/*

 * 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.

 */

#ifndef WebCString_h

#define WebCString_h

#include "WebCommon.h"

#if WEBKIT_IMPLEMENTATION

namespace WTF { class CString; }

#else

#include <string>

#endif

namespace WebKit {

class WebCStringPrivate;

class WebString;

// A single-byte string container with unspecified encoding.  It is

// inexpensive to copy a WebCString object.

//

// WARNING: It is not safe to pass a WebCString across threads!!!

//

class WebCString {

public:

    ~WebCString() { reset(); }

    WebCString() : m_private(0) { }

    WebCString(const char* data, size_t len) : m_private(0)

    {

        assign(data, len);

    }

    WebCString(const WebCString& s) : m_private(0) { assign(s); }

    WebCString& operator=(const WebCString& s)

    {

        assign(s);

        return *this;

    }

    // Returns 0 if both strings are equals, a value greater than zero if the

    // first character that does not match has a greater value in this string

    // than in |other|, or a value less than zero to indicate the opposite.

    WEBKIT_API int compare(const WebCString& other) const;

    WEBKIT_API void reset();

    WEBKIT_API void assign(const WebCString&);

    WEBKIT_API void assign(const char* data, size_t len);

    WEBKIT_API size_t length() const;

    WEBKIT_API const char* data() const;

    bool isEmpty() const { return !length(); }

    bool isNull() const { return !m_private; }

    WEBKIT_API WebString utf16() const;

    WEBKIT_API static WebCString fromUTF16(const WebUChar* data, size_t length);

    WEBKIT_API static WebCString fromUTF16(const WebUChar* data);

#if WEBKIT_IMPLEMENTATION

    WebCString(const WTF::CString&);

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

    operator WTF::CString() const;

#else

    WebCString(const std::string& s) : m_private(0)

    {

        assign(s.data(), s.length());

    }

    WebCString& operator=(const std::string& s)

    {

        assign(s.data(), s.length());

        return *this;

    }

    operator std::string() const

    {

        size_t len = length();

        return len ? std::string(data(), len) : std::string();

    }

    template <class UTF16String>

    static WebCString fromUTF16(const UTF16String& s)

    {

        return fromUTF16(s.data(), s.length());

    }

#endif

private:

    void assign(WebCStringPrivate*);

    WebCStringPrivate* m_private;

};

inline bool operator<(const WebCString& a, const WebCString& b)

{

    return a.compare(b) < 0;

}

} // namespace WebKit

#endif