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# frozen_string_literal: true
# rubocop:todo all
# Copyright (C) 2009-2020 MongoDB Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
module BSON
# Represents a boolean type, which compares less than any other value in the
# specification.
#
# @see http://bsonspec.org/#/specification
#
# @since 2.0.0
class Boolean
# A boolean is type 0x08 in the BSON spec.
#
# @since 2.0.0
BSON_TYPE = ::String.new(8.chr, encoding: BINARY).freeze
# Deserialize a boolean from BSON.
#
# @param [ ByteBuffer ] buffer The byte buffer.
#
# @option options [ nil | :bson ] :mode Decoding mode to use.
#
# @return [ TrueClass, FalseClass ] The decoded boolean.
#
# @see http://bsonspec.org/#/specification
#
# @since 2.0.0
def self.from_bson(buffer, **options)
case v = buffer.get_byte
when TrueClass::TRUE_BYTE
true
when FalseClass::FALSE_BYTE
false
else
raise Error::BSONDecodeError, "Invalid boolean byte value: #{v}"
end
end
# Register this type when the module is loaded.
#
# @since 2.0.0
Registry.register(BSON_TYPE, self)
end
end
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