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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 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 1, 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 GNU GPERF; 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 gperf hash function generator. In addition to the
- run-time options, found in the Option_Type below, there is also the
- hash table Size and the Keys to be used in the hashing.
- 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
-
- #include "std-err.h"
- #include "trace.h"
-
- /* Enumerate the potential debugging Options. */
-
- enum Option_Type
- {
- DEBUG = 01, /* Enable debugging (prints diagnostics to Std_Err). */
- ORDER = 02, /* Apply ordering heuristic to speed-up search time. */
- ANSI = 04, /* Generate ANSI prototypes. */
- ALLCHARS = 010, /* Use all characters in hash function. */
- GNU = 020, /* Assume GNU extensions (primarily function inline). */
- TYPE = 040, /* Handle user-defined type structured keyword input. */
- RANDOM = 0100, /* Randomly initialize the associated values table. */
- DEFAULTCHARS = 0200, /* Make default char positions be 1,$ (end of keyword). */
- SWITCH = 0400, /* Generate switch output to save space. */
- POINTER = 01000, /* Have in_word_set function return pointer, not boolean. */
- NOLENGTH = 02000, /* Don't include keyword length in hash computations. */
- LENTABLE = 04000, /* Generate a length table for string comparison. */
- DUP = 010000, /* Handle duplicate hash values for keywords. */
- FAST = 020000, /* Generate the hash function ``fast.'' */
- NOTYPE = 040000, /* Don't include user-defined type definition in output -- it's already defined elsewhere. */
- COMP = 0100000, /* Generate strncmp rather than strcmp. */
- GLOBAL = 0200000, /* Make the keyword table a global variable. */
- CONST = 0400000, /* Make the generated tables readonly (const). */
- CPLUSPLUS = 01000000, /* Generate C++ code. */
- C = 02000000, /* Generate C code. */
- ENUM = 04000000, /* Use enum for constants. */
- };
-
- /* Define some useful constants (these don't really belong here, but I'm
- not sure where else to put them!). These should be consts, but g++
- doesn't seem to do the right thing with them at the moment... ;-( */
-
- enum
- {
- MAX_KEY_POS = 128 - 1, /* Max size of each word's key set. */
- WORD_START = 1, /* Signals the start of a word. */
- WORD_END = 0, /* Signals the end of a word. */
- EOS = MAX_KEY_POS, /* Signals end of the key list. */
- };
-
- /* Class manager for gperf program Options. */
-
- class Options : private Std_Err
- {
- public:
- Options (void);
- ~Options (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);
- static void set_asso_max (int r);
- static int get_asso_max (void);
- static void reset (void);
- static int get (void);
- static int get_iterations (void);
- static int get_max_keysig_size (void);
- static void set_keysig_size (int);
- static int get_jump (void);
- static int initial_value (void);
- static int get_total_switches (void);
- static const char *get_function_name (void);
- static const char *get_key_name (void);
- static const char *get_class_name (void);
- static const char *get_hash_name (void);
- static const char *get_delimiter (void);
-
- private:
- static int option_word; /* Holds the user-specified Options. */
- static int total_switches; /* Number of switch statements to generate. */
- static int total_keysig_size; /* Total number of distinct key_positions. */
- static int size; /* Range of the hash table. */
- static int key_pos; /* Tracks current key position for Iterator. */
- static int jump; /* Jump length when trying alternative values. */
- static int initial_asso_value; /* Initial value for asso_values table. */
- static int argument_count; /* Records count of command-line arguments. */
- static int iterations; /* Amount to iterate when a collision occurs. */
- static char **argument_vector; /* Stores a pointer to command-line vector. */
- static const char *function_name; /* Names used for generated lookup function. */
- static const char *key_name; /* Name used for keyword key. */
- static const char *class_name; /* Name used for generated C++ class. */
- static const char *hash_name; /* Name used for generated hash function. */
- static const char *delimiters; /* Separates keywords from other attributes. */
- static char key_positions[MAX_KEY_POS]; /* Contains user-specified key choices. */
- static int key_sort (char *base, int len); /* Sorts key positions in REVERSE order. */
- static void usage (void); /* Prints proper program usage. */
- };
-
- /* Global option coordinator for the entire program. */
- extern Options option;
-
- #ifdef __OPTIMIZE__
-
- inline int
- Options::operator[] (Option_Type option) /* True if option enable, else false. */
- {
- T (Trace t ("Options::operator[]");)
- 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;
- }
-
- inline void
- Options::reset (void) /* Initializes the key Iterator. */
- {
- T (Trace t ("Options::reset");)
- key_pos = 0;
- }
-
- inline int
- Options::get (void) /* Returns current key_position and advanced index. */
- {
- T (Trace t ("Options::get");)
- return key_positions[key_pos++];
- }
-
- inline void
- Options::set_asso_max (int r) /* Sets the size of the table size. */
- {
- T (Trace t ("Options::set_asso_max");)
- size = r;
- }
-
- inline int
- Options::get_asso_max (void) /* Returns the size of the table size. */
- {
- T (Trace t ("Options::get_asso_max");)
- return size;
- }
-
- inline int
- Options::get_max_keysig_size (void) /* Returns total distinct key positions. */
- {
- T (Trace t ("Options::get_max_keysig_size");)
- return total_keysig_size;
- }
-
- inline void
- Options::set_keysig_size (int size) /* Sets total distinct key positions. */
- {
- T (Trace t ("Options::set_keysig_size");)
- total_keysig_size = size;
- }
-
- inline int
- Options::get_jump (void) /* Returns the jump value. */
- {
- T (Trace t ("Options::get_jump");)
- return jump;
- }
-
- inline const char *
- Options::get_function_name (void) /* Returns the generated function name. */
- {
- T (Trace t ("Options::get_function_name");)
- return function_name;
- }
-
- inline const char *
- Options::get_key_name (void) /* Returns the keyword key name. */
- {
- T (Trace t ("Options::get_key_name");)
- return key_name;
- }
-
- inline const char *
- Options::get_hash_name (void) /* Returns the hash function name. */
- {
- T (Trace t ("Options::get_hash_name");)
- return hash_name;
- }
-
- inline const char *
- Options::get_class_name (void) /* Returns the generated class name. */
- {
- T (Trace t ("Options::get_class_name");)
- return class_name;
- }
-
- inline int
- Options::initial_value (void) /* Returns the initial associated character value. */
- {
- T (Trace t ("Options::initial_value");)
- return initial_asso_value;
- }
-
- inline int
- Options::get_iterations (void) /* Returns the iterations value. */
- {
- T (Trace t ("Options::get_iterations");)
- return iterations;
- }
-
- inline const char *
- Options::get_delimiter () /* Returns the string used to delimit keywords from other attributes. */
- {
- T (Trace t ("Options::get_delimiter");)
- return delimiters;
- }
-
- inline int
- Options::get_total_switches () /* Gets the total number of switch statements to generate. */
- {
- T (Trace t ("Options::get_total_switches");)
- return total_switches;
- }
- #endif
-
- #endif
-