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Rework Bool_Array.

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This commit is contained in:
Bruno Haible
2002-10-30 12:36:40 +00:00
parent c7f32d582f
commit a07f46bd1d
6 changed files with 59 additions and 66 deletions
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37
src/bool-array.icc
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@@ -24,56 +24,47 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
//#include <string.h>
//#include "options.h"
/* Initializes the bit array with room for s bits, numbered from 0 to s-1. */
INLINE
Bool_Array::Bool_Array (void)
Bool_Array::Bool_Array (unsigned int s)
: size (s), iteration_number (1), storage_array (new unsigned int [s])
{
storage_array = 0;
iteration_number = size = 0;
}
INLINE void
Bool_Array::init (unsigned int *buffer, unsigned int s)
{
size = s;
iteration_number = 1;
storage_array = buffer;
memset (storage_array, 0, s * sizeof (*storage_array));
memset (storage_array, 0, s * sizeof (unsigned int));
if (option[DEBUG])
fprintf (stderr, "\nbool array size = %d, total bytes = %d\n",
size, (unsigned int) (size * sizeof (*storage_array)));
}
/* Sets the specified bit to one. Returns its previous value (0 or 1). */
INLINE int
Bool_Array::find (int index)
Bool_Array::set_bit (unsigned int index)
{
if (storage_array[index] == iteration_number)
/* The bit was set since the last clear() call. */
return 1;
else
{
/* The last operation on this bit was clear(). Set it now. */
storage_array[index] = iteration_number;
return 0;
}
}
/* Resets all bits to zero. */
INLINE void
Bool_Array::reset (void)
Bool_Array::clear (void)
{
/* 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! */
occurs once about every 2^32 iterations, so it will not happen more
frequently than once per second. */
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));
memset (storage_array, 0, size * sizeof (unsigned int));
if (option[DEBUG])
{
fprintf (stderr, "done\n");
fprintf (stderr, "(re-initialized bool_array)\n");
fflush (stderr);
}
}