From 7bf31b8c1c6b6cbb4cf2456983f597d070537d0f Mon Sep 17 00:00:00 2001
From: Peteris Krumins <peteris.krumins@gmail.com>
Date: Sat, 23 Mar 2013 03:03:02 +0200
Subject: [PATCH] @gabrielf's patches to make it work on node 0.10

---
 lazy.js | 139 +++++++++++++++++++++++++++++++++-----------------------
 1 file changed, 82 insertions(+), 57 deletions(-)

diff --git a/lazy.js b/lazy.js
index 9ff3520..fbdf2a4 100644
--- a/lazy.js
+++ b/lazy.js
@@ -1,15 +1,13 @@
 var EventEmitter = require('events').EventEmitter;
+var util = require('util');
+var stream = require('stream');
 
-Lazy.prototype = new EventEmitter;
-module.exports = Lazy;
-function Lazy (em, opts) {
+function Lazy(em, opts) {
     if (!(this instanceof Lazy)) return new Lazy(em, opts);
+    EventEmitter.call(this);
     var self = this;
-    if (em) {
-        if (!em._events) em._events = {};
-        self._events = em._events;
-    }
-    
+
+
     self.once = function (name, f) {
         self.on(name, function g () {
             self.removeListener(name, g);
@@ -38,18 +36,46 @@ function Lazy (em, opts) {
         self.emit(endName);
     }
     
-    function newLazy (g, h) {
-        if (!g) g = function () { return true };
-        if (!h) h = function (x) { return x };
-        var lazy = new Lazy(null, opts);
-        self.on(dataName, function (x) {
-            if (g.call(lazy, x)) lazy.emit(dataName, h(x));
+    if (em && em.on) {
+        em.on(endName, function () {
+            self.emit(endName);
         });
-        self.once(pipeName, function () {
-            lazy.emit(pipeName)
+        self.on(pipeName, function () {
+            em.emit(pipeName);
         });
-        self.once(endName, function () {
-            lazy.emit(endName)
+        // Check for v0.10 or Greater (Stream2 has Duplex type)
+        if (stream.Duplex && em instanceof(stream)) {
+            em.on('readable', function () {
+                var x = em.read();
+                self.emit(dataName, x);
+            });
+        } else {
+            // Old Stream1 or Event support
+            em.on(dataName, function (x) {
+                self.emit(dataName, x);
+            });
+        }
+    }
+    
+    function newLazy (g, h, l) {
+        if (!g) {
+            g = function () {
+                return true;
+            };
+        }
+        if (!h) {
+            h = function (x) {
+                return x;
+            };
+        }
+        var lazy = new Lazy(null, opts, l);
+        self.on(dataName, function (x, y) {
+            if (g.call(lazy, x)) {
+                lazy.emit(dataName, h(x), y);
+            }
+        });
+        self.once(pipeName, function () {
+            lazy.emit(pipeName);
         });
         return lazy;
     }
@@ -148,68 +174,63 @@ function Lazy (em, opts) {
         lazy.once(pipeName, function () { f(data) });
         return self;
     }
- 
+
     self.bucket = function (init, f) {
         var lazy = new Lazy(null, opts);
-        var yield = function (x) {
+        var yieldTo = function (x) {
             lazy.emit(dataName, x);
         };
-        
+
         var acc = init;
-        
+
         self.on(dataName, function (x) {
-            acc = f.call(yield, acc, x);
+            acc = f.call(yieldTo, acc, x);
         });
-        
+
         self.once(pipeName, function () {
-            lazy.emit(pipeName)
+            lazy.emit(pipeName);
         });
-        
+
         // flush on end event
         self.once(endName, function () {
             var finalBuffer = mergeBuffers(acc);
-            if(finalBuffer) yield(finalBuffer);
-            lazy.emit(endName)
+            if (finalBuffer) {
+                yieldTo(finalBuffer);
+            }
         });
-        
+
         return lazy;
     }
-    
+
     // Streams that use this should emit strings or buffers only
     self.__defineGetter__('lines', function () {
         return self.bucket([], function (chunkArray, chunk) {
-            var newline = ['\r'.charCodeAt(0), '\n'.charCodeAt(0)], lastNewLineIndex = 0;
+            var newline = '\n'.charCodeAt(0), lastNewLineIndex = 0;
             if (typeof chunk === 'string') chunk = new Buffer(chunk);
-            
-            for (var i = 0; i < chunk.length; i++) {
-              // Match line separator characters
-              if (newline.indexOf(chunk[i]) !== -1) {
-                // If we have content from the current chunk to append to our buffers, do it.
-                if(i>0){
-                  if(i === lastNewLineIndex){
-                    lastNewLineIndex = i-1;
-                  }
-                  chunkArray.push(chunk.slice(lastNewLineIndex, i));
-                } 
-                
-                // Skip second separator byte on \r\n terminated lines ( yeah, stupid DOS / Windows, I know... )
-                if ((i + 1 < chunk.length) && (chunk[i] === newline[0]) && (chunk[i + 1] === newline[1])) {
-                  i++;
-                }
 
-                // Wrap all our buffers and emit it.
-                this(mergeBuffers(chunkArray));
+            for (var i = 0; i < chunk.length; i++) {
+                if (chunk[i] === newline) {
+                    // If we have content from the current chunk to append to our buffers, do it.
+                    if (i > 0) {
+                        chunkArray.push(chunk.slice(lastNewLineIndex, i));
+                    }
 
-                lastNewLineIndex = i + 1;
-              }
+                    // Wrap all our buffers and emit it.
+                    this(mergeBuffers(chunkArray));
+                    lastNewLineIndex = i + 1;
+                }
             }
-            
-            if(lastNewLineIndex>0) { 
-              // New line found in the chunk, push the remaining part of the buffer.
-              if(lastNewLineIndex < chunk.length) chunkArray.push(chunk.slice(lastNewLineIndex));
+
+            if (lastNewLineIndex > 0) {
+                // New line found in the chunk, push the remaining part of the buffer.
+                if (lastNewLineIndex < chunk.length) {
+                    chunkArray.push(chunk.slice(lastNewLineIndex));
+                }
             } else {
-              // No new line found, push the whole buffer.
-              if(chunk.length) chunkArray.push(chunk);
+                // No new line found, push the whole buffer.
+                if (chunk.length) {
+                    chunkArray.push(chunk);
+                }
             }
             return chunkArray;
         });
@@ -321,3 +342,7 @@ var mergeBuffers = function mergeBuffers(buffers) {
   
   return finalBuffer;
 }
+
+
+util.inherits(Lazy, EventEmitter);
+module.exports = Lazy;