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# frozen_string_literal: true
$expect_verbose = false

class IO
  # call-seq:
  #   IO#expect(pattern,timeout=9999999)                  ->  Array
  #   IO#expect(pattern,timeout=9999999) { |result| ... } ->  nil
  #
  # The +expect+ library adds instance method IO#expect,
  # which is similar to the
  # {TCL expect extension}[https://www.tcl.tk/man/expect5.31/expect.1.html].
  #
  # To use this method, you must require +expect+:
  #
  #   require 'expect'
  #
  # Reads from the IO until the given +pattern+ matches or the +timeout+ is over.
  #
  # It returns an array with the read buffer, followed by the matches.
  # If a block is given, the result is yielded to the block and returns nil.
  #
  # When called without a block, it waits until the input that matches the
  # given +pattern+ is obtained from the IO or the time specified as the
  # timeout passes. An array is returned when the pattern is obtained from the
  # IO. The first element of the array is the entire string obtained from the
  # IO until the pattern matches, followed by elements indicating which the
  # pattern which matched to the anchor in the regular expression.
  #
  # The optional timeout parameter defines, in seconds, the total time to wait
  # for the pattern.  If the timeout expires or eof is found, nil is returned
  # or yielded.  However, the buffer in a timeout session is kept for the next
  # expect call.  The default timeout is 9999999 seconds.
  def expect(pat,timeout=9999999)
    buf = ''.dup
    case pat
    when String
      e_pat = Regexp.new(Regexp.quote(pat))
    when Regexp
      e_pat = pat
    else
      raise TypeError, "unsupported pattern class: #{pat.class}"
    end
    @unusedBuf ||= ''
    while true
      if not @unusedBuf.empty?
        c = @unusedBuf.slice!(0)
      elsif !IO.select([self],nil,nil,timeout) or eof? then
        result = nil
        @unusedBuf = buf
        break
      else
        c = getc
      end
      buf << c
      if $expect_verbose
        STDOUT.print c
        STDOUT.flush
      end
      if mat=e_pat.match(buf) then
        result = [buf,*mat.captures]
        break
      end
    end
    if block_given? then
      yield result
    else
      return result
    end
    nil
  end
end

[-] pstore.rb [open]
[-] ripper.rb [open]
[-] optparse.rb [open]
[-] singleton.rb [open]
[+] ..
[-] tempfile.rb [open]
[+] csv
[-] time.rb [open]
[-] delegate.rb [open]
[-] forwardable.rb [open]
[-] json.rb [open]
[-] abbrev.rb [open]
[-] fileutils.rb [open]
[-] set.rb [open]
[-] csv.rb [open]
[-] coverage.rb [open]
[-] yaml.rb [open]
[-] socket.rb [open]
[-] error_highlight.rb [open]
[+] reline
[+] optparse
[-] kconv.rb [open]
[-] psych.rb [open]
[-] monitor.rb [open]
[-] date.rb [open]
[-] pp.rb [open]
[-] readline.rb [open]
[-] English.rb [open]
[-] cgi.rb [open]
[-] benchmark.rb [open]
[+] syslog
[-] logger.rb [open]
[+] openssl
[-] find.rb [open]
[+] random
[-] resolv-replace.rb [open]
[-] erb.rb [open]
[-] tmpdir.rb [open]
[+] yaml
[-] drb.rb [open]
[+] io
[+] syntax_suggest
[+] rinda
[-] expect.rb [open]
[-] mutex_m.rb [open]
[+] ruby_vm
[-] base64.rb [open]
[-] openssl.rb [open]
[-] fiddle.rb [open]
[-] ostruct.rb [open]
[+] error_highlight
[-] reline.rb [open]
[+] vendor_ruby
[-] prism.rb [open]
[+] did_you_mean
[-] shellwords.rb [open]
[-] uri.rb [open]
[+] fiddle
[+] net
[+] digest
[+] cgi
[-] ipaddr.rb [open]
[-] syntax_suggest.rb [open]
[+] set
[+] json
[+] psych
[+] forwardable
[+] open3
[+] ripper
[-] bundled_gems.rb [open]
[-] un.rb [open]
[-] optionparser.rb [open]
[-] getoptlong.rb [open]
[-] pathname.rb [open]
[-] observer.rb [open]
[+] drb
[-] weakref.rb [open]
[-] resolv.rb [open]
[-] open3.rb [open]
[+] logger
[-] did_you_mean.rb [open]
[-] objspace.rb [open]
[+] prism
[-] mkmf.rb [open]
[+] objspace
[+] erb
[-] securerandom.rb [open]
[-] open-uri.rb [open]
[-] prettyprint.rb [open]
[-] tsort.rb [open]
[-] timeout.rb [open]
[-] digest.rb [open]
[+] unicode_normalize
[+] uri