Class: Canoser::Cursor

Inherits:
Object
  • Object
show all
Defined in:
lib/canoser/cursor.rb

Instance Method Summary collapse

Constructor Details

#initialize(bytes, offset = 0) ⇒ Cursor

Returns a new instance of Cursor.



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# File 'lib/canoser/cursor.rb', line 3

def initialize(bytes, offset=0)
	@bytes = bytes
	@offset = offset
end

Instance Method Details

#finished? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/canoser/cursor.rb', line 20

def finished?
	@offset == @bytes.size
end

#peek_bytes(size) ⇒ Object

Raises:



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# File 'lib/canoser/cursor.rb', line 15

def peek_bytes(size)
  raise ParseError.new("#{@offset+size} exceed bytes size:#{@bytes.size}") if @offset+size > @bytes.size
  @bytes[@offset, size]
end

#read_bytes(size) ⇒ Object

Raises:



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# File 'lib/canoser/cursor.rb', line 8

def read_bytes(size)
	raise ParseError.new("#{@offset+size} exceed bytes size:#{@bytes.size}") if @offset+size > @bytes.size
	ret = @bytes[@offset, size]
	@offset += size
	ret
end