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use byteorder::ByteOrder;
use ctl_error::SysctlError;
use ctl_info::CtlInfo;
use ctl_type::CtlType;
use ctl_value::CtlValue;
use std::f32;
#[derive(Debug, Copy, Clone, PartialEq, PartialOrd)]
pub struct Temperature {
value: f32,
}
impl Temperature {
pub fn kelvin(&self) -> f32 {
self.value
}
pub fn celsius(&self) -> f32 {
self.value - 273.15
}
pub fn fahrenheit(&self) -> f32 {
1.8 * self.celsius() + 32.0
}
}
pub fn temperature(info: &CtlInfo, val: &Vec<u8>) -> Result<CtlValue, SysctlError> {
let prec: u32 = {
match info.fmt.len() {
l if l > 2 => match info.fmt[2..3].parse::<u32>() {
Ok(x) if x <= 9 => x,
_ => 1,
},
_ => 1,
}
};
let base = 10u32.pow(prec) as f32;
let make_temp = move |f: f32| -> Result<CtlValue, SysctlError> {
Ok(CtlValue::Temperature(Temperature { value: f / base }))
};
match info.ctl_type {
CtlType::Int => make_temp(byteorder::LittleEndian::read_i32(&val) as f32),
CtlType::S64 => make_temp(byteorder::LittleEndian::read_u64(&val) as f32),
CtlType::Uint => make_temp(byteorder::LittleEndian::read_u32(&val) as f32),
CtlType::Long => make_temp(byteorder::LittleEndian::read_i64(&val) as f32),
CtlType::Ulong => make_temp(byteorder::LittleEndian::read_u64(&val) as f32),
CtlType::U64 => make_temp(byteorder::LittleEndian::read_u64(&val) as f32),
CtlType::U8 => make_temp(val[0] as u8 as f32),
CtlType::U16 => make_temp(byteorder::LittleEndian::read_u16(&val) as f32),
CtlType::S8 => make_temp(val[0] as i8 as f32),
CtlType::S16 => make_temp(byteorder::LittleEndian::read_i16(&val) as f32),
CtlType::S32 => make_temp(byteorder::LittleEndian::read_i32(&val) as f32),
CtlType::U32 => make_temp(byteorder::LittleEndian::read_u32(&val) as f32),
_ => Err(SysctlError::UnknownType),
}
}
#[cfg(all(test, target_os = "freebsd"))]
mod tests_freebsd {
use byteorder::WriteBytesExt;
#[test]
fn ctl_temperature_ik() {
let info = crate::CtlInfo {
ctl_type: crate::CtlType::Int,
fmt: "IK".into(),
flags: 0,
};
let mut val = vec![];
val.write_i32::<byteorder::LittleEndian>(3330)
.expect("Error parsing value to byte array");
let t = super::temperature(&info, &val).unwrap();
if let crate::CtlValue::Temperature(tt) = t {
assert!(tt.kelvin() - 333.0 < 0.1);
assert!(tt.celsius() - 59.85 < 0.1);
assert!(tt.fahrenheit() - 139.73 < 0.1);
} else {
assert!(false);
}
}
#[test]
fn ctl_temperature_ik3() {
let info = crate::CtlInfo {
ctl_type: crate::CtlType::Int,
fmt: "IK3".into(),
flags: 0,
};
let mut val = vec![];
val.write_i32::<byteorder::LittleEndian>(333000)
.expect("Error parsing value to byte array");
let t = super::temperature(&info, &val).unwrap();
if let crate::CtlValue::Temperature(tt) = t {
assert!(tt.kelvin() - 333.0 < 0.1);
} else {
assert!(false);
}
}
}