Binary Memory Stream

BinaryMemoryStreamExample.cpp

// from  https://cplusplus.com/forum/general/226786/

#include <istream>
#include <ostream>
#include <streambuf>

struct IMemBuf: std::streambuf
{
	IMemBuf(const char* base, size_t size)
	{
		char* p(const_cast<char*>(base));
		this->setg(p, p, p + size);
	}
};

struct IMemStream: virtual IMemBuf, std::istream
{
	IMemStream(const char* mem, size_t size) :
		IMemBuf(mem, size),
		std::istream(static_cast<std::streambuf*>(this))
	{
	}
};

struct OMemBuf: std::streambuf
{
	OMemBuf(char* base, size_t size)
	{
		this->setp(base, base + size);
	}
};

struct OMemStream: virtual OMemBuf, std::ostream
{
	OMemStream(char* base, size_t size) :
		OMemBuf(mem, size),
		std::ostream(static_cast<std::streambuf*>(this))
	{
	}
};