class Erlang::ETF::BitBinary
| 1 | 4 | 1 | Len | | — | — | —- | —- | | 77 | Len | Bits | Data |
This term represents a bitstring whose length in bits is not a multiple of 8 (created using the bit syntax in R12B and later). The `Len` field is an unsigned 4 byte integer (big endian). The `Bits` field is the number of bits that are used in the last byte in the data field, counting from the most significant bit towards the least significant.
(see [`BIT_BINARY_EXT`])
[`BIT_BINARY_EXT`]: erlang.org/doc/apps/erts/erl_ext_dist.html#BIT_BINARY_EXT
Constants
- HEAD
- UINT32BE
- UINT8
Public Class Methods
[](term)
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# File lib/erlang/etf/bit_binary.rb, line 28 def [](term) term = Erlang.from(term) if not term.kind_of?(Erlang::Bitstring) return new(term) end
erlang_load(buffer)
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# File lib/erlang/etf/bit_binary.rb, line 33 def erlang_load(buffer) size, bits, = buffer.read(5).unpack(HEAD) data = buffer.read(size) if size > 0 data.setbyte(-1, data.getbyte(-1) >> (8 - bits)) end return new(Erlang::Bitstring[data, bits: bits]) end
new(term)
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# File lib/erlang/etf/bit_binary.rb, line 43 def initialize(term) raise ArgumentError, "term must be of type Erlang::Bitstring" if not term.kind_of?(Erlang::Bitstring) and not term.kind_of?(Erlang::Binary) @term = term end
Public Instance Methods
erlang_dump(buffer = ::String.new.force_encoding(BINARY_ENCODING))
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# File lib/erlang/etf/bit_binary.rb, line 48 def erlang_dump(buffer = ::String.new.force_encoding(BINARY_ENCODING)) buffer << BIT_BINARY_EXT buffer << [@term.bytesize, @term.bits].pack(HEAD) buffer << Erlang::ETF::Term.binary_encoding(@term.data) if @term.bytesize > 0 buffer.setbyte(-1, buffer.getbyte(-1) << (8 - @term.bits)) end return buffer end