JezK

Edit File: content_transfer_encoding_parser.rb

# frozen_string_literal: true
require "mail/utilities"
require "mail/parser_tools"

module Mail::Parsers
  module ContentTransferEncodingParser
    extend Mail::ParserTools

ContentTransferEncodingStruct = Struct.new(:encoding, :error)

class << self
      attr_accessor :_trans_keys
      private :_trans_keys, :_trans_keys=
    end
    self._trans_keys = [
      0, 0, 9, 126, 10, 10,
      9, 32, 10, 10, 9,
      32, 10, 10, 9, 32,
      9, 126, 1, 244, 1, 244,
      10, 10, 9, 32, 0,
      244, 128, 191, 160, 191,
      128, 191, 128, 159, 144, 191,
      128, 191, 128, 143, 9,
      126, 9, 59, 9, 59,
      9, 40, 9, 40, 0, 0,
      0,
    ]

class << self
      attr_accessor :_key_spans
      private :_key_spans, :_key_spans=
    end
    self._key_spans = [
      0, 118, 1, 24, 1, 24, 1, 24,
      118, 244, 244, 1, 24, 245, 64, 32,
      64, 32, 48, 64, 16, 118, 51, 51,
      32, 32, 0,
    ]

class << self
      attr_accessor :_index_offsets
      private :_index_offsets, :_index_offsets=
    end
    self._index_offsets = [
      0, 0, 119, 121, 146, 148, 173, 175,
      200, 319, 564, 809, 811, 836, 1082, 1147,
      1180, 1245, 1278, 1327, 1392, 1409, 1528, 1580,
      1632, 1665, 1698,
    ]

class << self
      attr_accessor :_indicies
      private :_indicies, :_indicies=
    end
    self._indicies = [
      0, 1, 1, 1, 2, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 0,
      3, 3, 3, 3, 3, 3, 3, 4,
      1, 3, 3, 3, 3, 3, 1, 3,
      3, 3, 3, 3, 3, 3, 3, 3,
      3, 1, 1, 1, 1, 1, 1, 1,
      3, 3, 3, 3, 3, 3, 3, 3,
      3, 3, 3, 3, 3, 3, 3, 3,
      3, 3, 3, 3, 3, 3, 3, 3,
      3, 3, 1, 1, 1, 3, 3, 3,
      3, 3, 3, 3, 3, 3, 3, 3,
      3, 3, 3, 3, 3, 3, 3, 3,
      3, 3, 3, 3, 3, 3, 3, 3,
      3, 3, 3, 3, 3, 3, 1, 5,
      1, 0, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      0, 1, 6, 1, 7, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 7, 1, 8, 1, 9,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 9, 1,
      10, 1, 1, 1, 11, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 10,
      12, 12, 12, 12, 12, 12, 12, 13,
      1, 12, 12, 12, 12, 12, 1, 12,
      12, 12, 12, 12, 12, 12, 12, 12,
      12, 1, 1, 1, 1, 1, 1, 1,
      12, 12, 12, 12, 12, 12, 12, 12,
      12, 12, 12, 12, 12, 12, 12, 12,
      12, 12, 12, 12, 12, 12, 12, 12,
      12, 12, 1, 1, 1, 12, 12, 12,
      12, 12, 12, 12, 12, 12, 12, 12,
      12, 12, 12, 12, 12, 12, 12, 12,
      12, 12, 12, 12, 12, 12, 12, 12,
      12, 12, 12, 12, 12, 12, 1, 14,
      14, 14, 14, 14, 14, 14, 14, 14,
      1, 14, 14, 15, 14, 14, 14, 14,
      14, 14, 14, 14, 14, 14, 14, 14,
      14, 14, 14, 14, 14, 14, 14, 14,
      14, 14, 14, 14, 14, 14, 16, 17,
      14, 14, 14, 14, 14, 14, 14, 14,
      14, 14, 14, 14, 14, 14, 14, 14,
      14, 14, 14, 14, 14, 14, 14, 14,
      14, 14, 14, 14, 14, 14, 14, 14,
      14, 14, 14, 14, 14, 14, 14, 14,
      14, 14, 14, 14, 14, 14, 14, 14,
      14, 14, 18, 14, 14, 14, 14, 14,
      14, 14, 14, 14, 14, 14, 14, 14,
      14, 14, 14, 14, 14, 14, 14, 14,
      14, 14, 14, 14, 14, 14, 14, 14,
      14, 14, 14, 14, 14, 14, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      19, 19, 19, 19, 19, 19, 19, 19,
      19, 19, 19, 19, 19, 19, 19, 19,
      19, 19, 19, 19, 19, 19, 19, 19,
      19, 19, 19, 19, 19, 19, 20, 21,
      21, 21, 21, 21, 21, 21, 21, 21,
      21, 21, 21, 22, 21, 21, 23, 24,
      24, 24, 25, 1, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 1, 26, 26,
      27, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 28, 29, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 30,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 31, 31, 31,
      31, 31, 31, 31, 31, 31, 31, 31,
      31, 31, 31, 31, 31, 31, 31, 31,
      31, 31, 31, 31, 31, 31, 31, 31,
      31, 31, 31, 32, 33, 33, 33, 33,
      33, 33, 33, 33, 33, 33, 33, 33,
      34, 33, 33, 35, 36, 36, 36, 37,
      1, 38, 1, 26, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 26, 1, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 31, 31,
      31, 31, 31, 31, 31, 31, 31, 31,
      31, 31, 31, 31, 31, 31, 31, 31,
      31, 31, 31, 31, 31, 31, 31, 31,
      31, 31, 31, 31, 32, 33, 33, 33,
      33, 33, 33, 33, 33, 33, 33, 33,
      33, 34, 33, 33, 35, 36, 36, 36,
      37, 1, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 26, 26, 26, 26, 26, 26,
      26, 26, 1, 31, 31, 31, 31, 31,
      31, 31, 31, 31, 31, 31, 31, 31,
      31, 31, 31, 31, 31, 31, 31, 31,
      31, 31, 31, 31, 31, 31, 31, 31,
      31, 31, 31, 1, 31, 31, 31, 31,
      31, 31, 31, 31, 31, 31, 31, 31,
      31, 31, 31, 31, 31, 31, 31, 31,
      31, 31, 31, 31, 31, 31, 31, 31,
      31, 31, 31, 31, 31, 31, 31, 31,
      31, 31, 31, 31, 31, 31, 31, 31,
      31, 31, 31, 31, 31, 31, 31, 31,
      31, 31, 31, 31, 31, 31, 31, 31,
      31, 31, 31, 31, 1, 31, 31, 31,
      31, 31, 31, 31, 31, 31, 31, 31,
      31, 31, 31, 31, 31, 31, 31, 31,
      31, 31, 31, 31, 31, 31, 31, 31,
      31, 31, 31, 31, 31, 1, 33, 33,
      33, 33, 33, 33, 33, 33, 33, 33,
      33, 33, 33, 33, 33, 33, 33, 33,
      33, 33, 33, 33, 33, 33, 33, 33,
      33, 33, 33, 33, 33, 33, 33, 33,
      33, 33, 33, 33, 33, 33, 33, 33,
      33, 33, 33, 33, 33, 33, 1, 33,
      33, 33, 33, 33, 33, 33, 33, 33,
      33, 33, 33, 33, 33, 33, 33, 33,
      33, 33, 33, 33, 33, 33, 33, 33,
      33, 33, 33, 33, 33, 33, 33, 33,
      33, 33, 33, 33, 33, 33, 33, 33,
      33, 33, 33, 33, 33, 33, 33, 33,
      33, 33, 33, 33, 33, 33, 33, 33,
      33, 33, 33, 33, 33, 33, 33, 1,
      33, 33, 33, 33, 33, 33, 33, 33,
      33, 33, 33, 33, 33, 33, 33, 33,
      1, 39, 1, 1, 1, 40, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      39, 41, 41, 41, 41, 41, 41, 41,
      42, 1, 41, 41, 41, 41, 41, 1,
      41, 41, 41, 41, 41, 41, 41, 41,
      41, 41, 1, 43, 1, 1, 1, 1,
      1, 41, 41, 41, 41, 41, 41, 41,
      41, 41, 41, 41, 41, 41, 41, 41,
      41, 41, 41, 41, 41, 41, 41, 41,
      41, 41, 41, 1, 1, 1, 41, 41,
      41, 41, 41, 41, 41, 41, 41, 41,
      41, 41, 41, 41, 41, 41, 41, 41,
      41, 41, 41, 41, 41, 41, 41, 41,
      41, 41, 41, 41, 41, 41, 41, 1,
      7, 1, 1, 1, 44, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 7,
      1, 1, 1, 1, 1, 1, 1, 45,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 9, 1, 46, 1, 1, 1,
      47, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 46, 1, 1, 1, 1,
      1, 1, 1, 48, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 49, 1,
      9, 1, 1, 1, 50, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 9,
      1, 1, 1, 1, 1, 1, 1, 51,
      1, 49, 1, 1, 1, 52, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1,
      49, 1, 1, 1, 1, 1, 1, 1,
      53, 1, 1, 0,
    ]

class << self
      attr_accessor :_trans_targs
      private :_trans_targs, :_trans_targs=
    end
    self._trans_targs = [
      1, 0, 2, 21, 8, 3, 5, 22,
      7, 24, 1, 2, 21, 8, 10, 11,
      10, 26, 13, 14, 15, 16, 17, 18,
      19, 20, 10, 11, 10, 26, 13, 14,
      15, 16, 17, 18, 19, 20, 12, 22,
      4, 21, 23, 24, 4, 23, 22, 4,
      23, 24, 6, 25, 6, 25,
    ]

class << self
      attr_accessor :_trans_actions
      private :_trans_actions, :_trans_actions=
    end
    self._trans_actions = [
      0, 0, 0, 1, 2, 0, 0, 0,
      0, 0, 3, 3, 4, 5, 6, 6,
      7, 8, 6, 6, 6, 6, 6, 6,
      6, 6, 0, 0, 2, 9, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 10,
      10, 0, 11, 10, 0, 2, 3, 3,
      5, 3, 0, 2, 3, 5,
    ]

class << self
      attr_accessor :_eof_actions
      private :_eof_actions, :_eof_actions=
    end
    self._eof_actions = [
      0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 10, 0, 3,
      0, 3, 0,
    ]

class << self
      attr_accessor :start
    end
    self.start = 1
    class << self
      attr_accessor :first_final
    end
    self.first_final = 21
    class << self
      attr_accessor :error
    end
    self.error = 0

class << self
      attr_accessor :en_comment_tail
    end
    self.en_comment_tail = 9
    class << self
      attr_accessor :en_main
    end
    self.en_main = 1

def self.parse(data)
      data = data.dup.force_encoding(Encoding::ASCII_8BIT) if data.respond_to?(:force_encoding)

content_transfer_encoding = ContentTransferEncodingStruct.new("")
      return content_transfer_encoding if Mail::Utilities.blank?(data)

# Parser state
      encoding_s = nil

# 5.1 Variables Used by Ragel
      p = 0
      eof = pe = data.length
      stack = []

begin
        p ||= 0
        pe ||= data.length
        cs = start
        top = 0
      end

begin
        testEof = false
        _slen, _trans, _keys, _inds, _acts, _nacts = nil
        _goto_level = 0
        _resume = 10
        _eof_trans = 15
        _again = 20
        _test_eof = 30
        _out = 40
        while true
          if _goto_level <= 0
            if p == pe
              _goto_level = _test_eof
              next
            end
            if cs == 0
              _goto_level = _out
              next
            end
          end
          if _goto_level <= _resume
            _keys = cs << 1
            _inds = _index_offsets[cs]
            _slen = _key_spans[cs]
            _wide = data[p].ord
            _trans = if (_slen > 0 &&
                         _trans_keys[_keys] <= _wide &&
                         _wide <= _trans_keys[_keys + 1])
                       _indicies[_inds + _wide - _trans_keys[_keys]]
                     else
                       _indicies[_inds + _slen]
                     end
            cs = _trans_targs[_trans]
            if _trans_actions[_trans] != 0
              case _trans_actions[_trans]
              when 1
                begin
                  encoding_s = p
                end
              when 10
                begin
                  content_transfer_encoding.encoding = chars(data, encoding_s, p - 1).downcase
                end
              when 3
                begin
                end
              when 6
                begin
                end
              when 2
                begin
                  begin
                    stack[top] = cs
                    top += 1
                    cs = 9
                    _goto_level = _again
                    next
                  end
                end
              when 9
                begin
                  begin
                    top -= 1
                    cs = stack[top]
                    _goto_level = _again
                    next
                  end
                end
              when 11
                begin
                  content_transfer_encoding.encoding = chars(data, encoding_s, p - 1).downcase
                end
                begin
                  begin
                    stack[top] = cs
                    top += 1
                    cs = 9
                    _goto_level = _again
                    next
                  end
                end
              when 4
                begin
                end
                begin
                  encoding_s = p
                end
              when 5
                begin
                end
                begin
                  begin
                    stack[top] = cs
                    top += 1
                    cs = 9
                    _goto_level = _again
                    next
                  end
                end
              when 7
                begin
                end
                begin
                  begin
                    stack[top] = cs
                    top += 1
                    cs = 9
                    _goto_level = _again
                    next
                  end
                end
              when 8
                begin
                end
                begin
                  begin
                    top -= 1
                    cs = stack[top]
                    _goto_level = _again
                    next
                  end
                end
              end
            end
          end
          if _goto_level <= _again
            if cs == 0
              _goto_level = _out
              next
            end
            p += 1
            if p != pe
              _goto_level = _resume
              next
            end
          end
          if _goto_level <= _test_eof
            if p == eof
              case _eof_actions[cs]
              when 10
                begin
                  content_transfer_encoding.encoding = chars(data, encoding_s, p - 1).downcase
                end
              when 3
                begin
                end
              end
            end
          end
          if _goto_level <= _out
            break
          end
        end
      end

if p != eof || cs < 21
        raise Mail::Field::IncompleteParseError.new(Mail::ContentTransferEncodingElement, data, p)
      end

content_transfer_encoding
    end
  end
end

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