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
Collator(const char *)36 Collator::Collator(const char*)
37 {
38 }
39
~Collator()40 Collator::~Collator()
41 {
42 }
43
setOrderLowerFirst(bool)44 void Collator::setOrderLowerFirst(bool)
45 {
46 }
47
userDefault()48 PassOwnPtr<Collator> Collator::userDefault()
49 {
50 return new Collator(0);
51 }
52
53 // A default implementation for platforms that lack Unicode-aware collation.
collate(const UChar * lhs,size_t lhsLength,const UChar * rhs,size_t rhsLength) const54 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