OpenEuphoria

Re: dos.e

• Posted by Derek Parnell <ddparnell at bigpond.com> May 18, 2002
• 404 views

Good work, J. Maybe not many people use DOS anymore 

----- Original Message -----
From: <jluethje at gmx.de>
To: "EUforum" <EUforum at topica.com>
Subject: dos.e


>
> Hi all,
>
> there are some bugs in dos.e (from Archive/Library Routines)
> -- tested with Euphoria 2.3:
>
>
> =============================[ deltree() ]==============================
>
> <code>
> global function deltree(string dirname)
>    [...]
>    if not compare(dirname[length(dirname)], "\\") then
>       dirname = dirname[1..length(dirname)-1]
>    end if
> </code>
>
> The condition   compare(dirname[length(dirname)], "\\")
> is *always* -1, because dirname[length(dirname)] is an atom, and
> "\\" is a sequence.
>
> So the statement   dirname = dirname[1..length(dirname)-1]   will
> *never* be executed, and therefore the function will not work properly,
> when called with a dirname that has a backslash at the end.
>
> ==> It should be:  if not compare(dirname[length(dirname)], '\\') then
>     or (clearer):  if dirname[length(dirname)] = '\\' then
>
> ----------------------------------------
>
> Also in function deltree:
>
> <code>
>    info = dir(dirname)
>    [...]
>    if not match(info[loop][D_ATTRIBUTES],"d") then
>       i = delete(dirname & "\\" & info[loop][D_NAME])
> </code>
>
> For a normal file, info[loop][D_ATTRIBUTES] is "", and then the error
> "first argument of match() must be a non-empty sequence" is raised.
> (BTW: I think this information should be included in the documentation
>       for match().)
>
> Furthermore, eg match("da", "d") = 0, which means that the routine will
> try to delete() a directory with the attributes "da", for instance
> (which will not work, of cause).
>
> ==> It should be:  if not find('d', info[loop][D_ATTRIBUTES]) then
>
> ----------------------------------------
> This is my modified deltree() function:
> ----------------------------------------
>
> global function deltree (string dirname)
>    object info
>    integer i
>
>    if dirname[length(dirname)] = '\\' then
>       dirname = dirname[1..length(dirname)-1]
>    end if
>    info = dir(dirname)
>    if atom(info) then
>       return false
>    end if
>    if length(info) < 3 then
>       return rmdir(dirname)
>    end if
>    info = info[3..length(info)]
>    for loop = 1 to length(info) do
>       if not find('d', info[loop][D_ATTRIBUTES]) then
>          i = delete(dirname & "\\" & info[loop][D_NAME])
>          if not i then
>             return false
>          end if
>       else
>          i = deltree(dirname & "\\" & info[loop][D_NAME])
>          if not i then
>             return false
>          end if
>          i = rmdir(dirname & "\\" & info[loop][D_NAME])
>       end if
>    end for
>    return rmdir(dirname)
> end function
>
>
> ==============================[ rename() ]==============================
>
> <code>
> global function rename(string oldname, string newname)
>    [...]
>    if (not compare(oldname[2],":")) and (not compare(newname[2],":"))
> then
> </code>
>
> ==> It should be:  if oldname[2] = ':' and newname[2] = ':' then
> (see above)
>
>
> ==========================[ documentation() ]===========================
<snip>

>
>
>