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81 lines
2.6 KiB
C++
81 lines
2.6 KiB
C++
/* This may look like C code, but it is really -*- C++ -*- */
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/* Keyword data.
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Copyright (C) 1989-1998, 2000, 2002 Free Software Foundation, Inc.
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Written by Bruno Haible <bruno@clisp.org>.
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This file is part of GNU GPERF.
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GNU GPERF is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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GNU GPERF is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU GPERF; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
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#ifndef keyword_h
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#define keyword_h 1
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#include "vectors.h"
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/* An instance of this class is a keyword, as specified in the input file. */
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struct Keyword
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{
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/* Constructor. */
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Keyword (const char *allchars, int allchars_length, const char *rest);
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/* Data members defined immediately by the input file. */
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/* The keyword as a string, possibly containing NUL bytes. */
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const char *const allchars;
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const int allchars_length;
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/* Additional stuff seen on the same line of the input file. */
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const char *const rest;
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};
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/* A keyword, in the context of a given keyposition list. */
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struct KeywordExt : public Keyword
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{
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/* Constructor. */
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KeywordExt (const char *allchars, int allchars_length, const char *rest);
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/* Data members depending on the keyposition list. */
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/* The selected characters that participate for the hash function,
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reordered according to the keyposition list. */
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const char * selchars;
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int selchars_length;
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/* Chained list of keywords having the same selchars. */
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KeywordExt * duplicate_link;
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/* Methods depending on the keyposition list. */
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/* Initialize selchars and selchars_length, and update v->occurrences. */
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void init_selchars (Vectors *v);
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/* Data members used by the algorithm. */
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int occurrence; /* A metric for frequency of key set occurrences. */
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int hash_value; /* Hash value for the key. */
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/* Data members used by the output routines. */
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int final_index;
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};
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/* A factory for creating Keyword instances. */
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class Keyword_Factory
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{
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public:
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Keyword_Factory ();
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virtual ~Keyword_Factory ();
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/* Creates a new Keyword. */
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virtual Keyword * create_keyword (const char *allchars, int allchars_length,
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const char *rest) = 0;
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};
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#endif
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