203 lines
3.5 KiB
C++
203 lines
3.5 KiB
C++
/*
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Print.cpp - Base class that provides print() and println()
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Copyright (c) 2008 David A. Mellis. All right reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Modified 23 November 2006 by David A. Mellis
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*/
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#include <stdio.h>
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#include <string.h>
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#include <inttypes.h>
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#include <math.h>
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#include "wiring.h"
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#include "Print.h"
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// Public Methods //////////////////////////////////////////////////////////////
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void Print::print(uint8_t b)
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{
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this->write(b);
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}
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void Print::print(char c)
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{
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print((byte) c);
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}
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void Print::print(const char c[])
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{
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while (*c)
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print(*c++);
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}
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void Print::print(int n)
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{
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print((long) n);
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}
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void Print::print(unsigned int n)
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{
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print((unsigned long) n);
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}
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void Print::print(long n)
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{
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if (n < 0) {
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print('-');
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n = -n;
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}
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printNumber(n, 10);
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}
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void Print::print(unsigned long n)
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{
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printNumber(n, 10);
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}
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void Print::print(long n, int base)
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{
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if (base == 0)
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print((char) n);
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else if (base == 10)
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print(n);
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else
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printNumber(n, base);
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}
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void Print::print(double n)
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{
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printFloat(n, 2);
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}
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void Print::println(void)
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{
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print('\r');
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print('\n');
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}
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void Print::println(char c)
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{
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print(c);
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println();
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}
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void Print::println(const char c[])
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{
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print(c);
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println();
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}
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void Print::println(uint8_t b)
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{
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print(b);
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println();
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}
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void Print::println(int n)
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{
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print(n);
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println();
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}
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void Print::println(unsigned int n)
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{
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print(n);
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println();
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}
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void Print::println(long n)
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{
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print(n);
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println();
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}
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void Print::println(unsigned long n)
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{
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print(n);
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println();
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}
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void Print::println(long n, int base)
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{
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print(n, base);
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println();
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}
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void Print::println(double n)
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{
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print(n);
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println();
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}
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// Private Methods /////////////////////////////////////////////////////////////
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void Print::printNumber(unsigned long n, uint8_t base)
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{
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unsigned char buf[8 * sizeof(long)]; // Assumes 8-bit chars.
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unsigned long i = 0;
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if (n == 0) {
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print('0');
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return;
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}
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while (n > 0) {
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buf[i++] = n % base;
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n /= base;
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}
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for (; i > 0; i--)
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print((char) (buf[i - 1] < 10 ?
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'0' + buf[i - 1] :
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'A' + buf[i - 1] - 10));
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}
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void Print::printFloat(double number, uint8_t digits)
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{
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// Handle negative numbers
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if (number < 0.0)
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{
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print('-');
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number = -number;
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}
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// Round correctly so that print(1.999, 2) prints as "2.00"
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double rounding = 0.5;
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for (uint8_t i=0; i<digits; ++i)
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rounding /= 10.0;
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number += rounding;
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// Extract the integer part of the number and print it
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unsigned long int_part = (unsigned long)number;
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double remainder = number - (double)int_part;
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print(int_part);
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// Print the decimal point, but only if there are digits beyond
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if (digits > 0)
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print(".");
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// Extract digits from the remainder one at a time
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while (digits-- > 0)
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{
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remainder *= 10.0;
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int toPrint = int(remainder);
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print(toPrint);
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remainder -= toPrint;
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}
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}
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