pengfei wu / Mbed 2 deprecated ESP8266Program

For test

Dependencies:   mbed

Print.cpp@35:90be2bc2a492, 2015-02-05 (annotated)

Committer:
shennongmin
Date:
Thu Feb 05 06:48:45 2015 +0000
Revision:
35:90be2bc2a492
Parent:
24:b5ba3e321e34 
compile okay and test okay

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shennongmin 10:9d4ec0359a5c 1 /*
shennongmin 10:9d4ec0359a5c 2 Print.cpp - Base class that provides print() and println()
shennongmin 10:9d4ec0359a5c 3 Copyright (c) 2008 David A. Mellis. All right reserved.
shennongmin 10:9d4ec0359a5c 4
shennongmin 10:9d4ec0359a5c 5 This library is free software; you can redistribute it and/or
shennongmin 10:9d4ec0359a5c 6 modify it under the terms of the GNU Lesser General Public
shennongmin 10:9d4ec0359a5c 7 License as published by the Free Software Foundation; either
shennongmin 10:9d4ec0359a5c 8 version 2.1 of the License, or (at your option) any later version.
shennongmin 10:9d4ec0359a5c 9
shennongmin 10:9d4ec0359a5c 10 This library is distributed in the hope that it will be useful,
shennongmin 10:9d4ec0359a5c 11 but WITHOUT ANY WARRANTY; without even the implied warranty of
shennongmin 10:9d4ec0359a5c 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
shennongmin 10:9d4ec0359a5c 13 Lesser General Public License for more details.
shennongmin 10:9d4ec0359a5c 14
shennongmin 10:9d4ec0359a5c 15 You should have received a copy of the GNU Lesser General Public
shennongmin 10:9d4ec0359a5c 16 License along with this library; if not, write to the Free Software
shennongmin 10:9d4ec0359a5c 17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
shennongmin 10:9d4ec0359a5c 18
shennongmin 10:9d4ec0359a5c 19 Modified 23 November 2006 by David A. Mellis
shennongmin 10:9d4ec0359a5c 20 */
shennongmin 10:9d4ec0359a5c 21
shennongmin 10:9d4ec0359a5c 22 #include <stdlib.h>
shennongmin 10:9d4ec0359a5c 23 #include <stdio.h>
shennongmin 10:9d4ec0359a5c 24 #include <string.h>
shennongmin 10:9d4ec0359a5c 25 #include <math.h>
shennongmin 10:9d4ec0359a5c 26
shennongmin 10:9d4ec0359a5c 27 #include "Print.h"
shennongmin 10:9d4ec0359a5c 28
shennongmin 10:9d4ec0359a5c 29 // Public Methods //////////////////////////////////////////////////////////////
shennongmin 10:9d4ec0359a5c 30
shennongmin 10:9d4ec0359a5c 31 /* default implementation: may be overridden */
shennongmin 10:9d4ec0359a5c 32 size_t Print::write(const uint8_t *buffer, size_t size)
shennongmin 10:9d4ec0359a5c 33 {
shennongmin 10:9d4ec0359a5c 34 size_t n = 0;
shennongmin 10:9d4ec0359a5c 35 while (size--) {
shennongmin 10:9d4ec0359a5c 36 n += write(*buffer++);
shennongmin 10:9d4ec0359a5c 37 }
shennongmin 10:9d4ec0359a5c 38 return n;
shennongmin 10:9d4ec0359a5c 39 }
shennongmin 10:9d4ec0359a5c 40
shennongmin 10:9d4ec0359a5c 41
shennongmin 10:9d4ec0359a5c 42 size_t Print::print(const String &s)
shennongmin 10:9d4ec0359a5c 43 {
shennongmin 10:9d4ec0359a5c 44 size_t n = 0;
shennongmin 10:9d4ec0359a5c 45 for (uint16_t i = 0; i < s.length(); i++) {
shennongmin 10:9d4ec0359a5c 46 n += write(s[i]);
shennongmin 10:9d4ec0359a5c 47 }
shennongmin 10:9d4ec0359a5c 48 return n;
shennongmin 10:9d4ec0359a5c 49 }
shennongmin 10:9d4ec0359a5c 50
shennongmin 10:9d4ec0359a5c 51 size_t Print::print(const char str[])
shennongmin 10:9d4ec0359a5c 52 {
shennongmin 10:9d4ec0359a5c 53 return write(str);
shennongmin 10:9d4ec0359a5c 54 }
shennongmin 10:9d4ec0359a5c 55
shennongmin 10:9d4ec0359a5c 56 size_t Print::print(char c)
shennongmin 10:9d4ec0359a5c 57 {
shennongmin 10:9d4ec0359a5c 58 return write(c);
shennongmin 10:9d4ec0359a5c 59 }
shennongmin 10:9d4ec0359a5c 60
shennongmin 10:9d4ec0359a5c 61 size_t Print::print(unsigned char b, int base)
shennongmin 10:9d4ec0359a5c 62 {
shennongmin 10:9d4ec0359a5c 63 return print((unsigned long) b, base);
shennongmin 10:9d4ec0359a5c 64 }
shennongmin 10:9d4ec0359a5c 65
shennongmin 10:9d4ec0359a5c 66 size_t Print::print(int n, int base)
shennongmin 10:9d4ec0359a5c 67 {
shennongmin 10:9d4ec0359a5c 68 return print((long) n, base);
shennongmin 10:9d4ec0359a5c 69 }
shennongmin 10:9d4ec0359a5c 70
shennongmin 10:9d4ec0359a5c 71 size_t Print::print(unsigned int n, int base)
shennongmin 10:9d4ec0359a5c 72 {
shennongmin 10:9d4ec0359a5c 73 return print((unsigned long) n, base);
shennongmin 10:9d4ec0359a5c 74 }
shennongmin 10:9d4ec0359a5c 75
shennongmin 10:9d4ec0359a5c 76 size_t Print::print(long n, int base)
shennongmin 10:9d4ec0359a5c 77 {
shennongmin 10:9d4ec0359a5c 78 if (base == 0) {
shennongmin 10:9d4ec0359a5c 79 return write(n);
shennongmin 10:9d4ec0359a5c 80 } else if (base == 10) {
shennongmin 10:9d4ec0359a5c 81 if (n < 0) {
shennongmin 10:9d4ec0359a5c 82 int t = print('-');
shennongmin 10:9d4ec0359a5c 83 n = -n;
shennongmin 10:9d4ec0359a5c 84 return printNumber(n, 10) + t;
shennongmin 10:9d4ec0359a5c 85 }
shennongmin 10:9d4ec0359a5c 86 return printNumber(n, 10);
shennongmin 10:9d4ec0359a5c 87 } else {
shennongmin 10:9d4ec0359a5c 88 return printNumber(n, base);
shennongmin 10:9d4ec0359a5c 89 }
shennongmin 10:9d4ec0359a5c 90 }
shennongmin 10:9d4ec0359a5c 91
shennongmin 10:9d4ec0359a5c 92 size_t Print::print(unsigned long n, int base)
shennongmin 10:9d4ec0359a5c 93 {
shennongmin 10:9d4ec0359a5c 94 if (base == 0) return write(n);
shennongmin 10:9d4ec0359a5c 95 else return printNumber(n, base);
shennongmin 10:9d4ec0359a5c 96 }
shennongmin 10:9d4ec0359a5c 97
shennongmin 10:9d4ec0359a5c 98 size_t Print::print(double n, int digits)
shennongmin 10:9d4ec0359a5c 99 {
shennongmin 10:9d4ec0359a5c 100 return printFloat(n, digits);
shennongmin 10:9d4ec0359a5c 101 }
shennongmin 10:9d4ec0359a5c 102
shennongmin 10:9d4ec0359a5c 103 size_t Print::println(void)
shennongmin 10:9d4ec0359a5c 104 {
shennongmin 10:9d4ec0359a5c 105 size_t n = print('\r');
shennongmin 10:9d4ec0359a5c 106 n += print('\n');
shennongmin 10:9d4ec0359a5c 107 return n;
shennongmin 10:9d4ec0359a5c 108 }
shennongmin 10:9d4ec0359a5c 109
shennongmin 10:9d4ec0359a5c 110 size_t Print::println(const String &s)
shennongmin 10:9d4ec0359a5c 111 {
shennongmin 10:9d4ec0359a5c 112 size_t n = print(s);
shennongmin 10:9d4ec0359a5c 113 n += println();
shennongmin 10:9d4ec0359a5c 114 return n;
shennongmin 10:9d4ec0359a5c 115 }
shennongmin 10:9d4ec0359a5c 116
shennongmin 10:9d4ec0359a5c 117 size_t Print::println(const char c[])
shennongmin 10:9d4ec0359a5c 118 {
shennongmin 10:9d4ec0359a5c 119 size_t n = print(c);
shennongmin 10:9d4ec0359a5c 120 n += println();
shennongmin 10:9d4ec0359a5c 121 return n;
shennongmin 10:9d4ec0359a5c 122 }
shennongmin 10:9d4ec0359a5c 123
shennongmin 10:9d4ec0359a5c 124 size_t Print::println(char c)
shennongmin 10:9d4ec0359a5c 125 {
shennongmin 10:9d4ec0359a5c 126 size_t n = print(c);
shennongmin 10:9d4ec0359a5c 127 n += println();
shennongmin 10:9d4ec0359a5c 128 return n;
shennongmin 10:9d4ec0359a5c 129 }
shennongmin 10:9d4ec0359a5c 130
shennongmin 10:9d4ec0359a5c 131 size_t Print::println(unsigned char b, int base)
shennongmin 10:9d4ec0359a5c 132 {
shennongmin 10:9d4ec0359a5c 133 size_t n = print(b, base);
shennongmin 10:9d4ec0359a5c 134 n += println();
shennongmin 10:9d4ec0359a5c 135 return n;
shennongmin 10:9d4ec0359a5c 136 }
shennongmin 10:9d4ec0359a5c 137
shennongmin 10:9d4ec0359a5c 138 size_t Print::println(int num, int base)
shennongmin 10:9d4ec0359a5c 139 {
shennongmin 10:9d4ec0359a5c 140 size_t n = print(num, base);
shennongmin 10:9d4ec0359a5c 141 n += println();
shennongmin 10:9d4ec0359a5c 142 return n;
shennongmin 10:9d4ec0359a5c 143 }
shennongmin 10:9d4ec0359a5c 144
shennongmin 10:9d4ec0359a5c 145 size_t Print::println(unsigned int num, int base)
shennongmin 10:9d4ec0359a5c 146 {
shennongmin 10:9d4ec0359a5c 147 size_t n = print(num, base);
shennongmin 10:9d4ec0359a5c 148 n += println();
shennongmin 10:9d4ec0359a5c 149 return n;
shennongmin 10:9d4ec0359a5c 150 }
shennongmin 10:9d4ec0359a5c 151
shennongmin 10:9d4ec0359a5c 152 size_t Print::println(long num, int base)
shennongmin 10:9d4ec0359a5c 153 {
shennongmin 10:9d4ec0359a5c 154 size_t n = print(num, base);
shennongmin 10:9d4ec0359a5c 155 n += println();
shennongmin 10:9d4ec0359a5c 156 return n;
shennongmin 10:9d4ec0359a5c 157 }
shennongmin 10:9d4ec0359a5c 158
shennongmin 10:9d4ec0359a5c 159 size_t Print::println(unsigned long num, int base)
shennongmin 10:9d4ec0359a5c 160 {
shennongmin 10:9d4ec0359a5c 161 size_t n = print(num, base);
shennongmin 10:9d4ec0359a5c 162 n += println();
shennongmin 10:9d4ec0359a5c 163 return n;
shennongmin 10:9d4ec0359a5c 164 }
shennongmin 10:9d4ec0359a5c 165
shennongmin 10:9d4ec0359a5c 166 size_t Print::println(double num, int digits)
shennongmin 10:9d4ec0359a5c 167 {
shennongmin 10:9d4ec0359a5c 168 size_t n = print(num, digits);
shennongmin 10:9d4ec0359a5c 169 n += println();
shennongmin 10:9d4ec0359a5c 170 return n;
shennongmin 10:9d4ec0359a5c 171 }
shennongmin 10:9d4ec0359a5c 172
shennongmin 10:9d4ec0359a5c 173 // Private Methods /////////////////////////////////////////////////////////////
shennongmin 10:9d4ec0359a5c 174
shennongmin 10:9d4ec0359a5c 175 size_t Print::printNumber(unsigned long n, uint8_t base) {
shennongmin 10:9d4ec0359a5c 176 char buf[8 * sizeof(long) + 1]; // Assumes 8-bit chars plus zero byte.
shennongmin 10:9d4ec0359a5c 177 char *str = &buf[sizeof(buf) - 1];
shennongmin 10:9d4ec0359a5c 178
shennongmin 10:9d4ec0359a5c 179 *str = '\0';
shennongmin 10:9d4ec0359a5c 180
shennongmin 10:9d4ec0359a5c 181 // prevent crash if called with base == 1
shennongmin 10:9d4ec0359a5c 182 if (base < 2) base = 10;
shennongmin 10:9d4ec0359a5c 183
shennongmin 10:9d4ec0359a5c 184 do {
shennongmin 10:9d4ec0359a5c 185 unsigned long m = n;
shennongmin 10:9d4ec0359a5c 186 n /= base;
shennongmin 10:9d4ec0359a5c 187 char c = m - base * n;
shennongmin 10:9d4ec0359a5c 188 *--str = c < 10 ? c + '0' : c + 'A' - 10;
shennongmin 10:9d4ec0359a5c 189 } while(n);
shennongmin 10:9d4ec0359a5c 190
shennongmin 10:9d4ec0359a5c 191 return write(str);
shennongmin 10:9d4ec0359a5c 192 }
shennongmin 10:9d4ec0359a5c 193
shennongmin 10:9d4ec0359a5c 194 size_t Print::printFloat(double number, uint8_t digits)
shennongmin 10:9d4ec0359a5c 195 {
shennongmin 10:9d4ec0359a5c 196 size_t n = 0;
shennongmin 10:9d4ec0359a5c 197
shennongmin 10:9d4ec0359a5c 198 if (isnan(number)) return print("nan");
shennongmin 10:9d4ec0359a5c 199 if (isinf(number)) return print("inf");
shennongmin 10:9d4ec0359a5c 200 if (number > 4294967040.0) return print ("ovf"); // constant determined empirically
shennongmin 10:9d4ec0359a5c 201 if (number <-4294967040.0) return print ("ovf"); // constant determined empirically
shennongmin 10:9d4ec0359a5c 202
shennongmin 10:9d4ec0359a5c 203 // Handle negative numbers
shennongmin 10:9d4ec0359a5c 204 if (number < 0.0)
shennongmin 10:9d4ec0359a5c 205 {
shennongmin 10:9d4ec0359a5c 206 n += print('-');
shennongmin 10:9d4ec0359a5c 207 number = -number;
shennongmin 10:9d4ec0359a5c 208 }
shennongmin 10:9d4ec0359a5c 209
shennongmin 10:9d4ec0359a5c 210 // Round correctly so that print(1.999, 2) prints as "2.00"
shennongmin 10:9d4ec0359a5c 211 double rounding = 0.5;
shennongmin 10:9d4ec0359a5c 212 for (uint8_t i=0; i<digits; ++i)
shennongmin 10:9d4ec0359a5c 213 rounding /= 10.0;
shennongmin 10:9d4ec0359a5c 214
shennongmin 10:9d4ec0359a5c 215 number += rounding;
shennongmin 10:9d4ec0359a5c 216
shennongmin 10:9d4ec0359a5c 217 // Extract the integer part of the number and print it
shennongmin 10:9d4ec0359a5c 218 unsigned long int_part = (unsigned long)number;
shennongmin 10:9d4ec0359a5c 219 double remainder = number - (double)int_part;
shennongmin 10:9d4ec0359a5c 220 n += print(int_part);
shennongmin 10:9d4ec0359a5c 221
shennongmin 10:9d4ec0359a5c 222 // Print the decimal point, but only if there are digits beyond
shennongmin 10:9d4ec0359a5c 223 if (digits > 0) {
shennongmin 10:9d4ec0359a5c 224 n += print(".");
shennongmin 10:9d4ec0359a5c 225 }
shennongmin 10:9d4ec0359a5c 226
shennongmin 10:9d4ec0359a5c 227 // Extract digits from the remainder one at a time
shennongmin 10:9d4ec0359a5c 228 while (digits-- > 0)
shennongmin 10:9d4ec0359a5c 229 {
shennongmin 10:9d4ec0359a5c 230 remainder *= 10.0;
shennongmin 10:9d4ec0359a5c 231 int toPrint = int(remainder);
shennongmin 10:9d4ec0359a5c 232 n += print(toPrint);
shennongmin 10:9d4ec0359a5c 233 remainder -= toPrint;
shennongmin 10:9d4ec0359a5c 234 }
shennongmin 10:9d4ec0359a5c 235
shennongmin 10:9d4ec0359a5c 236 return n;
shennongmin 10:9d4ec0359a5c 237 }