Converting (void*) to std::vector

Question

I have a (void*) buffer that I need to convert to std::vector before I can pass it on. Unfortunately, my C++ casting skills a

Answer 1

You can't simply cast a void* to a std::vector because the memory layout of the latter includes other objects, such as the size and the number of bytes currently allocated.

Assuming the buffer is pointed to by buf and its length is n:

vector vuc(static_cast(buf), static_cast(buf) + n);

will create a copy of the buffer that you can safely use.

[EDIT: Added static_cast, which is needed for pointer arithmetic.]