Class: Zip::PassThruDecompressor

Inherits:
Decompressor show all
Defined in:
lib/zip/zip.rb

Overview

:nodoc:all

Constant Summary

Constants inherited from Decompressor

Decompressor::CHUNK_SIZE

Instance Method Summary collapse

Constructor Details

#initialize(inputStream, charsToRead) ⇒ PassThruDecompressor

Returns a new instance of PassThruDecompressor.



217
218
219
220
221
222
 
# File 'lib/zip/zip.rb', line 217

def initialize(inputStream, charsToRead)
  super inputStream
  @charsToRead = charsToRead
  @readSoFar = 0
  @hasReturnedEmptyString = ! EMPTY_FILE_RETURNS_EMPTY_STRING_FIRST
end

Instance Method Details

#input_finished? ⇒ Boolean

Returns:

  • (Boolean) 


244
245
246
 
# File 'lib/zip/zip.rb', line 244

def input_finished?
  (@readSoFar >= @charsToRead)
end

#produce_input ⇒ Object 



240
241
242
 
# File 'lib/zip/zip.rb', line 240

def produce_input
  sysread(Decompressor::CHUNK_SIZE)
end

#sysread(numberOfBytes = nil, buf = nil) ⇒ Object

TODO: Specialize to handle different behaviour in ruby > 1.7.0 ?



225
226
227
228
229
230
231
232
233
234
235
236
237
238
 
# File 'lib/zip/zip.rb', line 225

def sysread(numberOfBytes = nil, buf = nil)
  if input_finished?
	hasReturnedEmptyStringVal=@hasReturnedEmptyString
	@hasReturnedEmptyString=true
	return "" unless hasReturnedEmptyStringVal
	return nil
  end
  
  if (numberOfBytes == nil || @readSoFar+numberOfBytes > @charsToRead)
	numberOfBytes = @charsToRead-@readSoFar
  end
  @readSoFar += numberOfBytes
  @inputStream.read(numberOfBytes, buf)
end