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/*
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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 <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <math.h>
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#include "Arduino.h"
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#include "Print.h"
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// Public Methods //////////////////////////////////////////////////////////////
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/* default implementation: may be overridden */
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size_t Print::write(const uint8_t *buffer, size_t size)
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{
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  size_t n = 0;
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  while (size--) {
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    n += write(*buffer++);
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  }
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  return n;
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}
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size_t Print::print(const __FlashStringHelper *ifsh)
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{
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  const prog_char *p = (const prog_char *)ifsh;
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  size_t n = 0;
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  while (1) {
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    unsigned char c = pgm_read_byte(p++);
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    if (c == 0) break;
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    n += write(c);
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  }
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  return n;
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}
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size_t Print::print(const String &s)
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{
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  size_t n = 0;
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  for (uint16_t i = 0; i < s.length(); i++) {
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    n += write(s[i]);
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  }
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  return n;
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}
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size_t Print::print(const char str[])
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{
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  return write(str);
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}
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size_t Print::print(char c)
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{
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  return write(c);
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}
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size_t Print::print(unsigned char b, int base)
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{
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  return print((unsigned long) b, base);
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}
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size_t Print::print(int n, int base)
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{
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  return print((long) n, base);
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}
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size_t Print::print(unsigned int n, int base)
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{
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  return print((unsigned long) n, base);
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}
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size_t Print::print(long n, int base)
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{
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  if (base == 0) {
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    return write(n);
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  } else if (base == 10) {
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    if (n < 0) {
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      int t = print('-');
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      n = -n;
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      return printNumber(n, 10) + t;
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    }
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    return printNumber(n, 10);
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  } else {
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    return printNumber(n, base);
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  }
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}
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size_t Print::print(unsigned long n, int base)
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{
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  if (base == 0) return write(n);
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  else return printNumber(n, base);
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}
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size_t Print::print(double n, int digits)
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{
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  return printFloat(n, digits);
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}
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size_t Print::println(const __FlashStringHelper *ifsh)
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{
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  size_t n = print(ifsh);
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  n += println();
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  return n;
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}
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size_t Print::print(const Printable& x)
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{
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  return x.printTo(*this);
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}
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size_t Print::println(void)
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{
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  size_t n = print('\r');
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  n += print('\n');
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  return n;
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}
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size_t Print::println(const String &s)
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{
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  size_t n = print(s);
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  n += println();
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  return n;
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}
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size_t Print::println(const char c[])
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{
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  size_t n = print(c);
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  n += println();
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  return n;
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}
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size_t Print::println(char c)
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{
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  size_t n = print(c);
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  n += println();
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  return n;
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}
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size_t Print::println(unsigned char b, int base)
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{
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  size_t n = print(b, base);
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  n += println();
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  return n;
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}
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size_t Print::println(int num, int base)
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{
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  size_t n = print(num, base);
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  n += println();
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  return n;
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}
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size_t Print::println(unsigned int num, int base)
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{
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  size_t n = print(num, base);
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  n += println();
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  return n;
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}
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size_t Print::println(long num, int base)
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{
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  size_t n = print(num, base);
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  n += println();
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  return n;
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}
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size_t Print::println(unsigned long num, int base)
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{
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  size_t n = print(num, base);
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  n += println();
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  return n;
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}
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size_t Print::println(double num, int digits)
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{
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  size_t n = print(num, digits);
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  n += println();
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  return n;
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}
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size_t Print::println(const Printable& x)
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{
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  size_t n = print(x);
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  n += println();
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  return n;
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}
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// Private Methods /////////////////////////////////////////////////////////////
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size_t Print::printNumber(unsigned long n, uint8_t base) {
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  char buf[8 * sizeof(long) + 1]; // Assumes 8-bit chars plus zero byte.
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  char *str = &buf[sizeof(buf) - 1];
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  *str = '\0';
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  // prevent crash if called with base == 1
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  if (base < 2) base = 10;
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  do {
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    unsigned long m = n;
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    n /= base;
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    char c = m - base * n;
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    *--str = c < 10 ? c + '0' : c + 'A' - 10;
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  } while(n);
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  return write(str);
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}
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size_t Print::printFloat(double number, uint8_t digits) 
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{ 
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  size_t n = 0;
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  // Handle negative numbers
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  if (number < 0.0)
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  {
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     n += 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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  n += 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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    n += print("."); 
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  }
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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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    n += print(toPrint);
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    remainder -= toPrint; 
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  } 
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  return n;
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}