From 049d9367ac4b289ac47ececd180637a5a04c80b1 Mon Sep 17 00:00:00 2001
From: n loewen <nick@nloewen.com>
Date: Tue, 29 Aug 2023 12:54:32 -0400
Subject: [PATCH] cardiograph - Change to take input from stdin!

---
 src/cardiograph.js | 64 +++++++++++++++++++++++++++++-----------------
 1 file changed, 40 insertions(+), 24 deletions(-)

diff --git a/src/cardiograph.js b/src/cardiograph.js
index 4694460..931c8d2 100644
--- a/src/cardiograph.js
+++ b/src/cardiograph.js
@@ -1,3 +1,4 @@
+const DBG = require('./dbg.js');
 const { num2hex, bool2bit } = require('./logging.js');
 
 const CFG = require('./machine.config.js');
@@ -5,25 +6,45 @@ const CPU = require('./cpu.js');
 const io = require('./io.js');
 
 
-// TODO - replace with reading STDIN:
-  const assembler = require('./assembler.js');
-  const fs = require('fs');
-
-  const filename = process.argv[2];
-  const inputFile_str = fs.readFileSync(filename, 'utf8');
-  let assemblerOutput = assembler.assemble(inputFile_str);
-
+/** SETUP **/
+const dbg = new DBG('nitpick');
 let cpu = new CPU(CFG.initialIP, CFG.defaultCycleLimit);
 
-cpu.loadMemory(assemblerOutput.machineCode);
-cpu.loadSourceInfo(assemblerOutput.debugInfo);
+main();
 
-cpu.onCycleEnd(tick);
-cpu.onCycleEnd(logCPUState);
+async function main() {
+  const input = await readPipedStdin();
+  dbg.nit('input: \n', input);
+
+  const debuggable = true; // FIXME - Get this as a command line flag instead
+  // if debuggable === true, the input is JSON {sourceInfo, machineCode}
+  // otherwise, the input is a string of space-separated numbers
+
+  let code = null;
+  let sourceInfo = null;
+
+  if (!debuggable) {
+    code = new Uint8Array(input.split(' '));
+    dbg.nit(code);
+  } else {
+    const parsedInput = JSON.parse(input);
+    code = new Uint8Array(parsedInput.machineCode);
+    sourceInfo = parsedInput.sourceInfo;
+    dbg.nit(code);
+    dbg.nit(sourceInfo);
+  }
+
+  cpu.loadMemory(code);
+  if (debuggable) { cpu.loadSourceInfo(sourceInfo); }
+
+  cpu.onCycleEnd(tick);
+  cpu.onCycleEnd(logCPUState);
+
+  cpu.start();
+  io.getKeypadInput(cpu);
+  cpu.step();
+}
 
-cpu.start();
-io.getKeypadInput(cpu);
-cpu.step();
 
 async function tick() {
   const sleep = ms => new Promise(resolve => setTimeout(resolve, ms))
@@ -36,7 +57,10 @@ async function tick() {
 }
 
 function logCPUState() {
-  let lineInfo = cpu.dbg.sourceInfo[cpu.dbg.previousIP];
+  let lineInfo = null;
+  if (cpu.dbg.sourceInfo) {
+    lineInfo = cpu.dbg.sourceInfo[cpu.dbg.previousIP];
+  }
   console.group(`Step ${cpu.dbg.cycleCounter}`);
     console.log();
     io.showDisplay(cpu.memory, true); // FIXME - display - allow printing hex as well as pretty-printing
@@ -54,14 +78,6 @@ function logCPUState() {
   console.groupEnd();
 };
 
-
-/*
-(async function() {
-  let input = await readPipedStdin();
-  console.log(input);
-})()
-*/
-
 async function readPipedStdin() {
   // https://wellingguzman.com/notes/node-pipe-input
   return new Promise(function (resolve, reject) {