Version: 2.9.4
Public Member Functions
wxMemoryOutputStream Class Reference

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

Inheritance diagram for wxMemoryOutputStream:

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.
wxStreamBufferGetOutputStreamBuffer () const
 Returns the pointer to the stream object used as an internal buffer for this stream.

List of all members.


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.


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.

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