CeresEngine::BufferedInputStream Class Reference

A filtered InputStream that caches read and write operations to it's underlying InputStream. More...

#include <CeresEngine/Foundation/IO/Stream.Buffered.hpp>

Inheritance diagram for CeresEngine::BufferedInputStream:

Public Member Functions
	BufferedInputStream (InputStream &&inputStream, size_t bufferSize=1024)
	Creates a new buffer data stream.
	BufferedInputStream (const BufferedInputStream &)=delete
	BufferedInputStream (BufferedInputStream &&) noexcept
	~BufferedInputStream () final
	Destroys the buffered data stream.
void	seek (std::streamsize position, Seek mode=Seek::Start) final
	Changes the position of the data stream.
size_t	tell () final
	Gets the absolute stream position, in bytes.
size_t	read (void *data, size_t n) final
	Reads data from the data stream to a buffer of raw memory data with length n.
bool	invalidate () final
	In the stream is buffered, invalidates any buffered read data from the stream.
Public Member Functions inherited from CeresEngine::FilteredInputStream
	FilteredInputStream (InputStream &&inputStream)
	Creates a new filtered data stream.
	FilteredInputStream (FilteredInputStream &&) noexcept=default
	~FilteredInputStream () override=default
InputStream &	getInputStream () noexcept
	The data stream being filtered.
const InputStream &	getInputStream () const noexcept
	The data stream being filtered.
bool	isSeekable (const Seek mode=Seek::Start) const noexcept override
	Checks if the stream is seekable.
void	seek (const std::streamsize position, const Seek mode=Seek::Start) override
	Changes the position of the data stream.
bool	isTellable () const noexcept override
	Checks if the stream knows it's current absolute position.
size_t	tell () override
	Gets the absolute stream position, in bytes.
bool	isSizeKnown () const noexcept override
	Checks if the stream knows the size of the data.
size_t	size () override
	Gets the number of bytes available on the stream.
bool	isReadable () const noexcept override
	Checks if the stream is readable.
size_t	read (void *data, const size_t n) override
	Reads data from the data stream to a buffer of raw memory data with length n.
bool	invalidate () override
	In the stream is buffered, invalidates any buffered read data from the stream.
Public Member Functions inherited from CeresEngine::IInputStream
template<typename T >
size_t	read (const MemoryView< T > &memoryView)
	Reads data from the strea into a memory view.
template<typename T >
size_t	read (const StridedMemoryView< T > &memoryView)
	Reads data from the stream into a strided memory view.
Optional< String >	readString ()
	Reads data from the buffer as a C++ String.
template<typename T > requires std::is_trivially_copyable_v<T>
Optional< T >	read ()
	Reads a trivially copyable obhect from the stream.
Public Member Functions inherited from CeresEngine::IStream
	IStream ()=default
	IStream (const IStream &) noexcept=delete
IStream &	operator= (const IStream &) noexcept=delete
	IStream (IStream &&) noexcept=default
IStream &	operator= (IStream &&) noexcept=default
virtual	~IStream () noexcept=default
void	skip (const size_t n)
	Skips n bytes from the data stream.

Private Types
using	super = FilteredInputStream

Private Member Functions
void	invalidateReadBuffer ()

Private Attributes
ByteMemoryView	mBuffer
ByteMemoryView	mBufferData

Additional Inherited Members
Public Types inherited from CeresEngine::IStream
enum class	Seek { Start = SEEK_SET , Current = SEEK_CUR , End = SEEK_END }
	An enumeration that describes how a data stream should be seeked. More...
Protected Attributes inherited from CeresEngine::FilteredInputStream
InputStream	mInputStream
	The data stream being filtered.

Detailed Description

A filtered InputStream that caches read and write operations to it's underlying InputStream.

Member Typedef Documentation

super

using CeresEngine::BufferedInputStream::super = FilteredInputStream

private

Constructor & Destructor Documentation

BufferedInputStream() [1/3]

CeresEngine::BufferedInputStream::BufferedInputStream ( InputStream &&  inputStream, size_t  bufferSize = 1024  )

explicit

Creates a new buffer data stream.

Parameters

bufferSize

Size of the memory chunk in bytes.

BufferedInputStream() [2/3]

CeresEngine::BufferedInputStream::BufferedInputStream ( const BufferedInputStream &  )

delete

BufferedInputStream() [3/3]

CeresEngine::BufferedInputStream::BufferedInputStream ( BufferedInputStream &&  )

noexcept

~BufferedInputStream()

CeresEngine::BufferedInputStream::~BufferedInputStream ( )

final

Destroys the buffered data stream.

Member Function Documentation

invalidate()

bool CeresEngine::BufferedInputStream::invalidate ( )

finalvirtual

In the stream is buffered, invalidates any buffered read data from the stream.

Non-buffered streams are free to ignore this method.

Returns

True if the invalidation finished successfully; false otherwise.

Reimplemented from CeresEngine::IInputStream.

invalidateReadBuffer()

void CeresEngine::BufferedInputStream::invalidateReadBuffer ( )

private

read()

size_t CeresEngine::BufferedInputStream::read ( void *  data, size_t  n  )

finalvirtual

Reads data from the data stream to a buffer of raw memory data with length n.

Note

This method is only callable if isReadable() returns true.

Parameters

data	The memory location to which read data should be placed.
n	The maximum number of bytes to be read from the data stream.

Returns

The number of bytes actually read. Can be smaller than n. If 0, indicates that the stream has ended.

Reimplemented from CeresEngine::IInputStream.

seek()

void CeresEngine::BufferedInputStream::seek ( std::streamsize  position, Seek  mode = Seek::Start  )

finalvirtual

Changes the position of the data stream.

Note

This method is only callable if isSeekable() returns true.

Parameters

position	The position to set the data stream to.
mode	The mode to change the data stream position.

Reimplemented from CeresEngine::IStream.

tell()

size_t CeresEngine::BufferedInputStream::tell ( )

finalvirtual

Gets the absolute stream position, in bytes.

Note

This method is only callable if isTellable() returns true.

Reimplemented from CeresEngine::IStream.

Member Data Documentation

mBuffer

ByteMemoryView CeresEngine::BufferedInputStream::mBuffer

private

mBufferData

ByteMemoryView CeresEngine::BufferedInputStream::mBufferData

private

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

• /Users/Rogiel/Developer/CeresEngine/Engine/Sources/CeresEngine/Foundation/IO/Stream.Buffered.hpp