OpenEuphoria

1. win32Lib request for RemoveDirectoryA

• Posted by Bob Thompson <rthompson at rthompson.karoo.co.uk> Jul 02, 2006
• 687 views

Derek,

I'm looking for a deltree/y or RMDIR/S/y equivalent.

Can you add a wrapper for RemoveDirectoryA to win32lib along with an
example please.

I added the following to my copy of win32Kernel.ew and win32file.ew.

global constant
xRemoveDirectory = registerw32Function
kernel32, "RemoveDirectoryA",{C_POINTER},C_LONG)

global function removeDirectory(sequence name)
    atom a
    atom r

    a = w32acquire_mem(0, name)

    r = w32Func(xRemoveDirectory,{a})

    w32release_mem(a)

    return r
end function

I recognise that the directory has to be empty but it fails to delete
a directory outside my BIN folder. How do I give my programme delete access?

Do I have to write the following to get it to work?

?moveFile("C:\\new_folder_xyz", "C:\\euphoria\\bin\\new_folder_xyz")

?removeDirectory("new_folder_xyz")

Regards,

Bob

3. Re: win32Lib request for RemoveDirectoryA

• Posted by don cole <doncole at pacbell.net> Jul 02, 2006
• 617 views

Bob Thompson wrote:
> 
> 
> Derek,
> 
> I'm looking for a deltree/y or RMDIR/S/y equivalent.
> 
> Can you add a wrapper for RemoveDirectoryA to win32lib along with an
> example please.
> 
> I added the following to my copy of win32Kernel.ew and win32file.ew.
> 
> global constant
> xRemoveDirectory = registerw32Function
> kernel32, "RemoveDirectoryA",{C_POINTER},C_LONG)
> 
> global function removeDirectory(sequence name)
>     atom a
>     atom r
> 
>     a = w32acquire_mem(0, name)
> 
>     r = w32Func(xRemoveDirectory,{a})
> 
>     w32release_mem(a)
> 
>     return r
> end function
> 
> I recognise that the directory has to be empty but it fails to delete
> a directory outside my BIN folder. How do I give my programme delete access?
> 
> Do I have to write the following to get it to work?
> 
> ?moveFile("C:\\new_folder_xyz", "C:\\euphoria\\bin\\new_folder_xyz")
> 
> ?removeDirectory("new_folder_xyz")
> 
> Regards,
> 
> Bob

This might be stupid but did you try: removeDirectory("C:\\new_folder_xyz")

Don Cole

5. Re: win32Lib request for RemoveDirectoryA

• Posted by Derek Parnell <ddparnell at bigpond.com> Jul 03, 2006
• 631 views

> Derek,
> 
> If you don't think the wrapper sits well in win32Lib, no problem - Akusaya's
> Standard Library code looks good.

It is worth inclusion. But it won't be done this week as I've got some deadlines
looming 

-- 
Derek Parnell
Melbourne, Australia
Skype name: derek.j.parnell

7. Re: win32Lib request for RemoveDirectoryA

• Posted by Bob Thompson <rthompson at rthompson.karoo.co.uk> Jul 03, 2006
• 633 views
• Last edited Jul 04, 2006

don cole wrote:

> BTW with capactors (unlike any other electronic components I know of) it's
> best to replace with NEW ones.

You're right, Don, but I needed a quick repair. I designed and built a
couple of Hi-Fi amps for myself several years ago. The best is a triode
input with a transformer coupling (2x step up) to a power MOSFET feeding
through a 2x step down output transformer (to make better followers
and lower the current demand from the caps). Pure class A, no feedback!
> 
> Your code looks fine to me. How did you know to make changes in win32Kernel.ew
> and win32file.ew?
>  
> Don Cole

I used reverse engineering. I don’t particularly have enough spare time
to learn the basics from scratch. C code is pretty ugly to me and there
are very good win32 libraries out there. My interest is in Euphoria
programming, and a Windows interface is just an added, and visually
attractive, bonus at this moment made easily available by the generosity
of the community of (usually) professional programmers.

I guessed everyone was essentially using the same code to use a routine
from the three common Windows DLLs, e.g. from Akusaya's code;

xDeleteFile   = define_c_func(open_dll("kernel32"), "DeleteFileA",
{C_POINTER}, C_LONG)

global function delete_file(sequence filename)
atom pfilename, ret
pfilename = allocate_string(filename)
ret = c_func(xDeleteFile, {pfilename})
free(pfilename)
return ret
end function

It’s just that everyone’s style is different, as it should be, e.g. from
w32Kernel.ew and from w32file.ew

xDeleteFile  = registerw32Function(kernel32, "DeleteFileA",{C_POINTER},
C_LONG)

global function deleteFile(sequence name)
    atom a
    atom r
    a = w32acquire_mem(0, name)
    r = w32Func(xDeleteFile,{a})
    w32release_mem(a)
    return r
end function

Some may use machine_func(50, file_name) as in memshare .ew instead
of open_dll(file_name) as defined in dll.e. Similar arguments apply to
allocate_string(file_name) versus w32acquire_mem(0, name) preferred by
Derek with its 2 arguments, versus something like

lpszHandle = machine_func(16, length(strHandle)+1)
poke(lpszHandle,strHandle)
poke(lpszHandle+length(strHandle),0) from memshare.ew

I’m not suggesting that these are exact code equivalents, most are
actually functions, but my point is that they all ultimately boil down
to the same code, but they are defined and written differently. I found
this very confusing to start with but it's pretty obvious really.

As if that wasn’t confusing enough, I found myself having to decipher
Bernard’s W32ENGIN.EW to get access to his comprehensive listing of basic
window types, type definitions etc. His program automatically generates
the same code. You can get a quick tour by following Def (exact match) etc.
using a good editor.

I used to start with Win32 programmer’s reference for an overview and
delve into Bernard’s code if need be. There is probably something already
written in the forum or archives though, as was the case with Akusaya's
code and it’s then often a simple task of substituting the format style,
e.g. from Bernard’s and Akusaya's code it is evident that the code for
deleteFile is similar to removeDirectory.

I know it gets a lot more complicated (and interesting) than this the
more you dig. Perhaps it might be possible to write a program to reverse
engineer Bernard’s code and present it in dll.e format like Akusaya's
code :)

Perhaps its a little unorthodox, but I dislike reading manuals. If you
know of an easier way, please advise.

Regards,

Bob

9. Re: win32Lib request for RemoveDirectoryA

• Posted by Bernie Ryan <xotron at bluefrog.com> Jul 03, 2006
• 630 views
• Last edited Jul 04, 2006

Bob Thompson wrote:
> 
> xDeleteFile   = define_c_func(open_dll("kernel32"), "DeleteFileA",
> {C_POINTER}, C_LONG)
> 
> global function delete_file(sequence filename)
> atom pfilename, ret
> pfilename = allocate_string(filename)
> ret = c_func(xDeleteFile, {pfilename})
> free(pfilename)
> return ret
> end function

> I know it gets a lot more complicated (and interesting) than this the
> more you dig. Perhaps it might be possible to write a program to reverse
> engineer Bernard’s code and present it in dll.e format like Akusaya's

Bob:

   Or you can use WMOTOR.

include motor.eu

library("kernel32")
declare("DeleteFile",1,s)

global function delete_file(sequence filename)
atom ret
ret = c_func("DeleteFile", {sz(pfilename)})
szfree()
return ret
end function

Bernie

My files in archive:
WMOTOR, XMOTOR, W32ENGIN, MIXEDLIB, EU_ENGIN, WIN32ERU, WIN32API 

Can be downloaded here:
http://www.rapideuphoria.com/cgi-bin/asearch.exu?dos=on&win=on&lnx=on&gen=on&keywords=bernie+ryan

11. Re: win32Lib request for RemoveDirectoryA

• Posted by Bob Thompson <rthompson at rthompson.karoo.co.uk> Jul 03, 2006
• 647 views
• Last edited Jul 04, 2006

Thanks, Bernie. I'll take a good look at it.

Regards,

Bob

13. Re: win32Lib request for RemoveDirectoryA

• Posted by Bob Thompson <rthompson at rthompson.karoo.co.uk> Jul 04, 2006
• 651 views

don cole wrote:
 
> What's the name of Akusaya's code and Derek's code and Bernard's code that you
> speak of ?
> 
> They are not listed by author in the archives.
> 
> Don Cole

Hi, Don,

Look at Platform.htm for the WIN32.HLP file and other references.

Akusaya's code can be found by searching the forum using his name
and xRemoveDirectory.

Derek's code is in win32Lib.ew. Use GURU.BAT entering deleteFile
and, afterwards, DeleteFileA.

Bernie's code can be found in the archives under Win32Engine.

Memshare can be found in the archives.

Regards,

Bob