InputStream Class Reference

Interface for private data of input streams. More...

#include <InputStream.h>

Inheritance diagram for InputStream:

Collaboration diagram for InputStream:

Public Member Methods
virtual int64	peek (ExceptionSink *xsink)=0
	Peeks the next byte from the input stream. More...
DLLLOCAL QoreValue	peekHelper (ExceptionSink *xsink)
	Helper method that checks that the current thread is the same as when the instance was created, calls peek() and wraps the result to Qore's `int` value. More...
virtual int64	read (void *ptr, int64 limit, ExceptionSink *xsink)=0
	Reads up to `limit` bytes from the input stream. More...
DLLLOCAL BinaryNode *	readHelper (int64 limit, ExceptionSink *xsink)
	Helper method that checks that the current thread is the same as when the instance was created, calls read() and wraps the read data to Qore's `binary` value. More...
Public Member Methods inherited from StreamBase
DLLLOCAL bool	check (ExceptionSink *xsink)
	Checks that the current thread is the same as when the instance was created or assigned via unassignThread() and reassignThread() and that the stream has not yet been closed. More...
virtual DLLLOCAL const char *	getName ()=0
	Returns the name of the class. More...
DLLLOCAL int	getThreadId ()
	Get currently assigned thread id.
DLLLOCAL void	reassignThread (ExceptionSink *xsink)
	Reassigns current thread as thread used for stream manipulation, see check() More...
DLLLOCAL void	unassignThread (ExceptionSink *xsink)
	Unassigns current thread as thread used for stream manipulation, see check() More...
Public Member Methods inherited from AbstractPrivateData
virtual DLLLOCAL void	deref (ExceptionSink *xsink)
	decrements the reference count of the object More...
virtual DLLLOCAL void	deref ()
	decrements the reference count of the object without the possibility of throwing a Qore-language exception
DLLLOCAL void	ref ()
	increments the reference count of the object More...
Public Member Methods inherited from QoreReferenceCounter
DLLEXPORT	QoreReferenceCounter ()
	creates the reference counter object
DLLEXPORT	QoreReferenceCounter (const QoreReferenceCounter &old)
	creates a new object with a reference count of 1 More...
DLLEXPORT	~QoreReferenceCounter ()
	destroys the reference counter object
DLLEXPORT bool	is_unique () const
	returns true if the reference count is 1 More...
DLLEXPORT int	reference_count () const
	gets the reference count More...
DLLEXPORT bool	ROdereference () const
	atomically decrements the reference count More...
DLLEXPORT void	ROreference () const
	atomically increments the reference count

Private Member Methods
	InputStream ()=default
	Constructor.
Private Member Methods inherited from StreamBase
	StreamBase ()
	Constructor.
Private Member Methods inherited from AbstractPrivateData
virtual DLLLOCAL	~AbstractPrivateData ()
	as these objects are reference counted, the destructor should be called only when the reference count = 0 and not manually

Detailed Description

Interface for private data of input streams.

Methods in this interface serve as low-level API for using input streams from C++ code.

Member Function Documentation

peek()

virtual int64 InputStream::peek ( ExceptionSink *  xsink )

pure virtual

Peeks the next byte from the input stream.

Parameters

xsink

the exception sink

Returns

the next byte available to be read, -1 indicates end of the stream, -2 indicates an error

Implemented in PipeInputStream, InputStreamWrapper, BinaryInputStream, StringInputStream, and FileInputStream.

peekHelper()

DLLLOCAL QoreValue InputStream::peekHelper ( ExceptionSink *  xsink )

inline

Helper method that checks that the current thread is the same as when the instance was created, calls peek() and wraps the result to Qore's `int` value.

Parameters

xsink

the exception sink

Returns

the `int` wrapping the result or `NOTHING` if the end of the stream has been reached

read()

virtual int64 InputStream::read ( void *  ptr, int64  limit, ExceptionSink *  xsink  )

pure virtual

Reads up to `limit` bytes from the input stream.

Parameters

ptr	the destination buffer to read data into
limit	the maximum number of bytes to read, must be > 0
xsink	the exception sink

Returns

the number of bytes read, 0 indicates the end of the stream

Implemented in PipeInputStream, FileInputStream, BinaryInputStream, InputStreamWrapper, and StringInputStream.

readHelper()

DLLLOCAL BinaryNode* InputStream::readHelper ( int64  limit, ExceptionSink *  xsink  )

inline

Helper method that checks that the current thread is the same as when the instance was created, calls read() and wraps the read data to Qore's `binary` value.

Parameters

limit	the maximum number of bytes to read
xsink	the exception sink

Returns

the `binary` wrapping the read data or `NOTHING` if the end of the stream has been reached

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

• /export/home2/dnichols/src/el7/qore/git/qore/include/qore/InputStream.h