Class: RetroIDL::ASN::Tag

Inherits:
Object
  • Object
show all
Defined in:
lib/retro_idl/asn/tag.rb

Overview

X.680 section 31.2

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(**opts) ⇒ Tag

Returns a new instance of Tag.



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# File 'lib/retro_idl/asn/tag.rb', line 23

def initialize(**opts)

    errors = false

    @mod = nil
    @tag = nil
    @symbol = nil
    @encodingReference = opts[:encodingReference]
    @tagClass = opts[:class]
    @location = opts[:location]
    @tagType = opts[:type]
    

    if opts[:classNumber][:ref]

        if RetroIDL::ASN.is_identifier?(@location, opts[:classNumber][:ref])

            @symbol = opts[:classNumber][:ref]

        else

            errors = true

        end

    else

        @tagClassNumber = opts[:classNumber][:number]

        if @tagClassNumber < 0

            ASN.putError(opts[:classNumber][:location], "ClassNumber must be an integer >= 0")
            errors = true
            
        end
        
    end

    if errors

        raise ASNError.new

    end

end

Instance Attribute Details

#encodingReference ⇒ String (readonly)

Returns EncodingReference.

Returns:

  • (String) —

    EncodingReference



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# File 'lib/retro_idl/asn/tag.rb', line 70

def encodingReference
  @encodingReference
end

#tagClass ⇒ :IMPLICIT, :EXPLICIT (readonly)

Returns tag.

Returns:

  • (:IMPLICIT, :EXPLICIT) —

    tag



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# File 'lib/retro_idl/asn/tag.rb', line 73

def tagClass
  @tagClass
end

Instance Method Details

resolve symbols to definitions in module

Parameters:

  • mod (MODULE) —

    module this type belongs to

  • stack (Array) —

    objects called before this object for depth first search of recursion

Returns:

  • (MODULE) —

    object has been linked

  • (nil) —

    object has not been linked



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# File 'lib/retro_idl/asn/tag.rb', line 104

def link(mod, stack)

    if @mod.nil? or @mod != mod

        @mod = nil

        if @symbol

            if mod.symbols(@symbol).nil?

                ASN.putError(@location, SYMBOL_UNDEFINED_ERROR)

            else

                @mod = mod.symbols(@symbol).link(mod, stack)

            end

        end

    else

        @mod

    end

end

#tagClassNumber ⇒ Integer

Return the tag ClassNumber

Returns:

  • (Integer) —

    ClassNumber

Raises:

  • (ASNError) —

    tag has not been linked



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# File 'lib/retro_idl/asn/tag.rb', line 81

def tagClassNumber

    if @mod

        if @symbol

            @symbol.value

        else

            @tagClassNumber

        end

    else
        
        raise ASNError.new LINK_ERROR

    end

end

#to_s ⇒ String

Convert object to ASN.1 syntax representation

Returns:

  • (String) —

    ASN.1 syntax representation

Raises:



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# File 'lib/retro_idl/asn/tag.rb', line 133

def to_s

    result = "["

    if @encodingReference

        result << " #{@encodingReference} :"

    end

    if @tagClass

        result << " #{@tagClass}"

    end

    if @symbol

        result << " #{@symbol}"

    else

        result << " #{@tagClassNumber}"

    end

    result << " ] #{@tagType}"

end