reader.rb in iostreams-1.10.0

- old
+ new

@@ -73,10 +73,12 @@
       # Iterate over every line in the file/stream passing each line to supplied block in turn.
       # Returns [Integer] the number of lines read from the file/stream.
       # Note:
       # * The line delimiter is _not_ returned.
       def each
+        return to_enum(__method__) unless block_given?
+
         line_count = 0
         until eof?
           line = readline
           unless line.nil?
             yield(line)
@@ -144,22 +146,23 @@
         end
 
         data
       end
 
-      # Returns [Integer] the number of characters read into the internal buffer
-      # Returns 0 on EOF
+      # Returns whether more data is available to read
+      # Returns false on EOF
       def read_block
         return false if @eof
 
         block =
           if @read_cache_buffer
             begin
               @input_stream.read(@buffer_size, @read_cache_buffer)
             rescue ArgumentError
               # Handle arity of -1 when just 0..1
-              @read_cache_buffer = nil
+              @read_cache_buffer     = nil
+              @use_read_cache_buffer = false
               @input_stream.read(@buffer_size)
             end
           else
             @input_stream.read(@buffer_size)
           end
@@ -167,9 +170,12 @@
         # EOF reached?
         if block.nil?
           @eof = true
           return false
         end
+
+        # When less data is returned than was requested, it means the end of the file with partial data.
+        @eof = true if block.size < @buffer_size
 
         if @buffer
           @buffer << block
         else
           # Take on the encoding from the input stream