lwm2m_path.h File Reference

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Macros
#define	LWM2M_PATH(...)
	Generate LwM2M string paths using numeric components. More...
#define	LWM2M_PATH_VA_NUM_ARGS(...)    LWM2M_PATH_VA_NUM_ARGS_IMPL(__VA_ARGS__, 5, 4, 3, 2, 1)
#define	LWM2M_PATH_VA_NUM_ARGS_IMPL(_1, _2, _3, _4, N, ...)   N
#define	LWM2M_PATH1(_x)   #_x
#define	LWM2M_PATH2(_x, _y)   #_x "/" #_y
#define	LWM2M_PATH3(_x, _y, _z)   #_x "/" #_y "/" #_z
#define	LWM2M_PATH4(_a, _x, _y, _z)   #_a "/" #_x "/" #_y "/" #_z
#define	LWM2M_PATH_MACRO(_1, _2, _3, _4, NAME, ...)   NAME
#define	LWM2M_OBJ(...)    GET_OBJ_MACRO(__VA_ARGS__, LWM2M_OBJ4, LWM2M_OBJ3, LWM2M_OBJ2, LWM2M_OBJ1)(__VA_ARGS__)
	Initialize LwM2M object structure. More...
#define	GET_OBJ_MACRO(_1, _2, _3, _4, NAME, ...)   NAME
#define	LWM2M_OBJ1(oi)   (struct lwm2m_obj_path) {.obj_id = oi, .level = 1}
#define	LWM2M_OBJ2(oi, oii)   (struct lwm2m_obj_path) {.obj_id = oi, .obj_inst_id = oii, .level = 2}
#define	LWM2M_OBJ3(oi, oii, ri)
#define	LWM2M_OBJ4(oi, oii, ri, rii)

Macro Definition Documentation

GET_OBJ_MACRO

#define GET_OBJ_MACRO	(		_1,
			_2,
			_3,
			_4,
			NAME,
			...
	)		NAME

LWM2M_OBJ

#define LWM2M_OBJ

(

...

)

GET_OBJ_MACRO(__VA_ARGS__, LWM2M_OBJ4, LWM2M_OBJ3, LWM2M_OBJ2, LWM2M_OBJ1)(__VA_ARGS__)

Initialize LwM2M object structure.

Accepts at least one and up to four arguments. Fill up lwm2m_obj_path structure and sets the level. For example:

struct lwm2m_obj_path p = LWM2M_OBJ(MY_OBJ, 0, RESOURCE);

Can also be used in place of function argument to return the structure allocated from stack

lwm2m_notify_observer_path(&LWM2M_OBJ(MY_OBJ, inst_id, RESOURCE));

LWM2M_OBJ1

#define LWM2M_OBJ1

(

oi

)

(struct lwm2m_obj_path) {.obj_id = oi, .level = 1}

LWM2M_OBJ2

#define LWM2M_OBJ2	(		oi,
			oii
	)		(struct lwm2m_obj_path) {.obj_id = oi, .obj_inst_id = oii, .level = 2}

LWM2M_OBJ3

#define LWM2M_OBJ3	(		oi,
			oii,
			ri
	)

Value:

        (struct lwm2m_obj_path) \
        {.obj_id = oi, .obj_inst_id = oii, .res_id = ri, .level = 3}

LWM2M_OBJ4

#define LWM2M_OBJ4	(		oi,
			oii,
			ri,
			rii
	)

Value:

        (struct lwm2m_obj_path) \
        {.obj_id = oi, .obj_inst_id = oii, .res_id = ri, .res_inst_id = rii, .level = 4}

LWM2M_PATH

#define LWM2M_PATH

(

...

)

Value:

        LWM2M_PATH_MACRO(__VA_ARGS__, LWM2M_PATH4, LWM2M_PATH3, \
                         LWM2M_PATH2, LWM2M_PATH1)(__VA_ARGS__)

Generate LwM2M string paths using numeric components.

Accepts at least one and up to four arguments. Each argument will be stringified by the pre-processor, so calling this with non-literals will likely not do what you want. For example,

 #define MY_OBJ_ID 3
 LWM2M_PATH(MY_OBJ_ID, 0, 1)

would evaluate to "3/0/1", while

int x = 3; LWM2M_PATH(x, 0, 1)

evaluates to "x/0/1".

LWM2M_PATH1

#define LWM2M_PATH1

(

_x

)

#_x

LWM2M_PATH2

#define LWM2M_PATH2	(		_x,
			_y
	)		#_x "/" #_y

LWM2M_PATH3

#define LWM2M_PATH3	(		_x,
			_y,
			_z
	)		#_x "/" #_y "/" #_z

LWM2M_PATH4

#define LWM2M_PATH4	(		_a,
			_x,
			_y,
			_z
	)		#_a "/" #_x "/" #_y "/" #_z

LWM2M_PATH_MACRO

#define LWM2M_PATH_MACRO	(		_1,
			_2,
			_3,
			_4,
			NAME,
			...
	)		NAME

LWM2M_PATH_VA_NUM_ARGS

#define LWM2M_PATH_VA_NUM_ARGS

(

...

)

LWM2M_PATH_VA_NUM_ARGS_IMPL(__VA_ARGS__, 5, 4, 3, 2, 1)

LWM2M_PATH_VA_NUM_ARGS_IMPL

#define LWM2M_PATH_VA_NUM_ARGS_IMPL	(		_1,
			_2,
			_3,
			_4,
			N,
			...
	)		N