?? options.h
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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 modifyit under the terms of the GNU General Public License as published bythe 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 ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See theGNU General Public License for more details.You should have received a copy of the GNU General Public Licensealong with GNU TRIE-GEN; see the file COPYING. If not, write tothe 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 voidOptions::operator = (enum Option_Type opt) /* Enables option OPT. */{ option_word |= opt;}inline voidOptions::operator != (enum Option_Type opt) /* Disables option OPT. */{ option_word &= ~opt;}#endif#endif
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