module ChunkyPNG::Chunk

def self.verify_crc!(type, content, found_crc)

Raises:

(ChunkyPNG::CRCMismatch) - An exception is raised if

Parameters:

found_crc (Integer) -- The chunk's found CRC value.
content (String) -- The chunk's content.
type (String) -- The chunk's type.

def self.verify_crc!(type, content, found_crc)
  expected_crc = Zlib.crc32(content, Zlib.crc32(type))
  raise ChunkyPNG::CRCMismatch, "Chuck CRC mismatch!" if found_crc != expected_crc
end

Class Methods