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BonoboStreamMem

BonoboStreamMem — In-memory implementation of Bonobo::Stream interface.

Synopsis

                    BonoboStreamMem;
                    BonoboStreamMemClass;
BonoboStreamMem *   bonobo_stream_mem_construct         (BonoboStreamMem *stream_mem,
                                                         const char *buffer,
                                                         size_t size,
                                                         gboolean read_only,
                                                         gboolean resizable);
BonoboObject *      bonobo_stream_mem_create            (const char *buffer,
                                                         size_t size,
                                                         gboolean read_only,
                                                         gboolean resizable);
const char *        bonobo_stream_mem_get_buffer        (BonoboStreamMem *stream_mem);
size_t              bonobo_stream_mem_get_size          (BonoboStreamMem *stream_mem);

Object Hierarchy

  GObject
   +----BonoboObject
         +----BonoboStreamMem

Description

The BonoboStreamMem is an implementation of the IDL:Bonobo/Stream:1.0 interface. This implementation allows an in-memory buffer to be exposed as a IDL:Bonobo/Stream:1.0 to clients.

Here is a sample way of exposing a C string as an IDL:Bonobo/Stream:1.0:

Example 22. Sample BonoboStreamMem usage

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BonoboStream *make_bonobo_stream_on_string (char *string)
{
    return bonobo_stream_mem_create (string, strlen (string), TRUE, FALSE);
}


This example will make the string argument be exposed as a CORBA stream.

Details

BonoboStreamMem

typedef struct _BonoboStreamMem BonoboStreamMem;


BonoboStreamMemClass

typedef struct {
	BonoboObjectClass parent_class;

	POA_Bonobo_Stream__epv epv;

	char           *(*get_buffer) (BonoboStreamMem *stream_mem);
	size_t          (*get_size)   (BonoboStreamMem *stream_mem);
} BonoboStreamMemClass;


bonobo_stream_mem_construct ()

BonoboStreamMem *   bonobo_stream_mem_construct         (BonoboStreamMem *stream_mem,
                                                         const char *buffer,
                                                         size_t size,
                                                         gboolean read_only,
                                                         gboolean resizable);

stream_mem :

buffer :

size :

read_only :

resizable :

Returns :


bonobo_stream_mem_create ()

BonoboObject *      bonobo_stream_mem_create            (const char *buffer,
                                                         size_t size,
                                                         gboolean read_only,
                                                         gboolean resizable);

Creates a new BonoboStreamMem object.

If buffer is non-NULL, size bytes are copied from it into a new buffer. If buffer is NULL, a new buffer of size size is created and filled with zero bytes.

When data is read out of or (if read_only is FALSE) written into the returned BonoboStream object, the read() and write() operations operate on the new buffer. If resizable is TRUE, writing or seeking past the end of the buffer will cause the buffer to be expanded (with the new space zero-filled for a seek).

buffer :

The data for which a BonoboStreamMem object is to be created.

size :

The size in bytes of buffer.

read_only :

Specifies whether or not the returned BonoboStreamMem object should allow write() operations.

resizable :

Whether or not the buffer should be resized as needed.

Returns :

the constructed BonoboStream object

bonobo_stream_mem_get_buffer ()

const char *        bonobo_stream_mem_get_buffer        (BonoboStreamMem *stream_mem);

Returns the buffer associated with a BonoboStreamMem. If the stream is set to automatically resize itself, this buffer is only guaranteed to stay valid until the next write operation on the stream.

stream_mem :

a BonoboStreamMem

Returns :

a buffer containing the data written to the stream (or the data the stream was initialized with if nothing has been written).

bonobo_stream_mem_get_size ()

size_t              bonobo_stream_mem_get_size          (BonoboStreamMem *stream_mem);

Returns the size of the data associated with a BonoboStreamMem see bonobo_stream_mem_get_buffer

stream_mem :

a BonoboStreamMem

Returns :

the size.

See Also

BonoboStream

An abstract class to implement IDL:Bonobo/Streams.

IDL:Bonobo/Stream:1.0

The CORBA interface implemented .

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