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/. */
7 #ifndef mozilla_Dafsa_h
8 #define mozilla_Dafsa_h
12 #include "mozilla/Span.h"
13 #include "nsStringFwd.h"
18 * A deterministic acyclic finite state automaton suitable for storing static
19 * dictionaries of tagged ascii strings. Consider using this if you have a very
20 * large set of strings that need an associated enum value.
22 * Currently the string tag is limited by `make_dafsa.py` to a value of [0-4].
23 * In theory [0-15] can easily be supported.
25 * See `make_dafsa.py` for more details.
29 using Graph
= Span
<const uint8_t>;
32 * Initializes the DAFSA with a binary encoding generated by `make_dafsa.py`.
34 explicit Dafsa(const Graph
& aData
) : mData(aData
) {}
39 * Searches for the given string in the DAFSA.
41 * @param aKey The string to search for.
42 * @returns kKeyNotFound if not found, otherwise the associated tag.
44 int Lookup(const nsACString
& aKey
) const;
46 static const int kKeyNotFound
;
52 } // namespace mozilla
54 #endif // mozilla_Dafsa_h