91 lines
2.6 KiB
C++
91 lines
2.6 KiB
C++
/**
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* Copyright (c) 2011-2020 Bill Greiman
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* This file is part of the SdFat library for SD memory cards.
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*
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* MIT License
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include "PrintBasic.h"
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#if ENABLE_ARDUINO_FEATURES == 0
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#include <math.h>
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size_t PrintBasic::print(long n, uint8_t base) {
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if (n < 0 && base == 10) {
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return print('-') + printNum(-n, base);
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}
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return printNum(n, base);
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}
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size_t PrintBasic::printNum(unsigned long n, uint8_t base) {
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const uint8_t DIM = 8 * sizeof(long);
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char buf[DIM];
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char *str = &buf[DIM];
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if (base < 2) return 0;
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do {
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char c = n % base;
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n /= base;
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*--str = c + (c < 10 ? '0' : 'A' - 10);
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} while (n);
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return write(str, &buf[DIM] - str);
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}
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size_t PrintBasic::printDouble(double n, uint8_t prec) {
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// Max printable 32-bit floating point number. AVR uses 32-bit double.
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const double maxfp = static_cast<double>(0XFFFFFF00UL);
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size_t rtn = 0;
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if (isnan(n)) {
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return write("NaN");
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}
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if (n < 0) {
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n = -n;
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rtn += print('-');
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}
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if (isinf(n)) {
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return rtn + write("Inf");
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}
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if (n > maxfp) {
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return rtn + write("Ovf");
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}
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double round = 0.5;
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for (uint8_t i = 0; i < prec; ++i) {
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round *= 0.1;
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}
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n += round;
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uint32_t whole = (uint32_t)n;
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rtn += print(whole);
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if (prec) {
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rtn += print('.');
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double fraction = n - static_cast<double>(whole);
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for (uint8_t i = 0; i < prec; i++) {
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fraction *= 10.0;
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uint8_t digit = fraction;
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rtn += print(digit);
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fraction -= digit;
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}
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}
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return rtn;
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}
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#endif // ENABLE_ARDUINO_FEATURES == 0
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