OpenEuphoria

Re: It seems simple...

• Posted by Sabal Mike <MikeS at NOTATIONS.COM> Dec 13, 2000
• 425 views

>From library.doc

Seek (move) to any byte position in the file fn or to the end of
              file if i2 is -1. For each open file there is a current byt=
e
              position that is updated as a result of I/O operations on t=
he
              file. The initial file position is 0 for files opened for r=
ead,
              write or update. The initial position is the end of file fo=
r
              files opened for append. The value returned by seek() is 0 =
if the
              seek was successful, and non-zero if it was unsuccessful. I=
t is
              possible to seek past the end of a file. In this case undef=
ined
              bytes will be added to the file to make it long enough for =
the
              seek.

=AF assumes fn is already defined and opened
atom fpos
fpos =3D seek(fn,-1)
if fpos=3D0 then
  fpos=3Dwhere(fn)
  fpos=3Dseek(fn,fpos-127)
end if
=AF assuming both seeks were successful, you are now 128 bytes prior to t=
he end of the file.

Michael J. Sabal


>>> impee3 at EXCITE.COM 12/13/00 01:11PM >>>
I'm trying to open a binary file for read only, go to the last 128 bytes =
in
the file, and read that string. Seems simple, right? I'm at the point whe=
re
I can't find an equivalent Euphoria routine that I'd use if I were writin=
g
this in VB. In VB, I'd use -- FileLen(FileName) - 127 -- to do what I'm
trying. I tried to use get_bytes, but to no avail. Can anybody send me a
snippet of code that'll do what I need?

Seek() would work fine for moving the placement of the next reading to 12=
8
bytes from the end of the file, but getting the actual length of the file=
 is
where I'm stuck.

Thanks,
Brian