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+/* This may look like C code, but it is really -*- C++ -*- */
+
+/* Keyword data.
+
+ Copyright (C) 1989-1998, 2000, 2002 Free Software Foundation, Inc.
+ Written by Douglas C. Schmidt <schmidt@ics.uci.edu>
+ and Bruno Haible <bruno@clisp.org>.
+
+ This file is part of GNU GPERF.
+
+ GNU GPERF is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ GNU GPERF is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; see the file COPYING.
+ If not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#ifndef keyword_h
+#define keyword_h 1
+
+/* Class defined in "positions.h". */
+class Positions;
+
+/* An instance of this class is a keyword, as specified in the input file. */
+
+struct Keyword
+{
+ /* Constructor. */
+ Keyword (const char *allchars, int allchars_length,
+ const char *rest);
+
+ /* Data members defined immediately by the input file. */
+ /* The keyword as a string, possibly containing NUL bytes. */
+ const char *const _allchars;
+ int const _allchars_length;
+ /* Additional stuff seen on the same line of the input file. */
+ const char *const _rest;
+ /* Line number of this keyword in the input file. */
+ unsigned int _lineno;
+};
+
+/* A keyword, in the context of a given keyposition list. */
+
+struct KeywordExt : public Keyword
+{
+ /* Constructor. */
+ KeywordExt (const char *allchars, int allchars_length,
+ const char *rest);
+
+ /* Data members depending on the keyposition list. */
+ /* The selected characters that participate for the hash function,
+ selected according to the keyposition list, as a canonically reordered
+ multiset. */
+ const unsigned int * _selchars;
+ int _selchars_length;
+ /* Chained list of keywords having the same _selchars and
+ - if !option[NOLENGTH] - also the same _allchars_length.
+ Note that these duplicates are not members of the main keyword list. */
+ KeywordExt * _duplicate_link;
+
+ /* Methods depending on the keyposition list. */
+ /* Initializes selchars and selchars_length, without reordering. */
+ void init_selchars_tuple (const Positions& positions, const unsigned int *alpha_unify);
+ /* Initializes selchars and selchars_length, with reordering. */
+ void init_selchars_multiset (const Positions& positions, const unsigned int *alpha_unify, const unsigned int *alpha_inc);
+ /* Deletes selchars. */
+ void delete_selchars ();
+
+ /* Data members used by the algorithm. */
+ int _hash_value; /* Hash value for the keyword. */
+
+ /* Data members used by the output routines. */
+ int _final_index;
+
+private:
+ unsigned int * init_selchars_low (const Positions& positions, const unsigned int *alpha_unify, const unsigned int *alpha_inc);
+};
+
+/* An abstract factory for creating Keyword instances.
+ This factory is used to make the Input class independent of the concrete
+ class KeywordExt. */
+
+class Keyword_Factory
+{
+public:
+ /* Constructor. */
+ Keyword_Factory ();
+ /* Destructor. */
+ virtual ~Keyword_Factory ();
+
+ /* Creates a new Keyword. */
+ virtual /*abstract*/ Keyword *
+ create_keyword (const char *allchars, int allchars_length,
+ const char *rest) = 0;
+};
+
+/* A statically allocated empty string. */
+extern char empty_string[1];
+
+#ifdef __OPTIMIZE__
+
+#define INLINE inline
+#include "keyword.icc"
+#undef INLINE
+
+#endif
+
+#endif