Method write_string

lib/pugixml/src/pugixml.cpp:3782–3805

		}

		void write_string(const char_t* data)
		{
			// write the part of the string that fits in the buffer
			size_t offset = bufsize;

			while (*data && offset < bufcapacity)
				buffer[offset++] = *data++;

			// write the rest
			if (offset < bufcapacity)
			{
				bufsize = offset;
			}
			else
			{
				// backtrack a bit if we have split the codepoint
				size_t length = offset - bufsize;
				size_t extra = length - get_valid_length(data - length, length);

				bufsize = offset - extra;

				write_direct(data - extra, strlength(data) + extra);
			}
		}

		void write(char_t d0)
		{