tree 9b15c86f85e8141f3a20cbf9f52ea21a0719e598
parent 7a65c8cc315c76bde6d692845c12e7ba06f44f89
author Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> 1328621244 +0000
committer Kevin Wolf <kwolf@redhat.com> 1328800670 +0100

cutils: extract buffer_is_zero() from qemu-img.c

The qemu-img.c:is_not_zero() function checks if a buffer contains all
zeroes.  This function will come in handy for zero-detection in the
block layer, so clean it up and move it to cutils.c.

Note that the function now returns true if the buffer is all zeroes.
This avoids the double-negatives (i.e. !is_not_zero()) that the old
function can cause in callers.

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>