Class: IO
- Inherits:
-
Object
- Object
- IO
- Defined in:
- lib/expect.rb
Instance Method Summary collapse
-
#expect(pat, timeout = 9999999) ⇒ Object
Reads from the IO until pattern
pat
matches or thetimeout
is over.
Instance Method Details
#expect(pat, timeout = 9999999) ⇒ Object
Reads from the IO until pattern pat
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.
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.
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# File 'lib/expect.rb', line 12 def expect(pat,timeout=9999999) buf = '' case pat when String e_pat = Regexp.new(Regexp.quote(pat)) when Regexp e_pat = pat else raise TypeError, "unsupported pattern class: #{pattern.class}" end @unusedBuf ||= '' while true if not @unusedBuf.empty? c = @unusedBuf.slice!(0).chr elsif !IO.select([self],nil,nil,timeout) or eof? then result = nil @unusedBuf = buf break else c = getc.chr end 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 |