tree f6fa039d3c9411ccaadf729104e9e79a2d84756d
parent 42e2aa56372291d35345fcec85d5da2004c8b57c
author Dr. David Alan Gilbert <dgilbert@redhat.com> 1446747035 +0000
committer Juan Quintela <quintela@redhat.com> 1447163508 +0100

Add qemu_get_buffer_in_place to avoid copies some of the time

qemu_get_buffer always copies the data it reads to a users buffer,
however in many cases the file buffer inside qemu_file could be given
back to the caller, avoiding the copy.  This isn't always possible
depending on the size and alignment of the data.

Thus 'qemu_get_buffer_in_place' either copies the data to a supplied
buffer or updates a pointer to the internal buffer if convenient.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>