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Fix sign function for NaN.

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This commit is contained in:
Stephen Chung 2021-09-14 22:33:10 +08:00
parent 5ac33ce64d
commit 08155c0978
1 changed files with 17 additions and 17 deletions
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34
src/packages/arithmetic.rs
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@ -163,13 +163,7 @@ macro_rules! gen_signed_functions {
}
}
pub fn sign(x: $arg_type) -> INT {
if x == 0 {
0
} else if x < 0 {
-1
} else {
1
}
x.signum() as INT
}
}
})* }
@ -249,6 +243,8 @@ gen_signed_functions!(signed_num_128 => i128);
#[cfg(not(feature = "no_float"))]
#[export_module]
mod f32_functions {
use crate::EvalAltResult;
#[cfg(not(feature = "f32_float"))]
pub mod basic_arithmetic {
#[rhai_fn(name = "+")]
@ -329,13 +325,15 @@ mod f32_functions {
pub fn abs(x: f32) -> f32 {
x.abs()
}
pub fn sign(x: f32) -> INT {
#[rhai_fn(return_raw)]
pub fn sign(x: f32) -> Result<INT, Box<EvalAltResult>> {
if x == 0.0 {
0
} else if x < 0.0 {
-1
Ok(0)
} else {
1
match x.signum() {
x if x.is_nan() => Err(make_err("Sign of NaN is undefined")),
x => Ok(x as INT),
}
}
}
pub fn is_zero(x: f32) -> bool {
@ -437,13 +435,15 @@ mod f64_functions {
pub fn abs(x: f64) -> f64 {
x.abs()
}
pub fn sign(x: f64) -> INT {
#[rhai_fn(return_raw)]
pub fn sign(x: f64) -> Result<INT, Box<EvalAltResult>> {
if x == 0.0 {
0
} else if x < 0.0 {
-1
Ok(0)
} else {
1
match x.signum() {
x if x.is_nan() => Err(make_err("Sign of NaN is undefined")),
x => Ok(x as INT),
}
}
}
pub fn is_zero(x: f64) -> bool {