Class: JavaClass::ClassFile::ClassMagic

Inherits:
Object
  • Object
show all
Defined in:
lib/javaclass/classfile/class_magic.rb

Overview

The CAFEBABE magic of a class file. This just checks if CAFEBABE is here.

Author

Peter Kofler

Constant Summary collapse

CAFE_BABE =

ZenTest SKIP

"\xCA\xFE\xBA\xBE"

Instance Method Summary collapse

Constructor Details

#initialize(data, start = 0) ⇒ ClassMagic

Check the class magic in the data beginning at position start (which is usually 0).



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# File 'lib/javaclass/classfile/class_magic.rb', line 11

def initialize(data, start=0)
  # "parsing"
  @bytes = data[start..start+3]
end

Instance Method Details

#bytes ⇒ Object

Return the value of the magic in this class.



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# File 'lib/javaclass/classfile/class_magic.rb', line 22

def bytes
  @bytes.dup
end

#valid? ⇒ Boolean

Return true if the data was valid, i.e. if the class started with CAFEBABE.

Returns:

  • (Boolean) 


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# File 'lib/javaclass/classfile/class_magic.rb', line 17

def valid?
  @bytes == CAFE_BABE
end