source: MondoRescue/branches/2.2.5/mindi-busybox/util-linux/hexdump.c@ 1765

/* vi: set sw=4 ts=4: */
/*
 * hexdump implementation for busybox
 * 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.
 */

#include <getopt.h>
#include "libbb.h"
#include "dump.h"

/* This is a NOEXEC applet. Be very careful! */


static void bb_dump_addfile(char *name)
{
    char *p;
    FILE *fp;
    char *buf;

    fp = xfopen(name, "r");

    while ((buf = xmalloc_getline(fp)) != NULL) {
        p = skip_whitespace(buf);

        if (*p && (*p != '#')) {
            bb_dump_add(p);
        }
        free(buf);
    }
    fclose(fp);
}

static const char *const add_strings[] = {
    "\"%07.7_ax \" 16/1 \"%03o \" \"\\n\"",     /* b */
    "\"%07.7_ax \" 16/1 \"%3_c \" \"\\n\"",     /* c */
    "\"%07.7_ax \" 8/2 \"  %05u \" \"\\n\"",    /* d */
    "\"%07.7_ax \" 8/2 \" %06o \" \"\\n\"",     /* o */
    "\"%07.7_ax \" 8/2 \"   %04x \" \"\\n\"",   /* x */
};

static const char add_first[] ALIGN1 = "\"%07.7_Ax\n\"";

static const char hexdump_opts[] ALIGN1 = "bcdoxCe:f:n:s:v";

static const struct suffix_mult suffixes[] = {
    { "b", 512 },
    { "k", 1024 },
    { "m", 1024*1024 },
    { }
};

int hexdump_main(int argc, char **argv);
int hexdump_main(int argc, char **argv)
{
    const char *p;
    int ch;

    bb_dump_vflag = FIRST;
    bb_dump_length = -1;

    while ((ch = getopt(argc, argv, hexdump_opts)) > 0) {
        p = strchr(hexdump_opts, ch);
        if (!p)
            bb_show_usage();
        if ((p - hexdump_opts) < 5) {
            bb_dump_add(add_first);
            bb_dump_add(add_strings[(int)(p - hexdump_opts)]);
        } else if (ch == 'C') {
            bb_dump_add("\"%08.8_Ax\n\"");
            bb_dump_add("\"%08.8_ax  \" 8/1 \"%02x \" \"  \" 8/1 \"%02x \" ");
            bb_dump_add("\"  |\" 16/1 \"%_p\" \"|\\n\"");
        } else {
            /* Save a little bit of space below by omitting the 'else's. */
            if (ch == 'e') {
                bb_dump_add(optarg);
            } /* else */
            if (ch == 'f') {
                bb_dump_addfile(optarg);
            } /* else */
            if (ch == 'n') {
                bb_dump_length = xatoi_u(optarg);
            } /* else */
            if (ch == 's') {
                bb_dump_skip = xatoul_range_sfx(optarg, 0, LONG_MAX, suffixes);
            } /* else */
            if (ch == 'v') {
                bb_dump_vflag = ALL;
            }
        }
    }

    if (!bb_dump_fshead) {
        bb_dump_add(add_first);
        bb_dump_add("\"%07.7_ax \" 8/2 \"%04x \" \"\\n\"");
    }

    argv += optind;

    return bb_dump_dump(argv);
}