binary.c File Reference

Contains binary conversion functions sbinary and bitsSet. More...

#include "mdb.h"

Go to the source code of this file.

Functions
char *	sbinary (char *s, int len, long number)
long	bitsSet (unsigned long data)
	Counts the number of set bits (1s) in the given data.

Detailed Description

Contains binary conversion functions sbinary and bitsSet.

Copyright

• (c) 2002 The University of Chicago, as Operator of Argonne National Laboratory.
• (c) 2002 The Regents of the University of California, as Operator of Los Alamos National Laboratory.

License

This file is distributed under the terms of the Software License Agreement found in the file LICENSE included with this distribution.

Author

M. Borland, C. Saunders, R. Soliday

Definition in file binary.c.

Function Documentation

bitsSet()

long bitsSet

(

unsigned long

data

)

Counts the number of set bits (1s) in the given data.

This function iterates through each bit of the provided unsigned long integer and counts how many bits are set to 1.

Parameters

data	The unsigned long integer to count set bits in.

Returns

The number of set bits.

Definition at line 52 of file binary.c.

                                 {
  long i = 0;
  while (data) {
    if (data & 1)
      i++;
    data >>= 1;
  }
  return i;
}

sbinary()

char * sbinary	(	char *	s,
		int	len,
		long	number )

Definition at line 18 of file binary.c.

                                             {
  long pow_of_2, n, i;
  char c;
 
  pow_of_2 = 1;
  n = 0;
  strcpy_ss(s, "0");
  while (pow_of_2 > 0 && pow_of_2 <= number && n < len - 1) {
    if (pow_of_2 & number) {
      number -= pow_of_2;
      s[n] = '1';
    } else
      s[n] = '0';
    s[++n] = 0;
    pow_of_2 = pow_of_2 << 1;
  }
  i = -1;
  while (--n > ++i) {
    c = s[n];
    s[n] = s[i];
    s[i] = c;
  }
  return (s);
}