Commit 830a9583 authored by Gerd Hoffmann's avatar Gerd Hoffmann
Browse files

buffer: add buffer_move 



Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
Reviewed-by: default avatarPeter Lieven <pl@kamp.de>
Reviewed-by: default avatarDaniel P. Berrange <berrange@redhat.com>
Message-id: 1446203414-4013-5-git-send-email-kraxel@redhat.com
parent 4d1eb5fd

include/qemu/buffer.h

+10 −0
Original line number Diff line number Diff line
@@ -137,4 +137,14 @@ gboolean buffer_empty(Buffer *buffer); 
 */

void buffer_move_empty(Buffer *to, Buffer *from);



/**

 * buffer_move:

 * @to: destination buffer object

 * @from: source buffer object

 *

 * Moves buffer, copying data (unless 'to' buffer happens to be empty).

 * 'from' buffer is empty and zero-sized on return.

 */

void buffer_move(Buffer *to, Buffer *from);



#endif /* QEMU_BUFFER_H__ */

util/buffer.c

+16 −0
Original line number Diff line number Diff line
@@ -91,3 +91,19 @@ void buffer_move_empty(Buffer *to, Buffer *from) 
    from->capacity = 0;

    from->buffer = NULL;

}



void buffer_move(Buffer *to, Buffer *from)

{

    if (to->offset == 0) {

        buffer_move_empty(to, from);

        return;

    }



    buffer_reserve(to, from->offset);

    buffer_append(to, from->buffer, from->offset);



    g_free(from->buffer);

    from->offset = 0;

    from->capacity = 0;

    from->buffer = NULL;

}