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#include <math.h>
#include "unit.h"
/* Kilograms per pound. */
#define KG_PER_LB 0.45359237
/* Acceleration of gravity [m/(s*s)]. */
#define G 9.80665
/* Metres per inch. */
#define M_PER_IN 0.0254
/* Metres per foot. */
#define M_PER_FT 0.3048
/* Seconds per minute. */
#define SEC_PER_MIN 60.0
/* Zero Celsius in Kelvin. */
#define ZERO_C 273.15
AngularSpeed
rad_per_sec(double x) {
return x;
}
AngularSpeed
deg_per_sec(double x) {
return x * M_PI / 180.0;
}
AngularSpeed rpm(double x) {
return x * 2.0 * M_PI / 60.0;
}
double as_rad_per_sec(AngularSpeed x) {
return x;
}
double as_deg_per_sec(AngularSpeed x) {
return x * 180.0 / M_PI;
}
double as_rpm(AngularSpeed x) {
return x * 60.0 / (2.0 * M_PI);
}
Fraction
percent(double x) {
return x / 100.0;
}
double
as_percent(Fraction x) {
return x * 100.0;
}
Pressure
pascal(double x) {
return x;
}
Pressure
millibar(double x) {
return x * 100.0;
}
Pressure
kilopascal(double x) {
return x * 1e3;
}
Pressure
bar(double x) {
return x * 1e5;
}
Pressure
psi(double x) {
return x * KG_PER_LB * G / pow(M_PER_IN, 2);
}
Pressure
inch_mercury(double x) {
return x * 3386.389;
}
double
as_pascal(Pressure x) {
return x;
}
double
as_millibar(Pressure x) {
return x / 100.0;
}
double
as_kilopascal(Pressure x) {
return x * 1e-3;
}
double
as_bar(Pressure x) {
return x * 1e-5;
}
double
as_psi(Pressure x) {
return x * pow(M_PER_IN, 2) / (KG_PER_LB * G);
}
double
as_inch_mercury(Pressure x) {
return x / 3386.389;
}
Temperature
kelvin(double x) {
return x;
}
Temperature
celsius(double x) {
return x + ZERO_C;
}
Temperature
fahrenheit(double x) {
double c;
c = (x - 32.0) * 5.0 / 9.0;
return c + ZERO_C;
}
Temperature
rankine(double x) {
return x * 5.0 / 9.0;
}
double
as_kelvin(Temperature t) {
return t;
}
double
as_celsius(Temperature t) {
return t - ZERO_C;
}
double
as_fahrenheit(Temperature t) {
return as_celsius(t) * 9.0 / 5.0 + 32.0;
}
double
as_rankine(Temperature t) {
return t * 9.0 / 5.0;
}
Volume
cubic_centimetre(double x) {
return x * 1e-6;
}
Volume
litre(double x) {
return x * 1e-3;
}
Volume
cubic_metre(double x) {
return x;
}
Volume
cubic_inch(double x) {
return x * 1.6387064e-5;
}
double
as_cubic_centimetre(Volume x) {
return x * 1e6;
}
double
as_litre(Volume x) {
return x * 1e3;
}
double
as_cubic_metre(double x) {
return x;
}
double
as_cubic_inch(double x) {
return x / 1.6387064e-5;
}
VolumeFlowRate
cubic_metre_per_sec(double x) {
return x;
}
VolumeFlowRate
cubic_metre_per_min(double x) {
return x / SEC_PER_MIN;
}
VolumeFlowRate
cubic_foot_per_min(double x) {
return x * pow(M_PER_FT, 3) / SEC_PER_MIN;
}
double
as_cubic_metre_per_sec(VolumeFlowRate x) {
return x;
}
double
as_cubic_metre_per_min(VolumeFlowRate x) {
return x * SEC_PER_MIN;
}
double
as_cubic_foot_per_min(VolumeFlowRate x) {
return x * SEC_PER_MIN / pow(M_PER_FT, 3);
}
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