source: buchla-68k/orig/CLIBRARY/STRNCMP.C@ 0170798

/*
   =============================================================================
        strncmp.c -- compare strings
        Version 2 -- 1987-06-15

        Compare strings (at most n bytes)
        Returns: s1>s2; >0  s1==s2; 0  s1<s2; <0
   =============================================================================
*/

int
strncmp(s1, s2, n)
register char *s1, *s2;
register int n;
{
        if (s1 == s2)
                return(0);

        while ((--n >= 0) && (*s1 == *s2++))
                if(*s1++ == '\0')
                        return(0);

        return((n < 0) ? 0 : (int)(*s1 - *--s2));
}