Source/core/frame/DOMWindowBase64.cpp

/*
 * 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
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 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include "config.h"
#include "core/frame/DOMWindowBase64.h"

#include "bindings/v8/ExceptionState.h"
#include "core/dom/ExceptionCode.h"
#include "core/html/parser/HTMLParserIdioms.h"
#include "wtf/text/Base64.h"

namespace WebCore {

namespace DOMWindowBase64 {

String btoa(void*, const String& stringToEncode, ExceptionState& exceptionState)
{
    if (stringToEncode.isNull())
        return String();

    if (!stringToEncode.containsOnlyLatin1()) {
        exceptionState.throwDOMException(InvalidCharacterError, "The string to be encoded contains characters outside of the Latin1 range.");
        return String();
    }

    return base64Encode(stringToEncode.latin1());
}

String atob(void*, const String& encodedString, ExceptionState& exceptionState)
{
    if (encodedString.isNull())
        return String();

    if (!encodedString.containsOnlyLatin1()) {
        exceptionState.throwDOMException(InvalidCharacterError, "The string to be decoded contains characters outside of the Latin1 range.");
        return String();
    }
    Vector<char> out;
    if (!base64Decode(encodedString, out, isHTMLSpace<UChar>, Base64ValidatePadding)) {
        exceptionState.throwDOMException(InvalidCharacterError, "The string to be decoded is not correctly encoded.");
        return String();
    }

    return String(out.data(), out.size());
}

} // namespace DOMWindowBase64

} // namespace WebCore