[vlc-devel] [PATCH 1/3] vlc_common.h: add helpers to get the upper rounded value of integer divisions

[Steve Lhomme]

On Fri, Mar 17, 2017 at 9:36 AM, Steve Lhomme <robux4 at videolabs.io> wrote:
> ---
>  include/vlc_common.h | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/include/vlc_common.h b/include/vlc_common.h
> index 6a75753dbf..b72dbfe689 100644
> --- a/include/vlc_common.h
> +++ b/include/vlc_common.h
> @@ -507,6 +507,11 @@ struct vlc_common_members
>  /* clip v in [min, max] */
>  #define VLC_CLIP(v, min, max)    __MIN(__MAX((v), (min)), (max))
>
> +/* upper rounded value of the integer division */
> +#define VLC_UPPER_DIV(v, div)     (((v) + (div) - 1) / (div))
> +/* upper modulo value of the integer */
> +#define VLC_UPPER_MODULO(v, mod)  (VLC_UPPER_DIV(v, mod) * mod)

Maybe (v + (v % mod)) is more efficient but for now I kept the same
algorithm found in some parts of the code.

> +
>  VLC_USED
>  static inline int64_t GCD ( int64_t a, int64_t b )
>  {
> --
> 2.11.1
>