usr/src/usr.bin/tn3270/general/genbsubs.c

/*
 *      Copyright (c) 1984, 1985, 1986 by the Regents of the
 *      University of California and by Gregory Glenn Minshall.
 *
 *      Permission to use, copy, modify, and distribute these
 *      programs and their documentation for any purpose and
 *      without fee is hereby granted, provided that this
 *      copyright and permission appear on all copies and
 *      supporting documentation, the name of the Regents of
 *      the University of California not be used in advertising
 *      or publicity pertaining to distribution of the programs
 *      without specific prior permission, and notice be given in
 *      supporting documentation that copying and distribution is
 *      by permission of the Regents of the University of California
 *      and by Gregory Glenn Minshall.  Neither the Regents of the
 *      University of California nor Gregory Glenn Minshall make
 *      representations about the suitability of this software
 *      for any purpose.  It is provided "as is" without
 *      express or implied warranty.
 */

#ifndef lint
static  char    sccsid[] = "@(#)genbsubs.c      3.1  10/29/86";
#endif  /* ndef lint */

/* The output of bunequal is the offset of the byte which didn't match;
 * if all the bytes match, then we return n.
 * bunequal(s1, s2, n) */

int
bunequal(s1, s2, n)
register char *s1, *s2;
register n;
{
    register int i = 0;

    while (i++ < n) {
        if (*s1++ != *s2++) {
            break;
        }
    }
    return(i-1);
}

/* bskip(s1, n, b) : finds the first occurrence of any byte != 'b' in the 'n'
 * bytes beginning at 's1'.
 */

int
bskip(s1, n, b)
register char *s1;
register int n;
register int b;
{
    register int i = 0;

    while (i++ < n) {
        if (*s1++ != b) {
            break;
        }
    }
    return(i-1);
}