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);
    objState->indent = origState->indent;
    objState->space = origState->space;
    objState->space_before = origState->space_before;
    objState->object_nl = origState->object_nl;
    objState->array_nl = origState->array_nl;
    objState->as_json = origState->as_json;
    return obj;
}