On Sun, Feb 10, 2008 at 02:37:41PM +0000, Jonathan Wakely wrote:
In libs/date_time/src/gregorian/greg_month.cpp we have:
short i = date_time::find_match(special_value_names, special_value_names, date_time::NumSpecialValues, s);
This results in a read past the end of the array. I believe the caller should pass NumSpecialValues-1 and the error check after it should be
if(i >= date_time::NumSpecialValues) { // match not found
It might help if the comment on find_match() was clearer: /*! find_match searches both arrays for a match to 's'. Indexing of the * arrays is from 0 to 'limit'. The index of the match is returned. Is that [0,limit) or [0,limit] ? The code does [0,limit] so the comment should say so. * Ex. "Jan" returns 0, "Dec" returns 11, "Tue" returns 2. * 'limit' can be sent in with: greg_month::max(), * greg_weekday::max() or date_time::NumSpecialValues */ The special_value_names array has NumSpecialValues members, so NumSpecialValues is not a valid index. Now I think about it, is greg_month::max() even a valid index? greg_month::max() is 12, but the array of month names has 12 members, so should be indexed [0,11] and similarly for greg_weekday::max(). Seems to me 'limit' should be sent in with greg_month::max() - greg_month::min(), given how constrained_value works. Either that or find_match() should be changed. Jon