Class: ZSTDS::Stream::Raw::Decompressor

Inherits:
Abstract
  • Object
show all
Defined in:
lib/zstds/stream/raw/decompressor.rb

Constant Summary collapse

BUFFER_LENGTH_NAMES = 
i[destination_buffer_length].freeze

Instance Method Summary collapse

Methods inherited from Abstract

#closed?

Constructor Details

#initialize(options = {}) ⇒ Decompressor

Returns a new instance of Decompressor.



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# File 'lib/zstds/stream/raw/decompressor.rb', line 16

def initialize(options = {})
  options       = Option.get_decompressor_options options, BUFFER_LENGTH_NAMES
  native_stream = NativeDecompressor.new options

  super native_stream
end

Instance Method Details

#close(&writer) ⇒ Object 



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# File 'lib/zstds/stream/raw/decompressor.rb', line 56

def close(&writer)
  return nil if closed?

  Validation.validate_proc writer

  super
end

#flush(&writer) ⇒ Object 



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# File 'lib/zstds/stream/raw/decompressor.rb', line 48

def flush(&writer)
  do_not_use_after_close

  Validation.validate_proc writer

  super
end

#read(source, &writer) ⇒ Object 



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# File 'lib/zstds/stream/raw/decompressor.rb', line 23

def read(source, &writer)
  do_not_use_after_close

  Validation.validate_string source
  Validation.validate_proc writer

  total_bytes_read = 0

  loop do
    bytes_read, need_more_destination  = @native_stream.read source
    total_bytes_read                  += bytes_read

    if need_more_destination
      source = source.byteslice bytes_read, source.bytesize - bytes_read
      more_destination(&writer)
      next
    end

    break
  end

  # Please remember that "total_bytes_read" can not be equal to "source.bytesize".
  total_bytes_read
end