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

Macro Definition Documentation

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)

evalutes 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