busybox

/* vi: set sw=4 ts=4: */

/*

 * Support code for the hexdump and od applets,

 * based on code from util-linux v 2.11l

 *

 * Copyright (c) 1989

 *  The Regents of the University of California.  All rights reserved.

 *

 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.

 *

 * Original copyright notice is retained at the end of this file.

 */

​

#include "libbb.h"

#include "dump.h"

​

enum _vflag bb_dump_vflag = FIRST;

FS *bb_dump_fshead;             /* head of format strings */

static FU *endfu;

static char **_argv;

static off_t savaddress;    /* saved address/offset in stream */

static off_t eaddress;  /* end address */

static off_t address;   /* address/offset in stream */

off_t bb_dump_skip;             /* bytes to skip */

static int exitval;         /* final exit value */

int bb_dump_blocksize;          /* data block size */

int bb_dump_length = -1;        /* max bytes to read */

​

static const char index_str[] = ".#-+ 0123456789";

​

static const char size_conv_str[] =

"\x1\x4\x4\x4\x4\x4\x4\x8\x8\x8\x8\010cdiouxXeEfgG";

​

static const char lcc[] = "diouxX";

​

int bb_dump_size(FS * fs)

{

    FU *fu;

    int bcnt, cur_size;

    char *fmt;

    const char *p;

    int prec;

​

    /* figure out the data block bb_dump_size needed for each format unit */

    for (cur_size = 0, fu = fs->nextfu; fu; fu = fu->nextfu) {

        if (fu->bcnt) {

            cur_size += fu->bcnt * fu->reps;

            continue;

        }

        for (bcnt = prec = 0, fmt = fu->fmt; *fmt; ++fmt) {

            if (*fmt != '%')

                continue;

            /*

             * bb_dump_skip any special chars -- save precision in

             * case it's a %s format.

             */

            while (strchr(index_str + 1, *++fmt));

            if (*fmt == '.' && isdigit(*++fmt)) {

                prec = atoi(fmt);

                while (isdigit(*++fmt));

            }

            if (!(p = strchr(size_conv_str + 12, *fmt))) {

                if (*fmt == 's') {