Adding support for printing Strings to the Print class.

cores/arduino/HardwareSerial.cpp

@@ -19,6 +19,7 @@
   Modified 23 November 2006 by David A. Mellis
 */
 
+#include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include <inttypes.h>

cores/arduino/Print.cpp

@@ -19,6 +19,7 @@
  Modified 23 November 2006 by David A. Mellis
  */
 
+#include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include <math.h>
@@ -42,6 +43,11 @@ void Print::write(const uint8_t *buffer, size_t size)
     write(*buffer++);
 }
 
+void Print::print(const String &s)
+{
+  print(s.toCharArray());
+}
+
 void Print::print(const char str[])
 {
   write(str);
@@ -99,6 +105,12 @@ void Print::println(void)
   print('\n');  
 }
 
+void Print::println(const String &s)
+{
+  print(s);
+  println();
+}
+
 void Print::println(const char c[])
 {
   print(c);

cores/arduino/Print.h

@@ -23,6 +23,8 @@
 #include <inttypes.h>
 #include <stdio.h> // for size_t
 
+#include "WString.h"
+
 #define DEC 10
 #define HEX 16
 #define OCT 8
@@ -38,7 +40,8 @@ class Print
     virtual void write(uint8_t) = 0;
     virtual void write(const char *str);
     virtual void write(const uint8_t *buffer, size_t size);
-
+    
+    void print(const String &);
     void print(const char[]);
     void print(char, int = BYTE);
     void print(unsigned char, int = BYTE);
@@ -48,6 +51,7 @@ class Print
     void print(unsigned long, int = DEC);
     void print(double, int = 2);
 
+    void println(const String &s);
     void println(const char[]);
     void println(char, int = BYTE);
     void println(unsigned char, int = BYTE);

cores/arduino/WString.h

@@ -20,7 +20,8 @@
 #ifndef String_h
 #define String_h
 
-#include "WProgram.h"
+//#include "WProgram.h"
+#include <stdlib.h>
 #include <string.h>
 #include <ctype.h>