Re: [PATCH 1/5] lib/uuid: Add uuid conversion to 16 bit uuid

[Grzegorz Kolodziejczyk <grzegorz.kolodziejczyk@tieto.com>]

ping

On 2 April 2015 at 13:15, Grzegorz Kolodziejczyk
<grzegorz.kolodziejczyk@tieto.com> wrote:
> This patch allows to cut bluetooth base if it's bluetooth base uuid.
> If the uuid is bluetooth base, src uuid can be converted, otherwise
> error is returned.
> ---
>  lib/uuid.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
>  lib/uuid.h |  1 +
>  2 files changed, 45 insertions(+)
>
> diff --git a/lib/uuid.c b/lib/uuid.c
> index fd61968..d2ad66d 100644
> --- a/lib/uuid.c
> +++ b/lib/uuid.c
> @@ -73,6 +73,34 @@ static void bt_uuid32_to_uuid128(const bt_uuid_t *src, bt_uuid_t *dst)
>         memcpy(&dst->value.u128.data[BASE_UUID32_OFFSET], &be32, sizeof(be32));
>  }
>
> +static int bt_uuid128_to_uuid16(const bt_uuid_t *src, bt_uuid_t *dst)
> +{
> +       if (memcmp(&src->value.u128.data, &bluetooth_base_uuid.data, 2) ||
> +                                       memcmp(&src->value.u128.data[4],
> +                                       &bluetooth_base_uuid.data[4], 12))
> +               return -EINVAL;
> +
> +       dst->type = BT_UUID16;
> +
> +       memcpy(&dst->value.u16, &src->value.u128.data[BASE_UUID16_OFFSET],
> +                                                       sizeof(uint16_t));
> +
> +       return 0;
> +}
> +
> +static int bt_uuid32_to_uuid16(const bt_uuid_t *src, bt_uuid_t *dst)
> +{
> +       /* Bluetooth base have zeroized first two bytes */
> +       if (src->value.u32 & 0xffff0000)
> +               return -EINVAL;
> +
> +       dst->type = BT_UUID16;
> +
> +       dst->value.u16 = src->value.u32 & 0x0000ffff;
> +
> +       return 0;
> +}
> +
>  void bt_uuid_to_uuid128(const bt_uuid_t *src, bt_uuid_t *dst)
>  {
>         switch (src->type) {
> @@ -91,6 +119,22 @@ void bt_uuid_to_uuid128(const bt_uuid_t *src, bt_uuid_t *dst)
>         }
>  }
>
> +int bt_uuid_to_uuid16(const bt_uuid_t *src, bt_uuid_t *dst)
> +{
> +       switch (src->type) {
> +       case BT_UUID128:
> +               return bt_uuid128_to_uuid16(src, dst);
> +       case BT_UUID32:
> +               return bt_uuid32_to_uuid16(src, dst);
> +       case BT_UUID16:
> +               *dst = *src;
> +               return 0;
> +       case BT_UUID_UNSPEC:
> +       default:
> +               return -EINVAL;
> +       }
> +}
> +
>  static int bt_uuid128_cmp(const bt_uuid_t *u1, const bt_uuid_t *u2)
>  {
>         return memcmp(&u1->value.u128, &u2->value.u128, sizeof(uint128_t));
> diff --git a/lib/uuid.h b/lib/uuid.h
> index 2dcfe9e..26f8532 100644
> --- a/lib/uuid.h
> +++ b/lib/uuid.h
> @@ -161,6 +161,7 @@ int bt_uuid128_create(bt_uuid_t *btuuid, uint128_t value);
>
>  int bt_uuid_cmp(const bt_uuid_t *uuid1, const bt_uuid_t *uuid2);
>  void bt_uuid_to_uuid128(const bt_uuid_t *src, bt_uuid_t *dst);
> +int bt_uuid_to_uuid16(const bt_uuid_t *src, bt_uuid_t *dst);
>
>  #define MAX_LEN_UUID_STR 37
>
> --
> 2.1.0
>