Class: Saxon::ItemType::LexicalStringConversion::ByteConversion

Inherits:
Object
  • Object
show all
Defined in:
lib/saxon/item_type/lexical_string_conversion.rb

Overview

Convert Bytes. Idiomatically, Ruby uses ASCII_8BIT encoded strings to represent bytes, and so a single character represents a single byte. XDM uses the decimal value of a signed or unsigned 8 bit integer

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(kind = :signed) ⇒ ByteConversion

Returns a new instance of ByteConversion.



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# File 'lib/saxon/item_type/lexical_string_conversion.rb', line 211

def initialize(kind = :signed)
  @unpack_format = kind == :unsigned ? 'C' : 'c'
end

Instance Attribute Details

#unpack_format ⇒ Object (readonly)

Returns the value of attribute unpack_format.



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# File 'lib/saxon/item_type/lexical_string_conversion.rb', line 209

def unpack_format
  @unpack_format
end

Instance Method Details

#call(value, item_type) ⇒ Object

Raises:



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# File 'lib/saxon/item_type/lexical_string_conversion.rb', line 215

def call(value, item_type)
  raise Errors::RubyValueOutOfBounds.new(value, item_type) if value.bytesize != 1
  value = value.to_s.force_encoding(Encoding::ASCII_8BIT)
  value.unpack(unpack_format).first.to_s
end