mirror of
https://github.com/emsesp/EMS-ESP32.git
synced 2025-12-06 07:49:52 +03:00
627 lines
18 KiB
C++
627 lines
18 KiB
C++
/*
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* EMS-ESP - https://github.com/emsesp/EMS-ESP
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* Copyright 2020 Paul Derbyshire
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "helpers.h"
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#include "emsesp.h"
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namespace emsesp {
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// like itoa but for hex, and quicker
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// note: only for single byte hex values
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char * Helpers::hextoa(char * result, const uint8_t value) {
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char * p = result;
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uint8_t nib1 = (value >> 4) & 0x0F;
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uint8_t nib2 = (value >> 0) & 0x0F;
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*p++ = nib1 < 0xA ? '0' + nib1 : 'A' + nib1 - 0xA;
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*p++ = nib2 < 0xA ? '0' + nib2 : 'A' + nib2 - 0xA;
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*p = '\0'; // null terminate just in case
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return result;
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}
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// same as above but to a hex string
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std::string Helpers::hextoa(const uint8_t value, bool prefix) {
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char buf[3];
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if (prefix) {
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return std::string("0x") + hextoa(buf, value);
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}
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return std::string(hextoa(buf, value));
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}
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// same for 16 bit values
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char * Helpers::hextoa(char * result, const uint16_t value) {
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if (value <= 0xFF) {
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return hextoa(result, (uint8_t)value);
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}
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hextoa(result, (uint8_t)(value >> 8));
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hextoa(&result[2], (uint8_t)(value & 0xFF));
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return result;
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}
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// same as above but to a hex string
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std::string Helpers::hextoa(const uint16_t value, bool prefix) {
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char buf[5];
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if (prefix) {
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return std::string("0x") + hextoa(buf, value);
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}
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return std::string(hextoa(buf, value));
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}
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#ifdef EMSESP_STANDALONE
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// special function to work outside of ESP's libraries
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char * Helpers::ultostr(char * ptr, uint32_t value, const uint8_t base) {
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if (nullptr == ptr) {
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return nullptr;
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}
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unsigned long t = 0;
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unsigned long tmp = value;
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int count = 0;
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if (tmp == 0) {
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count++;
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}
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while (tmp > 0) {
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tmp = tmp / base;
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count++;
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}
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ptr += count;
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*ptr = '\0';
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do {
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unsigned long res = value - base * (t = value / base);
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if (res < 10) {
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*--ptr = '0' + res;
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} else if (res < 16) {
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*--ptr = 'A' - 10 + res;
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}
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} while ((value = t) != 0);
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return (ptr);
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}
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#endif
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/**
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* fast atoi returning a std::string
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* http://www.strudel.org.uk/itoa/
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*
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*/
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std::string Helpers::itoa(int16_t value) {
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std::string buf;
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buf.reserve(25); // Pre-allocate enough space.
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int quotient = value;
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do {
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buf += "0123456789abcdef"[std::abs(quotient % 10)];
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quotient /= 10;
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} while (quotient);
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// Append the negative sign
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if (value < 0)
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buf += '-';
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std::reverse(buf.begin(), buf.end());
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return buf;
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}
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/*
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* fast itoa and optimized for ESP32
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* written by Lukás Chmela, Released under GPLv3. http://www.strudel.org.uk/itoa/ version 0.4
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*/
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char * Helpers::itoa(int32_t value, char * result, const uint8_t base) {
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// check that the base if valid
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if (base < 2 || base > 36) {
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*result = '\0';
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return result;
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}
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char * ptr = result, *ptr1 = result;
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int32_t tmp_value;
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do {
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tmp_value = value;
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value /= base;
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*ptr++ = "zyxwvutsrqponmlkjihgfedcba9876543210123456789abcdefghijklmnopqrstuvwxyz"[35 + (tmp_value - value * base)];
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} while (value);
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// Apply negative sign
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if (tmp_value < 0) {
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*ptr++ = '-';
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}
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*ptr-- = '\0';
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while (ptr1 < ptr) {
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char tmp_char = *ptr;
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*ptr-- = *ptr1;
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*ptr1++ = tmp_char;
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}
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return result;
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}
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// for decimals 0 to 99, printed as a 2 char string
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char * Helpers::smallitoa(char * result, const uint8_t value) {
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result[0] = ((value / 10) == 0) ? '0' : (value / 10) + '0';
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result[1] = (value % 10) + '0';
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result[2] = '\0';
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return result;
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}
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// for decimals 0 to 999, printed as a string
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char * Helpers::smallitoa(char * result, const uint16_t value) {
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result[0] = ((value / 100) == 0) ? '0' : (value / 100) + '0';
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result[1] = (((value % 100) / 10) == 0) ? '0' : ((value % 100) / 10) + '0';
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result[2] = (value % 10) + '0';
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result[3] = '\0';
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return result;
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}
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// work out how to display booleans
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// for strings only
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char * Helpers::render_boolean(char * result, bool value) {
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uint8_t bool_format_ = EMSESP::system_.bool_format();
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if (bool_format_ == BOOL_FORMAT_ONOFF_STR) {
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strlcpy(result, value ? read_flash_string(F_(on)).c_str() : read_flash_string(F_(off)).c_str(), 5);
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} else if (bool_format_ == BOOL_FORMAT_ONOFF_STR_CAP) {
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strlcpy(result, value ? read_flash_string(F_(ON)).c_str() : read_flash_string(F_(OFF)).c_str(), 5);
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} else if ((bool_format_ == BOOL_FORMAT_10) || (bool_format_ == BOOL_FORMAT_10_STR)) {
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strlcpy(result, value ? "1" : "0", 2);
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} else {
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strlcpy(result, value ? "true" : "false", 7); // default
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}
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return result;
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}
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// convert unsigned int (single byte) to text value and returns it
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// format: 255(0xFF)=boolean, 0=no formatting, otherwise divide by format
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char * Helpers::render_value(char * result, uint8_t value, int8_t format, const uint8_t fahrenheit) {
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// special check if its a boolean
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if ((uint8_t)format == EMS_VALUE_BOOL) {
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if (value == EMS_VALUE_BOOL_OFF) {
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render_boolean(result, false);
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} else if (value == EMS_VALUE_BOOL_NOTSET) {
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return nullptr;
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} else {
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render_boolean(result, true); // assume on. could have value 0x01 or 0xFF
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}
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return result;
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}
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if (!hasValue(value)) {
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return nullptr;
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}
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int16_t new_value = fahrenheit ? format ? value * 1.8 + 32 * format * (fahrenheit - 1) : value * 1.8 + 32 * (fahrenheit - 1) : value;
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if (!format) {
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itoa(new_value, result, 10); // format = 0
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return result;
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}
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char s2[10];
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// special case for / 2
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if (format == 2) {
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strlcpy(result, itoa(new_value >> 1, s2, 10), 5);
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strlcat(result, ".", 5);
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strlcat(result, ((new_value & 0x01) ? "5" : "0"), 7);
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return result;
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} else if (format == 4) {
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strlcpy(result, itoa(new_value >> 2, s2, 10), 5);
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strlcat(result, ".", 5);
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new_value = (new_value & 0x03) * 25;
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strlcat(result, itoa(new_value, s2, 10), 7);
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return result;
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} else if (format > 0) {
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strlcpy(result, itoa(new_value / format, s2, 10), 5);
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strlcat(result, ".", 5);
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strlcat(result, itoa(new_value % format, s2, 10), 7);
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} else {
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strlcpy(result, itoa(new_value * format * -1, s2, 10), 5);
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}
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return result;
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}
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// float: convert float to char
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// format is the precision, 0 to 8
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char * Helpers::render_value(char * result, const float value, const int8_t format) {
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if (format > 8) {
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return nullptr;
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}
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uint32_t p[] = {0, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000};
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char * ret = result;
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auto whole = (int32_t)value;
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itoa(whole, result, 10);
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while (*result != '\0') {
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result++;
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}
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*result++ = '.';
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int32_t decimal = abs((int32_t)((value - whole) * p[format]));
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itoa(decimal, result, 10);
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return ret;
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}
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// int32: convert signed 32bit to text string and returns string
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// format: 0=no division, other divide by the value given and render with a decimal point
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char * Helpers::render_value(char * result, const int32_t value, const int8_t format, const uint8_t fahrenheit) {
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int32_t new_value = fahrenheit ? format ? value * 1.8 + 32 * format * (fahrenheit - 1) : value * 1.8 + 32 * (fahrenheit - 1) : value;
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char s[10] = {0};
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// just print it if no conversion required (format = 0)
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if (!format) {
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strlcpy(result, itoa(new_value, s, 10), sizeof(s)); // format is 0
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return result;
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}
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result[0] = '\0';
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// check for negative values
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if (new_value < 0) {
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strlcpy(result, "-", sizeof(s));
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new_value *= -1; // convert to positive
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} else {
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strlcpy(result, "", sizeof(s));
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}
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// do floating point
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if (format == 2) {
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// divide by 2
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strlcat(result, itoa(new_value / 2, s, 10), sizeof(s));
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strlcat(result, ".", sizeof(s));
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strlcat(result, ((new_value & 0x01) ? "5" : "0"), sizeof(s));
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} else if (format > 0) {
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strlcat(result, itoa(new_value / format, s, 10), sizeof(s));
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strlcat(result, ".", sizeof(s));
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strlcat(result, itoa(new_value % format, s, 10), sizeof(s));
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} else {
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strlcat(result, itoa(new_value * format * -1, s, 10), sizeof(s));
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}
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return result;
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}
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// int16: convert short (two bytes) to text string and prints it
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char * Helpers::render_value(char * result, const int16_t value, const int8_t format, const uint8_t fahrenheit) {
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if (!hasValue(value)) {
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return nullptr;
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}
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return (render_value(result, (int32_t)value, format, fahrenheit)); // use same code, force it to a signed int
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}
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// uint16: convert unsigned short (two bytes) to text string and prints it
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char * Helpers::render_value(char * result, const uint16_t value, const int8_t format, const uint8_t fahrenheit) {
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if (!hasValue(value)) {
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return nullptr;
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}
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return (render_value(result, (int32_t)value, format, fahrenheit)); // use same code, force it to a signed int
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}
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// int8: convert signed byte to text string and prints it
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char * Helpers::render_value(char * result, const int8_t value, const int8_t format, const uint8_t fahrenheit) {
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if (!hasValue(value)) {
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return nullptr;
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}
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return (render_value(result, (int32_t)value, format, fahrenheit)); // use same code, force it to a signed int
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}
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// uint32: render long (4 byte) unsigned values
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char * Helpers::render_value(char * result, const uint32_t value, const int8_t format, const uint8_t fahrenheit) {
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if (!hasValue(value)) {
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return nullptr;
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}
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result[0] = '\0';
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int32_t new_value = fahrenheit ? format ? value * 1.8 + 32 * format * (fahrenheit - 1) : value * 1.8 + 32 * (fahrenheit - 1) : value;
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char s[10] = {0};
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#ifndef EMSESP_STANDALONE
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if (!format) {
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strlcpy(result, ltoa(new_value, s, 10), sizeof(s)); // format is 0
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} else if (format > 0) {
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strlcpy(result, ltoa(new_value / format, s, 10), sizeof(s));
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strlcat(result, ".", sizeof(s));
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strlcat(result, ltoa(new_value % format, s, 10), sizeof(s));
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} else {
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strlcpy(result, ltoa(new_value * format * -1, s, 10), sizeof(s));
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}
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#else
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if (!format) {
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strlcpy(result, ultostr(s, new_value, 10), sizeof(s)); // format is 0
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} else {
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strlcpy(result, ultostr(s, new_value / format, 10), sizeof(s));
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strlcat(result, ".", sizeof(s));
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strncat(result, ultostr(s, new_value % format, 10), sizeof(s));
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}
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#endif
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return result;
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}
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// creates string of hex values from an arrray of bytes
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std::string Helpers::data_to_hex(const uint8_t * data, const uint8_t length) {
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if (length == 0) {
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return "<empty>";
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}
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char str[160] = {0};
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char buffer[4];
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char * p = &str[0];
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for (uint8_t i = 0; i < length; i++) {
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Helpers::hextoa(buffer, data[i]);
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*p++ = buffer[0];
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*p++ = buffer[1];
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*p++ = ' '; // space
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}
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*--p = '\0'; // null terminate just in case, loosing the trailing space
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return std::string(str);
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}
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// takes a hex string and convert it to an unsigned 32bit number (max 8 hex digits)
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// works with only positive numbers
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uint32_t Helpers::hextoint(const char * hex) {
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if (hex == nullptr) {
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return 0;
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}
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uint32_t val = 0;
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// skip leading '0x'
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if (hex[0] == '0' && hex[1] == 'x') {
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hex += 2;
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}
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while (*hex) {
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// get current character then increment
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char byte = *hex++;
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// transform hex character to the 4bit equivalent number, using the ascii table indexes
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if (byte >= '0' && byte <= '9')
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byte = byte - '0';
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else if (byte >= 'a' && byte <= 'f')
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byte = byte - 'a' + 10;
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else if (byte >= 'A' && byte <= 'F')
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byte = byte - 'A' + 10;
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else
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return 0; // error
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// shift 4 to make space for new digit, and add the 4 bits of the new digit
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val = (val << 4) | (byte & 0xF);
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}
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return val;
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}
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// quick char to long
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int Helpers::atoint(const char * value) {
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int x = 0;
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char s = value[0];
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if (s == '-') {
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++value;
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}
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while (*value >= '0' && *value <= '9') {
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x = (x * 10) + (*value - '0');
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++value;
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}
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if (s == '-') {
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return (-x);
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}
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return x;
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}
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// rounds a number to 2 decimal places
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// example: round2(3.14159) -> 3.14
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// From mvdp:
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// The conversion to Fahrenheit is different for absolute temperatures and relative temperatures like hysteresis.
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// fahrenheit=0 - off, no conversion
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// fahrenheit=1 - relative, 1.8t
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// fahrenheit=2 - absolute, 1.8t + 32(fahrenheit-1).
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float Helpers::round2(float value, const int8_t divider, const uint8_t fahrenheit) {
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float val = (value * 100 + 0.5);
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if (divider > 0) {
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val = ((value / divider) * 100 + 0.5);
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} else if (divider < 0) {
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val = value * -100 * divider;
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}
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if (value < 0) { // negative rounding
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val = val - 1;
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}
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if (fahrenheit) {
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val = val * 1.8 + 3200 * (fahrenheit - 1);
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}
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return ((int32_t)val) / 100.0;
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}
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// abs of a signed 32-bit integer
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uint32_t Helpers::abs(const int32_t i) {
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return (i < 0 ? -i : i);
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}
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// for booleans, use isBool true (EMS_VALUE_BOOL)
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bool Helpers::hasValue(const uint8_t & v, const uint8_t isBool) {
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if (isBool == EMS_VALUE_BOOL) {
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return (v != EMS_VALUE_BOOL_NOTSET);
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}
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return (v != EMS_VALUE_UINT_NOTSET);
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}
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bool Helpers::hasValue(const int8_t & v) {
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return (v != EMS_VALUE_INT_NOTSET);
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}
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bool Helpers::hasValue(const char * v) {
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if ((v == nullptr) || (strlen(v) == 0)) {
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return false;
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}
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return (v[0] != '\0');
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}
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// for short these are typically 0x8300, 0x7D00 and sometimes 0x8000
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bool Helpers::hasValue(const int16_t & v) {
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return (abs(v) < EMS_VALUE_USHORT_NOTSET);
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}
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bool Helpers::hasValue(const uint16_t & v) {
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return (v < EMS_VALUE_USHORT_NOTSET);
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}
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|
|
bool Helpers::hasValue(const uint32_t & v) {
|
|
return (v != EMS_VALUE_ULONG_NOTSET);
|
|
}
|
|
|
|
// checks if we can convert a char string to an int value
|
|
bool Helpers::value2number(const char * v, int & value, const int min, const int max) {
|
|
if ((v == nullptr) || (strlen(v) == 0)) {
|
|
value = 0;
|
|
return false;
|
|
}
|
|
|
|
value = atoi(v);
|
|
if (value >= min && value <= max) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// checks if we can convert a char string to a float value
|
|
bool Helpers::value2float(const char * v, float & value) {
|
|
value = 0;
|
|
if ((v == nullptr) || (strlen(v) == 0)) {
|
|
return false;
|
|
}
|
|
|
|
if (v[0] == '-' || v[0] == '.' || (v[0] >= '0' && v[0] <= '9')) {
|
|
value = atof(v);
|
|
return true;
|
|
}
|
|
|
|
if (v[0] == '+' && (v[1] == '.' || (v[1] >= '0' && v[1] <= '9'))) {
|
|
value = atof(v + 1);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool Helpers::value2temperature(const char * v, float & value, bool relative) {
|
|
if (value2float(v, value)) {
|
|
if (EMSESP::system_.fahrenheit()) {
|
|
value = relative ? (value / 1.8) : (value - 32) / 1.8;
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool Helpers::value2temperature(const char * v, int & value, const bool relative, const int min, const int max) {
|
|
if (value2number(v, value, min, max)) {
|
|
if (EMSESP::system_.fahrenheit()) {
|
|
value = relative ? (value / 1.8) : (value - 32) / 1.8;
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// https://stackoverflow.com/questions/313970/how-to-convert-stdstring-to-lower-case
|
|
std::string Helpers::toLower(std::string const & s) {
|
|
std::string lc = s;
|
|
std::transform(lc.begin(), lc.end(), lc.begin(), [](unsigned char c) { return std::tolower(c); });
|
|
return lc;
|
|
}
|
|
|
|
std::string Helpers::toUpper(std::string const & s) {
|
|
std::string lc = s;
|
|
std::transform(lc.begin(), lc.end(), lc.begin(), [](unsigned char c) { return std::toupper(c); });
|
|
return lc;
|
|
}
|
|
|
|
// checks if we can convert a char string to a lowercase string
|
|
bool Helpers::value2string(const char * v, std::string & value) {
|
|
if ((v == nullptr) || (strlen(v) == 0)) {
|
|
value = std::string{};
|
|
return false;
|
|
}
|
|
value = toLower(v);
|
|
return true;
|
|
}
|
|
|
|
// checks to see if a string (usually a command or payload cmd) looks like a boolean
|
|
// on, off, true, false, 1, 0
|
|
bool Helpers::value2bool(const char * v, bool & value) {
|
|
if ((v == nullptr) || (strlen(v) == 0)) {
|
|
return false;
|
|
}
|
|
|
|
std::string bool_str = toLower(v); // convert to lower case
|
|
|
|
if ((bool_str == read_flash_string(F_(on))) || (bool_str == "1") || (bool_str == "true")) {
|
|
value = true;
|
|
return true; // is a bool
|
|
}
|
|
|
|
if ((bool_str == read_flash_string(F_(off))) || (bool_str == "0") || (bool_str == "false")) {
|
|
value = false;
|
|
return true; // is a bool
|
|
}
|
|
|
|
return false; // not a bool
|
|
}
|
|
|
|
// checks to see if a string is member of a vector and return the index, also allow true/false for on/off
|
|
bool Helpers::value2enum(const char * v, uint8_t & value, const __FlashStringHelper * const * strs) {
|
|
if ((v == nullptr) || (strlen(v) == 0)) {
|
|
return false;
|
|
}
|
|
std::string str = toLower(v);
|
|
for (value = 0; strs[value]; value++) {
|
|
std::string str1 = toLower(read_flash_string(strs[value]));
|
|
if ((str1 != "")
|
|
&& ((str1 == read_flash_string(F_(off)) && str == "false") || (str1 == read_flash_string(F_(on)) && str == "true") || (str == str1)
|
|
|| (v[0] == ('0' + value) && v[1] == '\0'))) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// replace char in char string
|
|
void Helpers::replace_char(char * str, char find, char replace) {
|
|
int i = 0;
|
|
|
|
while (str[i] != '\0') {
|
|
/*Replace the matched character...*/
|
|
if (str[i] == find)
|
|
str[i] = replace;
|
|
|
|
i++;
|
|
}
|
|
}
|
|
|
|
} // namespace emsesp
|