JSON::Ext::Generator::State#initialize_copy

static VALUE cState_init_copy(VALUE obj, VALUE orig)
{
    JSON_Generator_State *objState, *origState;

    if (obj == orig) return obj;
    GET_STATE_TO(obj, objState);
    GET_STATE_TO(orig, origState);
    if (!objState) rb_raise(rb_eArgError, "unallocated JSON::State");

    MEMCPY(objState, origState, JSON_Generator_State, 1);

    RB_OBJ_WRITTEN(obj, Qundef, objState->indent);
    RB_OBJ_WRITTEN(obj, Qundef, objState->space);
    RB_OBJ_WRITTEN(obj, Qundef, objState->space_before);
    RB_OBJ_WRITTEN(obj, Qundef, objState->object_nl);
    RB_OBJ_WRITTEN(obj, Qundef, objState->array_nl);
    RB_OBJ_WRITTEN(obj, Qundef, objState->as_json);
    RB_OBJ_WRITTEN(obj, Qundef, objState->sort_keys);

    return obj;
}