Class: Zlib::Inflate

Inherits:
ZStream show all
Defined in:
lib/pr/zlib/inflate.rb

Instance Attribute Summary

Attributes inherited from ZStream

#buf, #flags, #func, #input, #stream

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from ZStream

#ZSTREAM_IS_CLOSING, #ZSTREAM_IS_FINISHED, #ZSTREAM_IS_READY, #ZSTREAM_READY, #raise_zlib_error, #zstream_append_buffer, #zstream_append_input, #zstream_buffer_ungetc, #zstream_detach_buffer, #zstream_detach_input, #zstream_discard_input, #zstream_end, #zstream_expand_buffer, #zstream_init, #zstream_passthrough_input, #zstream_reset, #zstream_reset_input, #zstream_run, #zstream_shift_buffer, #zstream_sync

Constructor Details

#initialize(wbits = MAX_WBITS) ⇒ Inflate

Returns a new instance of Inflate.



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# File 'lib/pr/zlib/inflate.rb', line 41

def initialize(wbits = MAX_WBITS)
  @z = ZStream.new
  @z.zstream_init(InflateFuncs)
  err = inflateInit2(@z.stream, wbits)
  if err != Z_OK
    raise_zlib_error(err, @z.stream.msg)
  end
  @z.ZSTREAM_READY()
end

Class Method Details

.inflate(src) ⇒ Object 



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# File 'lib/pr/zlib/inflate.rb', line 14

def self.inflate(src)
  @z = ZStream.new
  @z.zstream_init(InflateFuncs)
  err = inflateInit(@z.stream)
  if err != Z_OK
    raise_zlib_error(err, @z.stream.msg)
  end
  @z.ZSTREAM_READY()
  begin
    dst = inflate_run(src)
  ensure
    @z.zstream_end
  end
  dst
end

.inflate_run(src) ⇒ Object 



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# File 'lib/pr/zlib/inflate.rb', line 8

def self.inflate_run(src)
  @z.zstream_run(src, src.length, Z_SYNC_FLUSH)
  @z.zstream_run('', 0, Z_FINISH)
  @z.zstream_detach_buffer()
end

Instance Method Details

#<<(src) ⇒ Object 



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# File 'lib/pr/zlib/inflate.rb', line 73

def <<(src)
  if @z.ZSTREAM_IS_FINISHED()
    if src
      @z.zstream_append_buffer(src, src.length)
    end
  else
    do_inflate(src)
    if @z.ZSTREAM_IS_FINISHED()
      @z.zstream_passthrough_input()
    end
  end
  self
end

#inflate(src) ⇒ Object 



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# File 'lib/pr/zlib/inflate.rb', line 51

def inflate(src)
  if @z.ZSTREAM_IS_FINISHED()
    if src.nil?
      dst = @z.zstream_detach_buffer()
    else
      @z.zstream_append_buffer(src, src.lenth)
      dst = ''
    end
  else
    do_inflate(src)
    dst = @z.zstream_detach_buffer()
    if @z.ZSTREAM_IS_FINISHED()
      @z.zstream_passthrough_input()
    end
  end
  if block_given?
   yield dst
  else
    dst
  end
end

#set_dictionary(dic) ⇒ Object 



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# File 'lib/pr/zlib/inflate.rb', line 103

def set_dictionary(dic)
  src = dic
  err = inflateSetDictionary(@z.stream, src, src.length)

  if err != Z_OK
    raise_zlib_error(err, @z.stream.msg)
  end

  dic
end

#sync ⇒ Object

Raises:



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# File 'lib/pr/zlib/inflate.rb', line 87

def sync
  raise GzipFile::Error, 'closed gzip stream' unless @gz.z.ZSTREAM_IS_READY()
  @z.zstream_sync(src, src.length)
end

#sync_point? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pr/zlib/inflate.rb', line 92

def sync_point?
  err = inflateSyncPoint(@z.stream)
  return true if err == 1

  if err != Z_OK
    raise_zlib_error(err, @z.stream.msg)
  end

  false
end