On Thu, 06 Jun 2013 19:07:20 +0200, avib369 .
I can not find any solution where a 'c' api can update/modify a std::vector
Passing a std::vector<int>/std::vector<double> to a 'c' or fortran api function, that _reads_, works like a charm.
However we are out of luck, if we need the 'c' api, to populate the array. When passing a std::vector will 'kind of' work. But you can never use any of the following
// 1/ size() // 2/ empty() // 3/ begin()/ end()/ rbegin()/rend() // 4/ push_back() // 5/ pop_back()
You have to separately carry the size of the vector, in order to use it. You then just end up using it like a 'c' array. I thought there may have been way of updating the vectors begin/finish after the api call. But there does not appear to any way to do this.
One solution would be to use 'c' array when calling the interface, and then copy to a std::vector. However this would degrade performance, when dealing large data sets.
Is there any boost libraries/containers that are applicable or that can handle this issue ? It must have similar properties to a vector, like contiguous memory ?
I have included a sample program below, to demonstrate.
Before resorting back to 'c' array I was wondering if any one else has come across this problem ?
Ta, Avi
Hi Avi, I was once fascinated how gtk reimplements the objects in C. Maybe you can use gtk array (https://developer.gnome.org/glib/stable/glib-Arrays.html)? -- Slava