Extend Print class for 64bit integers.

cores/esp8266/Print.cpp

@@ -146,24 +146,34 @@ 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('-');
+    int t = 0;
+    if (base == 10 && n < 0) {
+        t = print('-');
         n = -n;
-            return printNumber(n, 10) + t;
-        }
-        return printNumber(n, 10);
-    } else {
-        return printNumber(n, base);
     }
+    return printNumber(static_cast<unsigned long>(n), base) + t;
 }
 
 size_t Print::print(unsigned long n, int base) {
-    if(base == 0)
+    if (base == 0) {
         return write(n);
-    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);
 }
 
@@ -233,6 +243,18 @@ 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);
     n += println();
@@ -258,9 +280,29 @@ size_t Print::printNumber(unsigned long n, uint8_t base) {
         base = 10;
 
     do {
-        unsigned long m = n;
+        char c = n % base;
         n /= base;
-        char c = m - base * n;
+
+        *--str = c < 10 ? c + '0' : c + 'A' - 10;
+    } while(n);
+
+    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 {
+        char c = n % base;
+        n /= base;
+
         *--str = c < 10 ? c + '0' : c + 'A' - 10;
     } while(n);
 

cores/esp8266/Print.h

@@ -37,6 +37,7 @@ class Print {
     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) {
@@ -71,6 +72,8 @@ class Print {
         inline size_t write(unsigned int t) { return write((uint8_t)t); }
         inline size_t write(long t) { return write((uint8_t)t); }
         inline size_t write(unsigned long t) { return write((uint8_t)t); }
+        inline size_t write(long long t) { return write((uint8_t)t); }
+        inline size_t write(unsigned long long t) { return write((uint8_t)t); }
         // Enable write(char) to fall through to write(uint8_t)
         inline size_t write(char c) { return write((uint8_t) c); }
         inline size_t write(int8_t c) { return write((uint8_t) c); }
@@ -86,6 +89,8 @@ class Print {
         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&);
 
@@ -98,6 +103,8 @@ class Print {
         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);