API: readFileSync without encoding argument now returns a Buffer

Correctly load utf8 data; add a test test-fs-read-file-sync.js

doc/api.markdown

@@ -1443,10 +1443,15 @@ contents of the file.
 
 If no encoding is specified, then the raw buffer is returned.
 
-### fs.readFileSync(filename, encoding='utf8')
+
+### fs.readFileSync(filename [, encoding])
 
 Synchronous version of `fs.readFile`. Returns the contents of the `filename`.
 
+If `encoding` is specified then this function returns a string. Otherwise it
+returns a buffer.
+
+
 ### fs.writeFile(filename, data, encoding='utf8', callback)
 
 Asynchronously writes data to a file. Example:

lib/fs.js

@@ -88,21 +88,22 @@ fs.readFile = function (path, encoding_, callback) {
 };
 
 fs.readFileSync = function (path, encoding) {
-  encoding = encoding || "utf8"; // default to utf8
+  var fd = fs.openSync(path, process.O_RDONLY, 0666);
+  var stat = fs.statSync(path);
+  var buffer = new Buffer(stat.size);
+  var nread = 0;
 
-  var fd = binding.open(path, process.O_RDONLY, 0666);
+  while (nread < buffer.length) {
-  var content = '';
+    nread += fs.readSync(fd, buffer, nread, buffer.length - nread, null);
-  var pos = null;   // leave null to allow reads on unseekable devices
-  var r;
-
-  while ((r = fs.readSync(fd, 4*1024, pos, encoding)) && r[0]) {
-    content += r[0];
-    pos += r[1]
   }
 
-  binding.close(fd);
+  fs.closeSync(fd);
 
-  return content;
+  if (encoding) {
+    return buffer.toString(encoding);
+  } else {
+    return buffer;
+  }
 };
 
 

lib/module.js

@@ -389,7 +389,7 @@ Module.prototype._compile = function (content, filename) {
 
 
 Module.prototype._loadScriptSync = function (filename) {
-  var content = requireNative('fs').readFileSync(filename);
+  var content = requireNative('fs').readFileSync(filename, 'utf8');
   var e = this._compile(content, filename);
   if (e) {
     throw e;

test/simple/test-crypto.js

@@ -12,9 +12,9 @@ try {
   process.exit();
 } 
 
-var caPem = fs.readFileSync(fixturesDir+"/test_ca.pem");
+var caPem = fs.readFileSync(fixturesDir+"/test_ca.pem", 'ascii');
-var certPem = fs.readFileSync(fixturesDir+"/test_cert.pem");
+var certPem = fs.readFileSync(fixturesDir+"/test_cert.pem", 'ascii');
-var keyPem = fs.readFileSync(fixturesDir+"/test_key.pem");
+var keyPem = fs.readFileSync(fixturesDir+"/test_key.pem", 'ascii');
 
 var credentials = crypto.createCredentials({key:keyPem, cert:certPem, ca:caPem});
 

test/simple/test-fs-read-file-sync.js

@@ -0,0 +1,11 @@
+require('../common');
+
+path = require('path');
+fs = require('fs');
+fn = path.join(fixturesDir, 'elipses.txt');
+
+var s = fs.readFileSync(fn, 'utf8');
+for (var i = 0; i < s.length; i++) {
+  assert.equal("\u2026", s[i]);
+}
+assert.equal(10000, s.length);

test/simple/test-fs-symlink.js

@@ -25,8 +25,8 @@ try {fs.unlinkSync(dstPath);}catch(e){}
 fs.link(srcPath, dstPath, function(err){
   if (err) throw err;
   puts('hard link done');
-  var srcContent = fs.readFileSync(srcPath);
+  var srcContent = fs.readFileSync(srcPath, 'utf8');
-  var dstContent = fs.readFileSync(dstPath);
+  var dstContent = fs.readFileSync(dstPath, 'utf8');
   assert.equal(srcContent, dstContent);
   completed++;
 });

test/simple/test-fs-write-buffer.js

@@ -19,7 +19,7 @@ fs.open(filename, 'w', 0644, function (err, fd) {
     assert.equal(expected.length, written);
     fs.closeSync(fd);
 
-    var found = fs.readFileSync(filename);
+    var found = fs.readFileSync(filename, 'utf8');
     assert.deepEqual(expected.toString(), found);
     fs.unlinkSync(filename);
   });

test/simple/test-http-tls.js

@@ -22,9 +22,9 @@ var request_number = 0;
 var requests_sent = 0;
 var server_response = "";
 var client_got_eof = false;
-var caPem = fs.readFileSync(fixturesDir+"/test_ca.pem");
+var caPem = fs.readFileSync(fixturesDir+"/test_ca.pem", 'ascii');
-var certPem = fs.readFileSync(fixturesDir+"/test_cert.pem");
+var certPem = fs.readFileSync(fixturesDir+"/test_cert.pem", 'ascii');
-var keyPem = fs.readFileSync(fixturesDir+"/test_key.pem");
+var keyPem = fs.readFileSync(fixturesDir+"/test_key.pem", 'ascii');
 
 var credentials = crypto.createCredentials({key:keyPem, cert:certPem, ca:caPem});
 

test/simple/test-tcp-tls.js

@@ -13,9 +13,9 @@ try {
   process.exit();
 } 
 
-var caPem = fs.readFileSync(fixturesDir+"/test_ca.pem");
+var caPem = fs.readFileSync(fixturesDir+"/test_ca.pem", 'ascii');
-var certPem = fs.readFileSync(fixturesDir+"/test_cert.pem");
+var certPem = fs.readFileSync(fixturesDir+"/test_cert.pem", 'ascii');
-var keyPem = fs.readFileSync(fixturesDir+"/test_key.pem");
+var keyPem = fs.readFileSync(fixturesDir+"/test_key.pem", 'ascii');
 
 var credentials = crypto.createCredentials({key:keyPem, cert:certPem, ca:caPem});