/work/obj-fuzz/dist/include/nsStaticAtomUtils.h
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1 | | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
2 | | /* vim: set ts=8 sts=2 et sw=2 tw=80: */ |
3 | | /* This Source Code Form is subject to the terms of the Mozilla Public |
4 | | * License, v. 2.0. If a copy of the MPL was not distributed with this |
5 | | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
6 | | |
7 | | #ifndef nsStaticAtomUtils_h |
8 | | #define nsStaticAtomUtils_h |
9 | | |
10 | | #include <stdint.h> |
11 | | #include "nsAtom.h" |
12 | | #include "mozilla/ArrayUtils.h" |
13 | | #include "mozilla/Maybe.h" |
14 | | |
15 | | // This class holds basic operations on arrays of static atoms. |
16 | | class nsStaticAtomUtils |
17 | | { |
18 | | public: |
19 | | static mozilla::Maybe<uint32_t> Lookup(nsAtom* aAtom, |
20 | | const nsStaticAtom* aAtoms, |
21 | | uint32_t aCount) |
22 | 0 | { |
23 | 0 | if (aAtom->IsStatic()) { |
24 | 0 | ptrdiff_t index = aAtom->AsStatic() - aAtoms; |
25 | 0 | if (index >= 0 && index < static_cast<ptrdiff_t>(aCount)) { |
26 | 0 | return mozilla::Some(static_cast<uint32_t>(index)); |
27 | 0 | } |
28 | 0 | } |
29 | 0 | return mozilla::Nothing(); |
30 | 0 | } |
31 | | |
32 | | static bool IsMember(nsAtom* aAtom, const nsStaticAtom* aAtoms, |
33 | | uint32_t aCount) |
34 | 0 | { |
35 | 0 | return Lookup(aAtom, aAtoms, aCount).isSome(); |
36 | 0 | } |
37 | | }; |
38 | | |
39 | | #endif // nsStaticAtomUtils_h |