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
33typedef uint64_t EncodedMatchResult;
34
35struct MatchResult {
36 MatchResult()
37 : start(WTF::notFound)
38 , end(0)
39 {
40 }
41
42 ALWAYS_INLINE MatchResult(size_t start, size_t end)
43 : start(start)
44 , end(end)
45 {
46 }
47
48 explicit ALWAYS_INLINE MatchResult(EncodedMatchResult encoded)
49 {
50 union u {
51 uint64_t encoded;
52 struct s {
53 size_t start;
54 size_t end;
55 } split;
56 } value;
57 value.encoded = encoded;
58 start = value.split.start;
59 end = value.split.end;
60 }
61
62 ALWAYS_INLINE static MatchResult failed()
63 {
64 return MatchResult();
65 }
66
67 ALWAYS_INLINE explicit operator bool() const
68 {
69 return start != WTF::notFound;
70 }
71
72 ALWAYS_INLINE bool empty()
73 {
74 return start == end;
75 }
76
77 void dump(PrintStream&) const;
78
79 size_t start;
80 size_t end;
81};
82
83} // namespace JSC
84