117 lines
4.0 KiB
C++
117 lines
4.0 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 Douglas C. Schmidt <schmidt@ics.uci.edu>
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and 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 2, 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 this program; see the file COPYING.
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If not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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#ifndef keyword_h
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#define keyword_h 1
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/* Class defined in "positions.h". */
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class Positions;
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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,
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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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int const _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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/* Line number of this keyword in the input file. */
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unsigned int _lineno;
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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,
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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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selected according to the keyposition list, as a canonically reordered
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multiset. */
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const unsigned int * _selchars;
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int _selchars_length;
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/* Chained list of keywords having the same _selchars and
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- if !option[NOLENGTH] - also the same _allchars_length.
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Note that these duplicates are not members of the main keyword list. */
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KeywordExt * _duplicate_link;
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/* Methods depending on the keyposition list. */
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/* Initializes selchars and selchars_length, without reordering. */
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void init_selchars_tuple (const Positions& positions, const unsigned int *alpha_unify);
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/* Initializes selchars and selchars_length, with reordering. */
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void init_selchars_multiset (const Positions& positions, const unsigned int *alpha_unify, const unsigned int *alpha_inc);
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/* Deletes selchars. */
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void delete_selchars ();
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/* Data members used by the algorithm. */
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int _hash_value; /* Hash value for the keyword. */
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/* Data members used by the output routines. */
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int _final_index;
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private:
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unsigned int * init_selchars_low (const Positions& positions, const unsigned int *alpha_unify, const unsigned int *alpha_inc);
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};
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/* An abstract factory for creating Keyword instances.
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This factory is used to make the Input class independent of the concrete
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class KeywordExt. */
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class Keyword_Factory
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{
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public:
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/* Constructor. */
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Keyword_Factory ();
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/* Destructor. */
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virtual ~Keyword_Factory ();
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/* Creates a new Keyword. */
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virtual /*abstract*/ Keyword *
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create_keyword (const char *allchars, int allchars_length,
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const char *rest) = 0;
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};
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/* A statically allocated empty string. */
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extern char empty_string[1];
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#ifdef __OPTIMIZE__
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#define INLINE inline
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#include "keyword.icc"
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#undef INLINE
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#endif
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#endif
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