Re: [chrony-dev] [PATCH] UTI_DoubleToTimeval() - fix rounding of negative numbers

[Miroslav Lichvar <mlichvar@xxxxxxxxxx>]

On Thu, Jul 23, 2015 at 11:59:31PM +1200, Bryan Christianson wrote:

Applied, thanks.

> ---
>  util.c | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/util.c b/util.c
> index 0add5df..8483626 100644
> --- a/util.c
> +++ b/util.c
> @@ -46,11 +46,13 @@ UTI_TimevalToDouble(struct timeval *a, double *b)
>  INLINE_STATIC void
>  UTI_DoubleToTimeval(double a, struct timeval *b)
>  {
> -  long int_part, frac_part;
> +  long int_part;
> +  double frac_part;
>    int_part = (long)(a);
> -  frac_part = (long)(0.5 + 1.0e6 * (a - (double)(int_part)));
> +  frac_part = 1.0e6 * (a - (double)(int_part));
> +  frac_part = frac_part > 0 ? frac_part + 0.5 : frac_part - 0.5;
>    b->tv_sec = int_part;
> -  b->tv_usec = frac_part;
> +  b->tv_usec = (long)frac_part;
>    UTI_NormaliseTimeval(b);
>  }

-- 
Miroslav Lichvar

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