Database conventions

The conventions of the database are as follows:

1. The path of the database is indicated by the constant DB_PATH (see db.h).

2. The contact list on a certain UIN is stored in the database path in a file called <uin>.cl The extension is determined by the constant DB_EXT which is currently set to ``.cl'' (see db.h).

3. The structure of a contact list file is a sequence of two-row entries. The first row indicates the UIN of the contact where the second indicates its nickname (see contactlist.c).

4. A contact name's length is at most MAX_CNAME_SIZE characters (see contactlist.h).

5. A UIN cannot appear twice in the contact list.