Dear Ruby Gurus,
I would like to load a *.lib file into my *.rb file. How to do that. I
did mentioned the path but was not successful. I did this:
load (or require) “PATH name:*.lib”
thx,
Mankan
Beginner wrote:
Dear Ruby Gurus,
I would like to load a *.lib file into my *.rb file. How to do that. I
did mentioned the path but was not successful. I did this:load (or require) “PATH name:*.lib”
What is in the .lib file?
If it is ruby code (in which case you should just
change it to .rb anyway:),
require “#{path}/foobar.lib”
Should work fine.
If it is object code, I believe ruby can only load
.so (and, I assume, .dll) files so you may need to
extract the shared library.
If it is just plain text or something, you would
want to use File.open(filename) {|f| do_something_with f }.
Please clarify a bit and I am sure we can help you
get it working right!
thx,
Mankan
E
Dear Eero,
Thank you very much. it is a low-level APIs named power32.lib and I
would like to call this APIs from ruby to find the hardware parameters
like number of boards etc.
Hence I am looking for loading this power32.lib file and then call the
low-level API from Ruby.
Pls do let me know if the question is still not clear.
thx in advance,
Mankan
Beginner wrote:
Mankan
The “require” statement loads Ruby extensions, either those written in
pure Ruby or those written in C using the Ruby extension API. So you
can’t use it to interface to an arbitrary .dll or .lib file.
There is a Ruby library that allows you to call functions in .dll files,
though. Check out the Win32API class:
http://www.rubycentral.com/book/lib_windows.html
You might also learn more about the Win32API library by searching
through old postings to this list. Search for “Win32API”.
Welcome to Ruby!
Dear Eero,
I am not able to load even .dll, this is what I did:
require “C:\WINDOWS\SYSTEM32\abc.dll”
I am doing anything wrong. The .dll does exist in the directory, I get
the erro, “the specified procedure could not be found”.(loadError)
thx,
Mankan
Thank you Timothy and Patrick, I got the answer to what I am looking
for.
-Mankna
On 12/20/05, Beginner [email protected] wrote:
I am not able to load even .dll, this is what I did:
require “C:\WINDOWS\SYSTEM32\abc.dll”
Is abc.dll the dll associated with power32.lib? Or just an example. I
am unfamiliar (as is at least a cursory Google 
with this
particular library. Without a specific API document, I doubt we can
provide you with the level of detail you will need at this stage in
your programming career.
From a high level there are two ways normally used to access external
libraries from within Ruby:
-
Create an extension – this requires a certain amount of C
programming either by hand or using something like SWIG. -
Or using DL (http://ttsky.net/ruby/ruby-dl.html)
If you can provide a specific API for the library you may get some
additional help (even more so if the library in question is free/open
source).
Good Luck