From: Daniel Berger <djberg96@...>
Date: 2006-10-01T22:00:12+09:00
Subject: Re: Calling an existing method with RubyInline - how?

Eric Hodel wrote:
> 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

Hm, so I have to wrap each function with a custom generated function.
Is there any chance of adding support for direct calls?  Something
like:

inline{ "return test_version();" }

Or is that just not possible?

Thanks,

Dan