/*

 * Copyright (C) 2009 Google Inc. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are

 * met:

 *

 *     * Redistributions of source code must retain the above copyright

 * notice, this list of conditions and the following disclaimer.

 *     * Redistributions in binary form must reproduce the above

 * copyright notice, this list of conditions and the following disclaimer

 * in the documentation and/or other materials provided with the

 * distribution.

 *     * Neither the name of Google Inc. nor the names of its

 * contributors may be used to endorse or promote products derived from

 * this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include "config.h"

#include "WebCString.h"

#include "TextEncoding.h"

#include <wtf/text/CString.h>

#include "WebString.h"

namespace WebKit {

class WebCStringPrivate : public WTF::CStringBuffer {

};

int WebCString::compare(const WebCString& other) const

{

    // A null string is always less than a non null one.

    if (isNull() != other.isNull())

        return isNull() ? -1 : 1;

    if (isNull())

        return 0; // Both WebStrings are null.

    return strcmp(m_private->data(), other.m_private->data());

}

void WebCString::reset()

{

    if (m_private) {

        m_private->deref();

        m_private = 0;

    }

}

void WebCString::assign(const WebCString& other)

{

    assign(const_cast<WebCStringPrivate*>(other.m_private));

}

void WebCString::assign(const char* data, size_t length)

{

    char* newData;

    RefPtr<WTF::CStringBuffer> buffer =

        WTF::CString::newUninitialized(length, newData).buffer();

    memcpy(newData, data, length);

    assign(static_cast<WebCStringPrivate*>(buffer.get()));

}

size_t WebCString::length() const

{

    if (!m_private)

        return 0;

    // NOTE: The buffer's length includes the null byte.

    return const_cast<WebCStringPrivate*>(m_private)->length() - 1;

}

const char* WebCString::data() const

{

    if (!m_private)

        return 0;

    return const_cast<WebCStringPrivate*>(m_private)->data();

}

WebString WebCString::utf16() const

{

    return WebCore::UTF8Encoding().decode(data(), length());

}

WebCString WebCString::fromUTF16(const WebUChar* data, size_t length)

{

    return WebCore::UTF8Encoding().encode(

        data, length, WebCore::QuestionMarksForUnencodables);

}

WebCString WebCString::fromUTF16(const WebUChar* data)

{

    size_t len = 0;

    while (data[len] != WebUChar(0))

        len++;

    return fromUTF16(data, len);

}

WebCString::WebCString(const WTF::CString& s)

    : m_private(static_cast<WebCStringPrivate*>(s.buffer()))

{

    if (m_private)

        m_private->ref();

}

WebCString& WebCString::operator=(const WTF::CString& s)

{

    assign(static_cast<WebCStringPrivate*>(s.buffer()));

    return *this;

}

WebCString::operator WTF::CString() const

{

    return m_private;

}

void WebCString::assign(WebCStringPrivate* p)

{

    // Take care to handle the case where m_private == p

    if (p)

        p->ref();

    if (m_private)

        m_private->deref();

    m_private = p;

}

} // namespace WebKit