71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
/*
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*
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* temphelper.c: aid in converting temperature units
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*
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* Copyright (C) 2008 Phil Sutter <Phil@nwl.cc>
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*
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* This library 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 2 of the License, or
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* (at your option) any later version.
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*
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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
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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 library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
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* USA.
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*
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*/
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#include "temphelper.h"
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#include <sys/types.h>
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#include <cctype>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include "config.h"
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#include "conky.h"
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template <>
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conky::lua_traits<TEMP_UNIT>::Map conky::lua_traits<TEMP_UNIT>::map = {
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{"celsius", TEMP_CELSIUS}, {"fahrenheit", TEMP_FAHRENHEIT}};
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static conky::simple_config_setting<TEMP_UNIT> output_unit("temperature_unit",
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TEMP_CELSIUS, true);
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static double fahrenheit_to_celsius(double n) { return ((n - 32) * 5 / 9); }
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static double celsius_to_fahrenheit(double n) { return ((n * 9 / 5) + 32); }
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static double convert_temp_output(double n, enum TEMP_UNIT input_unit) {
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if (input_unit == output_unit.get(*state)) { return n; }
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switch (output_unit.get(*state)) {
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case TEMP_CELSIUS:
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return fahrenheit_to_celsius(n);
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case TEMP_FAHRENHEIT:
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return celsius_to_fahrenheit(n);
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}
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/* NOT REACHED */
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return 0.0;
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}
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int temp_print(char *p, size_t p_max_size, double n, enum TEMP_UNIT input_unit,
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int to_int) {
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int i_out = 0;
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float f_out = 0.0;
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size_t plen = 0;
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if (1 == to_int) {
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i_out = round_to_int_temp(convert_temp_output(n, input_unit));
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plen = spaced_print(p, p_max_size, "%d", 3, i_out);
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} else {
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f_out = convert_temp_output(n, input_unit);
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plen = spaced_print(p, p_max_size, "%.2f", 3, f_out);
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}
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return static_cast<int>(!(plen >= p_max_size));
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}
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