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Edit File : converter.rb \| Size : 3.90 KB
# frozen_string_literal: false require_relative "utils" module RSS class Converter include Utils def initialize(to_enc, from_enc=nil) if "".respond_to?(:encode) @to_encoding = to_enc return end normalized_to_enc = to_enc.downcase.gsub(/-/, '_') from_enc \|\|= 'utf-8' normalized_from_enc = from_enc.downcase.gsub(/-/, '_') if normalized_to_enc == normalized_from_enc def_same_enc() else def_diff_enc = "def_to_#{normalized_to_enc}_from_#{normalized_from_enc}" if respond_to?(def_diff_enc) __send__(def_diff_enc) else def_else_enc(to_enc, from_enc) end end end def convert(value) if value.is_a?(String) and value.respond_to?(:encode) value.encode(@to_encoding) else value end end def def_convert(depth=0) instance_eval(<<-EOC, get_file_and_line_from_caller(depth)) def convert(value) if value.kind_of?(String) #{yield('value')} else value end end EOC end def def_iconv_convert(to_enc, from_enc, depth=0) begin require "iconv" @iconv = Iconv.new(to_enc, from_enc) def_convert(depth+1) do \|value\| <<-EOC begin @iconv.iconv(#{value}) rescue Iconv::Failure raise ConversionError.new(#{value}, "#{to_enc}", "#{from_enc}") end EOC end rescue LoadError, ArgumentError, SystemCallError raise UnknownConversionMethodError.new(to_enc, from_enc) end end def def_else_enc(to_enc, from_enc) def_iconv_convert(to_enc, from_enc, 0) end def def_same_enc() def_convert do \|value\| value end end def def_uconv_convert_if_can(meth, to_enc, from_enc, nkf_arg) begin require "uconv" def_convert(1) do \|value\| <<-EOC begin Uconv.#{meth}(#{value}) rescue Uconv::Error raise ConversionError.new(#{value}, "#{to_enc}", "#{from_enc}") end EOC end rescue LoadError require 'nkf' if NKF.const_defined?(:UTF8) def_convert(1) do \|value\| "NKF.nkf(#{nkf_arg.dump}, #{value})" end else def_iconv_convert(to_enc, from_enc, 1) end end end def def_to_euc_jp_from_utf_8 def_uconv_convert_if_can('u8toeuc', 'EUC-JP', 'UTF-8', '-We') end def def_to_utf_8_from_euc_jp def_uconv_convert_if_can('euctou8', 'UTF-8', 'EUC-JP', '-Ew') end def def_to_shift_jis_from_utf_8 def_uconv_convert_if_can('u8tosjis', 'Shift_JIS', 'UTF-8', '-Ws') end def def_to_utf_8_from_shift_jis def_uconv_convert_if_can('sjistou8', 'UTF-8', 'Shift_JIS', '-Sw') end def def_to_euc_jp_from_shift_jis require "nkf" def_convert do \|value\| "NKF.nkf('-Se', #{value})" end end def def_to_shift_jis_from_euc_jp require "nkf" def_convert do \|value\| "NKF.nkf('-Es', #{value})" end end def def_to_euc_jp_from_iso_2022_jp require "nkf" def_convert do \|value\| "NKF.nkf('-Je', #{value})" end end def def_to_iso_2022_jp_from_euc_jp require "nkf" def_convert do \|value\| "NKF.nkf('-Ej', #{value})" end end def def_to_utf_8_from_iso_8859_1 def_convert do \|value\| "#{value}.unpack('C').pack('U')" end end def def_to_iso_8859_1_from_utf_8 def_convert do \|value\| <<-EOC array_utf8 = #{value}.unpack('U') array_enc = [] array_utf8.each do \|num\| if num <= 0xFF array_enc << num else array_enc.concat "&\#\#{num};".unpack('C') end end array_enc.pack('C') EOC end end end end Back

Edit File : converter.rb | Size : 3.90 KB

# frozen_string_literal: false
require_relative "utils"

module RSS

class Converter

include Utils

def initialize(to_enc, from_enc=nil)
      if "".respond_to?(:encode)
        @to_encoding = to_enc
        return
      end
      normalized_to_enc = to_enc.downcase.gsub(/-/, '_')
      from_enc ||= 'utf-8'
      normalized_from_enc = from_enc.downcase.gsub(/-/, '_')
      if normalized_to_enc == normalized_from_enc
        def_same_enc()
      else
        def_diff_enc = "def_to_#{normalized_to_enc}_from_#{normalized_from_enc}"
        if respond_to?(def_diff_enc)
          __send__(def_diff_enc)
        else
          def_else_enc(to_enc, from_enc)
        end
      end
    end

def convert(value)
      if value.is_a?(String) and value.respond_to?(:encode)
        value.encode(@to_encoding)
      else
        value
      end
    end

def def_convert(depth=0)
      instance_eval(<<-EOC, *get_file_and_line_from_caller(depth))
      def convert(value)
        if value.kind_of?(String)
          #{yield('value')}
        else
          value
        end
      end
      EOC
    end

def def_iconv_convert(to_enc, from_enc, depth=0)
      begin
        require "iconv"
        @iconv = Iconv.new(to_enc, from_enc)
        def_convert(depth+1) do |value|
          <<-EOC
          begin
            @iconv.iconv(#{value})
          rescue Iconv::Failure
            raise ConversionError.new(#{value}, "#{to_enc}", "#{from_enc}")
          end
          EOC
        end
      rescue LoadError, ArgumentError, SystemCallError
        raise UnknownConversionMethodError.new(to_enc, from_enc)
      end
    end

def def_else_enc(to_enc, from_enc)
      def_iconv_convert(to_enc, from_enc, 0)
    end

def def_same_enc()
      def_convert do |value|
        value
      end
    end

def def_uconv_convert_if_can(meth, to_enc, from_enc, nkf_arg)
      begin
        require "uconv"
        def_convert(1) do |value|
          <<-EOC
          begin
            Uconv.#{meth}(#{value})
          rescue Uconv::Error
            raise ConversionError.new(#{value}, "#{to_enc}", "#{from_enc}")
          end
          EOC
        end
      rescue LoadError
        require 'nkf'
        if NKF.const_defined?(:UTF8)
          def_convert(1) do |value|
            "NKF.nkf(#{nkf_arg.dump}, #{value})"
          end
        else
          def_iconv_convert(to_enc, from_enc, 1)
        end
      end
    end

def def_to_euc_jp_from_utf_8
      def_uconv_convert_if_can('u8toeuc', 'EUC-JP', 'UTF-8', '-We')
    end

def def_to_utf_8_from_euc_jp
      def_uconv_convert_if_can('euctou8', 'UTF-8', 'EUC-JP', '-Ew')
    end

def def_to_shift_jis_from_utf_8
      def_uconv_convert_if_can('u8tosjis', 'Shift_JIS', 'UTF-8', '-Ws')
    end

def def_to_utf_8_from_shift_jis
      def_uconv_convert_if_can('sjistou8', 'UTF-8', 'Shift_JIS', '-Sw')
    end

def def_to_euc_jp_from_shift_jis
      require "nkf"
      def_convert do |value|
        "NKF.nkf('-Se', #{value})"
      end
    end

def def_to_shift_jis_from_euc_jp
      require "nkf"
      def_convert do |value|
        "NKF.nkf('-Es', #{value})"
      end
    end

def def_to_euc_jp_from_iso_2022_jp
      require "nkf"
      def_convert do |value|
        "NKF.nkf('-Je', #{value})"
      end
    end

def def_to_iso_2022_jp_from_euc_jp
      require "nkf"
      def_convert do |value|
        "NKF.nkf('-Ej', #{value})"
      end
    end

def def_to_utf_8_from_iso_8859_1
      def_convert do |value|
        "#{value}.unpack('C*').pack('U*')"
      end
    end

def def_to_iso_8859_1_from_utf_8
      def_convert do |value|
        <<-EOC
        array_utf8 = #{value}.unpack('U*')
        array_enc = []
        array_utf8.each do |num|
          if num <= 0xFF
            array_enc << num
          else
            array_enc.concat "&\#\#{num};".unpack('C*')
          end
        end
        array_enc.pack('C*')
        EOC
      end
    end

end

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