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| | # -*- encoding: binary -*-
# Copyright (C) 2013-2016 all contributors <yahns-public@yhbt.net>
# License: GPL-3.0+ (https://www.gnu.org/licenses/gpl-3.0.txt)
# frozen_string_literal: true
module Yahns::SendfileCompat # :nodoc:
def trysendfile(io, offset, count)
return 0 if count == 0
count = 0x4000 if count > 0x4000
buf = Thread.current[:yahns_sfbuf] ||= ''.dup
io.pos = offset
str = io.read(count, buf) or return # nil for EOF
n = 0
case rv = kgio_trywrite(str)
when String # partial write, keep trying
n += (str.size - rv.size)
str = rv
when :wait_writable, :wait_readable
return n > 0 ? n : rv
when nil
return n + str.size # yay!
end while true
end
end
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