Move btoa() / atob() implementation out of DOMWindow

Source/core/page/DOMWindowBase64.cpp

Index: Source/core/page/DOMWindowBase64.cpp
diff --git a/Source/modules/webmidi/MIDIOutput.cpp b/Source/core/page/DOMWindowBase64.cpp
similarity index 62%
copy from Source/modules/webmidi/MIDIOutput.cpp
copy to Source/core/page/DOMWindowBase64.cpp
index e9066f0561fc600d24a8c1dd0fe59623522c6950..736668c68d29d8c5a344421d1aa205a5e68efdd2 100644
--- a/Source/modules/webmidi/MIDIOutput.cpp
+++ b/Source/core/page/DOMWindowBase64.cpp
@@ -1,5 +1,7 @@
 /*
- * Copyright (C) 2013 Google Inc. All rights reserved.
+ * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
+ * Copyright (C) 2013 Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ -29,32 +31,46 @@
  */
 
 #include "config.h"
-#include "modules/webmidi/MIDIOutput.h"
+#include "core/page/DOMWindowBase64.h"
+
+#include "wtf/text/Base64.h"
 
 namespace WebCore {
 
-PassRefPtr<MIDIOutput> MIDIOutput::create(ScriptExecutionContext* context, const String& id, const String& manufacturer, const String& name, const String& version)
-{
-    return adoptRef(new MIDIOutput(context, id, manufacturer, name, version));
-}
+namespace DOMWindowBase64 {
 
-MIDIOutput::MIDIOutput(ScriptExecutionContext* context, const String& id, const String& manufacturer, const String& name, const String& version)
-    : MIDIPort(context, id, manufacturer, name, MIDIPortTypeOutput, version)
+String btoa(void*, const String& stringToEncode, ExceptionCode& ec)
 {
-    ScriptWrappable::init(this);
-}
+    if (stringToEncode.isNull())
+        return String();
 
-void MIDIOutput::send(Uint8Array* data, double timestamp)
-{
-    // FIXME: Implement MIDI protocol validation here. System exclusive
-    // messages must be checked at the same time.
-    // Actual sending operation will be implemented in core/platform/midi.
+    if (!stringToEncode.containsOnlyLatin1()) {
+        ec = InvalidCharacterError;
+        return String();
+    }
+
+    return base64Encode(stringToEncode.latin1());
 }
 
-void MIDIOutput::send(Vector<unsigned>, double timestamp)
+String atob(void*, const String& encodedString, ExceptionCode& ec)
 {
-    // FIXME: Ditto. Implementation will be shared between these two send
-    // functions.
+    if (encodedString.isNull())
+        return String();
+
+    if (!encodedString.containsOnlyLatin1()) {
+        ec = InvalidCharacterError;
+        return String();
+    }
+
+    Vector<char> out;
+    if (!base64Decode(encodedString, out, Base64FailOnInvalidCharacter)) {
+        ec = InvalidCharacterError;
+        return String();
+    }
+
+    return String(out.data(), out.size());
 }
 
+} // namespace DOMWindowBase64
+
 } // namespace WebCore