Програмиране с Ruby

Курс във Факултета по Математика и Информатика към СУ

Решение на Четвърта задача от Венцислав Велков

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Резултати

  • 6 точки от тестове
  • 1 отнета точка
  • 5 точки общо
  • 8 успешни тест(а)
  • 0 неуспешни тест(а)

Код

module Registers
def ax
:@ax
end
def bx
:@bx
end
def cx
:@cx
end
def dx
:@dx
end
end
module Jump
def jmp(where)
if @finalization_flag
if where.instance_of? Fixnum then
@counter = where
else
@counter = @tasks.index [:label, where]
end
else
@tasks << [:jmp, where]
end
end
def je(where)
if @finalization_flag then
jmp where if @last_cmp == 0
else
@tasks << [:je, where]
end
end
def jne(where)
if @finalization_flag then
jmp where if @last_cmp != 0
else
@tasks << [:jne, where]
end
end
def jl(where)
if @finalization_flag then
jmp where if @last_cmp < 0
else
@tasks << [:jl, where]
end
end
def jle(where)
if @finalization_flag then
jmp where if @last_cmp <= 0
else
@tasks << [:jle, where]
end
end
def jg(where)
if @finalization_flag then
jmp where if @last_cmp > 0
else
@tasks << [:jg, where]
end
end
def jge(where)
if @finalization_flag then
jmp where if @last_cmp >= 0
else
@tasks << [:jge, where]
end
end
end
module Asm
class Evaluator
include Jump
include Registers
def initialize
@ax = 0
@bx = 0
@cx = 0
@dx = 0
@tasks = []
@finalization_flag = false
@last_cmp = 0
@counter = 0
end
def mov(destination_register, source)
if @finalization_flag then
if source.instance_of? Symbol then
source = instance_variable_get(source)
end
instance_variable_set(destination_register, source)
else
@tasks << [:mov, destination_register, source]
end
end
def inc(destination_register, value = 1)
if @finalization_flag then
if value.instance_of? Symbol then
value = instance_variable_get(value)
end
instance_variable_set(destination_register,
instance_variable_get(destination_register) + value)
else
@tasks << [:inc, destination_register, value]
end
end
def dec(destination_register, value = 1)
if @finalization_flag then
if value.instance_of? Symbol then
value = instance_variable_get(value)
end
instance_variable_set(destination_register,
instance_variable_get(destination_register) - value)
else
@tasks << [:dec, destination_register, value]
end
end
def cmp(register, value)
if @finalization_flag then
if value.instance_of? Symbol then
value = instance_variable_get(value)
end
instance_variable_set(:@last_cmp, instance_variable_get(register) <=> value)
else
@tasks << [:cmp, register, value]
end
end
def label(label_name)
@tasks << [:label, label_name]
end
def method_missing(name, *args, &block)
name.to_s
end
def print
@finalization_flag = true
while @tasks[@counter]
@counter += 1
if [:mov,:inc,:dec,:cmp].include? @tasks[@counter-1].first then
self.send @tasks[@counter-1][0], @tasks[@counter-1][1], @tasks[@counter-1][2]
elsif [:jmp,:je,:jne,:jl,:jle,:jg,:jge].include? @tasks[@counter-1].first then
self.send @tasks[@counter-1][0], @tasks[@counter-1][1]
end
end
[@ax, @bx, @cx, @dx]
end
end
def self.asm(&block)
b = ->(x) do
x.instance_eval &block
x.print
end
Evaluator.new.instance_eval &b
end
end

Лог от изпълнението

........

Finished in 0.00913 seconds
8 examples, 0 failures

История (1 версия и 4 коментара)

Венцислав обнови решението на 15.01.2014 17:05 (преди почти 11 години)

+module Registers
+ def ax
+ :@ax
+ end
+
+ def bx
+ :@bx
+ end
+
+ def cx
+ :@cx
+ end
+
+ def dx
+ :@dx
+ end
+end
+
+module Jump
+ def jmp(where)
+ if @finalization_flag
+ if where.instance_of? Fixnum then
+ @counter = where
+ else
+ @counter = @tasks.index [:label, where]
+ end
+ else
+ @tasks << [:jmp, where]
+ end
+ end
+
+ def je(where)
+ if @finalization_flag then
+ jmp where if @last_cmp == 0
+ else
+ @tasks << [:je, where]
+ end
+ end
+
+ def jne(where)
+ if @finalization_flag then
+ jmp where if @last_cmp != 0
+ else
+ @tasks << [:jne, where]
+ end
+ end
+
+ def jl(where)
+ if @finalization_flag then
+ jmp where if @last_cmp < 0
+ else
+ @tasks << [:jl, where]
+ end
+ end
+
+ def jle(where)
+ if @finalization_flag then
+ jmp where if @last_cmp <= 0
+ else
+ @tasks << [:jle, where]
+ end
+ end
+
+ def jg(where)
+ if @finalization_flag then
+ jmp where if @last_cmp > 0
+ else
+ @tasks << [:jg, where]
+ end
+ end
+
+ def jge(where)
+ if @finalization_flag then
+ jmp where if @last_cmp >= 0
+ else
+ @tasks << [:jge, where]
+ end
+ end
+end
+
+module Asm
+ class Evaluator
+ include Jump
+ include Registers
+ def initialize
+ @ax = 0
+ @bx = 0
+ @cx = 0
+ @dx = 0
+ @tasks = []
+ @finalization_flag = false
+ @last_cmp = 0
+ @counter = 0
+ end
+
+ def mov(destination_register, source)
+ if @finalization_flag then
+ if source.instance_of? Symbol then
+ source = instance_variable_get(source)
+ end
+ instance_variable_set(destination_register, source)
+ else
+ @tasks << [:mov, destination_register, source]
+ end
+ end
+
+ def inc(destination_register, value = 1)
+ if @finalization_flag then
+ if value.instance_of? Symbol then
+ value = instance_variable_get(value)
+ end
+ instance_variable_set(destination_register,
+ instance_variable_get(destination_register) + value)
+ else
+ @tasks << [:inc, destination_register, value]
+ end
+ end
+
+ def dec(destination_register, value = 1)
+ if @finalization_flag then
+ if value.instance_of? Symbol then
+ value = instance_variable_get(value)
+ end
+ instance_variable_set(destination_register,
+ instance_variable_get(destination_register) - value)
+ else
+ @tasks << [:dec, destination_register, value]
+ end
+ end
+
+ def cmp(register, value)
+ if @finalization_flag then
+ if value.instance_of? Symbol then
+ value = instance_variable_get(value)
+ end
+ instance_variable_set(:@last_cmp, instance_variable_get(register) <=> value)
+ else
+ @tasks << [:cmp, register, value]
+ end
+ end
+
+ def label(label_name)
+ @tasks << [:label, label_name]
+ end
+
+ def method_missing(name, *args, &block)
+ name.to_s
+ end
+
+ def print
+ @finalization_flag = true
+ while @tasks[@counter]
+ @counter += 1
+ if [:mov,:inc,:dec,:cmp].include? @tasks[@counter-1].first then
+ self.send @tasks[@counter-1][0], @tasks[@counter-1][1], @tasks[@counter-1][2]
+ elsif [:jmp,:je,:jne,:jl,:jle,:jg,:jge].include? @tasks[@counter-1].first then
+ self.send @tasks[@counter-1][0], @tasks[@counter-1][1]
+ end
+ end
+ [@ax, @bx, @cx, @dx]
+ end
+ end
+
+ def self.asm(&block)
+ b = ->(x) do
+ x.instance_eval &block
+ x.print
+ end
+ Evaluator.new.instance_eval &b
+ end
+end
  • Модулите Registers и Jumps трябва да се преместят в Asm.
  • Модула Registers трябва да се премахне, ако остане в този си вид. По-добре е да се ползва attr_reader, може би?
  • Методът print не печата нищо никъде. По-добри имена: run, execute, simulate_x86_cpu (последното по-скоро е в кръга на шегата).
  • Има доста повторения. DRY.
  • instance_eval на блок, който приема параметър, върху който се вика instance_eval с някакъв друг блок е твърде много магия. Instanception :-)

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