1/*
2 * Copyright (C) 2019 Sony Interactive Entertainment Inc.
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. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "YarrFlags.h"
28
29#include <wtf/OptionSet.h>
30#include <wtf/Optional.h>
31#include <wtf/text/StringView.h>
32
33namespace JSC { namespace Yarr {
34
35Optional<OptionSet<Flags>> parseFlags(StringView string)
36{
37 OptionSet<Flags> flags;
38 for (auto character : string.codeUnits()) {
39 switch (character) {
40 case 'g':
41 if (flags.contains(Flags::Global))
42 return WTF::nullopt;
43 flags.add(Flags::Global);
44 break;
45
46 case 'i':
47 if (flags.contains(Flags::IgnoreCase))
48 return WTF::nullopt;
49 flags.add(Flags::IgnoreCase);
50 break;
51
52 case 'm':
53 if (flags.contains(Flags::Multiline))
54 return WTF::nullopt;
55 flags.add(Flags::Multiline);
56 break;
57
58 case 's':
59 if (flags.contains(Flags::DotAll))
60 return WTF::nullopt;
61 flags.add(Flags::DotAll);
62 break;
63
64 case 'u':
65 if (flags.contains(Flags::Unicode))
66 return WTF::nullopt;
67 flags.add(Flags::Unicode);
68 break;
69
70 case 'y':
71 if (flags.contains(Flags::Sticky))
72 return WTF::nullopt;
73 flags.add(Flags::Sticky);
74 break;
75
76 default:
77 return WTF::nullopt;
78 }
79 }
80
81 return makeOptional(flags);
82}
83
84} } // namespace JSC::Yarr
85