# begin: ragel

begin

%%{

machine bel;

include 'common.rl';
include 'identifier.rl';
include 'string.rl';

action add_name {
  trace('DEFINE_NAMESPACE add_name')
  name = @buffers.delete(:ident)
  @buffers[:namespace_definition_name] = name
}

action add_string_value {
  trace('DEFINE_NAMESPACE add_string_value')
  string_node = @buffers.delete(:string)
  domain   = @buffers.delete(:namespace_definition_domain)
  domain <<= string_node
  leaf = domain(domain)
  leaf.complete = string_node.complete
  @buffers[:namespace_definition_domain] = leaf
}

action add_uri_domain {
  trace('DEFINE_NAMESPACE add_uri_domain')
  @buffers[:namespace_definition_domain] = uri()
}

action add_url_domain {
  trace('DEFINE_NAMESPACE add_url_domain')
  @buffers[:namespace_definition_domain] = url()
}

action define_namespace_end {
  trace('DEFINE_NAMESPACE define_namespace_end')
  namespace_definition_node = namespace_definition()

  name = @buffers.delete(:namespace_definition_name)
  namespace_definition_node <<= keyword(name)

  domain = @buffers.delete(:namespace_definition_domain)
  unless domain.nil?
    namespace_definition_node <<= domain
    namespace_definition_node.complete = domain.complete
  end
  @buffers[:namespace_definition] = namespace_definition_node
}

action yield_define_namespace {
  trace('DEFINE_NAMESPACE yield_define_namespace')
  yield @buffers[:namespace_definition]
}

action define_namespace_node_eof {
  trace('DEFINE_NAMESPACE define_namespace_node_eof')
  leaf = url()
  string_node = @buffers.delete(:string)
  unless string_node.nil?
    leaf <<= string_node
    leaf.complete = string_node.complete
  end
  domain_node = domain(leaf)
  domain_node.complete = leaf.complete
  namespace_definition_node = namespace_definition(domain_node)
  namespace_definition_node.complete = domain_node.complete
  yield namespace_definition_node
}

string_value =
  a_string
  %add_string_value
  ;

uri_domain =
  KW_URI
  %add_uri_domain
  ;

url_domain =
  KW_URL
  %add_url_domain
  ;

define_namespace_node :=
  DEFINE_NAMESPACE
  SP+
  an_ident
  %add_name
  SP+
  KW_AS
  SP+
  (url_domain | uri_domain)
  SP+
  string_value
  @eof(define_namespace_node_eof)
  %define_namespace_end
  %yield_define_namespace
  NL
  ;

}%%

end

# end: ragel

require_relative '../ast/node' require_relative '../mixin/buffer' require_relative '../nonblocking_io_wrapper' require_relative '../tracer'

module BELParser

module Parsers
  module BELScript
    module DefineNamespace

      class << self

        MAX_LENGTH = 1024 * 128 # 128K

        def parse(content)
          return nil unless content

          Parser.new(content).each do |obj|
            yield obj
          end
        end
      end

      private

      class Parser
        include Enumerable
        include BELParser::Parsers::Buffer
        include BELParser::Parsers::AST::Sexp
        include BELParser::Parsers::Tracer

        def initialize(content)
          @content = content
    # begin: ragel
          %% write data;
    # end: ragel
        end

        def each
          @buffers =    {}
          @incomplete = {}
          stack       = []
          data        = @content.unpack('C*')
          p           = 0
          pe          = data.length
          eof         = data.length

    # begin: ragel
          %% write init;
          %% write exec;
    # end: ragel
        end
      end
    end
  end
end

end

if __FILE__ == $0

$stdin.each_line do |line|
  BELParser::Parsers::BELScript::DefineNamespace.parse(line) { |obj|
    puts obj.inspect
  }
end

end

# vim: ft=ruby ts=2 sw=2: # encoding: utf-8