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# Copyright 2020 Google LLC
#
# 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.
# Copyright 2015 Google 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.
require 'google/apis/core/http_command'
require 'google/apis/core/upload'
require 'google/apis/core/download'
require 'addressable/uri'
require 'securerandom'
module Google
module Apis
module Core
class CompositeIO
def initialize(*ios)
@ios = ios.flatten
@pos = 0
@index = 0
@sizes = @ios.map(&:size)
end
def read(length = nil, buf = nil)
buf = buf ? buf.replace('') : ''
begin
io = @ios[@index]
break if io.nil?
result = io.read(length)
if result
buf << result
if length
length -= result.length
break if length == 0
end
end
@index += 1
end while @index < @ios.length
buf.length > 0 ? buf : nil
end
def size
@sizes.reduce(:+)
end
alias_method :length, :size
def pos
@pos
end
def pos=(pos)
fail ArgumentError, "Position can not be negative" if pos < 0
@pos = pos
new_index = nil
@ios.each_with_index do |io,idx|
size = io.size
if pos <= size
new_index ||= idx
io.pos = pos
pos = 0
else
io.pos = size
pos -= size
end
end
@index = new_index unless new_index.nil?
end
def rewind
self.pos = 0
end
end
end
end
end
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