.ref-BSD-4_3_Net_2/usr/src/contrib/isode/psap/strb2int.c

/* converts a bit string - output of bitstr2strb() - to an integer */

#ifndef lint
static char *rcsid = "$Header: /f/osi/psap/RCS/strb2int.c,v 7.1 91/02/22 09:37:12 mrose Interim $";
#endif

/*
 * $Header: /f/osi/psap/RCS/strb2int.c,v 7.1 91/02/22 09:37:12 mrose Interim $
 *
 *
 * $Log:        strb2int.c,v $
 * Revision 7.1  91/02/22  09:37:12  mrose
 * Interim 6.8
 *
 * Revision 7.0  89/11/23  22:13:51  mrose
 * Release 6.0
 *
 */

/*
 *                                NOTICE
 *
 *    Acquisition, use, and distribution of this module and related
 *    materials are subject to the restrictions of a license agreement.
 *    Consult the Preface in the User's Manual for the full terms of
 *    this agreement.
 *
 */


/* LINTLIBRARY */

#include <stdio.h>
#include "psap.h"


int     strb2int (cp, len)
register char   *cp;
register int    len;
{
    register int    i,
                    j,
                    bit,
                    mask,
                    n;

    n = 0;
    for (bit = (*cp & 0xff), i = 0, mask = 1 << (j = 7); i < len; i++) {
        if (bit & mask)
            n |= 1 << i;
        if (j-- == 0)
            bit = *++cp & 0xff, mask = 1 << (j = 7);
        else
            mask >>= 1;
    }

    return n;
}