Programming

Can somebody write a solution how to deal with negative unixdates in C/C++?

e.g. I should convert -222832800 into 12-10-1962.

I've read some texts about unixdate. They say that negative values are not officially supported, some functions use -1 to report a conversion error. How can I use this stuff? I've to store birthdays in UNIX - time format and itcan be less than 1970...

I would not use negative time line that. The unix timestamp is intended only to record when system events occurred.

You will need to use your own format.

Yeah, but I get these dates from an external DB, where these dates are stored as integers. And I can't affect the DB structure

Angler,

I'm not sure if anyone has helped you with this, but in case not - here goes.

UNIX times are stored as unsigned integers. If you're getting a negative value, it's because the number is large and is using that "most significant bit" - hence it appears to be signed, but really is not. You can count on legal values being positive at all times. If you appear to be getting a negative value, then try re-casting as an unsigned integer when you obtain the value from the database. Unfortunately if the value was stored in the database as negative, the original error was on the part of whoever set up the schema.

S.