зеркало из https://github.com/mozilla/gecko-dev.git
55 строки
1.4 KiB
C++
55 строки
1.4 KiB
C++
/* -*- 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;
|
|
|
|
static const int kKeyNotFound;
|
|
|
|
private:
|
|
const Graph mData;
|
|
};
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_Dafsa_h
|