given an already-open file descriptor, map some slice of it into a MemoryBuffer.
static std::unique_ptr< MemoryBuffer >	GetOpenFile (fs::file_t f, std::string_view filename, std::error_code &ec, uint64_t fileSize)
	Given an already-open file descriptor, read the file and return a MemoryBuffer.
static std::unique_ptr< MemoryBuffer >	GetMemBuffer (std::span< const uint8_t > inputData, std::string_view bufferName="")
	Open the specified memory range as a MemoryBuffer.
static std::unique_ptr< MemoryBuffer >	GetMemBuffer (MemoryBufferRef ref)
static std::unique_ptr< MemoryBuffer >	GetMemBufferCopy (std::span< const uint8_t > inputData, std::string_view bufferName="")
	Open the specified memory range as a MemoryBuffer, copying the contents and taking ownership of it.
static std::unique_ptr< MemoryBuffer >	GetFileSlice (std::string_view filename, std::error_code &ec, uint64_t mapSize, uint64_t offset)
	Map a subrange of the specified file as a MemoryBuffer.

Protected Member Functions
	WritableMemoryBuffer ()=default
Protected Member Functions inherited from wpi::MemoryBuffer
	MemoryBuffer ()=default
void	Init (const uint8_t *bufStart, const uint8_t *bufEnd)

Additional Inherited Members
Public Types inherited from wpi::MemoryBuffer
enum	BufferKind { MemoryBuffer_Malloc , MemoryBuffer_MMap }
	The kind of memory backing used to support the MemoryBuffer. More...

Detailed Description

This class is an extension of MemoryBuffer, which allows copy-on-write access to the underlying contents.

It only supports creation methods that are guaranteed to produce a writable buffer. For example, mapping a file read-only is not supported.

Constructor & Destructor Documentation

WritableMemoryBuffer()

wpi::WritableMemoryBuffer::WritableMemoryBuffer ( )

protecteddefault

Member Function Documentation

begin() [1/2]

uint8_t * wpi::WritableMemoryBuffer::begin ( )

inline

begin() [2/2]

const uint8_t * wpi::MemoryBuffer::begin ( ) const

inline

end() [1/2]

uint8_t * wpi::WritableMemoryBuffer::end ( )

inline

end() [2/2]

const uint8_t * wpi::MemoryBuffer::end ( ) const

inline

GetBuffer() [1/2]

std::span< uint8_t > wpi::WritableMemoryBuffer::GetBuffer ( )

inline

GetBuffer() [2/2]

std::span< const uint8_t > wpi::MemoryBuffer::GetBuffer ( ) const

inline

GetCharBuffer()

std::span< char > wpi::WritableMemoryBuffer::GetCharBuffer ( ) const

inline

GetFile()

static std::unique_ptr< WritableMemoryBuffer > wpi::WritableMemoryBuffer::GetFile ( std::string_view filename, std::error_code & ec, int64_t fileSize = -1 )

static

GetFileSlice()

static std::unique_ptr< WritableMemoryBuffer > wpi::WritableMemoryBuffer::GetFileSlice ( std::string_view filename, std::error_code & ec, uint64_t mapSize, uint64_t offset )

static

Map a subrange of the specified file as a WritableMemoryBuffer.

GetNewMemBuffer()

static std::unique_ptr< WritableMemoryBuffer > wpi::WritableMemoryBuffer::GetNewMemBuffer ( size_t size, std::string_view bufferName = "" )

static

Allocate a new zero-initialized MemoryBuffer of the specified size.

Note that the caller need not initialize the memory allocated by this method. The memory is owned by the MemoryBuffer object.

GetNewUninitMemBuffer()

static std::unique_ptr< WritableMemoryBuffer > wpi::WritableMemoryBuffer::GetNewUninitMemBuffer ( size_t size, std::string_view bufferName = "" )

static

Allocate a new MemoryBuffer of the specified size that is not initialized.

Note that the caller should initialize the memory allocated by this method. The memory is owned by the MemoryBuffer object.

size()

size_t wpi::MemoryBuffer::size ( ) const

inline

---

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

• wpi/MemoryBuffer.h