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/* Fast lookup table abstraction implemented as a Guilmette 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 "boolarray.h"
#include "options.h"
/* Locally visible BOOL_ARRAY object. */
static BOOL_ARRAY bool_array;
/* Prints out debugging diagnostics. */
void
bool_array_destroy ()
{
if (OPTION_ENABLED (option, DEBUG))
fprintf (stderr, "\ndumping boolean array information\niteration number = %d\nend of array dump\n",
bool_array.iteration_number);
free ((char *) bool_array.storage_array);
}
void
bool_array_init (size)
int size;
{
STORAGE_TYPE *xmalloc ();
bool_array.iteration_number = 1;
bool_array.size = size;
bool_array.storage_array = xmalloc (size * sizeof *bool_array.storage_array);
bzero (bool_array.storage_array, size * sizeof *bool_array.storage_array);
if (OPTION_ENABLED (option, DEBUG))
fprintf (stderr, "\nbool array size = %d, total bytes = %d\n",
bool_array.size, bool_array.size * sizeof *bool_array.storage_array);
}
bool
lookup (index)
int index;
{
if (bool_array.storage_array[index] == bool_array.iteration_number)
return 1;
else
{
bool_array.storage_array[index] = bool_array.iteration_number;
return 0;
}
}
/* Simple enough to reset, eh?! */
void
bool_array_reset ()
{
/* If we wrap around it's time to zero things out again! */
if (++bool_array.iteration_number == 0)
{
if (OPTION_ENABLED (option, DEBUG))
{
fprintf (stderr, "(re-initializing bool_array)...");
fflush (stderr);
}
bool_array.iteration_number = 1;
bzero (bool_array.storage_array, bool_array.size * sizeof *bool_array.storage_array);
if (OPTION_ENABLED (option, DEBUG))
{
fprintf (stderr, "done\n");
fflush (stderr);
}
}
}
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