Class: BinaryCodec::Hash

Inherits:
ComparableSerializedType show all
Defined in:
lib/binary-codec/types/hash.rb

Direct Known Subclasses

Hash128, Hash160, Hash192, Hash256

Instance Attribute Summary

Attributes inherited from SerializedType

#bytes

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from ComparableSerializedType

#eq, #gt, #gte, #lt, #lte

Methods inherited from SerializedType

from_bytes, from_hex, from_json, get_type_by_name, #to_byte_sink, #to_bytes, #to_hex, #to_json, #to_s

Constructor Details

#initialize(bytes, width) ⇒ Hash

Returns a new instance of Hash.



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# File 'lib/binary-codec/types/hash.rb', line 6

def initialize(bytes, width)
  @bytes = bytes
  @width = width
  if bytes.length != @width
    # raise StandardError, "Invalid Hash length #{bytes.length} for width #{@width}"
    raise StandardError, "Invalid Hash length #{bytes.length}"
  end
end

Class Method Details

.from(hex_string) ⇒ Object 



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# File 'lib/binary-codec/types/hash.rb', line 15

def self.from(hex_string)
  new(hex_to_bytes(hex_string))
end

.from_parser(parser, hint = nil) ⇒ Object 



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# File 'lib/binary-codec/types/hash.rb', line 19

def self.from_parser(parser, hint = nil)
  new(parser.read(hint || width))
end

Instance Method Details

#compare_to(other) ⇒ Object 



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# File 'lib/binary-codec/types/hash.rb', line 23

def compare_to(other)
  @bytes <=> other.bytes
end

#nibblet(depth) ⇒ Integer

Returns four bits at the specified depth within a hash

Parameters:

  • depth (Integer) —

    The depth of the four bits

Returns:

  • (Integer) —

    The number represented by the four bits



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# File 'lib/binary-codec/types/hash.rb', line 31

def nibblet(depth)
  byte_index = depth > 0 ? (depth / 2).floor : 0
  b = bytes[byte_index]
  if depth.even?
    (b & 0xf0) >> 4
  else
    b & 0x0f
  end
end