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# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you 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 ArrowFormat
class Bitmap
include Enumerable
def initialize(buffer, n_values)
@buffer = buffer
@n_values = n_values
end
def each
return to_enum(__method__) unless block_given?
n_bytes = @n_values / 8
@buffer.each(:U8, 0, n_bytes) do |offset, value|
7.times do |i|
yield(value & (1 << (i % 8)))
end
end
remained_bits = @n_values % 8
unless remained_bits.zero?
value = @buffer.get_value(:U8, n_bytes)
remained_bits.times do |i|
yield(value & (1 << (i % 8)))
end
end
end
end
end
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