MemoryStream Class Reference

Represents an in-memory input byte stream. More...

#include <memorystream.h>

Inheritance diagram for MemoryStream:

Public Types
typedef char	Ch

Public Member Functions
	MemoryStream (const Ch *src, size_t size)
Ch	Peek () const
Ch	Take ()
size_t	Tell () const
Ch *	PutBegin ()
void	Put (Ch)
void	Flush ()
size_t	PutEnd (Ch *)
const Ch *	Peek4 () const
virtual HRESULT STDMETHODCALLTYPE	QueryInterface (_In_ REFIID riid, _COM_Outptr_ void **ppvObject)
virtual ULONG STDMETHODCALLTYPE	AddRef ()
virtual ULONG STDMETHODCALLTYPE	Release ()
virtual HRESULT STDMETHODCALLTYPE	Read (void *pv, ULONG cb, ULONG *pcbRead)
virtual HRESULT STDMETHODCALLTYPE	Write (const void *pv, ULONG cb, ULONG *pcbWritten)
virtual HRESULT STDMETHODCALLTYPE	Seek (LARGE_INTEGER dlibMove, DWORD dwOrigin, ULARGE_INTEGER *plibNewPosition)
virtual HRESULT STDMETHODCALLTYPE	SetSize (ULARGE_INTEGER libNewSize)
virtual HRESULT STDMETHODCALLTYPE	CopyTo (IStream *pstm, ULARGE_INTEGER cb, ULARGE_INTEGER *pcbRead, ULARGE_INTEGER *pcbWritten)
virtual HRESULT STDMETHODCALLTYPE	Commit (DWORD grfCommitFlags)
virtual HRESULT STDMETHODCALLTYPE	Revert ()
virtual HRESULT STDMETHODCALLTYPE	LockRegion (ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType)
virtual HRESULT STDMETHODCALLTYPE	UnlockRegion (ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType)
virtual HRESULT STDMETHODCALLTYPE	Stat (_Out_ STATSTG *, DWORD grfStatFlag)
virtual HRESULT STDMETHODCALLTYPE	Clone (_COM_Outptr_ IStream **ppstm)

Static Public Member Functions
static COMPtr< MemoryStream >	createInstance (PassRefPtr< WebCore::SharedBuffer > buffer)

Public Attributes
const Ch *	src_
	Current read position. More...
const Ch *	begin_
	Original head of the string. More...
const Ch *	end_
	End of stream. More...
size_t	size_
	Size of the stream. More...

Protected Member Functions
	MemoryStream (PassRefPtr< WebCore::SharedBuffer > buffer)
	~MemoryStream ()

Protected Attributes
RefPtr< WebCore::SharedBuffer >	m_buffer
size_t	m_pos { 0 }
ULONG	m_refCount { 0 }

Detailed Description

Represents an in-memory input byte stream.

This class is mainly for being wrapped by EncodedInputStream or AutoUTFInputStream.

It is similar to FileReadBuffer but the source is an in-memory buffer instead of a file.

Differences between MemoryStream and StringStream:

1. StringStream has encoding but MemoryStream is a byte stream.
2. MemoryStream needs size of the source buffer and the buffer don't need to be null terminated. StringStream assume null-terminated string as source.
3. MemoryStream supports Peek4() for encoding detection. StringStream is specified with an encoding so it should not have Peek4().

   Note

   implements Stream concept

Member Typedef Documentation

Ch

typedef char MemoryStream::Ch

Constructor & Destructor Documentation

MemoryStream() [1/2]

MemoryStream::MemoryStream ( const Ch *  src, size_t  size  )

inline

MemoryStream() [2/2]

MemoryStream::MemoryStream ( PassRefPtr< WebCore::SharedBuffer >  buffer )

protected

~MemoryStream()

MemoryStream::~MemoryStream ( )

protected

Member Function Documentation

AddRef()

ULONG MemoryStream::AddRef ( void  )

virtual

Clone()

HRESULT MemoryStream::Clone ( _COM_Outptr_ IStream **  ppstm )

virtual

Commit()

HRESULT MemoryStream::Commit ( DWORD  grfCommitFlags )

virtual

CopyTo()

HRESULT MemoryStream::CopyTo ( IStream *  pstm, ULARGE_INTEGER  cb, ULARGE_INTEGER *  pcbRead, ULARGE_INTEGER *  pcbWritten  )

virtual

createInstance()

COMPtr< MemoryStream > MemoryStream::createInstance ( PassRefPtr< WebCore::SharedBuffer >  buffer )

static

Flush()

void MemoryStream::Flush ( )

inline

LockRegion()

HRESULT MemoryStream::LockRegion ( ULARGE_INTEGER  libOffset, ULARGE_INTEGER  cb, DWORD  dwLockType  )

virtual

Peek()

Ch MemoryStream::Peek ( ) const

inline

Peek4()

const Ch* MemoryStream::Peek4 ( ) const

inline

Put()

void MemoryStream::Put ( Ch  )

inline

PutBegin()

Ch* MemoryStream::PutBegin ( )

inline

PutEnd()

size_t MemoryStream::PutEnd ( Ch *  )

inline

QueryInterface()

HRESULT MemoryStream::QueryInterface ( _In_ REFIID  riid, _COM_Outptr_ void **  ppvObject  )

virtual

Read()

HRESULT MemoryStream::Read ( void *  pv, ULONG  cb, ULONG *  pcbRead  )

virtual

Release()

ULONG MemoryStream::Release ( void  )

virtual

Revert()

HRESULT MemoryStream::Revert ( )

virtual

Seek()

HRESULT MemoryStream::Seek ( LARGE_INTEGER  dlibMove, DWORD  dwOrigin, ULARGE_INTEGER *  plibNewPosition  )

virtual

SetSize()

HRESULT MemoryStream::SetSize ( ULARGE_INTEGER  libNewSize )

virtual

Stat()

HRESULT MemoryStream::Stat ( _Out_ STATSTG *  pstatstg, DWORD  grfStatFlag  )

virtual

Take()

Ch MemoryStream::Take ( )

inline

Tell()

size_t MemoryStream::Tell ( ) const

inline

UnlockRegion()

HRESULT MemoryStream::UnlockRegion ( ULARGE_INTEGER  libOffset, ULARGE_INTEGER  cb, DWORD  dwLockType  )

virtual

Write()

HRESULT MemoryStream::Write ( const void *  pv, ULONG  cb, ULONG *  pcbWritten  )

virtual

Member Data Documentation

begin_

const Ch* MemoryStream::begin_

Original head of the string.

end_

const Ch* MemoryStream::end_

End of stream.

m_buffer

RefPtr<WebCore::SharedBuffer> MemoryStream::m_buffer

protected

m_pos

size_t MemoryStream::m_pos { 0 }

protected

m_refCount

ULONG MemoryStream::m_refCount { 0 }

protected

size_

size_t MemoryStream::size_

Size of the stream.

src_

const Ch* MemoryStream::src_

Current read position.

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

• Source/ThirdParty/ANGLE/src/tests/third_party/rapidjson/include/rapidjson/memorystream.h
• Source/WebKit/win/MemoryStream.cpp