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      1 /*
      2  * Copyright (C) 2008 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     14  *     its contributors may be used to endorse or promote products derived
     15  *     from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include "config.h"
     30 #include "Collator.h"
     31 
     32 #if !USE(ICU_UNICODE) || UCONFIG_NO_COLLATION
     33 
     34 namespace WTF {
     35 
     36 Collator::Collator(const char*)
     37 {
     38 }
     39 
     40 Collator::~Collator()
     41 {
     42 }
     43 
     44 void Collator::setOrderLowerFirst(bool)
     45 {
     46 }
     47 
     48 std::auto_ptr<Collator> Collator::userDefault()
     49 {
     50     return std::auto_ptr<Collator>(new Collator(0));
     51 }
     52 
     53 // A default implementation for platforms that lack Unicode-aware collation.
     54 Collator::Result Collator::collate(const UChar* lhs, size_t lhsLength, const UChar* rhs, size_t rhsLength) const
     55 {
     56     int lmin = lhsLength < rhsLength ? lhsLength : rhsLength;
     57     int l = 0;
     58     while (l < lmin && *lhs == *rhs) {
     59         lhs++;
     60         rhs++;
     61         l++;
     62     }
     63 
     64     if (l < lmin)
     65         return (*lhs > *rhs) ? Greater : Less;
     66 
     67     if (lhsLength == rhsLength)
     68         return Equal;
     69 
     70     return (lhsLength > rhsLength) ? Greater : Less;
     71 }
     72 
     73 }
     74 
     75 #endif
     76