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| | # -*- encoding: binary -*-
# Copyright (C) 2009-2014, Eric Wong <normalperson@yhbt.net> et. al.
# License: GPLv3 or later (https://www.gnu.org/licenses/gpl-3.0.txt)
require 'io/extra' # gem install io-extra
module Yahns::SendfileCompat
def trysendfile(io, offset, count)
return 0 if count == 0
count = 0x4000 if count > 0x4000
str = IO.pread(io.fileno, count, offset)
if count > str.bytesize
raise EOFError, "end of file reached"
end
n = 0
case rv = kgio_trywrite(str)
when String # partial write, keep trying
n += (str.bytesize - rv.bytesize)
str = rv
when :wait_writable, :wait_readable
return n > 0 ? n : rv
when nil
return n + str.bytesize # yay!
end while true
end
end
class IO
include Yahns::SendfileCompat
end
|