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Diffstat (limited to 'src/keyword.h')
| -rw-r--r-- | src/keyword.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/src/keyword.h b/src/keyword.h new file mode 100644 index 000000000000..88243506c2e3 --- /dev/null +++ b/src/keyword.h @@ -0,0 +1,116 @@ +/* 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 |