From b5af1bfe24c27199168b28a82a04275e6403d24d Mon Sep 17 00:00:00 2001
From: AJ ONeal <aj@daplie.com>
Date: Mon, 9 Oct 2017 10:56:02 -0600
Subject: [PATCH] WIP output byte indexes while parsing

---
 bin/debug.js | 35 ++++++++++++++++++++---------------
 1 file changed, 20 insertions(+), 15 deletions(-)

diff --git a/bin/debug.js b/bin/debug.js
index a41ec48..18d8a5b 100644
--- a/bin/debug.js
+++ b/bin/debug.js
@@ -45,8 +45,6 @@ console.log('ancount', ancount);
 console.log('nscount', nscount);
 console.log('arcount', arcount);
 
-var total = 12;
-
 function unpackQuestion(dv, total, len) {
   var qnames = [];
   var labelLen;
@@ -77,10 +75,11 @@ function unpackQuestion(dv, total, len) {
     console.log('label:', label);
     qnames.push(label);
   }
-  console.log('QNAME:', qnames.join('.'));
-  console.log('QTYPE:', dv.getUint16(total), false);
+  // leading length and (potentially) trailing null
+  console.log('QNAME (len ' + (qnames.join('.').length + 1 + (labelLen ? 0 : 1)) + '):', qnames.join('.'));
+  console.log('QTYPE (len 2):', dv.getUint16(total, false));
   total += 2;
-  console.log('QCLASS:', dv.getUint16(total), false);
+  console.log('QCLASS (len 2):', dv.getUint16(total, false));
   total += 2;
 
   return {
@@ -89,8 +88,9 @@ function unpackQuestion(dv, total, len) {
   };
 }
 
-var q = { total: total };
-function mapChar(ch) { return String.fromCharCode(ch) + '(' + ch + ')'; }
+var q = { total: 12 };
+function mapChar(ch) { return JSON.stringify(String.fromCharCode(ch)) + '(' + ch + ')'; }
+
 
 console.log('');
 console.log('//////////////////');
@@ -98,7 +98,8 @@ console.log('//   QUESTION   //');
 console.log('//////////////////');
 console.log('');
 for (count = 0; count < qdcount; count += 1) {
-  console.log('Question', count + 1, 'of', qdcount);
+  console.log('');
+  console.log('Question ' + (count + 1) + ' of ' + qdcount + ' (byte index: ' + q.total + ')');
   q = unpackQuestion(dv, q.total, ab.byteLength);
   console.log('');
 }
@@ -109,7 +110,8 @@ console.log('//    ANSWER    //');
 console.log('//////////////////');
 console.log('');
 for (count = 0; count < ancount; count += 1) {
-  console.log('Answer', count + 1, 'of', ancount);
+  console.log('');
+  console.log('Answer', count + 1, 'of', ancount + ' (byte index: ' + q.total + ')');
   q = unpackQuestion(dv, q.total, ab.byteLength);
   console.log('');
 }
@@ -121,16 +123,18 @@ console.log('//   AUTHORITY  //');
 console.log('//////////////////');
 console.log('');
 for (count = 0; count < nscount; count += 1) {
-  console.log('Authority', count + 1, 'of', nscount);
+  console.log('');
+  console.log('Authority', count + 1, 'of', nscount + ' (byte index: ' + q.total + ')');
   q = unpackQuestion(dv, q.total, ab.byteLength);
-  console.log('ttl:', dv.getUint32(q.total, false));
+  console.log('ttl (len 4):', dv.getUint32(q.total, false));
   q.total += 4;
   q.rdlength = dv.getUint16(q.total, false);
-  console.log('rdlen:', q.rdlength);
+  console.log('rdlen (len 2):', q.rdlength);
   q.total += 2;
-  console.log('rrdata:');
-  console.log([].slice.call(new Uint8Array(ab), q.total, q.total + q.rdlength).map(mapChar));
+  console.log('rrdata (len ' + q.rdlength + '):');
+  console.log([].slice.call(new Uint8Array(ab), q.total, q.total + q.rdlength).map(mapChar).join(' '));
   q.total += q.rdlength;
+  console.log('');
 }
 
 console.log('');
@@ -139,7 +143,8 @@ console.log('//  ADDITIONAL  //');
 console.log('//////////////////');
 console.log('');
 for (count = 0; count < arcount; count += 1) {
-  console.log('Additional', count + 1, 'of', arcount);
+  console.log('');
+  console.log('Additional', count + 1, 'of', arcount + ' (byte index: ' + q.total + ')');
   q = unpackQuestion(dv, q.total, ab.byteLength);
   console.log('');
 }