OpenEuphoria

Editing a hex file?

• Posted by tonysteward May 27, 2013
• 1267 views

I have a bin file which is a hex dump from an eeprom. Please see image https://dl.dropboxusercontent.com/u/8952255/ScreenClip.png

I want to replace the highlighted characters with 6 digits entered into a text box. So if a users enters 323453 for example then these character must be in the highlighted section. File size and location will never change.

Here is how I have read the file but i'm not sure how to replace the parts of the file I want.

integer fn 
integer len 
integer test 
sequence tt 
atom aa 
 
fn = open("Lagard.bin", "rb")  -- an existing file 
 
sequence whole_file 
whole_file = {} 
 
sequence chunk 
 
while 1 do 
    chunk = get_bytes(fn, 16) -- read 100 bytes at a time 
    whole_file &= chunk        -- chunk might be empty, that's ok 
    if length(chunk) < 16 then 
        exit 
    end if 
end while 
 
close(fn)