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C/C++ Users Group Library 1996 July
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C-C++ Users Group Library July 1996.iso
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v_11_11
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allison
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tbits.c
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1993-08-31
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LISTING 8 - Illustrates Bits Objects
/* tbits.c: Test the Bits Interface */
#include <stdio.h>
#include <assert.h>
#include "bits.h"
#define NBITS 24
main()
{
int i;
unsigned n;
Bits *bp = bits_create(NBITS);
assert(bp);
/* Set the even bits */
for (i = 0; i < NBITS; i += 2)
bits_set(bp,i);
bits_put(bp,stdout);
printf(" (%d)\n",bits_count(bp));
/* Toggle the upper half */
for (i = NBITS/2; i < NBITS; ++i)
bits_toggle(bp,i);
bits_put(bp,stdout);
printf(" (%d)\n",bits_count(bp));
/* Reset the lower half */
for (i = 0; i < NBITS/2; ++i)
bits_reset(bp,i);
bits_put(bp,stdout);
printf(" (%d)\n",bits_count(bp));
/* Read a bit string */
fputs("Enter a bit string: ",stderr);
bits_put(bits_get(bp,stdin),stdout);
printf(" (%d)\n",bits_count(bp));
/* Convert to and from unsigned */
n = bits_to_uint(bp);
printf("n: %u\n",n);
bp = bits_from_uint(bp,n);
bits_put(bp,stdout);
printf(" (%d)\n",bits_count(bp));
/* Test any() and test() */
printf("any? %d\n",bits_any(bp));
printf("test(0)? %d\n",bits_test(bp,0));
/* Test toggle and reset */
bits_put(bits_toggle_all(bp),stdout);
printf(" (%d)\n",bits_count(bp));
bits_put(bits_reset_all(bp),stdout);
printf(" (%d)\n",bits_count(bp));
bits_put(bits_set_all(bp),stdout);
printf(" (%d)\n",bits_count(bp));
return 0;
}
/* Sample Execution:
010101010101010101010101 (12)
101010101010010101010101 (12)
101010101010000000000000 (6)
Enter a bit string: 101001000100001
000000000101001000100001 (5)
n: 21025
000000000101001000100001 (5)
any? 1
test(0)? 1
111111111010110111011110 (19)
000000000000000000000000 (0)
111111111111111111111111 (24)