Class: EacRubyUtils::Byte
Constant Summary collapse
- BIT_COUNT =
8
- BIT_INDEX_RANGE =
(0..7).freeze
- VALUE_RANGE =
(0..255).freeze
Instance Attribute Summary collapse
-
#value ⇒ Object
readonly
Returns the value of attribute value.
Class Method Summary collapse
- .assert(obj) ⇒ Object
- .from_bit_array(bit_array, big_endian = false) ⇒ Object
- .valid_bit_index?(value) ⇒ Boolean
- .valid_value?(value) ⇒ Boolean
- .validate_bit_index(value) ⇒ Object
- .validate_value(value) ⇒ Object
Instance Method Summary collapse
- #[](bit_index) ⇒ EacRubyUtils::Bit
- #bit_get(bit_index) ⇒ EacRubyUtils::Bit
- #bit_set(bit_index, bit_value) ⇒ Object
-
#initialize(value) ⇒ Byte
constructor
A new instance of Byte.
- #to_bit_array ⇒ Object
- #to_i ⇒ Integer
Constructor Details
#initialize(value) ⇒ Byte
Returns a new instance of Byte.
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# File 'lib/eac_ruby_utils/byte.rb', line 55 def initialize(value) self.value = value end |
Instance Attribute Details
#value ⇒ Object
Returns the value of attribute value.
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# File 'lib/eac_ruby_utils/byte.rb', line 52 def value @value end |
Class Method Details
.assert(obj) ⇒ Object
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# File 'lib/eac_ruby_utils/byte.rb', line 14 def assert(obj) return obj if obj.is_a?(self) new(obj.to_i) end |
.from_bit_array(bit_array, big_endian = false) ⇒ Object
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# File 'lib/eac_ruby_utils/byte.rb', line 20 def from_bit_array(bit_array, big_endian = false) bit_array = ::EacRubyUtils::BitArray.assert(bit_array) raise ::ArgumentError, "Wrong bit array size: #{bit_array.size}" if bit_array.size != BIT_COUNT bit_array = bit_array.reverse if big_endian bit_array.each_with_index.inject(new(0)) do |a, e| a.bit_set(e[1], e[0]) end end |
.valid_bit_index?(value) ⇒ Boolean
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# File 'lib/eac_ruby_utils/byte.rb', line 31 def valid_bit_index?(value) value.is_a?(::Integer) && BIT_INDEX_RANGE.include?(value) end |
.valid_value?(value) ⇒ Boolean
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# File 'lib/eac_ruby_utils/byte.rb', line 41 def valid_value?(value) value.is_a?(::Integer) && VALUE_RANGE.include?(value) end |
.validate_bit_index(value) ⇒ Object
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# File 'lib/eac_ruby_utils/byte.rb', line 35 def validate_bit_index(value) return value if valid_bit_index?(value) raise(::ArgumentError, "Invalid bit index: #{value} (Range: #{BIT_INDEX_RANGE})") end |
.validate_value(value) ⇒ Object
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# File 'lib/eac_ruby_utils/byte.rb', line 45 def validate_value(value) return value if valid_value?(value) raise(::ArgumentError, "Invalid byte value: #{value} (Range: #{VALUE_RANGE})") end |
Instance Method Details
#[](bit_index) ⇒ EacRubyUtils::Bit
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# File 'lib/eac_ruby_utils/byte.rb', line 61 def [](bit_index) bit_get(bit_index) end |
#bit_get(bit_index) ⇒ EacRubyUtils::Bit
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# File 'lib/eac_ruby_utils/byte.rb', line 67 def bit_get(bit_index) self.class.validate_bit_index(bit_index) ::EacRubyUtils::Bit.new((value & (1 << bit_index)) >> bit_index) end |
#bit_set(bit_index, bit_value) ⇒ Object
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# File 'lib/eac_ruby_utils/byte.rb', line 73 def bit_set(bit_index, bit_value) self.class.validate_bit_index(bit_index) bit = ::EacRubyUtils::Bit.assert(bit_value) mask = (1 << bit_index) self.class.new(bit.zero? ? value & ~mask : value | mask) end |
#to_bit_array ⇒ Object
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# File 'lib/eac_ruby_utils/byte.rb', line 80 def to_bit_array BIT_INDEX_RANGE.map { |bit_index| self[bit_index] } end |
#to_i ⇒ Integer
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# File 'lib/eac_ruby_utils/byte.rb', line 85 def to_i value end |