# begin: ragel

begin

%%{

machine bel;

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

action add_name {
  trace('SET add_name')
  key = @buffers.delete(:ident)
  @buffers[:set_name] = name(key)
}

action add_ident_value {
  trace('SET add_ident_value')
  ident = @buffers.delete(:ident)
  @buffers[:set_value] = value(ident)
}

action add_string_value {
  trace('SET add_string_value')
  string = @buffers.delete(:string)
  @buffers[:set_value] = value(string)
}

action add_list_value {
  trace('SET add_list_value')
  list = @buffers.delete(:list)
  @buffers[:set_value] = value(list)
}

action set_end {
  trace('SET set_end')
  set_node = set()
  completed = true

  name = @buffers.delete(:set_name)
  if name.nil?
    completed = false
  else
    set_node <<= name
  end

  value = @buffers.delete(:set_value)
  if value.nil?
    completed = false
  else
    set_node <<= value
  end
  set_node.complete = completed
  @buffers[:set] = set_node
}

action yield_set {
  trace('SET yield_set')
  yield @buffers[:set]
}

action set_node_eof {
  trace('SET set_node_eof')
  name = @buffers.delete(:set_name)
  set_node = set(name)
  completed = name.complete
  if @buffers.key?(:string)
    value = @buffers.delete(:string)
    set_node <<= value
    completed = completed && value.complete
  elsif @buffers.key?(:ident)
    value = @buffers.delete(:ident)
    set_node <<= value
    completed = completed && value.complete
  elsif @buffers.key?(:list)
    value = @buffers.delete(:list)
    set_node <<= value
    completed = completed && value.complete
  end
  set_node.complete = completed
  yield set_node
}

key =
  an_ident
  %add_name
  ;

ident_value =
  an_ident
  %add_ident_value
  ;

string_value =
  a_string
  %add_string_value
  ;

list_value =
  a_list
  %add_list_value
  ;

value =
  ident_value |
  string_value |
  list_value
  ;

set_node :=
  KW_SET
  SP+
  an_ident
  %add_name
  @eof(set_node_eof)
  SP+
  EQL?
  SP+?
  value?
  @eof(set_node_eof)
  %set_end
  %yield_set
  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 Set

      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 = {}
          @accum_set  = false
          @have_set   = false
          @have_name  = false
          @have_value = false
          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::Set.parse(line) { |obj|
    puts obj.inspect
  }
end

end

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