Extend Print class for 64bit integers.

Author: dok-net

cores/arduino/Print.cpp

@@ -86,18 +86,12 @@ size_t Print::print(unsigned int n, int base)
 
 size_t Print::print(long n, int base)
 {
-  if (base == 0) {
-    return write(n);
-  } else if (base == 10) {
-    if (n < 0) {
-      int t = print('-');
-      n = -n;
-      return printNumber(n, 10) + t;
-    }
-    return printNumber(n, 10);
-  } else {
-    return printNumber(n, base);
+  int t = 0;
+  if (base == 10 && n < 0) {
+    t = print('-');
+    n = -n;
   }
+  return printNumber(static_cast<unsigned long>(n), base) + t;
 }
 
 size_t Print::print(unsigned long n, int base)
@@ -106,6 +100,22 @@ size_t Print::print(unsigned long n, int base)
   else return printNumber(n, base);
 }
 
+size_t Print::print(long long n, int base)
+{
+  int t = 0;
+  if (base == 10 && n < 0) {
+    t = print('-');
+    n = -n;
+  }
+  return printNumber(static_cast<unsigned long long>(n), base) + t;
+}
+
+size_t Print::print(unsigned long long n, int base)
+{
+  if (base == 0) return write(n);
+  return printNumber(n, base);
+}
+
 size_t Print::print(double n, int digits)
 {
   return printFloat(n, digits);
@@ -184,6 +194,20 @@ size_t Print::println(unsigned long num, int base)
   return n;
 }
 
+size_t Print::println(long long num, int base)
+{
+  size_t n = print(num, base);
+  n += println();
+  return n;
+}
+
+size_t Print::println(unsigned long long num, int base)
+{
+  size_t n = print(num, base);
+  n += println();
+  return n;
+}
+
 size_t Print::println(double num, int digits)
 {
   size_t n = print(num, digits);
@@ -220,6 +244,27 @@ size_t Print::printNumber(unsigned long n, uint8_t base)
   return write(str);
 }
 
+size_t Print::printNumber(unsigned long long n, uint8_t base)
+{
+  char buf[8 * sizeof(long long) + 1]; // Assumes 8-bit chars plus zero byte.
+  char* str = &buf[sizeof(buf) - 1];
+
+  *str = '\0';
+
+  // prevent crash if called with base == 1
+  if (base < 2) base = 10;
+
+  do {
+    unsigned long m = n;
+    n /= base;
+    char c = m - base * n;
+
+    *--str = c < 10 ? c + '0' : c + 'A' - 10;
+  } while(n);
+
+  return write(str);
+}
+
 size_t Print::printFloat(double number, uint8_t digits) 
 { 
   size_t n = 0;

cores/arduino/Print.h

@@ -36,58 +36,63 @@
 
 class Print
 {
-  private:
-    int write_error;
-    size_t printNumber(unsigned long, uint8_t);
-    size_t printFloat(double, uint8_t);
-  protected:
+    private:
+        int write_error;
+        size_t printNumber(unsigned long, uint8_t);
+        size_t printNumber(unsigned long long, uint8_t);
+        size_t printFloat(double, uint8_t);
+    protected:
     void setWriteError(int err = 1) { write_error = err; }
-  public:
+    public:
     Print() : write_error(0) {}
-  
+
     int getWriteError() { return write_error; }
     void clearWriteError() { setWriteError(0); }
-  
-    virtual size_t write(uint8_t) = 0;
-    size_t write(const char *str) {
+
+        virtual size_t write(uint8_t) = 0;
+        size_t write(const char *str) {
       if (str == NULL) return 0;
       return write((const uint8_t *)str, strlen(str));
-    }
-    virtual size_t write(const uint8_t *buffer, size_t size);
-    size_t write(const char *buffer, size_t size) {
-      return write((const uint8_t *)buffer, size);
-    }
+        }
+        virtual size_t write(const uint8_t *buffer, size_t size);
+        size_t write(const char *buffer, size_t size) {
+            return write((const uint8_t *) buffer, size);
+        }
 
     // default to zero, meaning "a single write may block"
     // should be overriden by subclasses with buffering
     virtual int availableForWrite() { return 0; }
 
-    size_t print(const __FlashStringHelper *);
-    size_t print(const String &);
-    size_t print(const char[]);
-    size_t print(char);
-    size_t print(unsigned char, int = DEC);
-    size_t print(int, int = DEC);
-    size_t print(unsigned int, int = DEC);
-    size_t print(long, int = DEC);
-    size_t print(unsigned long, int = DEC);
-    size_t print(double, int = 2);
-    size_t print(const Printable&);
+        size_t print(const __FlashStringHelper *);
+        size_t print(const String &);
+        size_t print(const char[]);
+        size_t print(char);
+        size_t print(unsigned char, int = DEC);
+        size_t print(int, int = DEC);
+        size_t print(unsigned int, int = DEC);
+        size_t print(long, int = DEC);
+        size_t print(unsigned long, int = DEC);
+        size_t print(long long, int = DEC);
+        size_t print(unsigned long long, int = DEC);
+        size_t print(double, int = 2);
+        size_t print(const Printable&);
 
-    size_t println(const __FlashStringHelper *);
-    size_t println(const String &s);
-    size_t println(const char[]);
-    size_t println(char);
-    size_t println(unsigned char, int = DEC);
-    size_t println(int, int = DEC);
-    size_t println(unsigned int, int = DEC);
-    size_t println(long, int = DEC);
-    size_t println(unsigned long, int = DEC);
-    size_t println(double, int = 2);
-    size_t println(const Printable&);
-    size_t println(void);
+        size_t println(const __FlashStringHelper *);
+        size_t println(const String &s);
+        size_t println(const char[]);
+        size_t println(char);
+        size_t println(unsigned char, int = DEC);
+        size_t println(int, int = DEC);
+        size_t println(unsigned int, int = DEC);
+        size_t println(long, int = DEC);
+        size_t println(unsigned long, int = DEC);
+        size_t println(long long, int = DEC);
+        size_t println(unsigned long long, int = DEC);
+        size_t println(double, int = 2);
+        size_t println(const Printable&);
+        size_t println(void);
 
-    virtual void flush() { /* Empty implementation for backward compatibility */ }
+        virtual void flush() { /* Empty implementation for backward compatibility */ }
 };
 
 #endif