On 21/08/2008, Lyes A. [email protected] wrote:
have two problems:
1- The class of the function output in Ruby is SWIG::TYPE_p_FILE, what is
this class? I looked for it in the net by without results, Hows can I
recover the data from my temporary file with this?
What you get is a FILE * object which ruby cannot handle. However, you
can use Swig to write read and write methods for this object, and you
could then get at the data.
Or you could rewrite your C function to return a file descriptor
rather than a FILE * object, and update the Swig wrapper to turn the
file descriptor into an IO object (using IO::for_fd) that you can use
in Ruby without problems. Or you could just use the automatic Swig
wrapper, and wrap the function once more in ruby to turn the fd into
2- when I call this function from a C program, the variable code will
contain a string value that the function copy to it from an other variable
in internal. and with a C program, the content of the variable code is
updated very well. But when I call the wrapped function from a Ruby script,
the argument code stays empty (empty string “”)? How have to give this
argument in such way that it will be modified?
I haven’t seen your Swig code (and I am not proficient with Swig
anyway but others might figure out something when they look at it) but
my guess is that autogenerated wrappers should convert String to char
What might confuse the generator is the first argument which has no
apparent type, and you have to extract some C value from the argument
passed to the wrapped function. Which means that you will probably
have to write a manual wrapper or even multiple wrappers that convert
the first argument in different ways, and perhaps pass a different
second argument based on the conversion of the first argument.
Generally I have no idea what the function is supposed to do so I
cannot tell you how it could be wrapped.