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Make space for two-digit days

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This commit is contained in:
Jeremy Kaplan 2019-12-10 08:44:15 -08:00
commit 07eb60e5e1
29 changed files with 0 additions and 1584 deletions
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231
2019/day7/intcode.rb
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@ -1,231 +0,0 @@
# frozen_string_literal: true
require 'forwardable'
module Intcode
def self.read(filename)
parse File.read(filename)
end
def self.parse(input)
parsed = input
.gsub(/^#.*$/, '')
.gsub('\s', '')
.split(',')
.map(&:to_i)
Program.new parsed
end
class Program
def initialize(mem)
@initial_state = mem
end
def as_memory
Memory.new(@initial_state.clone)
end
def run(&user_input)
Computer.new(as_memory).run(&user_input)
end
end
class Memory
extend Forwardable
def_delegator :@cells, :[]
def_delegator :@cells, :[]=
def initialize(cells)
@cells = cells
end
def to_s
batch_size = 10
s = String.new
@cells.each_slice(batch_size).each_with_index do |batch, idx|
prefix = idx * batch_size
s << "#{prefix}: #{batch.join(' ')}\n"
end
s
end
def [](idx)
raise ArgumentError, "index out of range: #{idx}" if idx.negative? || idx >= @cells.length
@cells[idx]
end
def []=(idx, val)
raise ArgumentError, "index out of range: #{idx}" if idx.negative? || idx >= @cells.length
@cells[idx] = val
end
end
class Computer
def initialize(mem, &block)
@mem = mem
@ip = 0
@input_block = block
end
def on_output(&block)
@output_block = block
end
def run
loop do
return if tick == :done_executing
end
end
def tick
case operation(@mem[@ip])
when 1
add!
nil
when 2
mul!
nil
when 3
input!(&@input_block)
nil
when 4
output!(&@output_block)
when 5
branch_if_not_zero!
nil
when 6
branch_if_zero!
nil
when 7
less_than!
nil
when 8
equal!
nil
when 99
:done_executing
else
raise StandardError, "unexpected opcode: #{opcode}"
end
end
private
def add!
mode = modes(@mem[@ip])
a = read(@ip + 1, mode[0])
b = read(@ip + 2, mode[1])
r = @mem[@ip + 3]
raise StandardError, "unexpected mode: #{mode[2]}" if mode[2] != 0
@mem[r] = a + b
@ip += 4
end
def mul!
mode = modes(@mem[@ip])
a = read(@ip + 1, mode[0])
b = read(@ip + 2, mode[1])
r = @mem[@ip + 3]
raise StandardError, "unexpected mode: #{mode[2]}" if mode[2] != 0
@mem[r] = a * b
@ip += 4
end
def input!(&user_input)
mode = modes(@mem[@ip])
r = @mem[@ip + 1]
raise StandardError, "unexpected mode: #{mode[0]}" if mode[0] != 0
@mem[r] = input(&user_input)
@ip += 2
end
def output!(&user_output)
mode = modes(@mem[@ip])
output = read(@ip + 1, mode[0])
user_output.call output if block_given?
@ip += 2
output
end
def branch_if_not_zero!
mode = modes(@mem[@ip])
a = read(@ip + 1, mode[0])
b = read(@ip + 2, mode[1])
@ip = a.zero? ? @ip + 3 : b
end
def branch_if_zero!
mode = modes(@mem[@ip])
a = read(@ip + 1, mode[0])
b = read(@ip + 2, mode[1])
@ip = a.zero? ? b : @ip + 3
end
def less_than!
mode = modes(@mem[@ip])
a = read(@ip + 1, mode[0])
b = read(@ip + 2, mode[1])
r = @mem[@ip + 3]
raise StandardError, "unexpected mode: #{mode[2]}" if mode[2] != 0
@mem[r] = a < b ? 1 : 0
@ip += 4
end
def equal!
mode = modes(@mem[@ip])
a = read(@ip + 1, mode[0])
b = read(@ip + 2, mode[1])
r = @mem[@ip + 3]
raise StandardError, "unexpected mode: #{mode[2]}" if mode[2] != 0
@mem[r] = a == b ? 1 : 0
@ip += 4
end
def input
if block_given?
inp = yield
raise "Invalid input: #{inp.inspect}" unless inp.is_a?(Numeric)
return inp
end
print 'input> '
gets.to_i
end
def operation(cell)
(cell % 100)
end
def modes(cell)
m = Hash.new(0)
(cell / 100).truncate.digits.each_with_index do |d, i|
m[i] = d
end
m
end
def param(val, mode)
case mode
when 0
@mem[val]
when 1
val
else
raise StandardError, "unexpected mode: #{mode}"
end
end
def read(addr, mode)
param(@mem[addr], mode)
end
end
end