70     MppCfgObj root = NULL;  in main()  local
112         ret = mpp_cfg_from_string(&root, MPP_CFG_STR_FMT_JSON, buf);  in main()
118         mpp_logi("get cfg object %p from file\n", root);  in main()
120         mpp_cfg_dump_f(root);  in main()
122         ret = test_to_from(root, MPP_CFG_STR_FMT_LOG);  in main()
127         ret = test_to_from(root, MPP_CFG_STR_FMT_JSON);  in main()
132         ret = test_to_from(root, MPP_CFG_STR_FMT_TOML);  in main()
147         mpp_cfg_put_all(root);  in main()
148         root = NULL;  in main()
154     ret = mpp_cfg_get_object(&root, NULL, MPP_CFG_TYPE_OBJECT, NULL);  in main()
186     ret = mpp_cfg_add(root, array);  in main()
202     ret = mpp_cfg_add(root, obj);  in main()
218     ret = mpp_cfg_add(root, obj);  in main()
234     ret = mpp_cfg_add(root, obj);  in main()
242     mpp_cfg_dump_f(root);  in main()
244     ret = test_to_from(root, MPP_CFG_STR_FMT_LOG);  in main()
249     ret = test_to_from(root, MPP_CFG_STR_FMT_JSON);  in main()
263     if (root) {  in main()
264         mpp_cfg_put_all(root);  in main()
265         root = NULL;  in main()