streambuf

I have a memory block (opaque), that I want to store in a Blob in mySQL through their C++ adapter. The adapter expects a istream: virtual void setBlob(unsigned int parameterIndex, std::istream * blob) = 0; So my question is: how can I create a std::istream from this memory block (typed as char*). It's not a string as it is not null-terminated (but I know its length of course). I could not find a way to do it without copying my memory block for example in a std::string. I think this is a bit wasteful. Something like this doesn't work: std::streambuf istringbuf(blockPtr, blockLength); std:

For educational purposes I want to create a ostream and stream buffer to do: fix endians when doing << myVar; store in a deque container instead of using std:cout or writing to a file log extra data, such as how many times I did <<, how many times I did .write, the amount of bytes I written and how many times I flush(). But I do not need all the info. I tried overloading but failed horribly. I tried overloading write by doing ostream& write( const char* s, streamsize n ) in my basic_stringstream2 class (I copied paste basic_stringstream into my cpp file and modified it) but the code kept using