From: "drbrain (Eric Hodel)" <drbrain@...7.net>
Date: 2012-04-10T05:16:20+09:00
Subject: [ruby-core:44235] [ruby-trunk - Bug #6273] confusing rdoc on Zlib


Issue #6273 has been updated by drbrain (Eric Hodel).

Category set to DOC
Assignee set to drbrain (Eric Hodel)


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Bug #6273: confusing rdoc on Zlib
https://bugs.ruby-lang.org/issues/6273#change-25761

Author: lparra (Luis Parravicini)
Status: Open
Priority: Normal
Assignee: drbrain (Eric Hodel)
Category: DOC
Target version: 
ruby -v: trunk


=begin
The rdoc at ext/zlib/zlib.c gives some examples of code to deflate/inflate a string. If you try to use them to actually deflate/inflate it gives an error inflating.

The deflate snippet is:

  def deflate(string, level)
     z = Zlib::Deflate.new(level)
     dst = z.deflate(string, Zlib::NO_FLUSH)
     z.close
     dst
   end

And the inflate snippet is:

 def inflate(string)
   zstream = Zlib::Inflate.new
   buf = zstream.inflate(string)
   zstream.finish
   zstream.close
   buf
 end

And then testing them with:

  inflate(deflate("test-string", 6))

It returns "Zlib::BufError: buffer error".

The error is because the flush parameter used is NO_FLUSH. It should be changed to FINISH for the deflating/inflating to work.


=end


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