xref: /external/webkit/Source/JavaScriptCore/wtf/unicode/CollatorDefault.cpp

/*
 * Copyright (C) 2008 Apple 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:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  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.
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") 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 APPLE AND ITS 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 APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 */

#include "config.h"
#include "Collator.h"

#if !USE(ICU_UNICODE) || UCONFIG_NO_COLLATION

namespace WTF {

Collator::Collator(const char*)
{
}

Collator::~Collator()
{
}

void Collator::setOrderLowerFirst(bool)
{
}

PassOwnPtr<Collator> Collator::userDefault()
{
    return new Collator(0);
}

// A default implementation for platforms that lack Unicode-aware collation.
Collator::Result Collator::collate(const UChar* lhs, size_t lhsLength, const UChar* rhs, size_t rhsLength) const
{
    int lmin = lhsLength < rhsLength ? lhsLength : rhsLength;
    int l = 0;
    while (l < lmin && *lhs == *rhs) {
        lhs++;
        rhs++;
        l++;
    }

    if (l < lmin)
        return (*lhs > *rhs) ? Greater : Less;

    if (lhsLength == rhsLength)
        return Equal;

    return (lhsLength > rhsLength) ? Greater : Less;
}

}

#endif