wxMemoryOutputStream Class Reference

#include </home/zeitlin/src/wx/github/interface/wx/mstream.h>

Inheritance diagram for wxMemoryOutputStream:

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Detailed Description

This class allows to use all methods taking a wxOutputStream reference to write to in-memory data.

例:

        wxMemoryOutputStream stream;
        if (!my_wxImage.SaveFile(stream))
            return;

        // now we can access the saved image bytes:
        wxStreamBuffer* theBuffer = stream.GetOutputStreamBuffer();
        unsigned char byte;
        if (theBuffer->Read(byte, 1) != 1)
            return;

        // ... do something with 'byte'...

        // remember that ~wxMemoryOutputStream will destroy the internal
        // buffer since we didn't provide our own when constructing it

Library:  wxBase

Category:  Streams

参照:

wxStreamBuffer

Public Member Functions
	wxMemoryOutputStream (void *data=NULL, size_t length=0)
	If data is NULL, then it will initialize a new empty buffer which will grow if required.
virtual	~wxMemoryOutputStream ()
	Destructor.
size_t	CopyTo (void *buffer, size_t len) const
	Allows you to transfer data from the internal buffer of wxMemoryOutputStream to an external buffer.
wxStreamBuffer *	GetOutputStreamBuffer () const
	Returns the pointer to the stream object used as an internal buffer for this stream.

List of all members.

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Constructor & Destructor Documentation

wxMemoryOutputStream::wxMemoryOutputStream	(	void *	data = NULL,
		size_t	length = 0
	)

If data is NULL, then it will initialize a new empty buffer which will grow if required.

Warning:

If the buffer is created by wxMemoryOutputStream, it will be destroyed at the destruction of the stream.

virtual wxMemoryOutputStream::~wxMemoryOutputStream

(

)

[virtual]

Destructor.

If the buffer wasn't provided by the user, it will be deleted here.

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Member Function Documentation

size_t wxMemoryOutputStream::CopyTo	(	void *	buffer,
		size_t	len
	)		const

Allows you to transfer data from the internal buffer of wxMemoryOutputStream to an external buffer.

len specifies the size of the buffer.

wxStreamBuffer* wxMemoryOutputStream::GetOutputStreamBuffer

(

)

const

Returns the pointer to the stream object used as an internal buffer for this stream.