/* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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