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extern crate libc;
extern crate num_traits;
mod f128_derive;
mod f128_t;
pub mod ffi;
pub use f128_derive::*;
pub use f128_t::*;
#[cfg(test)]
mod tests {
use super::*;
use num_traits::*;
use std::num::FpCategory;
#[test]
fn test_minus() {
let a = f128::from_f64(-4.).unwrap();
assert_eq!(a.is_finite(), true);
assert_eq!(a.is_infinite(), false);
assert_eq!(a.is_sign_negative(), true);
assert_eq!(a.is_sign_positive(), false);
assert_eq!(a.signum(), -f128::ONE);
let a = f128::from_f64(4.).unwrap();
assert_eq!(a.is_finite(), true);
assert_eq!(a.is_infinite(), false);
assert_eq!(a.is_sign_negative(), false);
assert_eq!(a.is_sign_positive(), true);
assert_eq!(a.signum(), f128::ONE);
}
#[test]
fn test_constants() {
let pi = f128::parse("3.1415926535897932384626433832795028841971693993751058").unwrap();
let e = f128::parse("2.7182818284590452353602874713526624977572").unwrap();
let one = f128::parse("1.0").unwrap();
let two = f128::parse("2.0").unwrap();
assert!(pi.bitwise_eq(f128::PI));
assert!(e.bitwise_eq(f128::E));
assert!(one.bitwise_eq(f128::ONE));
assert!(two.bitwise_eq(f128::TWO));
assert!(f128::NAN.is_nan());
assert!(!f128::NAN.is_finite());
assert!(!f128::NAN.is_infinite());
assert!(f128::INFINITY.is_infinite());
assert!(!f128::INFINITY.is_finite());
assert!(f128::NEG_INFINITY.is_infinite());
assert!(!f128::NEG_INFINITY.is_finite());
}
#[test]
fn test_classify() {
let pi = f128::PI;
let one = f128::ONE;
let half = f128::parse("0.5").unwrap();
let zero = f128::from_u8(0).unwrap();
let min = f128::MIN_POSITIVE;
assert_eq!(half.classify(), FpCategory::Normal);
assert_eq!(one.classify(), FpCategory::Normal);
assert_eq!(pi.classify(), FpCategory::Normal);
assert_eq!(min.classify(), FpCategory::Subnormal);
assert_eq!(f128::INFINITY.classify(), FpCategory::Infinite);
assert_eq!(f128::NEG_INFINITY.classify(), FpCategory::Infinite);
assert_eq!(f128::NAN.classify(), FpCategory::Nan);
}
#[test]
fn test_f128_to_primitive() {
let a = f128::parse("1003.0").unwrap();
assert_eq!(1003i64, a.to_i64().unwrap());
assert_eq!(1003u64, a.to_u64().unwrap());
assert_eq!(1003i128, a.to_i128().unwrap());
assert_eq!(1003u128, a.to_u128().unwrap());
}
#[test]
fn test_conversions() {
assert!(f128::from_u128(123456789)
.unwrap()
.bitwise_eq(f128::parse("123456789.0").unwrap()));
assert!(f128::from_i128(5i128)
.unwrap()
.bitwise_eq(f128::parse("5.0").unwrap()));
assert!(f128::from_i64(-64)
.unwrap()
.bitwise_eq(f128::parse("-64.0").unwrap()));
assert!(f128::from_u64(10_000_000)
.unwrap()
.bitwise_eq(f128::parse("10000000.0").unwrap()));
assert!(f128::from_i32(5i32)
.unwrap()
.bitwise_eq(f128::parse("5.0").unwrap()));
assert!(f128::from_u32(0)
.unwrap()
.bitwise_eq(f128::parse("0.0").unwrap()));
assert!(f128::from_u16(32000)
.unwrap()
.bitwise_eq(f128::parse("32000.0").unwrap()));
assert!(f128::from_i16(-30000)
.unwrap()
.bitwise_eq(f128::parse("-30000.0").unwrap()));
assert!(f128::from_i8(-100)
.unwrap()
.bitwise_eq(f128::parse("-100.0").unwrap()));
assert!(f128::from_u8(255)
.unwrap()
.bitwise_eq(f128::parse("255.0").unwrap()));
}
#[test]
fn test_to_string() {
assert_eq!(f128::infinity().to_string().as_str(), "inf");
assert_eq!(f128::neg_infinity().to_string().as_str(), "-inf");
assert_eq!(f128::nan().to_string().as_str(), "nan");
assert_eq!(f128::neg_zero().to_string().as_str(), "-0");
assert_eq!(f128::zero().to_string().as_str(), "0");
}
macro_rules! assert_approx_eq {
($a:expr, $b:expr, $epsilon:expr) => {
assert!(($a - $b).abs() < $epsilon)
};
}
const EPSILON: f128 = f128::EPSILON;
#[test]
fn test_casts_to_f128() {
let thirty = f128::parse("30").unwrap();
let nthirty = f128::parse("-30").unwrap();
let oneandhalf = f128::parse("1.5").unwrap();
assert_approx_eq!(oneandhalf, f128::from_f64(1.5).unwrap(), EPSILON);
assert_approx_eq!(oneandhalf, f128::from_f32(1.5).unwrap(), EPSILON);
assert_approx_eq!(thirty, f128::from_u64(30).unwrap(), EPSILON);
assert_approx_eq!(nthirty, f128::from_i64(-30).unwrap(), EPSILON);
assert_approx_eq!(thirty, f128::from_u32(30).unwrap(), EPSILON);
assert_approx_eq!(nthirty, f128::from_i32(-30).unwrap(), EPSILON);
assert_approx_eq!(thirty, f128::from_u16(30).unwrap(), EPSILON);
assert_approx_eq!(nthirty, f128::from_i16(-30).unwrap(), EPSILON);
assert_approx_eq!(thirty, f128::from_u8(30).unwrap(), EPSILON);
assert_approx_eq!(nthirty, f128::from_i8(-30).unwrap(), EPSILON);
}
#[test]
fn test_casts_from_f128() {
use std::{f32, f64};
let oneandhalf = f128::parse("1.6").unwrap();
assert_approx_eq!(1.6f64, oneandhalf.to_f64().unwrap(), f64::EPSILON);
assert_approx_eq!(1.6f32, oneandhalf.to_f32().unwrap(), f32::EPSILON);
assert_eq!(1i32, oneandhalf.to_i32().unwrap());
assert_eq!(1u32, oneandhalf.to_u32().unwrap());
assert_eq!(1i64, oneandhalf.to_i64().unwrap());
assert_eq!(1u64, oneandhalf.to_u64().unwrap());
assert_eq!(1i16, oneandhalf.to_i16().unwrap());
assert_eq!(1u16, oneandhalf.to_u16().unwrap());
assert_eq!(1i8, oneandhalf.to_i8().unwrap());
assert_eq!(1u8, oneandhalf.to_u8().unwrap());
}
#[test]
fn test_cmp() {
let a = f128::parse("1.5").unwrap();
let c = f128::parse("1.5").unwrap();
let b = f128::parse("3.0").unwrap();
assert!(a == c);
assert!(a < b);
assert!(a <= b);
assert!(b > a);
assert!(b >= a);
assert!(a != b);
}
}