88 lines
2.8 KiB
Rust
88 lines
2.8 KiB
Rust
/* OpenTally: Open-source election vote counting
|
|
* Copyright © 2021 Lee Yingtong Li (RunasSudo)
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License
|
|
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/// Fixed-point arithmetic (using `ibig`)
|
|
mod fixed;
|
|
/// Guarded fixed-point arithmetic (using `ibig`)
|
|
mod gfixed;
|
|
/// Native 64-bit floating point arithmetic
|
|
mod native;
|
|
|
|
/// Exact rational arithmetic (using `rug`/GMP)
|
|
#[cfg(not(target_arch = "wasm32"))]
|
|
mod rational_rug;
|
|
|
|
/// Exact rational arithmetic (using `num-bigint`)
|
|
//#[cfg(target_arch = "wasm32")]
|
|
mod rational_num;
|
|
|
|
use num_traits::{NumAssignRef, NumRef};
|
|
|
|
use std::cmp::Ord;
|
|
use std::fmt;
|
|
use std::ops;
|
|
|
|
/// Assign value, avoiding additional allocations
|
|
pub trait Assign<Src=Self> {
|
|
/// Set the value of `self` to the value of `src`, avoiding additional allocations
|
|
fn assign(&mut self, src: Src);
|
|
}
|
|
|
|
/// Trait for OpenTally numeric representations
|
|
//pub trait Number: NumRef + NumAssignRef + PartialOrd + Assign + Clone + fmt::Display where for<'a> &'a Self: RefNum<&'a Self> {
|
|
pub trait Number:
|
|
NumRef + NumAssignRef + ops::Neg<Output=Self> + Ord + Assign + From<usize> + Clone + fmt::Debug + fmt::Display
|
|
where
|
|
for<'a> Self: Assign<&'a Self>,
|
|
{
|
|
/// Return a new [Number]
|
|
fn new() -> Self;
|
|
|
|
/// Convert to CLI argument representation
|
|
fn describe() -> String;
|
|
/// Convert to CLI argument representation, returning an empty string if the default
|
|
fn describe_opt() -> String { Self::describe() }
|
|
|
|
/// Exponentiate `self` to the `exponent` power
|
|
fn pow_assign(&mut self, exponent: i32);
|
|
/// Round `self` down if necessary to `dps` decimal places
|
|
fn floor_mut(&mut self, dps: usize);
|
|
/// Round `self` up if necessary to `dps` decimal places
|
|
fn ceil_mut(&mut self, dps: usize);
|
|
/// Round `self` half-up to the nearest `dps` decimal places
|
|
fn round_mut(&mut self, dps: usize);
|
|
|
|
/// Parse the given string into a [Number]
|
|
fn parse(s: &str) -> Self {
|
|
if let Ok(value) = Self::from_str_radix(s, 10) {
|
|
return value;
|
|
} else {
|
|
panic!("Syntax Error");
|
|
}
|
|
}
|
|
}
|
|
|
|
pub use self::fixed::Fixed;
|
|
pub use self::gfixed::GuardedFixed;
|
|
pub use self::native::NativeFloat64;
|
|
|
|
#[cfg(not(target_arch = "wasm32"))]
|
|
pub use self::rational_rug::Rational;
|
|
|
|
#[cfg(target_arch = "wasm32")]
|
|
pub use self::rational_num::Rational;
|