Handout

libsys/iostream.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#include "outputstream.h"
+#include "stub.h"
+
+class IOStream : public OutputStream {
+   private:
+	IOStream(IOStream &copy);  // no copy
+	int fd;
+
+   public:
+	explicit IOStream(int sysfd = 0) : fd(sysfd) {}
+
+	~IOStream() {
+		if (pos > 0) {
+			sys_write(fd, buffer, pos);
+		}
+	}
+
+	void flush() override {
+		sys_write(fd, buffer, pos);
+		pos = 0;
+	}
+};