module ChunkyPNG::Chunk

def self.read_bytes(io, length)

Raises:

(ChunkyPNG::ExpectationFailed) - If not exactly length

Returns:

(String) - A binary string of exactly length bytes.

Parameters:

length (Integer) -- The IO exact number of bytes to read.
io (IO, #read) -- The IO stream to read from.

def self.read_bytes(io, length)
  data = io.read(length)
  raise ExpectationFailed, "Couldn't read #{length} bytes from IO stream." if data.nil? || data.bytesize != length
  data
end

Class Methods