outputstream: Add << for float and double

include/object/outputstream.h

@@ -35,6 +35,8 @@ class OutputStream {
 	OutputStream & operator<<(long long number);
 	OutputStream & operator<<(void *pointer);
 	OutputStream & operator<<(const char *text);
+	OutputStream & operator<<(float number);
+	OutputStream & operator<<(double number);
 	OutputStream & operator<<(OutputStream & (*fun) (OutputStream &));
 
 	void setBase(uint8_t b);

src/os/object/outputstream.cc

@@ -98,6 +98,18 @@ OutputStream & OutputStream::operator<<(long long number)
 	return *this;
 }
 
+OutputStream & OutputStream::operator<<(double number)
+{
+	*this << (float)number;
+	return *this;
+}
+
+OutputStream & OutputStream::operator<<(float number)
+{
+	this->printf_float(number);
+	return *this;
+}
+
 OutputStream & OutputStream::operator<<(void *pointer)
 {
 	unsigned short temp_base = base;