def Jump(arg):
arg_type, arg_value = arg
if arg_type == "link":
change.attribute(seg_links["system"], "target_cell", arg_value)
else:
raise UndefinedBehaviour(f"Поведение команды Jmp с аргументом типа"
f"{arg_type} не определено")
def data_segment(num):
new_size = calculate_new_size(num)
new_num = add.create_segment("data_segment", self_length=new_size)
attach_with_old_segment(num, new_num)
change.attribute(seg_links["system"], "last_data_segment", new_num)
add.empty_data(new_num)
return new_num
def program(cells):
length = memory_control.determine_segment_size("program", len(cells))
num = create_segment("program", self_length=length)
# потом: сделать механизм проверки главности программы
change.attribute(seg_links["system"], "main_program", num)
data_begin = stream_data(num, cells)
change.attribute(seg_links["system"], "target_cell", data_begin)
change.relative_links(num)
namespace(num)
return num
def Jump_if(condition, arg):
cond_arg_type, cond_type, cond_value = link.unpack(condition)
arg_type, arg_value = arg
if arg_type == "link":
if cond_type == "logic":
if not cond_value:
change.attribute(seg_links["system"], "target_cell", arg_value)
append.memory_stack("link", 0)
else:
raise UndefinedBehaviour(
f"Поведение команды Jif с аргументами типов {arg_type} и "
f"{cond_type} не определено")
else:
raise UndefinedArgument(f"Поведение команды Jif с аргументом типа"
f"{arg_type} не определено")
def attribute_writing():
"""Проверка на изменение атрибута"""
add.system_area()
display.segment(0)
show.attribute(0, "segment_end")
show.attribute(0, "memory_stack")
print()
change.attribute(0, "segment_end", 64)
display.segment(0)
show.attribute(0, "segment_end")
print()
change.attribute(0, "memory_stack", 32)
display.segment(0)
show.attribute(0, "memory_stack")
print()
def segment(num, seg_type, length):
base_args = {}
if type(seg_type) == int:
if not (0 <= seg_type < len(seg_types)):
raise LowerCommandError(f"Неподдерживаемый индекс типа"
f"сегмента: {seg_type}")
base_args["type"] = seg_type
elif type(seg_type) == str:
if seg_type not in seg_types:
raise LowerCommandError(f"Неизвестный тип сегмента: {seg_type}")
base_args["type"] = seg_types.index(seg_type)
base_args["length"] = length
write.segment(num, base_args, {})
# запись ссылки на конец сегмента
change.attribute(num, "segment_end", num + length)
def namespace(program_num):
num = create_segment("namespace")
change.attribute(num, "program", program_num)
change.attribute(program_num, "namespace", num)
# потом: сделать механизм проверки главности пространства имён
change.attribute(seg_links["system"], "target_namespace", num)
empty_data(num)
return num
def Return():
link_type, target_cell = pull.call_stack()
change.attribute(seg_links["system"], "target_cell", target_cell)
def change_data(num, first_empty_cell_value, free_cells_value):
change.attribute(num, "first_empty_cell", first_empty_cell_value)
change.attribute(num, "free_cells", free_cells_value)
def change_stack(num, first_empty_cell_value, last_full_cell_value,
free_cells_value):
change.attribute(num, "first_empty_cell", first_empty_cell_value)
change.attribute(num, "last_full_cell", last_full_cell_value)
change.attribute(num, "free_cells", free_cells_value)
def empty_data(num):
first = num + header_length
change.attribute(num, "data_begin", first)
change.attribute(num, "first_empty_cell", first)
seg_end = find.attribute(num, "segment_end")
change.attribute(num, "free_cells", seg_end - first)
def tape_length(delta):
length = find.attribute(seg_links["system"], "tape_length")
change.attribute(seg_links["system"], "tape_length", length + delta)
def data_segment():
num = create_segment("data_segment")
change.attribute(seg_links["system"], "first_data_segment", num)
change.attribute(seg_links["system"], "last_data_segment", num)
empty_data(num)
return num
def call_stack():
num = create_segment("call_stack")
change.attribute(seg_links["system"], "call_stack", num)
empty_data(num)
return num
def End():
change.attribute(seg_links["system"], "target_cell", 0)
def stream_data(num, stream):
first = num + header_length
change.attribute(num, "data_begin", first)
write.cells_stream(first, stream)
change.attribute(num, "first_empty_cell", first + len(stream))
return first
def attach_with_old_segment(num, new_num):
change.attribute(num, "next_segment", new_num)
change.attribute(new_num, "previous_segment", num)