modfiy caller

lib/fileByteReader.js

@@ -10,43 +10,47 @@ var b = function(file,cb){
 	var callback = !cb ? function(){}:cb;
 	fs.open(file,'r',function(err,fd) {
 		if(err) {
-			callback(err);
+			callback.call(bSelf,err);
 			return;
 		}
 		bSelf.fd = fd;
 		fs.fstat(fd,function(err,stat) {
 			if(err) {
-				callback(err);
+				callback.call(bSelf,err);
 				return;
 			}
 			bSelf.tol = stat.size;
-			callback(undefined,bSelf);
+			callback.call(bSelf);
 		});
 	});
 };
 
 b.prototype.read = function(cb) {
 	if(this.start >= this.tol ) {
-		cb(undefined,undefined,this);
+		cb.call(this,undefined,undefined,this);
 		return;
 	}
 	var len = this.tol-this.start;
-	len = len > defaultBufSize ? defaultBufSize : len
+	len = len > defaultBufSize ? defaultBufSize : len;
 	this.start += len;
 
 	var buf = new Buffer(len);
 	var bSelf = this;
 	fs.read(this.fd,buf,0,buf.length,null,function(err,size,buffer) {
 		if(err) {
-			cb(err);
+			cb.call(bSelf,err);
 			return;
 		}
-		cb(err,buffer,bSelf);
+		cb.call(bSelf,err,buffer);
 	});
 };
 
 b.prototype.close = function(cb){
-	fs.close(this.fd,cb);
+	var bSelf = this;
+	var callback = !cb ? function(){} : cb;
+	fs.close(this.fd,function(){
+		callback.call(bSelf);
+	});
 	this.start = 0;
 	this.tol = 0;
 };

test/aReader.js

@@ -4,19 +4,19 @@ var assert = require('assert');
 var path = __dirname + "/a";
 
 var i = 0;
-var readCB = function(err,buf,fbr) {
+var readCB = function(err,buf) {
 	if(!buf) {
-		fbr.close();
+		this.close();
 		return;
 	}
 	assert.equal(buf.toString().split('\n')[i],i+1,'fail 1 ea');
 	i++;
-	fbr.read(readCB);
+	this.read(readCB);
 };
-new FileByteReader(path,function(err,fbr){
+new FileByteReader(path,function(err){
 	if(err) {
 		console.error(err);
 		return;
 	}
-	fbr.read(readCB);
+	this.read(readCB);
 });