topic memory recycling of IppRegExpFind in regular expression functio in Intel® Integrated Performance Primitives

memory recycling of IppRegExpFind in regular expression function

evanyan — Wed, 29 Sep 2010 13:32:34 GMT

Hi,

When calling ippsRegExpFind_8u() to do a regex matching, the matched substrings will be stored in the argument IppRegExpFind object.

IppStatus ippsRegExpFind_8u(const Ipp8u* pSrc, int srcLen, IppRegExpState* pRegExpState, IppRegExpFind* pFind, int* pNumFind);

Should the caller recycling the memory used for storing the matched substrings? Or who will?

I didn't find an answer to it in neither the API doc or the example code.

Thanks,
-Evan

memory recycling of IppRegExpFind in regular expression functio

Igor_B_Intel1 — Thu, 30 Sep 2010 04:51:03 GMT

Hi Evan,
Actually matching substring didn't stored in the IppRegExpFind object. IppRegExpFind.pFind pointer just points inside pSrc source string where correspondingsubsting was matched. So memory recycling doesn't needed.

Igor S. Belyakov

memory recycling of IppRegExpFind in regular expression functio

evanyan — Thu, 30 Sep 2010 06:58:56 GMT

Hi Igor,

Thanks for your reply.

So IppRegExpFind.pFind doesn't refer to a substring ending with '\0'. And we need to use IppRegExpFind.lenFind to extract the matched substring. Is that right?

Thanks,
-Evan

memory recycling of IppRegExpFind in regular expression functio

Igor_B_Intel1 — Thu, 30 Sep 2010 07:01:11 GMT

Yes, absolutely.

Igor S. Belyakov