Question

how can i create an istream from a buffer unsigned char* or vector.

basically i want :

void Func(vector<unsigned char> data)
{
  someSortOfIstream x (data);

  x >> something;
}

using boost too….

Answer 1

I would recommend:

1. use a std::string (a fancy vector of chars) instead of a std::vector<unsigned char>, because that’s what it’s for. You can then use the readily available std::stringstream in the <sstream> header.

2. You can subclass a std::vector<unsigned char> and overload the operator>>() for what you need it.

   OR

   (harder but theoretically better) You can subclass std::iostream for your case and tell it what to do when you use operator>>() on it

Personnally I’d go with 1, and if you must, with 2a) because frankly, I’d have no idea how to subclass an iostream.