# Copyright (c) 2009-2015, Dmitry Vasiliev <dima@hlabs.org>
# All rights reserved.
#
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# modification, are permitted provided that the following conditions are met:
#
#  * Redistributions of source code must retain the above copyright notice,
#    this list of conditions and the following disclaimer.
#  * Redistributions in binary form must reproduce the above copyright notice,
#    this list of conditions and the following disclaimer in the documentation
#    and/or other materials provided with the distribution.
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#    contributors may be used to endorse or promote products derived from this
#    software without specific prior written permission.
#
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require "erlport/erlterms"

include ErlPort::ErlTerm

module ErlPort
module StdIO

    module_function
    def redirect port
        $stdin = RedirectedStdin.new
        $stdout = RedirectedStdout.new port
    end

    private

    class RedirectedStdin
        def method_missing name, *args
            raise IOError, "STDIN is closed for ErlPort connected process"
        end
    end

    class RedirectedStdout
        def initialize port
            @port = port
        end

        def write string
            @port.write(Tuple.new([:P, string]))
        end

        def method_missing name, *args
            raise IOError, "unsupported STDOUT operation for ErlPort"
                " connected process"
        end
    end
end
end
