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Subject: Re: Getting Started With Development

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Re: Ruby on Windows - Ouput char Fixnum on console

From: Heesob Park <phasis@...>
Date: 2013-06-25 00:43:33 UTC
List: ruby-talk #408468
Hi,

2013/6/25 jf Baillon <lists@ruby-forum.com>:
> It's my first post here, and I have some
> difficulties with english an with Ruby.
>
> Please can you give me some help.
>
> Ruby on Windows - Ouput char Fixnum on console. See attached file.
>
> After 'gem install win32-api --platform=3Druby' in a command line
> The following program [between the lines =3D=3D=3D=3D=3D=3D=3D=3D]
>
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> $stdout.sync=3Dtrue
> require 'win32/api'
> include Win32
>
>
> def put_cc car # Ouput char Fixnum on console
>     a ||=3D API.new( '_putch', [], 'I', 'msvcrt')
>     a.call(car)
> end
>
> print "test 200 \n"
>
> print 'ruby ', RUBY_VERSION, 'p', RUBY_PATCHLEVEL, "
> (#{RUBY_RELEASE_DATE}) [#{RUBY_PLATFORM}] "
>
> b =3D [72, 101, 108, 108, 111, 32, 82, 117, 98, 121, 10]
> print "\n"
> b.each { |i| put_cc i  }
>
> put_cc 72
> put_cc 101
> put_cc 108.to_int
> put_cc 108
> put_cc 111
> put_cc 32
> put_cc 82
> put_cc 117
> put_cc 98
> put_cc 121
> put_cc 10
>
> 'hola'.each_byte { |i| put_cc i }
>
> print "\n[Return] -> The end \n"
>
> gets
>
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> gives with Ruby 193 [between the ------------]
> -----------------------------
> test 200
> ruby 1.9.3p429 (2013-05-15) [i386-mingw32]
> Hello Ruby
> Hello Ruby
> hola
> [Return] -> The end
> -----------------------------
> and with Ruby 2.0.0
> -----------------------------
> test 200
> ruby 2.0.0p195 (2013-05-14) [x64-mingw32]
> =C3=B0=C3=B0=C3=B0=C3=B0=C3=B0=C3=B0=C3=B0=C3=B0=C3=B0=C3=B0=C3=B0=C3=A0=
=C3=A0=C3=A0=C3=A0=C3=A0=C3=A0=C3=A0=C3=A0=C3=A0=C3=A0=C3=A0=C3=B0=C3=B0=C3=
=B0=C3=B0
> [Return] -> The end
> -----------------------------
>
> Attachments:
> http://www.ruby-forum.com/attachment/8534/Ouput_char_Fixnum_on_console.rt=
f
>
The win32-api gem is not compatible with Ruby 2.0.0.
If you want to use win32-api with Ruby 2.0.0, please make an issue on
https://github.com/djberg96/win32-api/issues

I recommend ffi instead of win32-api.
You can do the same thing with ffi like this:
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
require 'ffi'

module MyLib
  extend FFI::Library
  ffi_lib FFI::Platform::LIBC
  attach_function :_putch, [ :int ], :int
end

def put_cc car
    MyLib._putch(car)
end

'hola'.each_byte { |i| put_cc i }
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

Regards,
Park Heesob

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