Class: LZMA::Stream

Inherits:
Object
  • Object
show all
Defined in:
lib/lzma.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(stream, buf_len = 4096) ⇒ Stream

Returns a new instance of Stream.



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# File 'lib/lzma.rb', line 84

def initialize(stream, buf_len=4096)
  @stream, @buf_len = stream, buf_len || 4096
  @buf = (' ' * @buf_len).pointer
  @struct = C::LZMAStream.new

  ObjectSpace.define_finalizer(self, method(:finalize))
end

Class Method Details

.size ⇒ Object 



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# File 'lib/lzma.rb', line 153

def self.size
  C::LZMAStream.size
end

Instance Method Details

#avail_in ⇒ Object 



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# File 'lib/lzma.rb', line 92

def avail_in
  @struct[:avail_in]
end

#avail_out ⇒ Object 



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# File 'lib/lzma.rb', line 100

def avail_out
  @struct[:avail_out]
end

#code(action) ⇒ Object 



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# File 'lib/lzma.rb', line 139

def code(action)
  @struct[:next_out] = @buf
  @struct[:avail_out] = @buf_len
  C.lzma_code(@struct.pointer, action)
end

#decoder(limit = -1,, flags = 0) ⇒ Object

Raises:

  • (RuntimeError) 


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# File 'lib/lzma.rb', line 128

def decoder(limit=-1, flags=0)
  code = nil
  raise RuntimeError, "lzma_stream_decoder error: #{code}" if (code = C.lzma_auto_decoder(@struct.pointer, limit, flags)) != :OK
  self
end

#finalize ⇒ Object 



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# File 'lib/lzma.rb', line 149

def finalize
  C.lzma_end(@struct.pointer)
end

#next_out ⇒ Object 



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# File 'lib/lzma.rb', line 145

def next_out
  @buf.read_string_length(@buf_len - @struct[:avail_out])
end

#ptr ⇒ Object 



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# File 'lib/lzma.rb', line 112

def ptr
  @struct.pointer
end

#read ⇒ Object 



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# File 'lib/lzma.rb', line 134

def read
  @struct[:next_in] = FFI::MemoryPointer.from_string(str = @stream.read(@buf_len))
  @struct[:avail_in] = str.bytesize
end

#size ⇒ Object 



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# File 'lib/lzma.rb', line 116

def size
  @struct.size
end

#to_ffi ⇒ Object 



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# File 'lib/lzma.rb', line 108

def to_ffi
  @struct
end

#to_s ⇒ Object 



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# File 'lib/lzma.rb', line 120

def to_s
  %w[in out].flat_map {|i|
    %w[next avail total].map {|w|
      send("#{w}_#{i}".to_sym)
    }
  }
end

#total_in ⇒ Object 



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# File 'lib/lzma.rb', line 96

def total_in
  @struct[:total_in]
end

#total_out ⇒ Object 



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# File 'lib/lzma.rb', line 104

def total_out
  @struct[:total_out]
end