gen-perf.h

早期freebsd实现

/* This may look like C code, but it is really -*- C++ -*- */

/* Provides high-level routines to manipulate the keyword list
   structures the code generation output. 

   Copyright (C) 1989 Free Software Foundation, Inc.
   written by Douglas C. Schmidt ([e-mail])

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.  */

#ifndef gen_perf_h
#define gen_perf_h 1

#include "std-err.h"
#include "key-list.h"
#include "bool-array.h"

class Gen_Perf : private Key_List, private Bool_Array
{
private:
  int         max_hash_value;    /* Maximum possible hash value. */
  int         fewest_collisions; /* Records fewest # of collisions for asso value. */
  int         num_done;          /* Number of keywords processed without a collision. */
  
  void        change (List_Node *prior, List_Node *curr);
  int         affects_prev (char c, List_Node *curr);
  static int  hash (List_Node *key_node);
  static int  compute_disjoint_union (char *set_1, char *set_2, char *set_3);
  static void sort_set (char *union_set, int len);
  
public:
              Gen_Perf (void);
             ~Gen_Perf (void);
  int         operator () (void);
};
#endif