Using std::hash with char* as a C string rather than a pointer.

gistfile1.cpp

namespace std
{
	template <>
	struct hash<char *>
	{
		size_t operator()(const char *s) const
		{
			// http://www.cse.yorku.ca/~oz/hash.html
			size_t h = 5381;
			int c;
			while ((c = *s++))
				h = ((h << 5) + h) + c;
			return h;
		}
	};
}