Sha256: 50e0f1379d783113591b497fb042a1e2eecb1a210cdb9015418c8c10bd0c43f6
Contents?: true
Size: 1.58 KB
Versions: 19
Compression:
Stored size: 1.58 KB
Contents
# frozen_string_literal: true
module Paquito
class CommentPrefixVersion
PREFIX = "#\u2620"
SUFFIX = "\u2622\n"
VERSION_POSITION = PREFIX.bytesize
HEADER_SLICE = (0..(PREFIX.bytesize + SUFFIX.bytesize))
PAYLOAD_SLICE = (PREFIX.bytesize + 1 + SUFFIX.bytesize)..-1
DEFAULT_VERSION = 0
def initialize(current_version, coders)
unless (0..9).cover?(current_version) && coders.keys.all? { |version| (0..9).cover?(version) }
raise ArgumentError, "CommentPrefixVersion versions must be between 0 and 9"
end
@current_version = current_version
@coders = coders.transform_values { |c| Paquito.cast(c) }.freeze
@current_coder = coders.fetch(current_version)
end
def dump(object)
prefix = +"#{PREFIX}#{@current_version}#{SUFFIX}"
payload = @current_coder.dump(object)
if payload.encoding == Encoding::BINARY
prefix.b << payload
else
prefix << payload
end
end
def load(payload)
payload_version, serial = extract_version(payload)
coder = @coders.fetch(payload_version) do
raise UnsupportedCodec, "Unsupported packer version #{payload_version}"
end
coder.load(serial)
end
private
def extract_version(serial)
header = serial.byteslice(HEADER_SLICE)&.force_encoding(Encoding::UTF_8)
unless header.start_with?(PREFIX) && header.end_with?(SUFFIX)
return [DEFAULT_VERSION, serial]
end
version = header.getbyte(VERSION_POSITION) - 48 # ASCII byte to number
[version, serial.byteslice(PAYLOAD_SLICE) || ""]
end
end
end
Version data entries
19 entries across 19 versions & 1 rubygems