HAL_Empty: implement a dummy buffered write

libraries/AP_HAL_Empty/Console.cpp

@@ -40,3 +40,12 @@ size_t EmptyConsoleDriver::write(uint8_t c) {
     return _d->write(c);
 }
 
+
+size_t EmptyConsoleDriver::write(const uint8_t *buffer, size_t size)
+{
+    size_t n = 0;
+    while (size--) {
+        n += write(*buffer++);
+    }
+    return n;
+}

libraries/AP_HAL_Empty/Console.h

@@ -18,6 +18,7 @@ public:
     int16_t read();
 
     size_t write(uint8_t c);
+    size_t write(const uint8_t *buffer, size_t size);
 private:
     AP_HAL::BetterStream *_d;
 };

libraries/AP_HAL_Empty/UARTDriver.cpp

@@ -20,3 +20,12 @@ int16_t EmptyUARTDriver::read() { return -1; }
 
 /* Empty implementations of Print virtual methods */
 size_t EmptyUARTDriver::write(uint8_t c) { return 0; }
+
+size_t EmptyUARTDriver::write(const uint8_t *buffer, size_t size)
+{
+    size_t n = 0;
+    while (size--) {
+        n += write(*buffer++);
+    }
+    return n;
+}

libraries/AP_HAL_Empty/UARTDriver.h

@@ -23,6 +23,7 @@ public:
 
     /* Empty implementations of Print virtual methods */
     size_t write(uint8_t c);
+    size_t write(const uint8_t *buffer, size_t size);
 };
 
 #endif // __AP_HAL_EMPTY_UARTDRIVER_H__