/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_Dafsa_h #define mozilla_Dafsa_h
#include"stdint.h"
#include"mozilla/Span.h" #include"nsStringFwd.h"
namespace mozilla {
/** * A deterministic acyclic finite state automaton suitable for storing static * dictionaries of tagged ascii strings. Consider using this if you have a very * large set of strings that need an associated enum value. * * Currently the string tag is limited by `make_dafsa.py` to a value of [0-4]. * In theory [0-15] can easily be supported. * * See `make_dafsa.py` for more details.
*/ class Dafsa { public: using Graph = Span<const uint8_t>;
/** * Initializes the DAFSA with a binary encoding generated by `make_dafsa.py`.
*/ explicit Dafsa(const Graph& aData) : mData(aData) {}
~Dafsa() = default;
/** * Searches for the given string in the DAFSA. * * @param aKey The string to search for. * @returns kKeyNotFound if not found, otherwise the associated tag.
*/ int Lookup(const nsACString& aKey) const;
staticconstint kKeyNotFound;
private: const Graph mData;
};
} // namespace mozilla
#endif// mozilla_Dafsa_h
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