Solved

How to convert a binary file into ASCII format?

Posted on 2006-11-16
4
7,786 Views
Last Modified: 2013-11-15
I have a binary file and I want the same to convert into ASCII format with symbols,i,e in a readable format.Please tell me the steps to follow....

1) How can I read a binary file which contain all 0's and 1's .
0
Comment
Question by:tatikor_143
  • 2
4 Comments
 
LVL 16

Expert Comment

by:imladris
ID: 17957013
There are many ways this could be done. I suspect you have something specific in mind, or that you, at least, won't like some of the options. The first question is what do you want the output to look like. If you consider the following sequence of bytes in a file (shown in hexadecimal):

41 42 01 05 43 4F

This could be rendered in ASCII in a  number of ways.

1. Show the corresponding ASCII character:  A B (open face) (club) C O
    One drawback here is that lots of bytes don't correspond to well defined or printable characters.
    1 and 5 are often used as control codes.

2. Show the nibbles; that is, show each half byte (nibble) as a character from 0 to ?: 4 1 4 2 0 1 0 5 4 3 ?
    This ensures that everything is printable.

3. Show all the ones and zeroes:  01000001 01000010 00000001 00000101 01000011 01001111
    The drawback here is that the printout will be very long.

4. Show it in hex as above: 41 42 01 05 43 4F

To read a binary file under windows you open it in binary mode:

#include <stdio.h>
char buf[100];
FILE *fp;

fp=fopen("thefile","rb");
fread(buf,100,1,fp);

and you have the first 100 bytes in buf. Then you need to process them in some way to show them as you want to.
0
 
LVL 16

Expert Comment

by:imladris
ID: 17957031
To show those 100 bytes in hex you could do something simple like:

int i;

for(i=0; i<100; ++i)printf("%x ",buf[i]);
printf("\n");
0
 
LVL 45

Accepted Solution

by:
Kdo earned 500 total points
ID: 17958159

Hi guys,

My guess is that the poster has a binary file such as a .exe, .jpg, .dbf, etc.  Formatting this is a snap.


You can pipe this into a program designed to format this or just open the file and read it.  Your choice.

To do the actual formatting, just use printf() or fprintf()


main ()  // read file from stdin
{
  char ch;
  int    bytes;

  bytes = 0;
  while (1)
  {
    ch = fgetc (stding)
    if (feof(stdin))
      break;

    fprintf (stdout, " %d> %2.2x %c\n", bytes, ch, ch < 0x80 && ch >= ' ' ? ch : ' ');
    ++bytes;
  }
}


This will print something like:

 0> 54 T
 1> 65 e
 2> 73 s
 3> 74 t
 4> 20


etc....

Good Luck,
Kent
0
 
LVL 22

Expert Comment

by:grg99
ID: 17959765
What's in the file?   characters?    numbers?    bytes, words, longs?   signed or unsigned?

0

Featured Post

Backup Your Microsoft Windows Server®

Backup all your Microsoft Windows Server – on-premises, in remote locations, in private and hybrid clouds. Your entire Windows Server will be backed up in one easy step with patented, block-level disk imaging. We achieve RTOs (recovery time objectives) as low as 15 seconds.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Software doesn't automaticly start up 5 65
Visual xHarbour 1 88
How to add a m3u Playlist to IPTV on PLEX 7 3,882
What is atomic operation? 6 45
I previously wrote an article addressing the use of UBCD4WIN and SARDU. All are great, but I have always been an advocate of SARDU. Recently it was suggested that I go back and take a look at Easy2Boot in comparison.
In this article, you will read about the trends across the human resources departments for the upcoming year. Some of them include improving employee experience, adopting new technologies, using HR software to its full extent, and integrating artifi…
The viewer will learn how to create multiple layers to apply various filters and how to delete areas from each layer’s filter.
The viewer will learn how to successfully download and install the SARDU utility on Windows 7, without downloading adware.

914 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

19 Experts available now in Live!

Get 1:1 Help Now