How to copy a part of a vector in a raw memory

[DBarzo]

Hi,

How can I copy a part of a vector into a memory:

long ReadAt(T* pData, long items, long& pos)
{
  ... check vector bound ....

   for(uint i=0; i<items; i++, pos++) 
   {
     *pData++ = buffer[pos];
   }
}

Daniele.

[firedraco]

I don't see any vector in there...

[DBarzo]

Sorry, I omitted some..

template<typename T>
class CBuffer
{
  private:
    std::vector<T>  buffer;

  public:
   long ReadAt(T* pData, long items, long& pos)
   {
    ... check vector bound ....

     for(uint i=0; i<items; i++, pos++) 
     {
       *pData++ = buffer[pos];
     }
   }    

};

Daniele.

[Bazzy]

Was memory at pData allocated?

[DBarzo]

Of course :-)

Like this code works, I would ask if there is a way to substitute the for() loop with, for example, the std::copy or with more efficient way.

Regards,
Daniele.

[Bazzy]

You can use the copy algorithm but it does almost the same thing. It's just shorter to call.
On the reference page you can see a sample implementation of std::copy. You can try to apply it on your code
http://www.cplusplus.com/reference/algorithm/copy/