1/*
2 * Copyright (C) 2012, 2016 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 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include <wtf/NotFound.h>
29#include <wtf/PrintStream.h>
30
31namespace JSC {
32
33struct MatchResult;
34#if CPU(ADDRESS32)
35using EncodedMatchResult = uint64_t;
36#else
37using EncodedMatchResult = MatchResult;
38#endif
39
40struct MatchResult {
41 MatchResult()
42 : start(WTF::notFound)
43 , end(0)
44 {
45 }
46
47 ALWAYS_INLINE MatchResult(size_t start, size_t end)
48 : start(start)
49 , end(end)
50 {
51 }
52
53#if CPU(ADDRESS32)
54 ALWAYS_INLINE MatchResult(EncodedMatchResult match)
55 : start(bitwise_cast<MatchResult>(match).start)
56 , end(bitwise_cast<MatchResult>(match).end)
57 {
58 }
59#endif
60
61 ALWAYS_INLINE static MatchResult failed()
62 {
63 return MatchResult();
64 }
65
66 ALWAYS_INLINE explicit operator bool() const
67 {
68 return start != WTF::notFound;
69 }
70
71 ALWAYS_INLINE bool empty()
72 {
73 return start == end;
74 }
75
76 void dump(PrintStream&) const;
77
78 size_t start;
79 size_t end;
80};
81
82static_assert(sizeof(EncodedMatchResult) == 2 * sizeof(size_t), "https://bugs.webkit.org/show_bug.cgi?id=198518#c11");
83static_assert(sizeof(MatchResult) == sizeof(EncodedMatchResult), "Match result and EncodedMatchResult should be the same size");
84
85} // namespace JSC
86