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77 lines
1.2 KiB
77 lines
1.2 KiB
#include <math.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <string.h>
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#include <assert.h>
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#include "error.h"
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#include "maa.h"
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#include "bfilter.h"
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int countbits(int n) {
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int c = 0;
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while (n >>= 1) {
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c++;
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}
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return c+1;
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}
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int
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printbits(int n) {
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int c = countbits(n);
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int i = c;
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int *bits = malloc((sizeof (int)) * c);
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while (n >= 2) {
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bits[i-1] = n & 1;
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i--;
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n >>= 1;
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}
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bits[i-1] = n & 1;
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for (int i = 0; i < c; i++) {
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printf("%d", bits[i]);
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}
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printf("\n");
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free(bits);
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return 0;
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}
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int*
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new_bitarray(int size) {
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int *barray = malloc((sizeof (int)) * size);
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int i;
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for(i = 0; i < size; i++) {
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barray[i] = 0;
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}
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return barray;
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}
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int
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setbit(int* arr, int k) {
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/* The position in the array of the int we're looking at */
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int i = k/32;
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/* The position of the bit in the int itself */
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int pos = k % 32;
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unsigned int flag = 1;
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/* Shift the flag to the position of the bit we want to set */
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flag = flag << pos;
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arr[i] = arr[i] | flag;
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return 0;
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}
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int
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main (void) {
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int *test = new_bitarray(5);
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setbit(test, 6);
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setbit(test, 4);
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setbit(test, 2);
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printbits(test[0]);
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return EXIT_SUCCESS;
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}
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