Class: Regextest::Front::Letter::TLetter

Inherits:
Object
  • Object
show all
Includes:
Common, CharClass, Range
Defined in:
lib/regextest/front/letter.rb

Constant Summary collapse

@@id =

a class variable for generating unique name of element

0
@@unicode_ranges = 
{}

Constants included from Common

Common::TstConstDebug, Common::TstConstRecursionMax, Common::TstConstRepeatMax, Common::TstConstRetryMax, Common::TstConstRetryMaxSecond, Common::TstConstTimeout, Common::TstConstUnicodeCharSet, Common::TstFixnumMax

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Common

#TstLog, #TstMdPrint, #TstRand, #TstShuffle, #is_random?, #reset_random_called

Constructor Details

#initialize(type, val) ⇒ TLetter

Constructor



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# File 'lib/regextest/front/letter.rb', line 20

def initialize(type, val)
  TstLog("TLetter: type:#{type}, value:#{val}")
  @options = nil
  @data_type = type
  @value = val[0] || ""
  @offset = val[1] || -1
  @length = val[2] || 0
  @obj = nil
end

Instance Attribute Details

#length ⇒ Object (readonly)

Returns the value of attribute length.



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# File 'lib/regextest/front/letter.rb', line 30

def length
  @length
end

#offset ⇒ Object (readonly)

Returns the value of attribute offset.



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# File 'lib/regextest/front/letter.rb', line 30

def offset
  @offset
end

#value ⇒ Object (readonly)

Returns the value of attribute value.



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# File 'lib/regextest/front/letter.rb', line 30

def value
  @value
end

Instance Method Details

#enumerate ⇒ Object

enumerate codepoints



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# File 'lib/regextest/front/letter.rb', line 315

def enumerate
  @obj.enumerate
end

#generate_any_char(val) ⇒ Object

generate whole set of letters (depends on option)



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# File 'lib/regextest/front/letter.rb', line 94

def generate_any_char(val)
  if @options[:reg_options].is_unicode?
    obj = CharClass.new(TstConstUnicodeCharSet)
  else
    obj = CharClass.new(TstConstUnicodeCharSet)
    # obj = CharClass.new( [ TRange.new("\x20", "\x7e") ] )
  end
  
  # add new-line if multi-line option specified
  if( @options[:reg_options].is_multiline? )
      obj.add_ranges( [ TRange.new("\n") ] )
  end
  obj
end

#generate_char_class(val) ⇒ Object

generate POSIX character class (ie. [[:alpha:]], etc.)



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# File 'lib/regextest/front/letter.rb', line 230

def generate_char_class(val)
  if(md = val.match(/^\[\:(\^)?(\w+)\:\]$/))
    reverse = (md[1] && md[1]=="^")?true:false
    class_name = md[2]
  else
    raise "internal error, invalid POSIX class name(#{val})"
  end
  
  obj = nil
  if @options[:reg_options].is_unicode?
    obj = CharClass.new(class_name)
  else
    case class_name
    when 'alnum'
      obj = CharClass.new(
              [ TRange.new('a', 'z'), TRange.new('A', 'Z'),
                TRange.new('0', '9') ]
            )
    when 'alpha'
      obj = CharClass.new(
              [ TRange.new('a', 'z'), TRange.new('A', 'Z') ]
            )
    when 'cntrl'
      obj = CharClass.new(
              [ TRange.new("\x00", "\x1f"), TRange.new("\x7f") ]
            )
    when 'lower'
      obj = CharClass.new(
              [ TRange.new('a', 'z') ]
            )
    when 'print'
      obj = CharClass.new(
              [ TRange.new("\x20", "\x7e") ]
            )
    when 'space'
      obj = CharClass.new(
              [ TRange.new(' '), TRange.new("\n"), TRange.new("\r"), 
                TRange.new("\t"), TRange.new("\f"), TRange.new("\v") ]
            )
    when 'digit'
      obj = CharClass.new(
              [ TRange.new('0', '9') ]
            )
    when 'upper'
      obj = CharClass.new(
              [ TRange.new('A', 'Z') ]
            )
    when 'blank'
      obj = CharClass.new(
              [ TRange.new(' '), TRange.new("\t")  ]
            )
    when 'graph'
      obj = CharClass.new(
              [ TRange.new("\x21", "\x7e") ]
            )
    when 'punct'
      obj = CharClass.new(
              [ TRange.new("\x21", "\x23"), TRange.new("\x25", "\x2a"), 
                TRange.new("\x2c", "\x2f"), TRange.new("\x3a", "\x3b"),
                TRange.new("\x3f", "\x40"), TRange.new("\x5b", "\x5d"),
                TRange.new("\x5f"), TRange.new("\x7b"), TRange.new("\x7d") ]
            )
    when 'xdigit'
      obj = CharClass.new(
              [ TRange.new('a', 'f'), TRange.new('A', 'F'),
                TRange.new('0', '9') ]
            )
    when 'word'
      obj = CharClass.new(
              [ TRange.new('a', 'z'), TRange.new('A', 'Z'),
                TRange.new('0', '9'), TRange.new('_') ]
            )
    else
      raise "Error: Invalid character class #{val}"
    end
  end
  
  if reverse
    obj.set_reverse(@options)
  end
  
  obj
end

#generate_control_letter(val, type) ⇒ Object

generate control letter c-x, m-x



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# File 'lib/regextest/front/letter.rb', line 70

def generate_control_letter(val, type)
  suffix = val[-1..-1]
  codepoint = suffix.unpack("U*")[0]
  case type
  when :LEX_CONTROL_LETTER
    if    ('0'..'?').include?(suffix)
      result = codepoint - 0x20
    elsif ('@'..'_').include?(suffix)
      result = codepoint - 0x40
    elsif ('`'..'~').include?(suffix)
      result = codepoint - 0x60
    else
      raise "Internal error: invalid control letter (#{val})"
    end
  when :LEX_META_LETTER
    result = codepoint + 0x80
    pp [result].pack("U*")
  else
    raise "Internal error: invalid type #{type}"
  end
  @obj = CharClass.new([ TRange.new([result].pack("U*"))])
end

#generate_simplified_class(val) ⇒ Object

generate simplified character class



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# File 'lib/regextest/front/letter.rb', line 144

def generate_simplified_class(val)
  obj = nil
  case val
  when "\\w"
    if @options[:reg_options].is_unicode?
      obj = CharClass.new("Letter|Mark|Number|Connector_Punctuation")
    else
      obj = CharClass.new(
              [ TRange.new('a', 'z'), TRange.new('A', 'Z'),
                TRange.new('0', '9'), TRange.new('_') ]
            )
    end
  when "\\W"
    obj = CharClass.new(
            [ TRange.new("\x20", "\x2f"), TRange.new("\x3a", "\x40"),
              TRange.new("\x5b", "\x5e"), TRange.new("\x60"),
              TRange.new("\x7b", "\x7e") ]
          )
  when "\\d"
    if @options[:reg_options].is_unicode?
      #obj = CharClass.new([ TRange.new('0', '9'),  TRange.new('０', '９')])
      obj = CharClass.new("Decimal_Number")
    else
      obj = CharClass.new(
               [ TRange.new('0', '9') ]
             )
    end
  when "\\D"
    obj = CharClass.new(
            [ TRange.new("\x20", "\x2f"), TRange.new("\x3a", "\x7e") ]
          )
  when "\\h"
    obj = CharClass.new(
            [ TRange.new('0', '9') , TRange.new('a', 'f'), TRange.new('A', 'F')]
          )
  when "\\H"
    obj = CharClass.new(
            [ TRange.new("\x20", "\x2f"), TRange.new("\x3a", "\x40"),
              TRange.new("\x47", "\x60"), TRange.new("\x67", "\x7e")]
          )
  when "\\s"
    ascii_ranges = [ TRange.new(' '), TRange.new("\x9", "\xd") ]
    if @options[:reg_options].is_unicode?
      obj = CharClass.new("Line_Separator|Paragraph_Separator|Space_Separator")
      obj.add_ranges(ascii_ranges + [ TRange.new("\u{85}") ])
    else
      obj = CharClass.new(ascii_ranges)
    end
  when "\\S"
    obj = CharClass.new(
            [ TRange.new("\x21", "\x7e") ]
          )
  when "\\n", "\\r", "\\t", "\\f", "\\a", "\\e", "\\v"
    obj = CharClass.new(
            [ TRange.new(eval("\""+ string + "\"")) ]
          )
  when "\\b", "\\z", "\\A", "\\B", "\\G", "\\Z"
    warn "Ignored unsupported escape char #{val}."
  when "\\c", "\\x", "\\C", "\\M"
    raise "Error: Unsupported escape char #{string}"
  else
    raise "Error: Invalid simplifiled class #{val}"
  end
  obj
end

#generate_special_char(val) ⇒ Object

generate special character class



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# File 'lib/regextest/front/letter.rb', line 110

def generate_special_char(val)
  @data_type = :LEX_CHAR
  obj = nil
  case val
  when "\\R"
    if @options[:reg_options].is_unicode?
      # BUG: "\x0a\x0d" must be supported!
      obj = CharClass.new(
              [ TRange.new("\x0a", "\x0d"), TRange.new("\u{85}"),
                TRange.new("\u{2028}", "\u{2029}") ]
            )
    else
      # BUG: "\x0a\x0d" must be supported!
      obj = CharClass.new(
              [ TRange.new("\x0a", "\x0d") ]
            )
    end
  when "\\X"
    if @options[:reg_options].is_unicode?
      # BUG: (?>\P{M}\p{M}*)
      obj = CharClass.new("M")
      obj.set_reverse(@options)
    else
      obj = CharClass.new(
              [ TRange.new("\x20", "\x7e"), TRange.new("\n") ]
            )
    end
  else
    raise "Error: internal error, invalid special char: #{val}"
  end
  obj
end

#generate_unicode_char(val, type) ⇒ Object

generate Unicode class (ie. p… | P…)



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# File 'lib/regextest/front/letter.rb', line 211

def generate_unicode_char(val, type)
  if(md = val.match(/(p|P)\{(\^?)(\w+)\}/))
    class_name = md[3].downcase
    reverse = (md[2] && md[2]=="^")?true:false
    
    obj = CharClass.new(class_name, type)
  else
    raise "Internal error, inconsistent Unicode class #{val}"
  end
  
  # ￥P{^...} is equivalent to \p{...}
  if((md[1] == "p" && !reverse) || (md[1] == "P" && reverse))
    obj
  else      # \P{}  or \p{^}
    obj.set_reverse(@options)
  end
end

#json ⇒ Object

transform to json format



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# File 'lib/regextest/front/letter.rb', line 329

def json
  @@id += 1
  charset = @options[:reg_options].charset
  "{" +
    "\"type\": \"#{@data_type}\", \"id\": \"L#{@@id}\", \"value\": #{@obj.json}, " +
     "\"offset\": #{@offset}, \"length\": #{@length}, " +
     "\"charset\": \"#{charset}\"" +
  "}"
end

#set_attr(type, val) ⇒ Object

generate character(s) corresponding type of the character



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# File 'lib/regextest/front/letter.rb', line 33

def set_attr(type, val)
  case type
  when :LEX_CHAR, :LEX_SPACE
    @data_type = :LEX_CHAR
    @obj = CharClass.new([ TRange.new(val)])
  when :LEX_SIMPLE_ESCAPE
    @data_type = :LEX_CHAR
    @obj = CharClass.new([ TRange.new(val[1..1])])
  when :LEX_CODE_LITERAL, :LEX_ESCAPED_LETTER, :LEX_UNICODE, :LEX_OCTET
    @data_type = :LEX_CHAR
    @obj = CharClass.new([ TRange.new(eval('"'+ val + '"'))])   # convert using ruby's eval
  when :LEX_CONTROL_LETTER, :LEX_META_LETTER
    @data_type = :LEX_CHAR
    @obj = generate_control_letter(val, type)
  when :LEX_BRACKET
    @obj = Regextest::Front::Bracket.new(val)
  when :LEX_SIMPLIFIED_CLASS
    @obj = generate_simplified_class(val)
  when :LEX_POSIX_CHAR_CLASS
    @obj = generate_char_class(val)
  when :LEX_UNICODE_CLASS
    @obj = generate_unicode_char(val, type)
  when :LEX_UNICODE_CLASS_BRACKET
    @obj = generate_unicode_char(val, type)
  when :LEX_ANY_LETTER
    @obj = generate_any_char(val)
  when :LEX_SPECIAL_LETTER
    @obj = generate_special_char(val)
  when :LEX_AND_AND
    raise "Internal error: enexpected LEX_AND_AND"
    @obj = CharClass.new([TRange.new(val)])
  else
    raise "Error: internal error, type:#{type} not implemented"
  end
end

#set_options(options) ⇒ Object

set options



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# File 'lib/regextest/front/letter.rb', line 320

def set_options(options)
  TstLog("Letter set_options: #{options[:reg_options].inspect}")
  @options = options
  set_attr(@data_type, @value)
  @obj.set_options(options)
  self
end