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$expect_verbose = false
class IO
def expect(pat,timeout=9999999)
buf = ''
case pat
when String
e_pat = Regexp.new(Regexp.quote(pat))
when Regexp
e_pat = pat
end
while true
if IO.select([self],nil,nil,timeout).nil? then
result = nil
break
end
c = getc.chr
buf << c
if $expect_verbose
STDOUT.print c
STDOUT.flush
end
if mat=e_pat.match(buf) then
result = [buf,*mat.to_a[1..-1]]
break
end
end
if block_given? then
yield result
else
return result
end
nil
end
end
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