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- /* This may look like C code, but it is really -*- C++ -*- */
-
- /* Handles parsing the Options provided to the user.
-
- Copyright (C) 1989 Free Software Foundation, Inc.
- written by Douglas C. Schmidt (schmidt@ics.uci.edu)
-
- This file is part of GNU TRIE-GEN.
-
- GNU TRIE-GEN 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 1, or (at your option)
- any later version.
-
- GNU TRIE-GEN 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 GNU TRIE-GEN; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* This module provides a uniform interface to the various options available
- to a user of the minimal-prefix trie generator.
- The overall design of this module was an experiment in using C++
- classes as a mechanism to enhance centralization of option and
- and error handling, which tend to get out of hand in a C program. */
-
- #ifndef options_h
- #define options_h 1
-
- /* Enumerate the potential debugging Options. */
-
- enum Option_Type
- {
- DEBUG = 01, /* Enable debugging option. */
- COMPACT = 02, /* Compact the output tables. */
- FULL = 04, /* Generate a full table. */
- CONST = 010, /* Make the generated tables readonly (const). */
- };
-
- /* Class manager for program options. */
-
- class Options
- {
- public:
- Options (void);
- ~Options (void);
- const char *program_name (void);
- int operator[] (Option_Type option);
- void operator() (int argc, char *argv[]);
- void operator= (enum Option_Type);
- void operator!= (enum Option_Type);
- static void print_options (void);
-
- private:
- static int option_word; /* Holds the user-specified Options. */
- static int argument_count;
- static char **argument_vector;
- static void usage (void); /* Prints proper program usage. */
- };
-
- /* Global option coordinator for the entire program. */
- extern Options option;
-
- #ifdef __OPTIMIZE__
- inline const char *
- Options::program_name (void)
- {
- return argument_vector[0];
- }
-
- inline int
- Options::operator[] (Option_Type option) /* True if option enable, else false. */
- {
- return option_word & option;
- }
-
- inline void
- Options::operator = (enum Option_Type opt) /* Enables option OPT. */
- {
- option_word |= opt;
- }
-
- inline void
- Options::operator != (enum Option_Type opt) /* Disables option OPT. */
- {
- option_word &= ~opt;
- }
-
- #endif
- #endif
-