From 944bad6c5749a5b3fc4150d354155debcd449412 Mon Sep 17 00:00:00 2001
From: Xevion <xevioni@yandex.com>
Date: Sat, 7 Dec 2019 15:45:13 -0600
Subject: [PATCH] day 5 part 1 & 2 rehaul study copy

---
 2019/day-5/python/main.py | 158 +++++++++++++++++++++++++-------------
 1 file changed, 106 insertions(+), 52 deletions(-)

diff --git a/2019/day-5/python/main.py b/2019/day-5/python/main.py
index 9f4d29d..8fc138e 100644
--- a/2019/day-5/python/main.py
+++ b/2019/day-5/python/main.py
@@ -1,60 +1,114 @@
 import os
 import sys
 
-PATH = os.path.join(sys.path[0], '..', 'input')
-memory = list(open(PATH, 'r').read().split(','))
+class IntCodeExit(Exception):
+    pass
 
-def getParams(pos, opcode, type1, type2, type3):
-    params = []
-    if opcode in ['03', '04']:
-        params.append(memory[pos + 1])
-        # if type1 == '0':
-            # params[-1] = memory[int(params[-1])]
-    elif opcode in ['01', '02']:
-        params.append(memory[pos + 1])
-        if type1 == '0':
-            params[-1] = memory[int(params[-1])]
-        params.append(memory[pos + 2])
-        if type2 == '0':
-            params[-1] = memory[int(params[-1])]
-        params.append(memory[pos + 3])
-        # if type3 == '0':
-            # params[-1] = memory[int(params[-1])]
-        # print(memory[pos:pos+4])
-    elif opcode in ['99']:
-        pass
-    return params
+class IntCodeStatus(Exception):
+    def __init__(self, code):
+        self.code = code
+        return super().__init__(f"Status code '{self.code}' was raised by the Intcode Computer.")
 
-inputs = [1]
-pos = 0
+class IntcodeComputer(object):
+    def __init__(self, memory, _input=[], pointer=0, silent=True):
+        self.memory = memory
+        self._input = iter(_input)
+        self.pointer = pointer
+        self.silent = silent
 
-while pos < len(memory) - 4:
-    if len(memory[pos]) < 5:
-        memory[pos] = ('0' * (5 - len(memory[pos]))) + memory[pos]
-    opcode = memory[pos][-2:]
+        self.READ_MODES = {
+            0: (self.point, self.point, self.point),
+            100: (self.point, self.point, self.value),
+            10: (self.point, self.value, self.point),
+            110: (self.point, self.value, self.value),
+            1: (self.value, self.point, self.point),
+            101: (self.value, self.point, self.value),
+            11: (self.value, self.value, self.point),
+            111: (self.value, self.value, self.value),
+        }
 
-    type1 = memory[pos][-3]
-    type2 = memory[pos][-4]
-    type3 = memory[pos][-5]
+        self.OP_CODES = {
+            1 : (self.op_add, 3),
+            2 : (self.op_multiply, 3),
+            3 : (self.op_input, 1),
+            4 : (self.op_print, 1),
+            5 : (self.op_jit, 2),
+            6 : (self.op_jif, 2),
+            7 : (self.op_lth, 3),
+            8 : (self.op_eq, 3),
+            99 : (self.op_exit, 0)
+        }
 
-    params = getParams(pos, opcode, type1, type2, type3)
-    if opcode == '01':
-        memory[int(params[2])] = str(int(params[0]) + int(params[1]))
-        pos += 4
-    elif opcode == '02':
-        memory[int(params[2])] = str(int(params[0]) * int(params[1]))
-        pos += 4
-    elif opcode == '03':
-        memory[int(params[0])] = str(inputs.pop(0))
-        pos += 2
-    elif opcode == '04':
-        print(f'OUTPUT: {params[0]}')
-        pos += 2
-    elif opcode == '99':
-        print('PROGRAM BREAK')
-        pos += 1
-        break
-    else:
-        print(f'Unknown Opcode "{opcode}"')
-        break
-    print(f'#{pos // 4} {type3}{type2}{type1}{opcode} {params}')
\ No newline at end of file
+    def hasNext(self):
+        return self.pointer < len(self.memory)
+
+    def next(self):
+        op, params, offset = self.read(self.pointer)
+        self.pointer += offset
+        op(*params)
+    
+    def run(self):
+        statuses = []
+        while self.hasNext():
+            try:
+                self.next()
+            except IntCodeStatus as s:
+                statuses.append(s.code)
+            except IntCodeExit:
+                return statuses[-1]
+
+    def read(self, pointer):
+        code = self.memory[pointer]
+        readmodes, opcode = divmod(code, 100)
+        op, nargs = self.OP_CODES[opcode]
+        argument_functions = self.READ_MODES[readmodes][:nargs]
+        parameters = [f(ptr) for f, ptr in zip(argument_functions, range(pointer+1, pointer+4))]
+        return op, parameters, nargs + 1
+
+    def op_add(self, param1, param2, param3):
+        self.memory[param3] = self.memory[param1] + self.memory[param2]
+
+    def op_multiply(self, param1, param2, param3):
+        self.memory[param3] = self.memory[param1] * self.memory[param2]
+
+    def op_input(self, param1):
+        self.memory[param1] = next(self._input)
+
+    def op_print(self, param1):
+        if not self.silent:
+            print(self.memory[param1])
+        raise IntCodeStatus(self.memory[param1])
+
+    def op_exit(self):
+        raise IntCodeExit()
+
+    def op_jit(self, param1, param2):
+        if self.memory[param1] != 0:
+            self.pointer = self.memory[param2]
+
+    def op_jif(self, param1, param2):
+        if self.memory[param1] == 0:
+            self.pointer = self.memory[param2]
+
+    def op_lth(self, param1, param2, param3):
+        self.memory[param3] = 1 if self.memory[param1] < self.memory[param2] else 0
+
+    def op_eq(self, param1, param2, param3):
+        self.memory[param3] = 1 if self.memory[param1] == self.memory[param2] else 0
+
+    def value(self, location):
+        return location
+    
+    def point(self, location):
+        ptr = self.memory[location]
+        return ptr
+
+def day5(memory, _input, silent=True):
+    computer = IntcodeComputer(memory.copy(), _input=_input, silent=silent)
+    print(computer.run())
+
+path = os.path.join(sys.path[0], '..', 'input')
+data = list(map(int, open(path, 'r').read().split(',')))
+
+day5(data, _input=[1])
+day5(data, _input=[5])
\ No newline at end of file