Add support for serial gateway to Rpi

drivers/Linux/Print.cpp

@@ -0,0 +1,238 @@
+/*
+ Print.cpp - Base class that provides print() and println()
+ Copyright (c) 2008 David A. Mellis.  All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+ Modified 23 November 2006 by David A. Mellis
+ Modified December 2014 by Ivan Grokhotkov
+ Modified May 2015 by Michael C. Miller - esp8266 progmem support
+ Modified August 2016 by Marcelo Aquino <marceloaqno@gmail.org> for MySensors use
+ */
+
+#include <cstdlib>
+#include <cstdio>
+#include <cstdarg>
+#include <cmath>
+#include "Print.h"
+
+// Public Methods //////////////////////////////////////////////////////////////
+
+size_t Print::write(const uint8_t *buffer, size_t size) {
+	size_t n = 0;
+	while(size--) {
+		n += write(*buffer++);
+	}
+	return n;
+}
+
+size_t Print::printf(const char *format, ...) {
+	va_list arg;
+	va_start(arg, format);
+	char temp[64];
+	char* buffer = temp;
+	size_t len = vsnprintf(temp, sizeof(temp), format, arg);
+	va_end(arg);
+	if (len > sizeof(temp) - 1) {
+		buffer = new char[len + 1];
+		if (!buffer) {
+			return 0;
+		}
+		va_start(arg, format);
+		vsnprintf(buffer, len + 1, format, arg);
+		va_end(arg);
+	}
+	len = write((const uint8_t*) buffer, len);
+	if (buffer != temp) {
+		delete[] buffer;
+	}
+	return len;
+}
+
+size_t Print::print(const std::string &s) {
+	return write(s.c_str(), s.length());
+}
+
+size_t Print::print(const char str[]) {
+	return write(str);
+}
+
+size_t Print::print(char c) {
+	return write(c);
+}
+
+size_t Print::print(unsigned char b, int base) {
+	return print((unsigned long) b, base);
+}
+
+size_t Print::print(int n, int base) {
+	return print((long) n, base);
+}
+
+size_t Print::print(unsigned int n, int base) {
+	return print((unsigned long) n, 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);
+	}
+}
+
+size_t Print::print(unsigned long n, int base) {
+	if(base == 0)
+		return write(n);
+	else
+		return printNumber(n, base);
+}
+
+size_t Print::print(double n, int digits) {
+	return printFloat(n, digits);
+}
+
+size_t Print::println(void) {
+	return print("\r\n");
+}
+
+size_t Print::println(const std::string &s) {
+	size_t n = print(s);
+	n += println();
+	return n;
+}
+
+size_t Print::println(const char c[]) {
+	size_t n = print(c);
+	n += println();
+	return n;
+}
+
+size_t Print::println(char c) {
+	size_t n = print(c);
+	n += println();
+	return n;
+}
+
+size_t Print::println(unsigned char b, int base) {
+	size_t n = print(b, base);
+	n += println();
+	return n;
+}
+
+size_t Print::println(int num, int base) {
+	size_t n = print(num, base);
+	n += println();
+	return n;
+}
+
+size_t Print::println(unsigned int num, int base) {
+	size_t n = print(num, base);
+	n += println();
+	return n;
+}
+
+size_t Print::println(long num, int base) {
+	size_t n = print(num, base);
+	n += println();
+	return n;
+}
+
+size_t Print::println(unsigned 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();
+	return n;
+}
+
+// Private Methods /////////////////////////////////////////////////////////////
+
+size_t Print::printNumber(unsigned long n, uint8_t base) {
+	char buf[8 * sizeof(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;
+
+	if(std::isnan(number))
+		return print("nan");
+	if(std::isinf(number))
+		return print("inf");
+	if(number > 4294967040.0)
+		return print("ovf");  // constant determined empirically
+	if(number < -4294967040.0)
+		return print("ovf");  // constant determined empirically
+
+	// Handle negative numbers
+	if(number < 0.0) {
+		n += print('-');
+		number = -number;
+	}
+
+	// Round correctly so that print(1.999, 2) prints as "2.00"
+	double rounding = 0.5;
+	for(uint8_t i = 0; i < digits; ++i)
+		rounding /= 10.0;
+
+	number += rounding;
+
+	// Extract the integer part of the number and print it
+	unsigned long int_part = (unsigned long) number;
+	double remainder = number - (double) int_part;
+	n += print(int_part);
+
+	// Print the decimal point, but only if there are digits beyond
+	if(digits > 0) {
+		n += print(".");
+	}
+
+	// Extract digits from the remainder one at a time
+	while(digits-- > 0) {
+		remainder *= 10.0;
+		int toPrint = int(remainder);
+		n += print(toPrint);
+		remainder -= toPrint;
+	}
+
+	return n;
+}