mirror of
https://github.com/Llewellynvdm/conky.git
synced 2024-11-16 01:57:09 +00:00
95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
/* temphelper.c: aid in converting temperature units
|
|
*
|
|
* Copyright (C) 2008 Phil Sutter <Phil@nwl.cc>
|
|
*
|
|
* This library is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU 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.
|
|
*
|
|
*/
|
|
#include "config.h"
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
#include <sys/types.h>
|
|
#include "temphelper.h"
|
|
#include "conky.h"
|
|
|
|
/* default to output in celsius */
|
|
static enum TEMP_UNIT output_unit = TEMP_CELSIUS;
|
|
|
|
static double
|
|
fahrenheit_to_celsius(double n)
|
|
{
|
|
return ((n - 32) * 5 / 9);
|
|
}
|
|
|
|
static double
|
|
celsius_to_fahrenheit(double n)
|
|
{
|
|
return ((n * 9 / 5) + 32);
|
|
}
|
|
|
|
int
|
|
set_temp_output_unit(const char *name)
|
|
{
|
|
size_t i;
|
|
int rc = 0;
|
|
char *buf;
|
|
|
|
if (!name)
|
|
return 1;
|
|
|
|
buf = strdup(name);
|
|
for (i = 0; i < strlen(name); i++)
|
|
buf[i] = tolower(name[i]);
|
|
|
|
if (!strcmp(buf, "celsius"))
|
|
output_unit = TEMP_CELSIUS;
|
|
else if (!strcmp(buf, "fahrenheit"))
|
|
output_unit = TEMP_FAHRENHEIT;
|
|
else
|
|
rc = 1;
|
|
free(buf);
|
|
return rc;
|
|
}
|
|
|
|
static double
|
|
convert_temp_output(double n, enum TEMP_UNIT input_unit)
|
|
{
|
|
if (input_unit == output_unit)
|
|
return n;
|
|
|
|
switch(output_unit) {
|
|
case TEMP_CELSIUS:
|
|
return fahrenheit_to_celsius(n);
|
|
case TEMP_FAHRENHEIT:
|
|
return celsius_to_fahrenheit(n);
|
|
}
|
|
/* NOT REACHED */
|
|
return 0.0;
|
|
}
|
|
|
|
int temp_print(char *p, size_t p_max_size, double n, enum TEMP_UNIT input_unit)
|
|
{
|
|
int out;
|
|
size_t plen;
|
|
|
|
out = round_to_int(convert_temp_output(n, input_unit));
|
|
plen = spaced_print(p, p_max_size, "%d", 3, out);
|
|
|
|
return !(plen >= p_max_size);
|
|
}
|