Jon Shallow b4fc68c554 include/coap/*.h: Remove cast-qual compiler warnings ...

Commented out coap_opt_block_set_m() as it is not used anywhere, and needs
to get rewritten if needed.

Removed / changed references to coap_opt_const_value()

Created a new struct coap_str_const_t to handle const parameters
Add in 2 new functions to create / delete the new string type
coap_new_str_const()
coap_delete_str_const()
Added in coap_make_str_const() to help create the necessary string equivalents
of the ascii test string.  Note that the byte array must be in the
local scope.

Make coap_string_equal() a macro to handle differing string types

Made uri_path a pointer in coap_resource_t
Made name and value a pointer in coap_attribute_t

Reasoning behind this was triggerred by test t_wellknown3() creating a
number of resources, all using the same string buffer, so they all ended up
with the same uri-path (last update to uri-path).  In the days of hashing
uri-path for the lookup would have worked, but the wrong uri-path
presented from the resource.  Now we always allocate uri-path if
application does not want it freed off - and always free it off at time
or resource removal.  The same is also true for coap_add_attr().

Updated coap_resource_init(), coap_add_attr() and coap_find_attr() to
pass in string parameters, rather than use a pointer to data and a length.

Where appropriate

Replace 'unsigned char' with 'const uint8_t'
Replace 'str' with 'coap_str_const_t'
Replace 'str' with 'coap_string_t'
Prefix with 'const' some type casts
Remove 'const' prefix from some type casts

2018-05-25 16:37:05 +01:00

..

coap

include/coap/*.h: Remove cast-qual compiler warnings

2018-05-25 16:37:05 +01:00