Aws::Crt::Io::InputStream Class Reference

#include <Stream.h>

Inheritance diagram for Aws::Crt::Io::InputStream:

Public Member Functions
virtual	~InputStream ()
	InputStream (const InputStream &)=delete
InputStream &	operator= (const InputStream &)=delete
	InputStream (InputStream &&)=delete
InputStream &	operator= (InputStream &&)=delete
	operator bool () const noexcept
virtual bool	IsValid () const noexcept=0
bool	Read (ByteBuf &dest)
bool	Seek (int64_t offset, StreamSeekBasis seekBasis)
bool	GetStatus (StreamStatus &status)
bool	GetLength (int64_t &length)

Protected Member Functions
	InputStream (Aws::Crt::Allocator *allocator=ApiAllocator())
virtual bool	ReadImpl (ByteBuf &buffer) noexcept=0
virtual bool	ReadSomeImpl (ByteBuf &buffer) noexcept=0
virtual StreamStatus	GetStatusImpl () const noexcept=0
virtual int64_t	GetLengthImpl () const noexcept=0
virtual bool	SeekImpl (int64_t offset, StreamSeekBasis seekBasis) noexcept=0
virtual int64_t	PeekImpl () const noexcept=0
Protected Member Functions inherited from Aws::Crt::RefCounted< InputStream >
	RefCounted ()
	~RefCounted ()
void	AcquireRef ()
void	ReleaseRef ()

Protected Attributes
Allocator *	m_allocator
aws_input_stream	m_underlying_stream

Constructor & Destructor Documentation

~InputStream()

Aws::Crt::Io::InputStream::~InputStream ( )

virtual

InputStream() [1/3]

Aws::Crt::Io::InputStream::InputStream ( const InputStream &  )

delete

InputStream() [2/3]

Aws::Crt::Io::InputStream::InputStream ( InputStream &&  )

delete

InputStream() [3/3]

Aws::Crt::Io::InputStream::InputStream ( Aws::Crt::Allocator *  allocator = ApiAllocator() )

protected

Member Function Documentation

GetLength()

bool Aws::Crt::Io::InputStream::GetLength ( int64_t &  length )

inline

Gets the stream's length. Some streams may not be able to answer this.

Parameters

length

output parameter for the length of the stream

Returns

success/failure

GetLengthImpl()

virtual int64_t Aws::Crt::Io::InputStream::GetLengthImpl ( ) const

protectedpure virtualnoexcept

Returns

the total length of the available data for the stream.

-1 if not available.

Implemented in Aws::Crt::Io::StdIOStreamInputStream.

GetStatus()

bool Aws::Crt::Io::InputStream::GetStatus ( StreamStatus &  status )

inline

Gets the stream's current status

Parameters

status

output parameter for the stream's status

Returns

success/failure

GetStatusImpl()

virtual StreamStatus Aws::Crt::Io::InputStream::GetStatusImpl ( ) const

protectedpure virtualnoexcept

Returns

the current status of the stream.

Implemented in Aws::Crt::Io::StdIOStreamInputStream.

IsValid()

virtual bool Aws::Crt::Io::InputStream::IsValid ( ) const

pure virtualnoexcept

Returns

true/false if this object is in a valid state

Implemented in Aws::Crt::Io::StdIOStreamInputStream.

operator bool()

Aws::Crt::Io::InputStream::operator bool ( ) const

inlineexplicitnoexcept

operator=() [1/2]

InputStream& Aws::Crt::Io::InputStream::operator= ( const InputStream &  )

delete

operator=() [2/2]

InputStream& Aws::Crt::Io::InputStream::operator= ( InputStream &&  )

delete

PeekImpl()

virtual int64_t Aws::Crt::Io::InputStream::PeekImpl ( ) const

protectedpure virtualnoexcept

Peeks the stream

Essentially calls peek on the underlying istream

Returns

return value of the underlying istream::peek

Implemented in Aws::Crt::Io::StdIOStreamInputStream.

Read()

bool Aws::Crt::Io::InputStream::Read ( ByteBuf &  dest )

inline

Reads data from the stream into a buffer

Parameters

dest	buffer to add the read data into

Returns

success/failure

ReadImpl()

virtual bool Aws::Crt::Io::InputStream::ReadImpl ( ByteBuf &  buffer )

protectedpure virtualnoexcept

Implemented in Aws::Crt::Io::StdIOStreamInputStream.

ReadSomeImpl()

virtual bool Aws::Crt::Io::InputStream::ReadSomeImpl ( ByteBuf &  buffer )

protectedpure virtualnoexcept

Implemented in Aws::Crt::Io::StdIOStreamInputStream.

Seek()

bool Aws::Crt::Io::InputStream::Seek ( int64_t  offset, StreamSeekBasis  seekBasis  )

inline

Moves the head of the stream to a new location

Parameters

offset	how far to move, in bytes
seekBasis	what direction to move the head of stream

Returns

success/failure

SeekImpl()

virtual bool Aws::Crt::Io::InputStream::SeekImpl ( int64_t  offset, StreamSeekBasis  seekBasis  )

protectedpure virtualnoexcept

Seek's the stream to seekBasis based offset bytes.

It is expected, that if seeking to the beginning of a stream, all error's are cleared if possible.

Returns

true on success, false otherwise. You SHOULD raise an error via aws_raise_error() if a failure occurs.

Member Data Documentation

m_allocator

Allocator* Aws::Crt::Io::InputStream::m_allocator

protected

m_underlying_stream

aws_input_stream Aws::Crt::Io::InputStream::m_underlying_stream

protected

---

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

• crt/aws-crt-cpp/include/aws/crt/io/Stream.h
• crt/aws-crt-cpp/source/io/Stream.cpp