pengfei wu / Mbed 2 deprecated ESP8266Program

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Dependencies:   mbed

Print.cpp@10:9d4ec0359a5c, 2015-02-02 (annotated)

Committer:
shennongmin
Date:
Mon Feb 02 09:46:16 2015 +0000
Revision:
10:9d4ec0359a5c
Child:
24:b5ba3e321e34
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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
shennongmin 10:9d4ec0359a5c 28 #include "Print.h"
shennongmin 10:9d4ec0359a5c 29
shennongmin 10:9d4ec0359a5c 30 // Public Methods //////////////////////////////////////////////////////////////
shennongmin 10:9d4ec0359a5c 31
shennongmin 10:9d4ec0359a5c 32 /* default implementation: may be overridden */
shennongmin 10:9d4ec0359a5c 33 size_t Print::write(const uint8_t *buffer, size_t size)
shennongmin 10:9d4ec0359a5c 34 {
shennongmin 10:9d4ec0359a5c 35 size_t n = 0;
shennongmin 10:9d4ec0359a5c 36 while (size--) {
shennongmin 10:9d4ec0359a5c 37 n += write(*buffer++);
shennongmin 10:9d4ec0359a5c 38 }
shennongmin 10:9d4ec0359a5c 39 return n;
shennongmin 10:9d4ec0359a5c 40 }
shennongmin 10:9d4ec0359a5c 41
shennongmin 10:9d4ec0359a5c 42
shennongmin 10:9d4ec0359a5c 43 size_t Print::print(const String &s)
shennongmin 10:9d4ec0359a5c 44 {
shennongmin 10:9d4ec0359a5c 45 size_t n = 0;
shennongmin 10:9d4ec0359a5c 46 for (uint16_t i = 0; i < s.length(); i++) {
shennongmin 10:9d4ec0359a5c 47 n += write(s[i]);
shennongmin 10:9d4ec0359a5c 48 }
shennongmin 10:9d4ec0359a5c 49 return n;
shennongmin 10:9d4ec0359a5c 50 }
shennongmin 10:9d4ec0359a5c 51
shennongmin 10:9d4ec0359a5c 52 size_t Print::print(const char str[])
shennongmin 10:9d4ec0359a5c 53 {
shennongmin 10:9d4ec0359a5c 54 return write(str);
shennongmin 10:9d4ec0359a5c 55 }
shennongmin 10:9d4ec0359a5c 56
shennongmin 10:9d4ec0359a5c 57 size_t Print::print(char c)
shennongmin 10:9d4ec0359a5c 58 {
shennongmin 10:9d4ec0359a5c 59 return write(c);
shennongmin 10:9d4ec0359a5c 60 }
shennongmin 10:9d4ec0359a5c 61
shennongmin 10:9d4ec0359a5c 62 size_t Print::print(unsigned char b, int base)
shennongmin 10:9d4ec0359a5c 63 {
shennongmin 10:9d4ec0359a5c 64 return print((unsigned long) b, base);
shennongmin 10:9d4ec0359a5c 65 }
shennongmin 10:9d4ec0359a5c 66
shennongmin 10:9d4ec0359a5c 67 size_t Print::print(int n, int base)
shennongmin 10:9d4ec0359a5c 68 {
shennongmin 10:9d4ec0359a5c 69 return print((long) n, base);
shennongmin 10:9d4ec0359a5c 70 }
shennongmin 10:9d4ec0359a5c 71
shennongmin 10:9d4ec0359a5c 72 size_t Print::print(unsigned int n, int base)
shennongmin 10:9d4ec0359a5c 73 {
shennongmin 10:9d4ec0359a5c 74 return print((unsigned long) n, base);
shennongmin 10:9d4ec0359a5c 75 }
shennongmin 10:9d4ec0359a5c 76
shennongmin 10:9d4ec0359a5c 77 size_t Print::print(long n, int base)
shennongmin 10:9d4ec0359a5c 78 {
shennongmin 10:9d4ec0359a5c 79 if (base == 0) {
shennongmin 10:9d4ec0359a5c 80 return write(n);
shennongmin 10:9d4ec0359a5c 81 } else if (base == 10) {
shennongmin 10:9d4ec0359a5c 82 if (n < 0) {
shennongmin 10:9d4ec0359a5c 83 int t = print('-');
shennongmin 10:9d4ec0359a5c 84 n = -n;
shennongmin 10:9d4ec0359a5c 85 return printNumber(n, 10) + t;
shennongmin 10:9d4ec0359a5c 86 }
shennongmin 10:9d4ec0359a5c 87 return printNumber(n, 10);
shennongmin 10:9d4ec0359a5c 88 } else {
shennongmin 10:9d4ec0359a5c 89 return printNumber(n, base);
shennongmin 10:9d4ec0359a5c 90 }
shennongmin 10:9d4ec0359a5c 91 }
shennongmin 10:9d4ec0359a5c 92
shennongmin 10:9d4ec0359a5c 93 size_t Print::print(unsigned long n, int base)
shennongmin 10:9d4ec0359a5c 94 {
shennongmin 10:9d4ec0359a5c 95 if (base == 0) return write(n);
shennongmin 10:9d4ec0359a5c 96 else return printNumber(n, base);
shennongmin 10:9d4ec0359a5c 97 }
shennongmin 10:9d4ec0359a5c 98
shennongmin 10:9d4ec0359a5c 99 size_t Print::print(double n, int digits)
shennongmin 10:9d4ec0359a5c 100 {
shennongmin 10:9d4ec0359a5c 101 return printFloat(n, digits);
shennongmin 10:9d4ec0359a5c 102 }
shennongmin 10:9d4ec0359a5c 103
shennongmin 10:9d4ec0359a5c 104 size_t Print::println(void)
shennongmin 10:9d4ec0359a5c 105 {
shennongmin 10:9d4ec0359a5c 106 size_t n = print('\r');
shennongmin 10:9d4ec0359a5c 107 n += print('\n');
shennongmin 10:9d4ec0359a5c 108 return n;
shennongmin 10:9d4ec0359a5c 109 }
shennongmin 10:9d4ec0359a5c 110
shennongmin 10:9d4ec0359a5c 111 size_t Print::println(const String &s)
shennongmin 10:9d4ec0359a5c 112 {
shennongmin 10:9d4ec0359a5c 113 size_t n = print(s);
shennongmin 10:9d4ec0359a5c 114 n += println();
shennongmin 10:9d4ec0359a5c 115 return n;
shennongmin 10:9d4ec0359a5c 116 }
shennongmin 10:9d4ec0359a5c 117
shennongmin 10:9d4ec0359a5c 118 size_t Print::println(const char c[])
shennongmin 10:9d4ec0359a5c 119 {
shennongmin 10:9d4ec0359a5c 120 size_t n = print(c);
shennongmin 10:9d4ec0359a5c 121 n += println();
shennongmin 10:9d4ec0359a5c 122 return n;
shennongmin 10:9d4ec0359a5c 123 }
shennongmin 10:9d4ec0359a5c 124
shennongmin 10:9d4ec0359a5c 125 size_t Print::println(char c)
shennongmin 10:9d4ec0359a5c 126 {
shennongmin 10:9d4ec0359a5c 127 size_t n = print(c);
shennongmin 10:9d4ec0359a5c 128 n += println();
shennongmin 10:9d4ec0359a5c 129 return n;
shennongmin 10:9d4ec0359a5c 130 }
shennongmin 10:9d4ec0359a5c 131
shennongmin 10:9d4ec0359a5c 132 size_t Print::println(unsigned char b, int base)
shennongmin 10:9d4ec0359a5c 133 {
shennongmin 10:9d4ec0359a5c 134 size_t n = print(b, base);
shennongmin 10:9d4ec0359a5c 135 n += println();
shennongmin 10:9d4ec0359a5c 136 return n;
shennongmin 10:9d4ec0359a5c 137 }
shennongmin 10:9d4ec0359a5c 138
shennongmin 10:9d4ec0359a5c 139 size_t Print::println(int num, int base)
shennongmin 10:9d4ec0359a5c 140 {
shennongmin 10:9d4ec0359a5c 141 size_t n = print(num, base);
shennongmin 10:9d4ec0359a5c 142 n += println();
shennongmin 10:9d4ec0359a5c 143 return n;
shennongmin 10:9d4ec0359a5c 144 }
shennongmin 10:9d4ec0359a5c 145
shennongmin 10:9d4ec0359a5c 146 size_t Print::println(unsigned int num, int base)
shennongmin 10:9d4ec0359a5c 147 {
shennongmin 10:9d4ec0359a5c 148 size_t n = print(num, base);
shennongmin 10:9d4ec0359a5c 149 n += println();
shennongmin 10:9d4ec0359a5c 150 return n;
shennongmin 10:9d4ec0359a5c 151 }
shennongmin 10:9d4ec0359a5c 152
shennongmin 10:9d4ec0359a5c 153 size_t Print::println(long num, int base)
shennongmin 10:9d4ec0359a5c 154 {
shennongmin 10:9d4ec0359a5c 155 size_t n = print(num, base);
shennongmin 10:9d4ec0359a5c 156 n += println();
shennongmin 10:9d4ec0359a5c 157 return n;
shennongmin 10:9d4ec0359a5c 158 }
shennongmin 10:9d4ec0359a5c 159
shennongmin 10:9d4ec0359a5c 160 size_t Print::println(unsigned long num, int base)
shennongmin 10:9d4ec0359a5c 161 {
shennongmin 10:9d4ec0359a5c 162 size_t n = print(num, base);
shennongmin 10:9d4ec0359a5c 163 n += println();
shennongmin 10:9d4ec0359a5c 164 return n;
shennongmin 10:9d4ec0359a5c 165 }
shennongmin 10:9d4ec0359a5c 166
shennongmin 10:9d4ec0359a5c 167 size_t Print::println(double num, int digits)
shennongmin 10:9d4ec0359a5c 168 {
shennongmin 10:9d4ec0359a5c 169 size_t n = print(num, digits);
shennongmin 10:9d4ec0359a5c 170 n += println();
shennongmin 10:9d4ec0359a5c 171 return n;
shennongmin 10:9d4ec0359a5c 172 }
shennongmin 10:9d4ec0359a5c 173
shennongmin 10:9d4ec0359a5c 174 // Private Methods /////////////////////////////////////////////////////////////
shennongmin 10:9d4ec0359a5c 175
shennongmin 10:9d4ec0359a5c 176 size_t Print::printNumber(unsigned long n, uint8_t base) {
shennongmin 10:9d4ec0359a5c 177 char buf[8 * sizeof(long) + 1]; // Assumes 8-bit chars plus zero byte.
shennongmin 10:9d4ec0359a5c 178 char *str = &buf[sizeof(buf) - 1];
shennongmin 10:9d4ec0359a5c 179
shennongmin 10:9d4ec0359a5c 180 *str = '\0';
shennongmin 10:9d4ec0359a5c 181
shennongmin 10:9d4ec0359a5c 182 // prevent crash if called with base == 1
shennongmin 10:9d4ec0359a5c 183 if (base < 2) base = 10;
shennongmin 10:9d4ec0359a5c 184
shennongmin 10:9d4ec0359a5c 185 do {
shennongmin 10:9d4ec0359a5c 186 unsigned long m = n;
shennongmin 10:9d4ec0359a5c 187 n /= base;
shennongmin 10:9d4ec0359a5c 188 char c = m - base * n;
shennongmin 10:9d4ec0359a5c 189 *--str = c < 10 ? c + '0' : c + 'A' - 10;
shennongmin 10:9d4ec0359a5c 190 } while(n);
shennongmin 10:9d4ec0359a5c 191
shennongmin 10:9d4ec0359a5c 192 return write(str);
shennongmin 10:9d4ec0359a5c 193 }
shennongmin 10:9d4ec0359a5c 194
shennongmin 10:9d4ec0359a5c 195 size_t Print::printFloat(double number, uint8_t digits)
shennongmin 10:9d4ec0359a5c 196 {
shennongmin 10:9d4ec0359a5c 197 size_t n = 0;
shennongmin 10:9d4ec0359a5c 198
shennongmin 10:9d4ec0359a5c 199 if (isnan(number)) return print("nan");
shennongmin 10:9d4ec0359a5c 200 if (isinf(number)) return print("inf");
shennongmin 10:9d4ec0359a5c 201 if (number > 4294967040.0) return print ("ovf"); // constant determined empirically
shennongmin 10:9d4ec0359a5c 202 if (number <-4294967040.0) return print ("ovf"); // constant determined empirically
shennongmin 10:9d4ec0359a5c 203
shennongmin 10:9d4ec0359a5c 204 // Handle negative numbers
shennongmin 10:9d4ec0359a5c 205 if (number < 0.0)
shennongmin 10:9d4ec0359a5c 206 {
shennongmin 10:9d4ec0359a5c 207 n += print('-');
shennongmin 10:9d4ec0359a5c 208 number = -number;
shennongmin 10:9d4ec0359a5c 209 }
shennongmin 10:9d4ec0359a5c 210
shennongmin 10:9d4ec0359a5c 211 // Round correctly so that print(1.999, 2) prints as "2.00"
shennongmin 10:9d4ec0359a5c 212 double rounding = 0.5;
shennongmin 10:9d4ec0359a5c 213 for (uint8_t i=0; i<digits; ++i)
shennongmin 10:9d4ec0359a5c 214 rounding /= 10.0;
shennongmin 10:9d4ec0359a5c 215
shennongmin 10:9d4ec0359a5c 216 number += rounding;
shennongmin 10:9d4ec0359a5c 217
shennongmin 10:9d4ec0359a5c 218 // Extract the integer part of the number and print it
shennongmin 10:9d4ec0359a5c 219 unsigned long int_part = (unsigned long)number;
shennongmin 10:9d4ec0359a5c 220 double remainder = number - (double)int_part;
shennongmin 10:9d4ec0359a5c 221 n += print(int_part);
shennongmin 10:9d4ec0359a5c 222
shennongmin 10:9d4ec0359a5c 223 // Print the decimal point, but only if there are digits beyond
shennongmin 10:9d4ec0359a5c 224 if (digits > 0) {
shennongmin 10:9d4ec0359a5c 225 n += print(".");
shennongmin 10:9d4ec0359a5c 226 }
shennongmin 10:9d4ec0359a5c 227
shennongmin 10:9d4ec0359a5c 228 // Extract digits from the remainder one at a time
shennongmin 10:9d4ec0359a5c 229 while (digits-- > 0)
shennongmin 10:9d4ec0359a5c 230 {
shennongmin 10:9d4ec0359a5c 231 remainder *= 10.0;
shennongmin 10:9d4ec0359a5c 232 int toPrint = int(remainder);
shennongmin 10:9d4ec0359a5c 233 n += print(toPrint);
shennongmin 10:9d4ec0359a5c 234 remainder -= toPrint;
shennongmin 10:9d4ec0359a5c 235 }
shennongmin 10:9d4ec0359a5c 236
shennongmin 10:9d4ec0359a5c 237 return n;
shennongmin 10:9d4ec0359a5c 238 }