ITEAD STUDIO / ArduinoAPI

Arduino Core API Library besed on mbed platform.

Dependents:   WeeESP8266 ESP8266_moj

Print.cpp@1:2179048af332, 2015-02-06 (annotated)

Committer:
itead
Date:
Fri Feb 06 13:13:50 2015 +0000
Revision:
1:2179048af332
Parent:
0:5ebc917ebd09 
Change Print::write as public

Who changed what in which revision?

UserRevisionLine numberNew contents of line
itead 0:5ebc917ebd09 1 /*
itead 0:5ebc917ebd09 2 Print.cpp - Base class that provides print() and println()
itead 0:5ebc917ebd09 3 Copyright (c) 2008 David A. Mellis. All right reserved.
itead 0:5ebc917ebd09 4
itead 0:5ebc917ebd09 5 This library is free software; you can redistribute it and/or
itead 0:5ebc917ebd09 6 modify it under the terms of the GNU Lesser General Public
itead 0:5ebc917ebd09 7 License as published by the Free Software Foundation; either
itead 0:5ebc917ebd09 8 version 2.1 of the License, or (at your option) any later version.
itead 0:5ebc917ebd09 9
itead 0:5ebc917ebd09 10 This library is distributed in the hope that it will be useful,
itead 0:5ebc917ebd09 11 but WITHOUT ANY WARRANTY; without even the implied warranty of
itead 0:5ebc917ebd09 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
itead 0:5ebc917ebd09 13 Lesser General Public License for more details.
itead 0:5ebc917ebd09 14
itead 0:5ebc917ebd09 15 You should have received a copy of the GNU Lesser General Public
itead 0:5ebc917ebd09 16 License along with this library; if not, write to the Free Software
itead 0:5ebc917ebd09 17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
itead 0:5ebc917ebd09 18
itead 0:5ebc917ebd09 19 Modified 23 November 2006 by David A. Mellis
itead 0:5ebc917ebd09 20 */
itead 0:5ebc917ebd09 21
itead 0:5ebc917ebd09 22 #include <stdlib.h>
itead 0:5ebc917ebd09 23 #include <stdio.h>
itead 0:5ebc917ebd09 24 #include <string.h>
itead 0:5ebc917ebd09 25 #include <math.h>
itead 0:5ebc917ebd09 26
itead 0:5ebc917ebd09 27 #include "Print.h"
itead 0:5ebc917ebd09 28
itead 0:5ebc917ebd09 29 // Public Methods //////////////////////////////////////////////////////////////
itead 0:5ebc917ebd09 30
itead 0:5ebc917ebd09 31 /* default implementation: may be overridden */
itead 0:5ebc917ebd09 32 size_t Print::write(const uint8_t *buffer, size_t size)
itead 0:5ebc917ebd09 33 {
itead 0:5ebc917ebd09 34 size_t n = 0;
itead 0:5ebc917ebd09 35 while (size--) {
itead 0:5ebc917ebd09 36 n += write(*buffer++);
itead 0:5ebc917ebd09 37 }
itead 0:5ebc917ebd09 38 return n;
itead 0:5ebc917ebd09 39 }
itead 0:5ebc917ebd09 40
itead 0:5ebc917ebd09 41
itead 0:5ebc917ebd09 42 size_t Print::print(const String &s)
itead 0:5ebc917ebd09 43 {
itead 0:5ebc917ebd09 44 size_t n = 0;
itead 0:5ebc917ebd09 45 for (uint16_t i = 0; i < s.length(); i++) {
itead 0:5ebc917ebd09 46 n += write(s[i]);
itead 0:5ebc917ebd09 47 }
itead 0:5ebc917ebd09 48 return n;
itead 0:5ebc917ebd09 49 }
itead 0:5ebc917ebd09 50
itead 0:5ebc917ebd09 51 size_t Print::print(const char str[])
itead 0:5ebc917ebd09 52 {
itead 0:5ebc917ebd09 53 return write(str);
itead 0:5ebc917ebd09 54 }
itead 0:5ebc917ebd09 55
itead 0:5ebc917ebd09 56 size_t Print::print(char c)
itead 0:5ebc917ebd09 57 {
itead 0:5ebc917ebd09 58 return write(c);
itead 0:5ebc917ebd09 59 }
itead 0:5ebc917ebd09 60
itead 0:5ebc917ebd09 61 size_t Print::print(unsigned char b, int base)
itead 0:5ebc917ebd09 62 {
itead 0:5ebc917ebd09 63 return print((unsigned long) b, base);
itead 0:5ebc917ebd09 64 }
itead 0:5ebc917ebd09 65
itead 0:5ebc917ebd09 66 size_t Print::print(int n, int base)
itead 0:5ebc917ebd09 67 {
itead 0:5ebc917ebd09 68 return print((long) n, base);
itead 0:5ebc917ebd09 69 }
itead 0:5ebc917ebd09 70
itead 0:5ebc917ebd09 71 size_t Print::print(unsigned int n, int base)
itead 0:5ebc917ebd09 72 {
itead 0:5ebc917ebd09 73 return print((unsigned long) n, base);
itead 0:5ebc917ebd09 74 }
itead 0:5ebc917ebd09 75
itead 0:5ebc917ebd09 76 size_t Print::print(long n, int base)
itead 0:5ebc917ebd09 77 {
itead 0:5ebc917ebd09 78 if (base == 0) {
itead 0:5ebc917ebd09 79 return write(n);
itead 0:5ebc917ebd09 80 } else if (base == 10) {
itead 0:5ebc917ebd09 81 if (n < 0) {
itead 0:5ebc917ebd09 82 int t = print('-');
itead 0:5ebc917ebd09 83 n = -n;
itead 0:5ebc917ebd09 84 return printNumber(n, 10) + t;
itead 0:5ebc917ebd09 85 }
itead 0:5ebc917ebd09 86 return printNumber(n, 10);
itead 0:5ebc917ebd09 87 } else {
itead 0:5ebc917ebd09 88 return printNumber(n, base);
itead 0:5ebc917ebd09 89 }
itead 0:5ebc917ebd09 90 }
itead 0:5ebc917ebd09 91
itead 0:5ebc917ebd09 92 size_t Print::print(unsigned long n, int base)
itead 0:5ebc917ebd09 93 {
itead 0:5ebc917ebd09 94 if (base == 0) return write(n);
itead 0:5ebc917ebd09 95 else return printNumber(n, base);
itead 0:5ebc917ebd09 96 }
itead 0:5ebc917ebd09 97
itead 0:5ebc917ebd09 98 size_t Print::print(double n, int digits)
itead 0:5ebc917ebd09 99 {
itead 0:5ebc917ebd09 100 return printFloat(n, digits);
itead 0:5ebc917ebd09 101 }
itead 0:5ebc917ebd09 102
itead 0:5ebc917ebd09 103 size_t Print::println(void)
itead 0:5ebc917ebd09 104 {
itead 0:5ebc917ebd09 105 size_t n = print('\r');
itead 0:5ebc917ebd09 106 n += print('\n');
itead 0:5ebc917ebd09 107 return n;
itead 0:5ebc917ebd09 108 }
itead 0:5ebc917ebd09 109
itead 0:5ebc917ebd09 110 size_t Print::println(const String &s)
itead 0:5ebc917ebd09 111 {
itead 0:5ebc917ebd09 112 size_t n = print(s);
itead 0:5ebc917ebd09 113 n += println();
itead 0:5ebc917ebd09 114 return n;
itead 0:5ebc917ebd09 115 }
itead 0:5ebc917ebd09 116
itead 0:5ebc917ebd09 117 size_t Print::println(const char c[])
itead 0:5ebc917ebd09 118 {
itead 0:5ebc917ebd09 119 size_t n = print(c);
itead 0:5ebc917ebd09 120 n += println();
itead 0:5ebc917ebd09 121 return n;
itead 0:5ebc917ebd09 122 }
itead 0:5ebc917ebd09 123
itead 0:5ebc917ebd09 124 size_t Print::println(char c)
itead 0:5ebc917ebd09 125 {
itead 0:5ebc917ebd09 126 size_t n = print(c);
itead 0:5ebc917ebd09 127 n += println();
itead 0:5ebc917ebd09 128 return n;
itead 0:5ebc917ebd09 129 }
itead 0:5ebc917ebd09 130
itead 0:5ebc917ebd09 131 size_t Print::println(unsigned char b, int base)
itead 0:5ebc917ebd09 132 {
itead 0:5ebc917ebd09 133 size_t n = print(b, base);
itead 0:5ebc917ebd09 134 n += println();
itead 0:5ebc917ebd09 135 return n;
itead 0:5ebc917ebd09 136 }
itead 0:5ebc917ebd09 137
itead 0:5ebc917ebd09 138 size_t Print::println(int num, int base)
itead 0:5ebc917ebd09 139 {
itead 0:5ebc917ebd09 140 size_t n = print(num, base);
itead 0:5ebc917ebd09 141 n += println();
itead 0:5ebc917ebd09 142 return n;
itead 0:5ebc917ebd09 143 }
itead 0:5ebc917ebd09 144
itead 0:5ebc917ebd09 145 size_t Print::println(unsigned int num, int base)
itead 0:5ebc917ebd09 146 {
itead 0:5ebc917ebd09 147 size_t n = print(num, base);
itead 0:5ebc917ebd09 148 n += println();
itead 0:5ebc917ebd09 149 return n;
itead 0:5ebc917ebd09 150 }
itead 0:5ebc917ebd09 151
itead 0:5ebc917ebd09 152 size_t Print::println(long num, int base)
itead 0:5ebc917ebd09 153 {
itead 0:5ebc917ebd09 154 size_t n = print(num, base);
itead 0:5ebc917ebd09 155 n += println();
itead 0:5ebc917ebd09 156 return n;
itead 0:5ebc917ebd09 157 }
itead 0:5ebc917ebd09 158
itead 0:5ebc917ebd09 159 size_t Print::println(unsigned long num, int base)
itead 0:5ebc917ebd09 160 {
itead 0:5ebc917ebd09 161 size_t n = print(num, base);
itead 0:5ebc917ebd09 162 n += println();
itead 0:5ebc917ebd09 163 return n;
itead 0:5ebc917ebd09 164 }
itead 0:5ebc917ebd09 165
itead 0:5ebc917ebd09 166 size_t Print::println(double num, int digits)
itead 0:5ebc917ebd09 167 {
itead 0:5ebc917ebd09 168 size_t n = print(num, digits);
itead 0:5ebc917ebd09 169 n += println();
itead 0:5ebc917ebd09 170 return n;
itead 0:5ebc917ebd09 171 }
itead 0:5ebc917ebd09 172
itead 0:5ebc917ebd09 173 // Private Methods /////////////////////////////////////////////////////////////
itead 0:5ebc917ebd09 174
itead 0:5ebc917ebd09 175 size_t Print::printNumber(unsigned long n, uint8_t base) {
itead 0:5ebc917ebd09 176 char buf[8 * sizeof(long) + 1]; // Assumes 8-bit chars plus zero byte.
itead 0:5ebc917ebd09 177 char *str = &buf[sizeof(buf) - 1];
itead 0:5ebc917ebd09 178
itead 0:5ebc917ebd09 179 *str = '\0';
itead 0:5ebc917ebd09 180
itead 0:5ebc917ebd09 181 // prevent crash if called with base == 1
itead 0:5ebc917ebd09 182 if (base < 2) base = 10;
itead 0:5ebc917ebd09 183
itead 0:5ebc917ebd09 184 do {
itead 0:5ebc917ebd09 185 unsigned long m = n;
itead 0:5ebc917ebd09 186 n /= base;
itead 0:5ebc917ebd09 187 char c = m - base * n;
itead 0:5ebc917ebd09 188 *--str = c < 10 ? c + '0' : c + 'A' - 10;
itead 0:5ebc917ebd09 189 } while(n);
itead 0:5ebc917ebd09 190
itead 0:5ebc917ebd09 191 return write(str);
itead 0:5ebc917ebd09 192 }
itead 0:5ebc917ebd09 193
itead 0:5ebc917ebd09 194 size_t Print::printFloat(double number, uint8_t digits)
itead 0:5ebc917ebd09 195 {
itead 0:5ebc917ebd09 196 size_t n = 0;
itead 0:5ebc917ebd09 197
itead 0:5ebc917ebd09 198 if (isnan(number)) return print("nan");
itead 0:5ebc917ebd09 199 if (isinf(number)) return print("inf");
itead 0:5ebc917ebd09 200 if (number > 4294967040.0) return print ("ovf"); // constant determined empirically
itead 0:5ebc917ebd09 201 if (number <-4294967040.0) return print ("ovf"); // constant determined empirically
itead 0:5ebc917ebd09 202
itead 0:5ebc917ebd09 203 // Handle negative numbers
itead 0:5ebc917ebd09 204 if (number < 0.0)
itead 0:5ebc917ebd09 205 {
itead 0:5ebc917ebd09 206 n += print('-');
itead 0:5ebc917ebd09 207 number = -number;
itead 0:5ebc917ebd09 208 }
itead 0:5ebc917ebd09 209
itead 0:5ebc917ebd09 210 // Round correctly so that print(1.999, 2) prints as "2.00"
itead 0:5ebc917ebd09 211 double rounding = 0.5;
itead 0:5ebc917ebd09 212 for (uint8_t i=0; i<digits; ++i)
itead 0:5ebc917ebd09 213 rounding /= 10.0;
itead 0:5ebc917ebd09 214
itead 0:5ebc917ebd09 215 number += rounding;
itead 0:5ebc917ebd09 216
itead 0:5ebc917ebd09 217 // Extract the integer part of the number and print it
itead 0:5ebc917ebd09 218 unsigned long int_part = (unsigned long)number;
itead 0:5ebc917ebd09 219 double remainder = number - (double)int_part;
itead 0:5ebc917ebd09 220 n += print(int_part);
itead 0:5ebc917ebd09 221
itead 0:5ebc917ebd09 222 // Print the decimal point, but only if there are digits beyond
itead 0:5ebc917ebd09 223 if (digits > 0) {
itead 0:5ebc917ebd09 224 n += print(".");
itead 0:5ebc917ebd09 225 }
itead 0:5ebc917ebd09 226
itead 0:5ebc917ebd09 227 // Extract digits from the remainder one at a time
itead 0:5ebc917ebd09 228 while (digits-- > 0)
itead 0:5ebc917ebd09 229 {
itead 0:5ebc917ebd09 230 remainder *= 10.0;
itead 0:5ebc917ebd09 231 int toPrint = int(remainder);
itead 0:5ebc917ebd09 232 n += print(toPrint);
itead 0:5ebc917ebd09 233 remainder -= toPrint;
itead 0:5ebc917ebd09 234 }
itead 0:5ebc917ebd09 235
itead 0:5ebc917ebd09 236 return n;
itead 0:5ebc917ebd09 237 }