zephyr issue 24372

main.c

#include <zephyr.h>
#include <sys/printk.h>
#include <data/json.h>

typedef struct {
    char *id;
    uint32_t d;
    uint8_t t;
} data_first;

typedef struct {
    char *id;
    uint32_t d;
} data_second;

typedef struct {
    data_first t_0[4];
    size_t data_first_size;
    data_second t_1[2];
    size_t data_second_size;
} message;

const struct json_obj_descr data_first_json[] = {
    JSON_OBJ_DESCR_PRIM(data_first, id, JSON_TOK_STRING),
    JSON_OBJ_DESCR_PRIM(data_first, d, JSON_TOK_NUMBER),
    JSON_OBJ_DESCR_PRIM(data_first, t, JSON_TOK_NUMBER)
};

const struct json_obj_descr data_second_json[] = {
    JSON_OBJ_DESCR_PRIM(data_first, id, JSON_TOK_STRING),
    JSON_OBJ_DESCR_PRIM(data_first, d, JSON_TOK_NUMBER)
};

const struct json_obj_descr message_json[] = {
    JSON_OBJ_DESCR_OBJ_ARRAY(message, t_0, 4,
                                data_first_size, data_first_json,
                                ARRAY_SIZE(data_first_json)),
    JSON_OBJ_DESCR_OBJ_ARRAY(message, t_1, 2,
                                data_second_size, data_second_json,
                                ARRAY_SIZE(data_second_json)),
};

u8_t buf[1024];

void main(void)
{
	message m= {
		.t_0[0] = {
			.id = "t01",
			.d = 20,
			.t= 1
		},
		.t_0[1] = {
			.id = "t02",
			.d= 10,
			.t= 1
		},
		.t_0[2] = {
			.id = "t03",
			.d= 15,
			.t= 0
		},
		.t_0[3] = {
			.id = "t04",
			.d = 50,
			.t = 1
		},
		.data_first_size= 4,
		.t_1[0] = {
			.id = "t11",
			.d = 10
		},
		.t_1[1] = {
			.id = "t12",
			.d= 20
		},
		.data_second_size = 2
	};

	int rc = json_obj_encode_buf(message_json, ARRAY_SIZE(message_json),
				     &m,
				     buf, sizeof(buf));

	if (rc >= 0) {
		printk("enc:\n%s\n", buf);
	} else {
		printk("failed: %d\n", rc);
	}
}