[Qemu-devel] Re: [PATCH 4/5] atapi: GESN: Add enums for commonly-used field types

[Kevin Wolf <kwolf@redhat.com>]

Am 08.04.2011 09:15, schrieb Amit Shah:
> Instead of using magic numbers, use enums that are more descriptive of
> the fields being used.
> 
> Signed-off-by: Amit Shah <amit.shah@redhat.com>
> ---
>  hw/ide/core.c |   11 +++++++++--
>  1 files changed, 9 insertions(+), 2 deletions(-)
> 
> diff --git a/hw/ide/core.c b/hw/ide/core.c
> index 730587e..cdc2c56 100644
> --- a/hw/ide/core.c
> +++ b/hw/ide/core.c
> @@ -1118,12 +1118,19 @@ static void handle_get_event_status_notification(IDEState *s,
>                                                   uint8_t *buf,
>                                                   const uint8_t *packet)
>  {
> +    enum cdb {
> +        polled = 1,
> +        request = 4,
> +        allocation_length_msb = 7,
> +        allocation_length_lsb = 8,
> +        control = 9,
> +    };

Wouldn't it be nicer to make this a struct and just cast packet to a
pointer to this struct? At first I didn't realize that this should be
field offsets and I find something like packet + allocation_length_msb
rather confusing.

Kevin