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- /* This may look like C code, but it is really -*- C++ -*- */
-
- /* Simple lookup table abstraction implemented as an Iteration Number Array.
-
- 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. */
-
- /* Define and implement a simple boolean array abstraction,
- uses an Iteration Numbering implementation to save on initialization time. */
-
- #ifndef bool_array_h
- #define bool_array_h 1
-
- #include <std.h>
- #include "trace.h"
-
- #ifdef LO_CAL
- /* If we are on a memory diet then we'll only make these use a limited
- amount of storage space. */
- typedef unsigned short STORAGE_TYPE;
- #else
- typedef int STORAGE_TYPE;
- #endif
-
- class Bool_Array
- {
- private:
- static STORAGE_TYPE *storage_array; /* Initialization of the index space. */
- static STORAGE_TYPE iteration_number; /* Keep track of the current iteration. */
- static int size; /* Keep track of array size. */
-
- public:
- Bool_Array (void);
- ~Bool_Array (void);
- static void init (STORAGE_TYPE *buffer, STORAGE_TYPE s);
- static int find (int hash_value);
- static void reset (void);
- };
-
- #ifdef __OPTIMIZE__ /* efficiency hack! */
-
- inline
- Bool_Array::Bool_Array (void)
- {
- T (Trace t ("Bool_Array::Bool_Array");)
- storage_array = 0;
- iteration_number = size = 0;
- }
-
- inline void
- Bool_Array::init (STORAGE_TYPE *buffer, STORAGE_TYPE s)
- {
- T (Trace t ("Bool_Array::init");)
- size = s;
- iteration_number = 1;
- storage_array = buffer;
- memset (storage_array, 0, s * sizeof *storage_array);
- if (option[DEBUG])
- fprintf (stderr, "\nbool array size = %d, total bytes = %d\n",
- size, size * sizeof *storage_array);
- }
-
- inline int
- Bool_Array::find (int index)
- {
- T (Trace t ("Bool_Array::find");)
- if (storage_array[index] == iteration_number)
- return 1;
- else
- {
- storage_array[index] = iteration_number;
- return 0;
- }
- }
-
- inline void
- Bool_Array::reset (void)
- {
- T (Trace t ("Bool_Array::reset");)
- if (++iteration_number == 0)
- {
- if (option[DEBUG])
- {
- fprintf (stderr, "(re-initializing bool_array)...");
- fflush (stderr);
- }
- iteration_number = 1;
- memset (storage_array, 0, size * sizeof *storage_array);
- if (option[DEBUG])
- {
- fprintf (stderr, "done\n");
- fflush (stderr);
- }
- }
- }
- #endif
-
- #endif
-