From 372be38613d5ee16d4fea9f73f3036e92f364a09 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C5=99emysl=20Janouch?= <p.janouch@gmail.com>
Date: Thu, 20 Oct 2016 01:58:16 +0200
Subject: [PATCH] Get rid of machine.go

---
 machine.go | 61 ------------------------------------------------------
 main.go    | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 57 insertions(+), 62 deletions(-)
 delete mode 100644 machine.go

diff --git a/machine.go b/machine.go
deleted file mode 100644
index c43ccae..0000000
--- a/machine.go
+++ /dev/null
@@ -1,61 +0,0 @@
-package main
-
-import (
-	"errors"
-	"fmt"
-)
-
-func Run(code []int16) error {
-	if len(code) != 100 {
-		return errors.New("Code must be exactly 100 mailboxes long")
-	}
-
-	//	for i, x := range code {
-	//		fmt.Printf("%d: %d\n", i, x)
-	//	}
-	//	fmt.Println()
-
-	var accumulator int16 = 0
-
-	pc := 0
-	for pc >= 0 && pc < len(code) {
-		i := code[pc]
-		arg := i % 100
-		pc++
-
-		switch i - arg {
-		case IHALT:
-			return nil
-		case IADD:
-			accumulator += code[arg]
-		case ISUBTRACT:
-			accumulator -= code[arg]
-		case ISTORE:
-			code[arg] = accumulator
-		case ILOAD:
-			accumulator = code[arg]
-		case IBRANCH:
-			pc = int(i % 100)
-		case IBRANCH_IF_ZERO:
-			if accumulator == 0 {
-				pc = int(arg)
-			}
-		case IBRANCH_IF_POSITIVE:
-			if accumulator > 0 {
-				pc = int(arg)
-			}
-		case IIO:
-			switch arg {
-			case IO_INPUT:
-				fmt.Printf("Input: ")
-				fmt.Scanf("%d\n", &accumulator)
-			case IO_OUTPUT:
-				fmt.Printf("Output: %d\n", accumulator)
-			}
-		default:
-			e := fmt.Sprintf("Unsupported instruction %d at %d", i, pc)
-			return errors.New(e)
-		}
-	}
-	return errors.New("Program counter ran away")
-}
diff --git a/main.go b/main.go
index d08e114..61a7393 100644
--- a/main.go
+++ b/main.go
@@ -1,10 +1,66 @@
 package main
 
 import (
+	"errors"
 	"fmt"
 	"os"
 )
 
+func run(code []int16) error {
+	if len(code) != 100 {
+		return errors.New("Code must be exactly 100 mailboxes long")
+	}
+
+	//	for i, x := range code {
+	//		fmt.Printf("%d: %d\n", i, x)
+	//	}
+	//	fmt.Println()
+
+	var accumulator int16 = 0
+
+	pc := 0
+	for pc >= 0 && pc < len(code) {
+		i := code[pc]
+		arg := i % 100
+		pc++
+
+		switch i - arg {
+		case IHALT:
+			return nil
+		case IADD:
+			accumulator += code[arg]
+		case ISUBTRACT:
+			accumulator -= code[arg]
+		case ISTORE:
+			code[arg] = accumulator
+		case ILOAD:
+			accumulator = code[arg]
+		case IBRANCH:
+			pc = int(i % 100)
+		case IBRANCH_IF_ZERO:
+			if accumulator == 0 {
+				pc = int(arg)
+			}
+		case IBRANCH_IF_POSITIVE:
+			if accumulator > 0 {
+				pc = int(arg)
+			}
+		case IIO:
+			switch arg {
+			case IO_INPUT:
+				fmt.Printf("Input: ")
+				fmt.Scanf("%d\n", &accumulator)
+			case IO_OUTPUT:
+				fmt.Printf("Output: %d\n", accumulator)
+			}
+		default:
+			e := fmt.Sprintf("Unsupported instruction %d at %d", i, pc)
+			return errors.New(e)
+		}
+	}
+	return errors.New("Program counter ran away")
+}
+
 func main() {
 	if len(os.Args) != 2 {
 		fmt.Printf("usage: %s file\n", os.Args[0])
@@ -12,7 +68,7 @@ func main() {
 		fmt.Printf("Cannot open file: %s\n", err)
 	} else if code, err := Assemble(file); err != nil {
 		fmt.Printf("Assembly failed: %s\n", err)
-	} else if err = Run(code); err != nil {
+	} else if err = run(code); err != nil {
 		fmt.Printf("Runtime error: %s\n", err)
 	} else {
 		os.Exit(0)