【转帖】how to generate a crc code
 

how to generate a crc code?
how to generate a crc code?
in our application, for some reason, we plan to use some unused areas in some sections of a dwg file to put some digital watermark. but there is a crc(4 bytes) for such a section. we don't know how to regenerate the crc for the section which has been changed by application. what's the code? we do need help.
the opendwg鈩?file specification on the member files page of the forum contains information on cyclic redundancy check computation.