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Rene Zeldenthuis
2022-07-05 15:49:07 +02:00
parent cf5188d034
commit 0db0a5d479
3 changed files with 99 additions and 3 deletions
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54
include/format_si.h Normal file
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#pragma once
#include <Arduino.h>
String format_value(float value)
{
if (value == 0.0)
return "0";
if (value < 0)
return "-" + format_value(-value);
// No decimal places
if (value >= 1)
return String(value, 0);
if (value < 0.001f)
return String(value, 4);
if (value < 0.01f)
return String(value, 3);
if (value < 0.1f)
return String(value, 2);
return String(value, 1);
}
String format_si(double value, int decimal_places = 2)
{
if (value == 0.0)
return "0";
if (value < 0)
return "-" + format_si(-value, decimal_places);
auto value_abs = fabs(value);
if (value_abs < 1E-9)
return String(value * 1E9, decimal_places) + "p";
if (value_abs < 1E-6)
return String(value * 1E9, decimal_places) + "n";
if (value_abs < 1E-3)
return String(value * 1E6, decimal_places) + "u";
if (value_abs < 1)
return String(value * 1E3, decimal_places) + "m";
if (value_abs < 1E3)
return String(value, decimal_places);
if (value_abs < 1E6)
return String(value / 1E3, decimal_places) + "k";
if (value_abs < 1E9)
return String(value / 1E6, decimal_places) + "M";
if (value_abs < 1E12)
return String(value / 1E9, decimal_places) + "G";
if (value_abs < 1E15)
return String(value / 1E12, decimal_places) + "T";
return "NaN";
}