Class: Hyperll::Varint

Inherits:
Object
  • Object
show all
Defined in:
lib/hyperll/varint.rb

Class Method Summary collapse

Class Method Details

.read_unsigned_var_int(bytes) ⇒ Object 



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# File 'lib/hyperll/varint.rb', line 3

def self.read_unsigned_var_int(bytes)
  value, i, b = 0, 0, 0
  while (b = bytes.shift) & 0x80 != 0
    value |= (b & 0x7F) << i

    i += 7
    raise "Variable length quantity is too long" if i > 35
  end

  value | (b << i)
end

.write_unsigned_var_int(value) ⇒ Object 



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# File 'lib/hyperll/varint.rb', line 15

def self.write_unsigned_var_int(value)
  bytes = []
  while (value & 0xFFFFFF80) != 0
    bytes << ((value & 0x7F) | 0x80)
    value >>= 7
  end

  bytes << (value & 0x7F)
  bytes
end