def [](tag)
      val = nil
      tagc = ::FFI::AutoPointer.new(RPM::C.rpmtdNew, Package.method(:release_td))

      return nil if RPM::C.headerGet(ptr, tag, tagc,
                                     RPM::C::HEADERGET_MINMEM) == 0

      type = RPM::C.rpmtdType(tagc)
      count = RPM::C.rpmtdCount(tagc)
      ret_type = RPM::C.rpmTagGetReturnType(tag)

      method_name = case type
                    when :int8_type, :char_type, :int16_type, :int32_type, :int64_type then :rpmtdGetNumber
                    when :string_type, :string_array_type, :bin_type then :rpmtdGetString
                    else raise NotImplementedError, "Don't know how to retrieve type '#{type}'"
                    end

      is_array = if count > 1 then true
                 elsif ret_type == :array_return_type then true
                 elsif type == :string_array_type then true
                 else false
                 end

      if is_array
        ret = []
        RPM::C.rpmtdInit(tagc)
        ret << RPM::C.send(method_name, tagc) while RPM::C.rpmtdNext(tagc) != -1
        return ret
      end

      RPM::C.send(method_name, tagc)
    end
def [](tag)
      val = nil
      tagc = ::FFI::AutoPointer.new(RPM::C.rpmtdNew, Package.method(:release_td))

      return nil if RPM::C.headerGet(ptr, tag, tagc,
                                     RPM::C::HEADERGET_MINMEM) == 0

      type = RPM::C.rpmtdType(tagc)
      count = RPM::C.rpmtdCount(tagc)
      ret_type = RPM::C.rpmTagGetReturnType(tag)

      method_name = case type
                    when :int8_type, :char_type, :int16_type, :int32_type, :int64_type then :rpmtdGetNumber
                    when :string_type, :string_array_type, :bin_type then :rpmtdGetString
                    else raise NotImplementedError, "Don't know how to retrieve type '
                    end

      is_array = if count > 1 then true
                 elsif ret_type == :array_return_type then true
                 elsif type == :string_array_type then true
                 else false
                 end

      if is_array
        ret = []
        RPM::C.rpmtdInit(tagc)
        ret << RPM::C.send(method_name, tagc) while RPM::C.rpmtdNext(tagc) != -1
        return ret
      end

      RPM::C.send(method_name, tagc)
    end
def [] ( tag ) val = nil tagc = :: FFI :: AutoPointer . new ( RPM :: C . rpmtdNew , Package . method ( :release_td ) ) return nil if RPM :: C . headerGet ( ptr , tag , tagc , RPM :: C :: HEADERGET_MINMEM ) == 0 type = RPM :: C . rpmtdType ( tagc ) count = RPM :: C . rpmtdCount ( tagc ) ret_type = RPM :: C . rpmTagGetReturnType ( tag ) method_name = case type when :int8_type , :char_type , :int16_type , :int32_type , :int64_type then :rpmtdGetNumber when :string_type , :string_array_type , :bin_type then :rpmtdGetString else raise NotImplementedError , "Don't know how to retrieve type '#{type}'" end is_array = if count > 1 then true elsif ret_type == :array_return_type then true elsif type == :string_array_type then true else false end if is_array ret = [ ] RPM :: C . rpmtdInit ( tagc ) ret << RPM :: C . send ( method_name , tagc ) while RPM :: C . rpmtdNext ( tagc ) != - 1 return ret end RPM :: C . send ( method_name , tagc ) end
Access a header entry
 @param [Number] tag Tag to return
 @return [] Value of the entry
 @example
     pkg => #<RPM::Package name="xmlgraphics-fop", version=#<RPM::Version v="1.0", r="22.4">>
     pkg[:name] => "xmlgraphics-fop"

   or if you have the old ruby-rpm compat loaded

     require 'rpm/compat'
     pkg[RPM::TAG_NAME] => "xmlgraphics-fop"

 @return [String, Fixnum, Array<String>, Array<Fixnum>, nil]
   The value of the entry
Access a header entry @param [ Number ] tag Tag to return @return [] Value of the entry @example pkg = > #<RPM :: Package name = xmlgraphics - fop version = #<RPM :: Version v = 1 . 0 r = 22 . 4 >> pkg [ : name ] = > xmlgraphics - fop