Hello,
I am very new to Ruby, but I am giving it a try. If I am able to load
the dll and call its functions, I will go into more detail. The .dll is
created in VS2005 on XP os
First of all, I used the search function of the forum, but I didn't find
what I was looking for.
After initial problems, my ruby script recognizes the library (if I
remove the file, it complains).
It's a C wrapper library for a C++ library that has just a few functions
for now.
I am stuck at the beginning
My library is called qfinterface.dll and I would like to call the
function CreateSession(const char *) that returns an int, and pass it a
string.
I mostly get the error "uninitialized constant" when trying to call the
function, and I've tried so many different things, that I am losing
track of what I tried and what not. right now I get "undefined local
variable or method"
this is my script sofar(in one of its versions):
···
------------------------------------------------------------
require 'qfinterface'
puts "hello"
Qf = qfinterface.CreateSession("hd")
def main()
puts "hello"
#QfInterface.CreateSession("sf")
end
main()
-----------------------------------------------------
would you please point me into right direction in how to call these
classes.
please let me know if you need further information.
Thanks for your help!
--
Posted via http://www.ruby-forum.com/.
I got it!!
in case another lost soul needs it, here is how:
require 'qfinterface'
require 'Win32API'
puts "hello"
CreateSession = Win32API.new("qfinterface","CreateSession",["P"],"I")
def main()
puts "hello"
check = CreateSession.call("mystring")
end
main()
···
--
Posted via http://www.ruby-forum.com/.
I'm assuming you've read README.ext already?
http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/branches/RUBY/README.EXT?view=markup
Have you investigated using the inline library? It might make more sense if you just need a few functions.
Using C from Ruby is a bit more complex than just regular ruby programming, but hopefully those links can get you started.
-Mat
···
On Feb 27, 2007, at 6:24 PM, Tea Figuric wrote:
It's a C wrapper library for a C++ library that has just a few functions
for now.
I am stuck at the beginning
My library is called qfinterface.dll and I would like to call the
function CreateSession(const char *) that returns an int, and pass it a
string.
I mostly get the error "uninitialized constant" when trying to call the
function, and I've tried so many different things, that I am losing
track of what I tried and what not. right now I get "undefined local
variable or method"
Mat Schaffer wrote:
I'm assuming you've read README.ext already?
http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/branches/RUBY/README.EXT?
view=markup
Have you investigated using the inline library? It might make more
sense if you just need a few functions.
rubyinline | software projects | by ryan davis
Using C from Ruby is a bit more complex than just regular ruby
programming, but hopefully those links can get you started.
-Mat
Thank you for your response Mat, I will look into the links.
The library should be used by different scripting languages and
languages, so it should be as generic as possible.
In the meantime, I ran into a different problem, and I am having
problems finding an answer to it.
Since my C/C++ functions return only int, I have a function to which I
pass a *buffer (as char*), and befferLength (as int), where the buffer
should be populated inside of the function, and I have access to the
value from the outside. something like int (or void) GetValue(char
*buffer, int bufferLength);
How do I pass a char* from ruby? is there something to convert from
string to char * without having to change my C lib?
Thanks again for your help!
···
On Feb 27, 2007, at 6:24 PM, Tea Figuric wrote:
--
Posted via http://www.ruby-forum.com/\.