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360 lines
7.7 KiB
C++
360 lines
7.7 KiB
C++
/*
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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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Modified 03 August 2015 by Chuck Todd
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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 <inttypes.h>
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#include "Print.h"
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#include <stdarg.h>
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#define PrintfEnable 1
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typedef signed short sint16_t;
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typedef signed long sint32_t;
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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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if (write(*buffer++)) n++;
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else break;
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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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//while(1);
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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::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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return write("\r\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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if (isnan(number)) return print("nan");
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if (isinf(number)) return print("inf");
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if (number > 4294967040.0) return print ("ovf"); // constant determined empirically
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if (number <-4294967040.0) return print ("ovf"); // constant determined empirically
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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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}
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#if (PrintfEnable == 1)
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size_t Print::printf(const char *argList, ...)
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{
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const char *ptr;
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double floatNum_f32;
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va_list argp;
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sint16_t num_s16;
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sint32_t num_s32;
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uint16_t num_u16;
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uint32_t num_u32;
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char *str;
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char ch;
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uint8_t numOfDigits;
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va_start(argp, argList);
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/* Loop through the list to extract all the input arguments */
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for(ptr = argList; *ptr != '\0'; ptr++)
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{
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ch= *ptr;
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if(ch == '%') /*Check for '%' as there will be format specifier after it */
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{
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ptr++;
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ch = *ptr;
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if((ch>=0x30) && (ch<=0x39))
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{
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numOfDigits = 0;
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while((ch>=0x30) && (ch<=0x39))
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{
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numOfDigits = (numOfDigits * 10) + (ch-0x30);
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ptr++;
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ch = *ptr;
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}
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}
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else
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{
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numOfDigits = 0xff;
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}
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switch(ch) /* Decode the type of the argument */
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{
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case 'C':
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case 'c': /* Argument type is of char, hence read char data from the argp */
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ch = va_arg(argp, int);
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print(ch);
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break;
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case 'd': /* Argument type is of signed integer, hence read 16bit data from the argp */
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case 'D':
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num_s32 = va_arg(argp, int);
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print(num_s32, 10);
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break;
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case 'u':
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case 'U': /* Argument type is of integer, hence read 32bit unsigend data */
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num_u32 = va_arg(argp, uint32_t);
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print(num_u32, 10);
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break;
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case 'x':
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case 'X': /* Argument type is of hex, hence hexadecimal data from the argp */
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num_u32 = va_arg(argp, uint32_t);
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print(num_u32, 16);
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break;
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case 'b':
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case 'B': /* Argument type is of binary,Read int and convert to binary */
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num_u32 = va_arg(argp, uint32_t);
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print(num_u32, 2);
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break;
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case 'F':
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case 'f': /* Argument type is of float, hence read double data from the argp */
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floatNum_f32 = va_arg(argp, double);
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printFloat(floatNum_f32,10);
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break;
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case 'S':
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case 's': /* Argument type is of string, hence get the pointer to sting passed */
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str = va_arg(argp, char *);
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print(str);
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break;
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case '%':
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print('%');
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break;
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}
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}
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else
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{
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/* As '%' is not detected transmit the char passed */
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print(ch);
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}
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}
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va_end(argp);
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}
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#endif
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