Module: BinData::BasePrimitive::AssertedValuePlugin

Defined in:
lib/bindata/base_primitive.rb

Overview

Logic for the :asserted_value parameter

Instance Method Summary collapse

Instance Method Details

#_value ⇒ Object 



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# File 'lib/bindata/base_primitive.rb', line 199

def _value
  reading? ? @value : eval_parameter(:asserted_value)
end

#assert! ⇒ Object 



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# File 'lib/bindata/base_primitive.rb', line 217

def assert!
  assert_value(snapshot)
end

#assert_value(current_value) ⇒ Object 



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# File 'lib/bindata/base_primitive.rb', line 221

def assert_value(current_value)
  expected = eval_parameter(:asserted_value, value: current_value)
  if current_value != expected
    raise ValidityError,
          "value is '#{current_value}' but " \
          "expected '#{expected}' for #{debug_name}"
  end
end

#asserted_binary_s ⇒ Object

The asserted value as a binary string.

Rationale: while reading, #to_binary_s will use the value read in, rather than the :asserted_value. This feature is used by Skip.



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# File 'lib/bindata/base_primitive.rb', line 208

def asserted_binary_s
  value_to_binary_string(eval_parameter(:asserted_value))
end

#assign(val) ⇒ Object 



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# File 'lib/bindata/base_primitive.rb', line 194

def assign(val)
  assert_value(val)
  super(val)
end

#do_read(io) ⇒ Object

:nodoc:



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# File 'lib/bindata/base_primitive.rb', line 212

def do_read(io) # :nodoc:
  super(io)
  assert!
end