Hi Grzegorz,
On Fri, Mar 27, 2015 at 5:39 PM, Grzegorz Kolodziejczyk
<grzegorz.kolodziejczyk@xxxxxxxxx> 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 4f34b17..15fbd66 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);
I would like to see how this is going to be used, do you have patches
that make use of it?
> #define MAX_LEN_UUID_STR 37
>
> --
> 2.1.0
>
> --
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--
Luiz Augusto von Dentz
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