CJSON_PUBLIC(char*) cJSON_SetValuestring(cJSON *object, const char *valuestring)
{
    char *copy = NULL;
    /* if object's type is not cJSON_String or is cJSON_IsReference, it should not set valuestring */
    if (!(object->type & cJSON_String) || (object->type & cJSON_IsReference))
    {
        return NULL;
    }
    if (strlen(valuestring) <= strlen(object->valuestring)) // <== here
    {
        strcpy(object->valuestring, valuestring);
        return object->valuestring;
    }
    copy = (char*) cJSON_strdup((const unsigned char*)valuestring, &global_hooks);
    if (copy == NULL)
    {
        return NULL;
    }
    if (object->valuestring != NULL)
    {
        cJSON_free(object->valuestring);
    }
    object->valuestring = copy;

    return copy;
}