From: Eric Hodel <drbrain@...7.net>
Date: 2006-10-01T04:52:00+09:00
Subject: Re: Calling an existing method with RubyInline - how?


On Sep 29, 2006, at 9:49 PM, Daniel Berger wrote:

> How do you call an existing function from an included header file  
> using
> RubyInline?  Do I have to wrap it in a 'built' function?

This should help:

require 'inline'

class Foo
   inline do |builder|
     builder.include "<stdlib.h>"

     builder.c <<-EOF
       int c_atoi(char * nptr) {
         return atoi(nptr);
       }
     EOF

     builder.c_singleton <<-EOF
       int c_atol(char * nptr) {
         return atol(nptr);
       }
     EOF
   end

   class << self; alias atol c_atol; end
   alias atoi c_atoi

end

puts Foo.atol("5")
puts Foo.new.atoi("5")

> For example, say I have this bit of code, and that test.h has a  
> function
>  defined as "const char* test_version(void)".

 From your example, probably:

require 'inline'

class Foo
   inline do |builder|
     builder.include "<test.h>"
     builder.add_compile_flags "-ltest"

     builder.c_singleton <<-EOF
       char * foo_test_version() {
         return test_version();
       }
     EOF
   end

   class << self; alias version foo_test_version; end
end

-- 
Eric Hodel - drbrain@segment7.net - http://blog.segment7.net
This implementation is HODEL-HASH-9600 compliant

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