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- /* Fast 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. */
-
- #include <stdio.h>
- #include "options.h"
- #include "bool-array.h"
-
- STORAGE_TYPE * Bool_Array::storage_array;
- STORAGE_TYPE Bool_Array::iteration_number;
- int Bool_Array::size;
-
- /* Prints out debugging diagnostics. */
-
- Bool_Array::~Bool_Array (void)
- {
- T (Trace t ("Bool_Array::~Bool_Array");)
- if (option[DEBUG])
- fprintf (stderr, "\ndumping boolean array information\n"
- "size = %d\niteration number = %d\nend of array dump\n",
- size, iteration_number);
- }
-
- #ifndef __OPTIMIZE__
-
- Bool_Array::Bool_Array (void)
- {
- T (Trace t ("Bool_Array::Bool_Array");)
- storage_array = 0;
- iteration_number = size = 0;
- }
-
- 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);
- }
-
- 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;
- }
- }
-
- void
- Bool_Array::reset (void)
- {
- T (Trace t ("Bool_Array::reset");)
- /* If we wrap around it's time to zero things out again! However, this only
- occurs once about every 2^31 or 2^15 iterations, so it should probably
- never happen! */
-
- 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 /* not defined __OPTIMIZE__ */
-