From ba35470c3caa0f4b2fefb42720263993cc90d86b Mon Sep 17 00:00:00 2001
From: n loewen <nick@nloewen.com>
Date: Wed, 26 Jul 2023 15:02:21 +0100
Subject: [PATCH] Make assembler a javascript module, remove code for working
 over stdio

---
 sketches/assembler_sketch.js | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/sketches/assembler_sketch.js b/sketches/assembler_sketch.js
index d51286d..e9cee51 100644
--- a/sketches/assembler_sketch.js
+++ b/sketches/assembler_sketch.js
@@ -1,5 +1,3 @@
-// Usage: `node assembler_sketch.js assembly.asm`
-
 // Syntax:
 // ADD $01   ; comments follow a `;`
 // ADD $FF   ; this is direct addressing
@@ -7,9 +5,6 @@
 // END       ; END, CFC, and CHP don't require arguments
 //           ; (a default value of 0 will be used as their operand)
 
-const fs = require('fs');
-const filename = process.argv[2];
-
 const mnemonicsWithOptionalArgs = ['end', 'cfc', 'chp'];
 const mnemonics2opcodes = {
   end: { direct: 0, indirect: 0 },
@@ -32,7 +27,7 @@ function decodeMultipleInstructions(str) {
     output.push(decoded.op);
     output.push(decoded.arg);
   });
-  return output;
+  return new Uint8Array(output);
 }
 
 function decodeInstruction(line) {
@@ -80,10 +75,6 @@ function hex2num(hex) { return parseInt(hex, 16) };
 
 // RUN IT
 
-try {
-  // console.log(`Reading ${filename}`);
-  const inputFile_str = fs.readFileSync(filename, 'utf8');
-  console.log(decodeMultipleInstructions(inputFile_str));
-} catch (err) {
-  console.error(err);
+exports.assemble = (str) => {
+  return decodeMultipleInstructions(str);
 }
\ No newline at end of file