usr/src/usr.bin/hexdump/bpad.c

/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)bpad.c      5.2 (Berkeley) %G%";
#endif /* not lint */

#include <sys/types.h>
#include <stdio.h>
#include <ctype.h>
#include "hexdump.h"

bpad(fu, pr)
        FU *fu;
        PR *pr;
{
        register char *p1, *p2;

        /*
         * the format string has no more data to print out.  Go through
         * the rest of the format string, and, for all non-%s conversions,
         * replace with %s and remove any conversion flags that don't
         * apply to %s.  This should replace any output with an equivalent
         * number of spaces.
         */
        for (;;) {
                if (fu->flags&F_IGNORE)
                        continue;
                for (; pr; pr = pr->nextpr) {
                        if (pr->flags == F_TEXT)
                                continue;
                        pr->flags = F_BPAD;
                        *pr->cchar = 's';
                        /* remove conversion flags %s can't handle. */
                        for (p1 = p2 = pr->fmt; *p1; *p2++ = *p1++)
                                if (*p1 == '%') {
                                        static char *spec1 = "-0+ #";
                                        static char *spec2 = ".0123456789";

                                        *p2++ = *p1;
                                        while (index(spec1, *++p1))
                                                if (*p1 == '-')
                                                        *p2++ = '-';
                                        while (index(spec2, *p2++ = *p1++));
                                }
                        *p2 = '\0';
                }
                if (!(fu = fu->nextfu))
                        break;
                pr = fu->nextpr;
        }
}