def op_unpack(engine):
items = PushData.pop_array(engine)
l = len(items)
for i in range(l - 1, -1, -1):
PushData.push(engine, items[i])
PushData.push_data(engine, l)
return VMState.NONE
def op_over(engine):
x2 = PushData.pop_stack_item(engine)
x1 = PushData.peek_stack_item(engine)
PushData.peek_stack_item(engine)
PushData.push(engine, x2)
PushData.push(engine, x1)
return VMState.NONE
def op_tuck(engine):
x2 = PushData.pop_stack_item(engine)
x1 = PushData.pop_stack_item(engine)
PushData.push(engine, x2)
PushData.push(engine, x1)
PushData.push(engine, x2)
return VMState.NONE
def op_rot(engine):
x3 = PushData.pop_stack_item(engine)
x2 = PushData.pop_stack_item(engine)
x1 = PushData.pop_stack_item(engine)
PushData.push(engine, x2)
PushData.push(engine, x3)
PushData.push(engine, x1)
return VMState.NONE
def op_roll(engine):
n = PushData.pop_int(engine)
if n == 0:
return VMState.NONE
PushData.push(engine, engine.evaluation_stack.remove(n))
return VMState.NONE
def op_pick(engine):
n = PushData.pop_int(engine)
if n == 0:
return VMState.NONE
PushData.push(engine, engine.evaluation_stack.peek(n))
return VMState.NONE
def op_to_dup_from_alt_stack(engine):
PushData.push(engine, engine.alt_stack.peek(0))
return VMState.NONE
def op_nip(engine):
x2 = PushData.pop_stack_item(engine)
PushData.peek_stack_item(engine)
PushData.push(engine, x2)
return VMState.NONE
def op_dup(engine):
items = PushData.peek_stack_item(engine)
PushData.push(engine, items)
return VMState.NONE
def op_from_alt_stack(engine):
items = engine.alt_stack.pop()
PushData.push(engine, items)
return VMState.NONE