Olaf Bergmann e4e2e57218 option.[hc]: new option filter implementation ...

The implementation of option filters based on coap_opt_filter_t
has changed to improve support for long option numbers. An option
filter is now a sparse field of a fixed size that can hold up to
COAP_OPT_FILTER_LONG options with a number larger than 255, and
up to COAP_OPT_FILTER_SHORT options with a number of 255 or less.

The space taken by coap_opt_filter_t is
2 * ((((COAP_OPT_FILTER_SHORT + 1) >> 1) + COAP_OPT_FILTER_LONG) + 1),
or 12 bytes with the default settings for COAP_OPT_FILTER_SHORT == 6
and COAP_OPT_FILTER_LONG == 2.

Three new functions have been added to the option filter API:
* coap_option_filter_set() to store an option number in a filter,
* coap_option_filter_get() to check if a filter contains a given
  option number, and
* coap_option_filter_unset() to remove an option number from a
  filter.

The previously existing functions coap_option_setb(), coap_option_getb(),
and coap_option_clrb() continue to work on the new option filter
unchanged but now are deprecated.

2015-06-07 12:21:58 +02:00

..

coap

option.[hc]: new option filter implementation

2015-06-07 12:21:58 +02:00