Class: EmailAddressValidator::RFC822Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/email_address_validator/rfc822-parser.rb

Defined Under Namespace

Classes: MemoEntry, ParseError, RuleInfo

Constant Summary collapse

Rules = 
{}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(str, debug = false) ⇒ RFC822Parser

This is distinct from setup_parser so that a standalone parser can redefine #initialize and still have access to the proper parser setup code.



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# File 'lib/email_address_validator/rfc822-parser.rb', line 7

def initialize(str, debug=false)
  setup_parser(str, debug)
end

Instance Attribute Details

#failed_rule ⇒ Object (readonly)

Returns the value of attribute failed_rule.



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# File 'lib/email_address_validator/rfc822-parser.rb', line 153

def failed_rule
  @failed_rule
end

#failing_rule_offset ⇒ Object (readonly)

Returns the value of attribute failing_rule_offset.



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# File 'lib/email_address_validator/rfc822-parser.rb', line 26

def failing_rule_offset
  @failing_rule_offset
end

#pos ⇒ Object

Returns the value of attribute pos.



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# File 'lib/email_address_validator/rfc822-parser.rb', line 27

def pos
  @pos
end

#result ⇒ Object

Returns the value of attribute result.



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# File 'lib/email_address_validator/rfc822-parser.rb', line 27

def result
  @result
end

#string ⇒ Object (readonly)

Returns the value of attribute string.



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# File 'lib/email_address_validator/rfc822-parser.rb', line 25

def string
  @string
end

#validate_domain ⇒ Object

:startdoc:



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# File 'lib/email_address_validator/rfc822-parser.rb', line 358

def validate_domain
  @validate_domain
end

Class Method Details

.rule_info(name, rendered) ⇒ Object 



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# File 'lib/email_address_validator/rfc822-parser.rb', line 351

def self.rule_info(name, rendered)
  RuleInfo.new(name, rendered)
end

Instance Method Details

#__hyphen_ ⇒ Object

  • SPACE*



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# File 'lib/email_address_validator/rfc822-parser.rb', line 392

def __hyphen_
  while true
    _tmp = apply(:_SPACE)
    break unless _tmp
  end
  _tmp = true
  set_failed_rule :__hyphen_ unless _tmp
  return _tmp
end

#_addr_spec ⇒ Object

addr_spec = local_part ocms “@” ocms domain



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# File 'lib/email_address_validator/rfc822-parser.rb', line 1092

def _addr_spec

  _save = self.pos
  while true # sequence
    _tmp = apply(:_local_part)
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_ocms)
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = match_string("@")
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_ocms)
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_domain)
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_addr_spec unless _tmp
  return _tmp
end

#_address ⇒ Object

address = (mailbox | group)



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# File 'lib/email_address_validator/rfc822-parser.rb', line 833

def _address

  _save = self.pos
  while true # choice
    _tmp = apply(:_mailbox)
    break if _tmp
    self.pos = _save
    _tmp = apply(:_group)
    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_address unless _tmp
  return _tmp
end

#_angle_addr ⇒ Object

angle_addr = “<” ocms route? ocms addr_spec “>”



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# File 'lib/email_address_validator/rfc822-parser.rb', line 977

def _angle_addr

  _save = self.pos
  while true # sequence
    _tmp = match_string("<")
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_ocms)
    unless _tmp
      self.pos = _save
      break
    end
    _save1 = self.pos
    _tmp = apply(:_route)
    unless _tmp
      _tmp = true
      self.pos = _save1
    end
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_ocms)
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_addr_spec)
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = match_string(">")
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_angle_addr unless _tmp
  return _tmp
end

#_AT ⇒ Object

AT = “@”



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# File 'lib/email_address_validator/rfc822-parser.rb', line 403

def _AT
  _tmp = match_string("@")
  set_failed_rule :_AT unless _tmp
  return _tmp
end

#_atom ⇒ Object

atom = /[^]x00-x20 x7Fx80-xFF()<>@,;:\“.[]+/n



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# File 'lib/email_address_validator/rfc822-parser.rb', line 525

def _atom
  _tmp = scan(/\A(?-mix:[^\]\x00-\x20 \x7F\x80-\xFF()<>@,;:\\".\[]+)/n)
  set_failed_rule :_atom unless _tmp
  return _tmp
end

#_CHAR ⇒ Object

CHAR = /[x00-x7f]/



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# File 'lib/email_address_validator/rfc822-parser.rb', line 428

def _CHAR
  _tmp = scan(/\A(?-mix:[\x00-\x7f])/)
  set_failed_rule :_CHAR unless _tmp
  return _tmp
end

#_comment ⇒ Object

comment = “(” (ctext | quoted_pair | comment)* “)”



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# File 'lib/email_address_validator/rfc822-parser.rb', line 689

def _comment

  _save = self.pos
  while true # sequence
    _tmp = match_string("(")
    unless _tmp
      self.pos = _save
      break
    end
    while true

      _save2 = self.pos
      while true # choice
        _tmp = apply(:_ctext)
        break if _tmp
        self.pos = _save2
        _tmp = apply(:_quoted_pair)
        break if _tmp
        self.pos = _save2
        _tmp = apply(:_comment)
        break if _tmp
        self.pos = _save2
        break
      end # end choice

      break unless _tmp
    end
    _tmp = true
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = match_string(")")
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_comment unless _tmp
  return _tmp
end

#_CR ⇒ Object

CR = /x0D/



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# File 'lib/email_address_validator/rfc822-parser.rb', line 378

def _CR
  _tmp = scan(/\A(?-mix:\x0D)/)
  set_failed_rule :_CR unless _tmp
  return _tmp
end

#_CRLF ⇒ Object

CRLF = CR LF



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# File 'lib/email_address_validator/rfc822-parser.rb', line 449

def _CRLF

  _save = self.pos
  while true # sequence
    _tmp = apply(:_CR)
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_LF)
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_CRLF unless _tmp
  return _tmp
end

#_ctext ⇒ Object

ctext = (/[^)\x0Dx80-xFF(]+/n | linear_white_space)



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# File 'lib/email_address_validator/rfc822-parser.rb', line 532

def _ctext

  _save = self.pos
  while true # choice
    _tmp = scan(/\A(?-mix:[^)\\\x0D\x80-\xFF(]+)/n)
    break if _tmp
    self.pos = _save
    _tmp = apply(:_linear_white_space)
    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_ctext unless _tmp
  return _tmp
end

#_CTL ⇒ Object

CTL = /[x00-x1fx7f]/



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# File 'lib/email_address_validator/rfc822-parser.rb', line 435

def _CTL
  _tmp = scan(/\A(?-mix:[\x00-\x1f\x7f])/)
  set_failed_rule :_CTL unless _tmp
  return _tmp
end

#_domain ⇒ Object

domain = (domain_literal | < sub_domain ocms (“.” ocms sub_domain)* > &{ @validate_domain ? EmailAddressValidator::DomainParser.new(text).parse : true })



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# File 'lib/email_address_validator/rfc822-parser.rb', line 1177

def _domain

  _save = self.pos
  while true # choice
    _tmp = apply(:_domain_literal)
    break if _tmp
    self.pos = _save

    _save1 = self.pos
    while true # sequence
      _text_start = self.pos

      _save2 = self.pos
      while true # sequence
        _tmp = apply(:_sub_domain)
        unless _tmp
          self.pos = _save2
          break
        end
        _tmp = apply(:_ocms)
        unless _tmp
          self.pos = _save2
          break
        end
        while true

          _save4 = self.pos
          while true # sequence
            _tmp = match_string(".")
            unless _tmp
              self.pos = _save4
              break
            end
            _tmp = apply(:_ocms)
            unless _tmp
              self.pos = _save4
              break
            end
            _tmp = apply(:_sub_domain)
            unless _tmp
              self.pos = _save4
            end
            break
          end # end sequence

          break unless _tmp
        end
        _tmp = true
        unless _tmp
          self.pos = _save2
        end
        break
      end # end sequence

      if _tmp
        text = get_text(_text_start)
      end
      unless _tmp
        self.pos = _save1
        break
      end
      _save5 = self.pos
      _tmp = begin;  @validate_domain ? EmailAddressValidator::DomainParser.new(text).parse : true ; end
      self.pos = _save5
      unless _tmp
        self.pos = _save1
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_domain unless _tmp
  return _tmp
end

#_domain_literal ⇒ Object

domain_literal = “[” (dtext | quoted_pair)* “]”



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# File 'lib/email_address_validator/rfc822-parser.rb', line 648

def _domain_literal

  _save = self.pos
  while true # sequence
    _tmp = match_string("[")
    unless _tmp
      self.pos = _save
      break
    end
    while true

      _save2 = self.pos
      while true # choice
        _tmp = apply(:_dtext)
        break if _tmp
        self.pos = _save2
        _tmp = apply(:_quoted_pair)
        break if _tmp
        self.pos = _save2
        break
      end # end choice

      break unless _tmp
    end
    _tmp = true
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = match_string("]")
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_domain_literal unless _tmp
  return _tmp
end

#_domain_ref ⇒ Object

domain_ref = atom



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# File 'lib/email_address_validator/rfc822-parser.rb', line 1275

def _domain_ref
  _tmp = apply(:_atom)
  set_failed_rule :_domain_ref unless _tmp
  return _tmp
end

#_dtext ⇒ Object

dtext = (/[^]\x0Dx80-xFF[]+/n | linear_white_space)



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# File 'lib/email_address_validator/rfc822-parser.rb', line 550

def _dtext

  _save = self.pos
  while true # choice
    _tmp = scan(/\A(?-mix:[^\]\\\x0D\x80-\xFF\[]+)/n)
    break if _tmp
    self.pos = _save
    _tmp = apply(:_linear_white_space)
    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_dtext unless _tmp
  return _tmp
end

#_group ⇒ Object

group = phrase ocms “:” ocms mailbox (ocms “,” ocms mailbox)* ocms “;”



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# File 'lib/email_address_validator/rfc822-parser.rb', line 851

def _group

  _save = self.pos
  while true # sequence
    _tmp = apply(:_phrase)
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_ocms)
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = match_string(":")
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_ocms)
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_mailbox)
    unless _tmp
      self.pos = _save
      break
    end
    while true

      _save2 = self.pos
      while true # sequence
        _tmp = apply(:_ocms)
        unless _tmp
          self.pos = _save2
          break
        end
        _tmp = match_string(",")
        unless _tmp
          self.pos = _save2
          break
        end
        _tmp = apply(:_ocms)
        unless _tmp
          self.pos = _save2
          break
        end
        _tmp = apply(:_mailbox)
        unless _tmp
          self.pos = _save2
        end
        break
      end # end sequence

      break unless _tmp
    end
    _tmp = true
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_ocms)
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = match_string(";")
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_group unless _tmp
  return _tmp
end

#_HTAB ⇒ Object

HTAB = /x09/



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# File 'lib/email_address_validator/rfc822-parser.rb', line 364

def _HTAB
  _tmp = scan(/\A(?-mix:\x09)/)
  set_failed_rule :_HTAB unless _tmp
  return _tmp
end

#_LF ⇒ Object

LF = /x0A/



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# File 'lib/email_address_validator/rfc822-parser.rb', line 371

def _LF
  _tmp = scan(/\A(?-mix:\x0A)/)
  set_failed_rule :_LF unless _tmp
  return _tmp
end

#_linear_white_space ⇒ Object

linear_white_space = (CRLF? LWSP_char)+



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# File 'lib/email_address_validator/rfc822-parser.rb', line 470

def _linear_white_space
  _save = self.pos

  _save1 = self.pos
  while true # sequence
    _save2 = self.pos
    _tmp = apply(:_CRLF)
    unless _tmp
      _tmp = true
      self.pos = _save2
    end
    unless _tmp
      self.pos = _save1
      break
    end
    _tmp = apply(:_LWSP_char)
    unless _tmp
      self.pos = _save1
    end
    break
  end # end sequence

  if _tmp
    while true

      _save3 = self.pos
      while true # sequence
        _save4 = self.pos
        _tmp = apply(:_CRLF)
        unless _tmp
          _tmp = true
          self.pos = _save4
        end
        unless _tmp
          self.pos = _save3
          break
        end
        _tmp = apply(:_LWSP_char)
        unless _tmp
          self.pos = _save3
        end
        break
      end # end sequence

      break unless _tmp
    end
    _tmp = true
  else
    self.pos = _save
  end
  set_failed_rule :_linear_white_space unless _tmp
  return _tmp
end

#_local_part ⇒ Object

local_part = word ocms (“.” ocms word)*



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# File 'lib/email_address_validator/rfc822-parser.rb', line 1128

def _local_part

  _save = self.pos
  while true # sequence
    _tmp = apply(:_word)
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_ocms)
    unless _tmp
      self.pos = _save
      break
    end
    while true

      _save2 = self.pos
      while true # sequence
        _tmp = match_string(".")
        unless _tmp
          self.pos = _save2
          break
        end
        _tmp = apply(:_ocms)
        unless _tmp
          self.pos = _save2
          break
        end
        _tmp = apply(:_word)
        unless _tmp
          self.pos = _save2
        end
        break
      end # end sequence

      break unless _tmp
    end
    _tmp = true
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_local_part unless _tmp
  return _tmp
end

#_LWSP_char ⇒ Object

LWSP_char = (SPACE | HTAB)



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# File 'lib/email_address_validator/rfc822-parser.rb', line 410

def _LWSP_char

  _save = self.pos
  while true # choice
    _tmp = apply(:_SPACE)
    break if _tmp
    self.pos = _save
    _tmp = apply(:_HTAB)
    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_LWSP_char unless _tmp
  return _tmp
end

#_mailbox ⇒ Object

mailbox = (addr_spec | phrase - ocms - angle_addr)



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# File 'lib/email_address_validator/rfc822-parser.rb', line 930

def _mailbox

  _save = self.pos
  while true # choice
    _tmp = apply(:_addr_spec)
    break if _tmp
    self.pos = _save

    _save1 = self.pos
    while true # sequence
      _tmp = apply(:_phrase)
      unless _tmp
        self.pos = _save1
        break
      end
      _tmp = apply(:__hyphen_)
      unless _tmp
        self.pos = _save1
        break
      end
      _tmp = apply(:_ocms)
      unless _tmp
        self.pos = _save1
        break
      end
      _tmp = apply(:__hyphen_)
      unless _tmp
        self.pos = _save1
        break
      end
      _tmp = apply(:_angle_addr)
      unless _tmp
        self.pos = _save1
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_mailbox unless _tmp
  return _tmp
end

#_ocms ⇒ Object

ocms = comment*



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# File 'lib/email_address_validator/rfc822-parser.rb', line 733

def _ocms
  while true
    _tmp = apply(:_comment)
    break unless _tmp
  end
  _tmp = true
  set_failed_rule :_ocms unless _tmp
  return _tmp
end

#_only_addr_spec ⇒ Object

only_addr_spec = addr_spec !.



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# File 'lib/email_address_validator/rfc822-parser.rb', line 1306

def _only_addr_spec

  _save = self.pos
  while true # sequence
    _tmp = apply(:_addr_spec)
    unless _tmp
      self.pos = _save
      break
    end
    _save1 = self.pos
    _tmp = get_byte
    _tmp = _tmp ? nil : true
    self.pos = _save1
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_only_addr_spec unless _tmp
  return _tmp
end

#_phrase ⇒ Object

phrase = (word -)+



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# File 'lib/email_address_validator/rfc822-parser.rb', line 762

def _phrase
  _save = self.pos

  _save1 = self.pos
  while true # sequence
    _tmp = apply(:_word)
    unless _tmp
      self.pos = _save1
      break
    end
    _tmp = apply(:__hyphen_)
    unless _tmp
      self.pos = _save1
    end
    break
  end # end sequence

  if _tmp
    while true

      _save2 = self.pos
      while true # sequence
        _tmp = apply(:_word)
        unless _tmp
          self.pos = _save2
          break
        end
        _tmp = apply(:__hyphen_)
        unless _tmp
          self.pos = _save2
        end
        break
      end # end sequence

      break unless _tmp
    end
    _tmp = true
  else
    self.pos = _save
  end
  set_failed_rule :_phrase unless _tmp
  return _tmp
end

#_qtext ⇒ Object

qtext = (/[^“\x0Dx80-xFF]+/n | linear_white_space)



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# File 'lib/email_address_validator/rfc822-parser.rb', line 568

def _qtext

  _save = self.pos
  while true # choice
    _tmp = scan(/\A(?-mix:[^"\\\x0D\x80-\xFF]+)/n)
    break if _tmp
    self.pos = _save
    _tmp = apply(:_linear_white_space)
    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_qtext unless _tmp
  return _tmp
end

#_quoted_pair ⇒ Object

quoted_pair = “\” CHAR



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# File 'lib/email_address_validator/rfc822-parser.rb', line 586

def _quoted_pair

  _save = self.pos
  while true # sequence
    _tmp = match_string("\\")
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_CHAR)
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_quoted_pair unless _tmp
  return _tmp
end

#_quoted_string ⇒ Object

quoted_string = “"” (qtext | quoted_pair)* “"”



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# File 'lib/email_address_validator/rfc822-parser.rb', line 607

def _quoted_string

  _save = self.pos
  while true # sequence
    _tmp = match_string("\"")
    unless _tmp
      self.pos = _save
      break
    end
    while true

      _save2 = self.pos
      while true # choice
        _tmp = apply(:_qtext)
        break if _tmp
        self.pos = _save2
        _tmp = apply(:_quoted_pair)
        break if _tmp
        self.pos = _save2
        break
      end # end choice

      break unless _tmp
    end
    _tmp = true
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = match_string("\"")
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_quoted_string unless _tmp
  return _tmp
end

#_root ⇒ Object

root = valid !.



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# File 'lib/email_address_validator/rfc822-parser.rb', line 1282

def _root

  _save = self.pos
  while true # sequence
    _tmp = apply(:_valid)
    unless _tmp
      self.pos = _save
      break
    end
    _save1 = self.pos
    _tmp = get_byte
    _tmp = _tmp ? nil : true
    self.pos = _save1
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_root unless _tmp
  return _tmp
end

#_route ⇒ Object

route = (AT ocms domain)+ “:”



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# File 'lib/email_address_validator/rfc822-parser.rb', line 1023

def _route

  _save = self.pos
  while true # sequence
    _save1 = self.pos

    _save2 = self.pos
    while true # sequence
      _tmp = apply(:_AT)
      unless _tmp
        self.pos = _save2
        break
      end
      _tmp = apply(:_ocms)
      unless _tmp
        self.pos = _save2
        break
      end
      _tmp = apply(:_domain)
      unless _tmp
        self.pos = _save2
      end
      break
    end # end sequence

    if _tmp
      while true

        _save3 = self.pos
        while true # sequence
          _tmp = apply(:_AT)
          unless _tmp
            self.pos = _save3
            break
          end
          _tmp = apply(:_ocms)
          unless _tmp
            self.pos = _save3
            break
          end
          _tmp = apply(:_domain)
          unless _tmp
            self.pos = _save3
          end
          break
        end # end sequence

        break unless _tmp
      end
      _tmp = true
    else
      self.pos = _save1
    end
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = match_string(":")
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_route unless _tmp
  return _tmp
end

#_SPACE ⇒ Object

SPACE = “ ”



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# File 'lib/email_address_validator/rfc822-parser.rb', line 385

def _SPACE
  _tmp = match_string(" ")
  set_failed_rule :_SPACE unless _tmp
  return _tmp
end

#_special ⇒ Object

special = /[]()<>@,;:\“.[]/



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# File 'lib/email_address_validator/rfc822-parser.rb', line 442

def _special
  _tmp = scan(/\A(?-mix:[\]()<>@,;:\\".\[])/)
  set_failed_rule :_special unless _tmp
  return _tmp
end

#_sub_domain ⇒ Object

sub_domain = (domain_ref | domain_literal)



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# File 'lib/email_address_validator/rfc822-parser.rb', line 1257

def _sub_domain

  _save = self.pos
  while true # choice
    _tmp = apply(:_domain_ref)
    break if _tmp
    self.pos = _save
    _tmp = apply(:_domain_literal)
    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_sub_domain unless _tmp
  return _tmp
end

#_valid ⇒ Object

valid = ocms address ocms



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# File 'lib/email_address_validator/rfc822-parser.rb', line 807

def _valid

  _save = self.pos
  while true # sequence
    _tmp = apply(:_ocms)
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_address)
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_ocms)
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_valid unless _tmp
  return _tmp
end

#_word ⇒ Object

word = (atom | quoted_string)



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# File 'lib/email_address_validator/rfc822-parser.rb', line 744

def _word

  _save = self.pos
  while true # choice
    _tmp = apply(:_atom)
    break if _tmp
    self.pos = _save
    _tmp = apply(:_quoted_string)
    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_word unless _tmp
  return _tmp
end

#apply(rule) ⇒ Object 



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# File 'lib/email_address_validator/rfc822-parser.rb', line 286

def apply(rule)
  if m = @memoizations[rule][@pos]
    @pos = m.pos
    if !m.set
      m.left_rec = true
      return nil
    end

    @result = m.result

    return m.ans
  else
    m = MemoEntry.new(nil, @pos)
    @memoizations[rule][@pos] = m
    start_pos = @pos

    ans = __send__ rule

    lr = m.left_rec

    m.move! ans, @pos, @result

    # Don't bother trying to grow the left recursion
    # if it's failing straight away (thus there is no seed)
    if ans and lr
      return grow_lr(rule, nil, start_pos, m)
    else
      return ans
    end

    return ans
  end
end

#apply_with_args(rule, *args) ⇒ Object 



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# File 'lib/email_address_validator/rfc822-parser.rb', line 251

def apply_with_args(rule, *args)
  memo_key = [rule, args]
  if m = @memoizations[memo_key][@pos]
    @pos = m.pos
    if !m.set
      m.left_rec = true
      return nil
    end

    @result = m.result

    return m.ans
  else
    m = MemoEntry.new(nil, @pos)
    @memoizations[memo_key][@pos] = m
    start_pos = @pos

    ans = __send__ rule, *args

    lr = m.left_rec

    m.move! ans, @pos, @result

    # Don't bother trying to grow the left recursion
    # if it's failing straight away (thus there is no seed)
    if ans and lr
      return grow_lr(rule, args, start_pos, m)
    else
      return ans
    end

    return ans
  end
end

#current_column(target = pos) ⇒ Object 



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# File 'lib/email_address_validator/rfc822-parser.rb', line 29

def current_column(target=pos)
  if c = string.rindex("\n", target-1)
    return target - c - 1
  end

  target + 1
end

#current_line(target = pos) ⇒ Object 



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# File 'lib/email_address_validator/rfc822-parser.rb', line 37

def current_line(target=pos)
  cur_offset = 0
  cur_line = 0

  string.each_line do |line|
    cur_line += 1
    cur_offset += line.size
    return cur_line if cur_offset >= target
  end

  -1
end

#external_invoke(other, rule, *args) ⇒ Object 



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# File 'lib/email_address_validator/rfc822-parser.rb', line 232

def external_invoke(other, rule, *args)
  old_pos = @pos
  old_string = @string

  set_string other.string, other.pos

  begin
    if val = __send__(rule, *args)
      other.pos = @pos
      other.result = @result
    else
      other.set_failed_rule "#{self.class}##{rule}"
    end
    val
  ensure
    set_string old_string, old_pos
  end
end

#failure_caret ⇒ Object 



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# File 'lib/email_address_validator/rfc822-parser.rb', line 90

def failure_caret
  l = current_line @failing_rule_offset
  c = current_column @failing_rule_offset

  line = lines[l-1]
  "#{line}\n#{' ' * (c - 1)}^"
end

#failure_character ⇒ Object 



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# File 'lib/email_address_validator/rfc822-parser.rb', line 98

def failure_character
  l = current_line @failing_rule_offset
  c = current_column @failing_rule_offset
  lines[l-1][c-1, 1]
end

#failure_info ⇒ Object 



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# File 'lib/email_address_validator/rfc822-parser.rb', line 78

def failure_info
  l = current_line @failing_rule_offset
  c = current_column @failing_rule_offset

  if @failed_rule.kind_of? Symbol
    info = self.class::Rules[@failed_rule]
    "line #{l}, column #{c}: failed rule '#{info.name}' = '#{info.rendered}'"
  else
    "line #{l}, column #{c}: failed rule '#{@failed_rule}'"
  end
end

#failure_oneline ⇒ Object 



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# File 'lib/email_address_validator/rfc822-parser.rb', line 104

def failure_oneline
  l = current_line @failing_rule_offset
  c = current_column @failing_rule_offset

  char = lines[l-1][c-1, 1]

  if @failed_rule.kind_of? Symbol
    info = self.class::Rules[@failed_rule]
    "@#{l}:#{c} failed rule '#{info.name}', got '#{char}'"
  else
    "@#{l}:#{c} failed rule '#{@failed_rule}', got '#{char}'"
  end
end

#get_byte ⇒ Object 



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# File 'lib/email_address_validator/rfc822-parser.rb', line 176

def get_byte
  if @pos >= @string_size
    return nil
  end

  s = @string[@pos].ord
  @pos += 1
  s
end

#get_text(start) ⇒ Object 



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# File 'lib/email_address_validator/rfc822-parser.rb', line 58

def get_text(start)
  @string[start..@pos-1]
end

#grow_lr(rule, args, start_pos, m) ⇒ Object 



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# File 'lib/email_address_validator/rfc822-parser.rb', line 320

def grow_lr(rule, args, start_pos, m)
  while true
    @pos = start_pos
    @result = m.result

    if args
      ans = __send__ rule, *args
    else
      ans = __send__ rule
    end
    return nil unless ans

    break if @pos <= m.pos

    m.move! ans, @pos, @result
  end

  @result = m.result
  @pos = m.pos
  return m.ans
end

#lines ⇒ Object 



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# File 'lib/email_address_validator/rfc822-parser.rb', line 50

def lines
  lines = []
  string.each_line { |l| lines << l }
  lines
end

#match_string(str) ⇒ Object 



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# File 'lib/email_address_validator/rfc822-parser.rb', line 155

def match_string(str)
  len = str.size
  if @string[pos,len] == str
    @pos += len
    return str
  end

  return nil
end

#parse(rule = nil) ⇒ Object 



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# File 'lib/email_address_validator/rfc822-parser.rb', line 197

def parse(rule=nil)
  # We invoke the rules indirectly via apply
  # instead of by just calling them as methods because
  # if the rules use left recursion, apply needs to
  # manage that.

  if !rule
    apply(:_root)
  else
    method = rule.gsub("-","_hyphen_")
    apply :"_#{method}"
  end
end

#raise_error ⇒ Object

Raises:



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# File 'lib/email_address_validator/rfc822-parser.rb', line 121

def raise_error
  raise ParseError, failure_oneline
end

#scan(reg) ⇒ Object 



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# File 'lib/email_address_validator/rfc822-parser.rb', line 165

def scan(reg)
  if m = reg.match(@string[@pos..-1])
    width = m.end(0)
    @pos += width
    return true
  end

  return nil
end

#set_failed_rule(name) ⇒ Object 



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# File 'lib/email_address_validator/rfc822-parser.rb', line 146

def set_failed_rule(name)
  if @pos > @failing_rule_offset
    @failed_rule = name
    @failing_rule_offset = @pos
  end
end

#set_string(string, pos) ⇒ Object

Sets the string and current parsing position for the parser.



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# File 'lib/email_address_validator/rfc822-parser.rb', line 63

def set_string string, pos
  @string = string
  @string_size = string ? string.size : 0
  @pos = pos
end

#setup_foreign_grammar ⇒ Object

:stopdoc:



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# File 'lib/email_address_validator/rfc822-parser.rb', line 361

def setup_foreign_grammar; end

#setup_parser(str, debug = false) ⇒ Object

Prepares for parsing str. If you define a custom initialize you must call this method before #parse



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# File 'lib/email_address_validator/rfc822-parser.rb', line 15

def setup_parser(str, debug=false)
  set_string str, 0
  @memoizations = Hash.new { |h,k| h[k] = {} }
  @result = nil
  @failed_rule = nil
  @failing_rule_offset = -1

  setup_foreign_grammar
end

#show_error(io = STDOUT) ⇒ Object 



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# File 'lib/email_address_validator/rfc822-parser.rb', line 125

def show_error(io=STDOUT)
  error_pos = @failing_rule_offset
  line_no = current_line(error_pos)
  col_no = current_column(error_pos)

  io.puts "On line #{line_no}, column #{col_no}:"

  if @failed_rule.kind_of? Symbol
    info = self.class::Rules[@failed_rule]
    io.puts "Failed to match '#{info.rendered}' (rule '#{info.name}')"
  else
    io.puts "Failed to match rule '#{@failed_rule}'"
  end

  io.puts "Got: #{string[error_pos,1].inspect}"
  line = lines[line_no-1]
  io.puts "=> #{line}"
  io.print(" " * (col_no + 3))
  io.puts "^"
end

#show_pos ⇒ Object 



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# File 'lib/email_address_validator/rfc822-parser.rb', line 69

def show_pos
  width = 10
  if @pos < width
    "#{@pos} (\"#{@string[0,@pos]}\" @ \"#{@string[@pos,width]}\")"
  else
    "#{@pos} (\"... #{@string[@pos - width, width]}\" @ \"#{@string[@pos,width]}\")"
  end
end