gecko-dev/intl/unicharutil/util/nsUnicharUtils.h

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
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 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Unicode case conversion helpers.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corp..
 * Portions created by the Initial Developer are Copyright (C) 2002
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Alec Flett <alecf@netscape.com>
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#ifndef nsUnicharUtils_h__
#define nsUnicharUtils_h__
#ifndef nsAString_h___
#include "nsAString.h"
#endif

class nsASingleFragmentString;
class nsString;

void ToLowerCase( nsAString& );
void ToUpperCase( nsAString& );

void ToLowerCase( nsASingleFragmentString& );
void ToUpperCase( nsASingleFragmentString& );

void ToLowerCase( nsString& );
void ToUpperCase( nsString& );

void ToLowerCase( const nsAString& aSource, nsAString& aDest );
void ToUpperCase( const nsAString& aSource, nsAString& aDest );

PRBool CaseInsensitiveFindInReadable( const nsAString& aPattern, nsAString::const_iterator&, nsAString::const_iterator& );

class nsCaseInsensitiveStringComparator
    : public nsStringComparator
  {
    public:
      virtual int operator()( const PRUnichar*, const PRUnichar*, PRUint32 aLength ) const;
      virtual int operator()( PRUnichar, PRUnichar ) const;
  };


PRUnichar ToUpperCase(PRUnichar);
PRUnichar ToLowerCase(PRUnichar);

inline PRBool IsUpperCase(PRUnichar c) {
    return ToLowerCase(c) != c;
}

inline PRBool IsLowerCase(PRUnichar c) {
    return ToUpperCase(c) != c;
}

#define IS_HIGH_SURROGATE(u)  ((PRUnichar)(u) >= (PRUnichar)0xd800 && (PRUnichar)(u) <= (PRUnichar)0xdbff)
#define IS_LOW_SURROGATE(u)  ((PRUnichar)(u) >= (PRUnichar)0xdc00 && (PRUnichar)(u) <= (PRUnichar)0xdfff)

#define SURROGATE_TO_UCS4(h, l)  ((((PRUint32)(h)-(PRUint32)0xd800) << 10) +  \
                                    (PRUint32)(l) - (PRUint32)(0xdc00) + 0x10000)


#endif  /* nsUnicharUtils_h__ */