A handy bit of code to generate patches

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Bear in mind that some people will create custom maps for their games, that may well use a fixed file size, eg. storing an absolute 256 x 256 'map' of bytes; if one of those bytes is changed -- possibly changing all instances of a certain tile in a game level -- checking the file size only will detect no change so the new patch folder won't be complete or correct. Same goes for any file where it remains the same after a 'tweak'...

Try calculating a CRC32 checksum for each file and compare the 'possible new' checksum against the old one.

I'd swear I posted CRC32 code ages ago, but it ain't there; however, MrCredo has done the hard part for you... :)

http://www.blitzbasic.com/codearcs/codearcs.php?code=790