How to declare argc, argv in ruby ffi, and how to pass proper values to it?

Answered: What is proper ruby ffi code for this 开发者_Python百科function:

void glutInit(int *argc, char ** argv);

attach_function :glutInit, [:pointer, :pointer], :void

Answered: How to handle array of C-strings? Like a pointer!

Still unanswered:How to change ARGV to match argument type?

If you know how to get "untouched" C argc and argv in Ruby script it would also helped (eg. python have special library for that, I'm not aware of anything similar for Ruby apart from ARGV).

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here someone has written about this: http://zegoggl.es/2009/05/ruby-ffi-recipes.html

you can use :varargs in your attach_function call, and when you call gluInit, you pass an array of type/value pairs.