From b7e7a8264bb8d986c6d21e0252a9a1347b18081c Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Mon, 29 Jul 2013 19:00:31 -0500
Subject: [PATCH] better dumps.

---
 lib/program.js | 85 +++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 81 insertions(+), 4 deletions(-)

diff --git a/lib/program.js b/lib/program.js
index 82cadf3..0ccb3e0 100644
--- a/lib/program.js
+++ b/lib/program.js
@@ -76,17 +76,94 @@ function Program(options) {
 
 Program.prototype.__proto__ = EventEmitter.prototype;
 
-Program.prototype.dump =
-Program.prototype.log = function(file) {
+Program.prototype.dump = function(file) {
   var self = this
-    , _write = this.output.write;
+    , _write = this.output.write
+    , decoder = new (require('string_decoder')).StringDecoder('utf8')
+    , stringify = stringifyLess;
 
   this.logger = require('fs').createWriteStream(file);
 
+  function stringifyJson(data) {
+    return JSON.stringify(caret(data))
+      .replace(/\\u00([0-9a-f])/gi, '\\x$1')
+      .slice(1, -1);
+  }
+
+  function stringifyLess(data) {
+    // Could wrap in: \x1b[7m\x1b[m
+    // for inverse in `less -R`.
+    return caret(data
+      .replace(/\r/g, '\\r')
+      .replace(/\n/g, '\\n')
+      .replace(/\t/g, '\\t'))
+      .replace(/[^ -~]/g, function(ch) {
+        if (ch.charCodeAt(0) > 0xff) return ch;
+        ch = ch.charCodeAt(0).toString(16);
+        if (ch.length > 2) {
+          if (ch.length < 4) ch = '0' + ch;
+          return '\\u' + ch;
+        }
+        if (ch.length < 2) ch = '0' + ch;
+        return '\\x' + ch;
+      });
+  }
+
+  function stringifyMinimal(data) {
+    return data
+      //.replace(/\x1b/g, '^[')
+      .replace(/\r/g, '\\r')
+      .replace(/\n/g, '\\n')
+      .replace(/\t/g, '\\t');
+  }
+
+  function caret(data) {
+    return data.replace(/[\0\x80\x1b-\x1f\x7f\x01-\x1a]/g, function(ch) {
+      switch (ch) {
+        case '\0':
+        case '\200':
+          ch = '@';
+          break;
+        case '\x1b':
+          ch = '[';
+          break;
+        case '\x1c':
+          ch = '\\';
+          break;
+        case '\x1d':
+          ch = ']';
+          break;
+        case '\x1e':
+          ch = '^';
+          break;
+        case '\x1f':
+          ch = '_';
+          break;
+        case '\x7f':
+          ch = '?';
+          break;
+        default:
+          ch = ch.charCodeAt(0);
+          if (ch >= 1 && ch <= 26) {
+          //if (ch >= 'A'.charCodeAt(0) - 64 && ch <= 'Z'.charCodeAt(0) - 64) {
+            ch = String.fromCharCode(ch + 64);
+          } else {
+            return String.fromCharCode(ch);
+          }
+          break;
+      }
+      return '^' + ch;
+    });
+  }
+
   this.output.write = function(data) {
-    self.logger.write(data);
+    self.logger.write('OUT: ' + stringify(data) + '\n-\n');
     return _write.apply(this, arguments);
   };
+
+  this.input.on('data', function(data) {
+    self.logger.write('IN: ' + stringify(decoder.write(data)) + '\n-\n');
+  });
 };
 
 Program.prototype.setupTput = function() {