[Libguestfs] [PATCH nbdkit v2] common: isaligned: Use a macro instead of relying on implicit truncation.

[Eric Blake]

On 9/17/18 4:41 PM, Nir Soffer wrote:

> The FreeBSD version:
> 
> #define IS_ALIGNED <http://fxr.watson.org/fxr/ident?i=IS_ALIGNED>(n
> <http://fxr.watson.org/fxr/ident?i=n>,align)     (!((uint32_t)(n
> <http://fxr.watson.org/fxr/ident?i=n>) & (align - 1)))
> 
> http://fxr.watson.org/fxr/source/contrib/ncsw/inc/ncsw_ext.h#L182

Which truncates to 32 bits.  But that's what we're trying to get rid of 
- by moving to a macro that lets us do full 64-bit alignment if needed.

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org