[136] | 1 | /*
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| 2 | Print.cpp - Base class that provides print() and println()
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| 3 | Copyright (c) 2008 David A. Mellis. All right reserved.
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| 4 |
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| 5 | This library is free software; you can redistribute it and/or
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| 6 | modify it under the terms of the GNU Lesser General Public
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| 7 | License as published by the Free Software Foundation; either
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| 8 | version 2.1 of the License, or (at your option) any later version.
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| 9 |
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| 10 | This library is distributed in the hope that it will be useful,
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 13 | Lesser General Public License for more details.
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| 14 |
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| 15 | You should have received a copy of the GNU Lesser General Public
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| 16 | License along with this library; if not, write to the Free Software
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| 17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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| 18 |
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| 19 | Modified 23 November 2006 by David A. Mellis
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| 20 | */
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| 21 |
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| 22 | #include <stdlib.h>
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| 23 | #include <stdio.h>
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| 24 | #include <string.h>
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| 25 | #include <math.h>
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| 26 | #include "Arduino.h"
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| 27 | #include "Print.h"
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| 28 |
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| 29 | // Public Methods //////////////////////////////////////////////////////////////
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| 30 |
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| 31 | /* default implementation: may be overridden */
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| 32 | size_t Print::write(const uint8_t *buffer, size_t size)
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| 33 | {
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| 34 | size_t n = 0;
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| 35 | while (size--) {
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| 36 | n += write(*buffer++);
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| 37 | }
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| 38 | return n;
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| 39 | }
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| 40 |
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| 41 | size_t Print::print(const __FlashStringHelper *ifsh)
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| 42 | {
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| 43 | return print(reinterpret_cast<const char *>(ifsh));
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| 44 | }
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| 45 |
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| 46 | size_t Print::print(const String &s)
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| 47 | {
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| 48 | return write(s.c_str(), s.length());
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| 49 | }
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| 50 |
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| 51 | size_t Print::print(const char str[])
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| 52 | {
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| 53 | return write(str);
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| 54 | }
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| 55 |
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| 56 | size_t Print::print(char c)
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| 57 | {
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| 58 | return write(c);
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| 59 | }
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| 60 |
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| 61 | size_t Print::print(unsigned char b, int base)
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| 62 | {
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| 63 | return print((unsigned long) b, base);
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| 64 | }
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| 65 |
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| 66 | size_t Print::print(int n, int base)
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| 67 | {
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| 68 | return print((long) n, base);
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| 69 | }
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| 70 |
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| 71 | size_t Print::print(unsigned int n, int base)
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| 72 | {
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| 73 | return print((unsigned long) n, base);
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| 74 | }
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| 75 |
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| 76 | size_t Print::print(long n, int base)
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| 77 | {
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| 78 | if (base == 0) {
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| 79 | return write(n);
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| 80 | } else if (base == 10) {
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| 81 | if (n < 0) {
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| 82 | int t = print('-');
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| 83 | n = -n;
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| 84 | return printNumber(n, 10) + t;
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| 85 | }
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| 86 | return printNumber(n, 10);
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| 87 | } else {
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| 88 | return printNumber(n, base);
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| 89 | }
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| 90 | }
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| 91 |
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| 92 | size_t Print::print(unsigned long n, int base)
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| 93 | {
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| 94 | if (base == 0) return write(n);
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| 95 | else return printNumber(n, base);
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| 96 | }
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| 97 |
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| 98 | size_t Print::print(double n, int digits)
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| 99 | {
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| 100 | return printFloat(n, digits);
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| 101 | }
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| 102 |
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| 103 | size_t Print::println(const __FlashStringHelper *ifsh)
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| 104 | {
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| 105 | size_t n = print(ifsh);
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| 106 | n += println();
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| 107 | return n;
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| 108 | }
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| 109 |
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| 110 | size_t Print::print(const Printable& x)
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| 111 | {
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| 112 | return x.printTo(*this);
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| 113 | }
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| 114 |
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| 115 | size_t Print::println(void)
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| 116 | {
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| 117 | size_t n = print('\r');
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| 118 | n += print('\n');
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| 119 | return n;
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| 120 | }
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| 121 |
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| 122 | size_t Print::println(const String &s)
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| 123 | {
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| 124 | size_t n = print(s);
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| 125 | n += println();
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| 126 | return n;
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| 127 | }
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| 128 |
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| 129 | size_t Print::println(const char c[])
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| 130 | {
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| 131 | size_t n = print(c);
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| 132 | n += println();
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| 133 | return n;
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| 134 | }
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| 135 |
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| 136 | size_t Print::println(char c)
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| 137 | {
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| 138 | size_t n = print(c);
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| 139 | n += println();
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| 140 | return n;
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| 141 | }
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| 142 |
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| 143 | size_t Print::println(unsigned char b, int base)
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| 144 | {
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| 145 | size_t n = print(b, base);
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| 146 | n += println();
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| 147 | return n;
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| 148 | }
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| 149 |
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| 150 | size_t Print::println(int num, int base)
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| 151 | {
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| 152 | size_t n = print(num, base);
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| 153 | n += println();
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| 154 | return n;
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| 155 | }
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| 156 |
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| 157 | size_t Print::println(unsigned int num, int base)
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| 158 | {
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| 159 | size_t n = print(num, base);
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| 160 | n += println();
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| 161 | return n;
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| 162 | }
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| 163 |
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| 164 | size_t Print::println(long num, int base)
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| 165 | {
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| 166 | size_t n = print(num, base);
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| 167 | n += println();
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| 168 | return n;
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| 169 | }
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| 170 |
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| 171 | size_t Print::println(unsigned long num, int base)
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| 172 | {
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| 173 | size_t n = print(num, base);
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| 174 | n += println();
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| 175 | return n;
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| 176 | }
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| 177 |
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| 178 | size_t Print::println(double num, int digits)
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| 179 | {
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| 180 | size_t n = print(num, digits);
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| 181 | n += println();
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| 182 | return n;
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| 183 | }
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| 184 |
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| 185 | size_t Print::println(const Printable& x)
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| 186 | {
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| 187 | size_t n = print(x);
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| 188 | n += println();
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| 189 | return n;
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| 190 | }
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| 191 |
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| 192 | // Private Methods /////////////////////////////////////////////////////////////
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| 193 |
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| 194 | size_t Print::printNumber(unsigned long n, uint8_t base) {
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| 195 | char buf[8 * sizeof(long) + 1]; // Assumes 8-bit chars plus zero byte.
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| 196 | char *str = &buf[sizeof(buf) - 1];
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| 197 |
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| 198 | *str = '\0';
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| 199 |
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| 200 | // prevent crash if called with base == 1
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| 201 | if (base < 2) base = 10;
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| 202 |
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| 203 | do {
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| 204 | unsigned long m = n;
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| 205 | n /= base;
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| 206 | char c = m - base * n;
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| 207 | *--str = c < 10 ? c + '0' : c + 'A' - 10;
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| 208 | } while(n);
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| 209 |
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| 210 | return write(str);
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| 211 | }
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| 212 |
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| 213 | size_t Print::printFloat(double number, uint8_t digits)
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| 214 | {
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| 215 | size_t n = 0;
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| 216 |
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| 217 | if (isnan(number)) return print("nan");
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| 218 | if (isinf(number)) return print("inf");
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| 219 | if (number > 4294967040.0) return print ("ovf"); // constant determined empirically
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| 220 | if (number <-4294967040.0) return print ("ovf"); // constant determined empirically
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| 221 |
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| 222 | // Handle negative numbers
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| 223 | if (number < 0.0)
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| 224 | {
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| 225 | n += print('-');
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| 226 | number = -number;
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| 227 | }
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| 228 |
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| 229 | // Round correctly so that print(1.999, 2) prints as "2.00"
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| 230 | double rounding = 0.5;
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| 231 | for (uint8_t i=0; i<digits; ++i)
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| 232 | rounding /= 10.0;
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| 233 |
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| 234 | number += rounding;
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| 235 |
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| 236 | // Extract the integer part of the number and print it
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| 237 | unsigned long int_part = (unsigned long)number;
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| 238 | double remainder = number - (double)int_part;
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| 239 | n += print(int_part);
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| 240 |
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| 241 | // Print the decimal point, but only if there are digits beyond
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| 242 | if (digits > 0) {
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| 243 | n += print(".");
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| 244 | }
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| 245 |
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| 246 | // Extract digits from the remainder one at a time
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| 247 | while (digits-- > 0)
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| 248 | {
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| 249 | remainder *= 10.0;
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| 250 | int toPrint = int(remainder);
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| 251 | n += print(toPrint);
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| 252 | remainder -= toPrint;
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| 253 | }
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| 254 |
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| 255 | return n;
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| 256 | }
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