Class: Flux::Loader

Inherits:
Object
  • Object
show all
Defined in:
lib/superinstance/flux-runtime/loader.rb

Overview

Binary loader for FLUX bytecode files

Constant Summary collapse

FLUX_MAGIC = 
'FLUX'.b

Instance Method Summary collapse

Instance Method Details

#has_header?(path) ⇒ Boolean

Check if file has FLUX header

Returns:

  • (Boolean) 


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# File 'lib/superinstance/flux-runtime/loader.rb', line 21

def has_header?(path)
  data = File.binread(path, 4)
  data == FLUX_MAGIC
end

#load_file(path) ⇒ Object

Load a FLUX bytecode file Returns raw bytecode, stripping the FLUX header if present



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# File 'lib/superinstance/flux-runtime/loader.rb', line 10

def load_file(path)
  data = File.binread(path)

  if data.start_with?(FLUX_MAGIC)
    strip_header(data)
  else
    data
  end
end

#parse_header(path) ⇒ Object

Parse header information



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# File 'lib/superinstance/flux-runtime/loader.rb', line 27

def parse_header(path)
  data = File.binread(path)

  unless data.start_with?(FLUX_MAGIC)
    return nil
  end

  {
    magic: data[0..3],
    version_major: data.getbyte(4) | (data.getbyte(5) << 8),
    version_minor: data.getbyte(6) | (data.getbyte(7) << 8),
    flags: data.getbyte(8) | (data.getbyte(9) << 8),
    entry_point: data.getbyte(10) | (data.getbyte(11) << 8) |
                (data.getbyte(12) << 16) | (data.getbyte(13) << 24),
    reserved: data[14..17]
  }
end