lwm2m_path.h

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/*
 * Copyright (c) 2020 Endian Technologies AB
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef ZEPHYR_INCLUDE_NET_LWM2M_PATH_H_
#define ZEPHYR_INCLUDE_NET_LWM2M_PATH_H_
 
#define LWM2M_PATH(...) \
        LWM2M_PATH_MACRO(__VA_ARGS__, LWM2M_PATH4, LWM2M_PATH3, \
                         LWM2M_PATH2, LWM2M_PATH1)(__VA_ARGS__)
 
 
/* Internal helper macros for the LWM2M_PATH macro */
#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__)
 
/* Internal helper macros for the LWM2M_OBJ macro */
#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) (struct lwm2m_obj_path) \
        {.obj_id = oi, .obj_inst_id = oii, .res_id = ri, .level = 3}
#define LWM2M_OBJ4(oi, oii, ri, rii) (struct lwm2m_obj_path) \
        {.obj_id = oi, .obj_inst_id = oii, .res_id = ri, .res_inst_id = rii, .level = 4}
#endif /* ZEPHYR_INCLUDE_NET_LWM2M_PATH_H_ */