arduino-esp32/cores/esp32/Print.cpp
2016-10-11 11:42:47 +03:00

306 lines
6.3 KiB
C++

/*
Print.cpp - Base class that provides print() and println()
Copyright (c) 2008 David A. Mellis. All right reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Modified 23 November 2006 by David A. Mellis
Modified December 2014 by Ivan Grokhotkov
Modified May 2015 by Michael C. Miller - ESP31B progmem support
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include "Arduino.h"
#include "Print.h"
extern "C" {
//#include "esp_common.h"
}
// Public Methods //////////////////////////////////////////////////////////////
/* default implementation: may be overridden */
size_t Print::write(const uint8_t *buffer, size_t size)
{
size_t n = 0;
while(size--) {
n += write(*buffer++);
}
return n;
}
size_t Print::printf(const char *format, ...)
{
char loc_buf[64];
char * temp = loc_buf;
va_list arg;
va_list copy;
va_start(arg, format);
va_copy(copy, arg);
size_t len = vsnprintf(NULL, 0, format, arg);
va_end(copy);
if(len >= sizeof(loc_buf)){
temp = new char[len+1];
if(temp == NULL) {
return 0;
}
}
len = vsnprintf(temp, len+1, format, arg);
write((uint8_t*)temp, len);
va_end(arg);
if(len > 64){
delete[] temp;
}
return len;
}
/*
size_t Print::print(const __FlashStringHelper *ifsh) {
PGM_P p = reinterpret_cast<PGM_P>(ifsh);
size_t n = 0;
while (1) {
uint8_t c = pgm_read_byte(p++);
if (c == 0) break;
n += write(c);
}
return n;
}
*/
size_t Print::print(const String &s)
{
return write(s.c_str(), s.length());
}
size_t Print::print(const char str[])
{
return write(str);
}
size_t Print::print(char c)
{
return write(c);
}
size_t Print::print(unsigned char b, int base)
{
return print((unsigned long) b, base);
}
size_t Print::print(int n, int base)
{
return print((long) n, base);
}
size_t Print::print(unsigned int n, int base)
{
return print((unsigned long) n, base);
}
size_t Print::print(long n, int base)
{
if(base == 0) {
return write(n);
} else if(base == 10) {
if(n < 0) {
int t = print('-');
n = -n;
return printNumber(n, 10) + t;
}
return printNumber(n, 10);
} else {
return printNumber(n, base);
}
}
size_t Print::print(unsigned long n, int base)
{
if(base == 0) {
return write(n);
} else {
return printNumber(n, base);
}
}
size_t Print::print(double n, int digits)
{
return printFloat(n, digits);
}
/*
size_t Print::println(const __FlashStringHelper *ifsh)
{
size_t n = print(ifsh);
n += println();
return n;
}
*/
size_t Print::print(const Printable& x)
{
return x.printTo(*this);
}
size_t Print::println(void)
{
return print("\r\n");
}
size_t Print::println(const String &s)
{
size_t n = print(s);
n += println();
return n;
}
size_t Print::println(const char c[])
{
size_t n = print(c);
n += println();
return n;
}
size_t Print::println(char c)
{
size_t n = print(c);
n += println();
return n;
}
size_t Print::println(unsigned char b, int base)
{
size_t n = print(b, base);
n += println();
return n;
}
size_t Print::println(int num, int base)
{
size_t n = print(num, base);
n += println();
return n;
}
size_t Print::println(unsigned int num, int base)
{
size_t n = print(num, base);
n += println();
return n;
}
size_t Print::println(long num, int base)
{
size_t n = print(num, base);
n += println();
return n;
}
size_t Print::println(unsigned long num, int base)
{
size_t n = print(num, base);
n += println();
return n;
}
size_t Print::println(double num, int digits)
{
size_t n = print(num, digits);
n += println();
return n;
}
size_t Print::println(const Printable& x)
{
size_t n = print(x);
n += println();
return n;
}
// Private Methods /////////////////////////////////////////////////////////////
size_t Print::printNumber(unsigned long n, uint8_t base)
{
char buf[8 * sizeof(long) + 1]; // Assumes 8-bit chars plus zero byte.
char *str = &buf[sizeof(buf) - 1];
*str = '\0';
// prevent crash if called with base == 1
if(base < 2) {
base = 10;
}
do {
unsigned long m = n;
n /= base;
char c = m - base * n;
*--str = c < 10 ? c + '0' : c + 'A' - 10;
} while(n);
return write(str);
}
size_t Print::printFloat(double number, uint8_t digits)
{
size_t n = 0;
if(isnan(number)) {
return print("nan");
}
if(isinf(number)) {
return print("inf");
}
if(number > 4294967040.0) {
return print("ovf"); // constant determined empirically
}
if(number < -4294967040.0) {
return print("ovf"); // constant determined empirically
}
// Handle negative numbers
if(number < 0.0) {
n += print('-');
number = -number;
}
// Round correctly so that print(1.999, 2) prints as "2.00"
double rounding = 0.5;
for(uint8_t i = 0; i < digits; ++i) {
rounding /= 10.0;
}
number += rounding;
// Extract the integer part of the number and print it
unsigned long int_part = (unsigned long) number;
double remainder = number - (double) int_part;
n += print(int_part);
// Print the decimal point, but only if there are digits beyond
if(digits > 0) {
n += print(".");
}
// Extract digits from the remainder one at a time
while(digits-- > 0) {
remainder *= 10.0;
int toPrint = int(remainder);
n += print(toPrint);
remainder -= toPrint;
}
return n;
}