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/*
* File: bitvec.c
*
* Copyright 2001 Jorge Arellano Cid <jcid@dillo.org>
*
* This program 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 3 of the License, or
* (at your option) any later version.
*/
/*
* A simple ADT for bit arrays
*/
#include "../dlib/dlib.h"
#include "bitvec.h"
/*
* Create a new bitvec with 'num_bits' size
*/
bitvec_t *a_Bitvec_new(int num_bits)
{
bitvec_t *bvec = dNew(bitvec_t, 1);
bvec->vec = dNew0(uchar_t, num_bits/BVEC_SIZE + 1);
bvec->len = num_bits;
return bvec;
}
/*
* Clear a bitvec
*/
void a_Bitvec_clear(bitvec_t *bvec)
{
memset(bvec->vec, 0, sizeof(uchar_t) * bvec->len/BVEC_SIZE + 1);
}
/*
* Free a bitvec
*/
void a_Bitvec_free(bitvec_t *bvec)
{
if (bvec) {
dFree(bvec->vec);
dFree(bvec);
}
}
/*
* Get a bit
*/
int a_Bitvec_get_bit(bitvec_t *bvec, int pos)
{
dReturn_val_if_fail (pos < bvec->len, 0);
return (bvec->vec[pos/BVEC_SIZE] & 1 << pos % BVEC_SIZE);
}
/*
* Set a bit
*/
void a_Bitvec_set_bit(bitvec_t *bvec, int pos)
{
dReturn_if_fail (pos < bvec->len);
bvec->vec[pos/BVEC_SIZE] |= 1 << (pos % BVEC_SIZE);
}
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