Re: ctypes structure with a variable-size field at the end
gatch breizh <[email protected]>
| Newsgroups | gmane.comp.python.ctypes |
|---|---|
| Message-ID | <[email protected]> |
Thanks Mads for your quick response. I will study your point. .:Gatch 2010/6/15 Mads Kiilerich <[email protected]> > gatch breizh wrote, On 06/15/2010 11:12 AM: > > Hi, >> >> I would like to know how to write a ctypes::Structure with a variable-size >> field at the end. >> It occurs in many protocols to have a data field with a size early >> defined. >> I have been searching a solution through the web (very usual question) for >> a while but without any success ... >> >> > It might be possible to do with some clever tricks, but I would say: > > C don't have variable-size fields, but it allows you to work with such > "fields" through careful pointer manipulations and careful reading within > the bounds. I would use the same approach with ctypes. For example by > finding the address where the field starts and cast it to a c_char*length > array. > > /Mads > ------------------------------------------------------------------------------ ThinkGeek and WIRED's GeekDad team up for the Ultimate GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the lucky parental unit. See the prize list and enter to win: http://p.sf.net/sfu/thinkgeek-promo _______________________________________________ ctypes-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ctypes-users