datastream.rb in chunky_png-1.3.13

- old
+ new

@@ -1,5 +1,7 @@
+# frozen-string-literal: true
+
 module ChunkyPNG
   # The Datastream class represents a PNG formatted datastream. It supports
   # both reading from and writing to strings, streams and files.
   #
   # A PNG datastream begins with the PNG signature, and then contains multiple
@@ -7,11 +9,11 @@
   # (IEND) chunk.
   #
   # @see ChunkyPNG::Chunk
   class Datastream
     # The signature that each PNG file or stream should begin with.
-    SIGNATURE = [137, 80, 78, 71, 13, 10, 26, 10].pack("C8").force_encoding(Encoding::BINARY).freeze
+    SIGNATURE = [137, 80, 78, 71, 13, 10, 26, 10].pack("C8").force_encoding(::Encoding::BINARY).freeze
 
     # The header chunk of this datastream.
     # @return [ChunkyPNG::Chunk::Header]
     attr_accessor :header_chunk
 
@@ -70,11 +72,11 @@
 
       # Reads a PNG datastream from an input stream
       # @param [IO] io The stream to read from.
       # @return [ChunkyPNG::Datastream] The loaded datastream instance.
       def from_io(io)
-        io.set_encoding(Encoding::BINARY)
+        io.set_encoding(::Encoding::BINARY)
         verify_signature!(io)
 
         ds = new
         while ds.end_chunk.nil?
           chunk = ChunkyPNG::Chunk.read(io)
@@ -153,15 +155,9 @@
     end
 
     ##################################################################################
     # WRITING DATASTREAMS
     ##################################################################################
-
-    # Returns an empty stream using binary encoding that can be used as stream to encode to.
-    # @return [String] An empty, binary string.
-    def self.empty_bytearray
-      ChunkyPNG::EMPTY_BYTEARRAY.dup
-    end
 
     # Writes the datastream to the given output stream.
     # @param [IO] io The output stream to write to.
     def write(io)
       io << SIGNATURE