add created/modified/last accessed date

[ZeroSkill1]

I know this isn't exactly a good idea.

As mentioned in issue #758, GodMode9 currently does not show file creation date. It shows whatever FatFs returns in FILINFO, which is creation date (in case of directories) and modification date (in case of files).

According to this document, it's possible to get:

• Creation Date + Time
• Modification Date + Time
• Last Accessed Date (no Time here)

This may not seem like a good idea at first, but I got it working by modifying FatFs a tiny bit.
I made sure not to mess with anything that isn't related. I also made sure the dates are correct for drives and virtual drives, keeping the date that was previously intended to be shown.

FILINFO only stored one Date and Time, so the first thing I did was adding new fields to store the other Dates/Times.
Then, I made sure the Dates/Times were updated accordingly (for writes, file/dir creation, etc.).

This is what I got after that:

The data shown is identical to the data shown in the Windows Explorer "Properties" menu, so it is at the very least correct.
I have also tested the modified date, by creating a file, modifying it in the built in hex editor and saving it. The modified date/last access date is updated accordingly.

Overall it's a pretty minimal change. I understand that it may not be something you wish to add, but if it works, IMO, why not.

Let me know what you think.

[eku]

Please check your settings for code indentation and spaces versus tabs.

[Wolfvak]

Honestly I'd feel far more comfortable if this were pushed to http://elm-chan.org/fsw/ff/bd/ and the original author merged it in themselves, then we can update the library and use it too.

[d0k3]

@Wolfvak - I'm still unsure about this one. While I like the functionality, and think @ZeroSkill1 did a good implementation here, it will make FATFS updating hard. However an update may not be required, as most recent updates in FATFS deals with ExFAT, which we're not really interested in. @aspargas2 - what do you think?