55 lines
1.4 KiB
Rust
55 lines
1.4 KiB
Rust
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use std::ops::{Mul, MulAssign};
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use super::{Number, Sign};
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impl Mul for Number {
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type Output = Self;
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fn mul(self, rhs: Self) -> Self::Output {
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let multiplied = self.digits.iter().rev().enumerate().map(|(pos, &digit)| {
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let mut mult = digit * rhs.clone();
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mult.digits = [mult.digits, vec![0; pos]].concat();
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mult
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});
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let mut overflown_number = multiplied.reduce(|acc, num| acc + num).unwrap();
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overflown_number.handle_overflows();
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overflown_number
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}
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}
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impl Mul<Number> for isize {
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type Output = Number;
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fn mul(self, rhs: Number) -> Self::Output {
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let multiplied = rhs.digits.iter().map(|digit| digit * self).collect();
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let mut overflown_number = Number {
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digits: multiplied,
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sign: Sign::Positif,
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};
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overflown_number.handle_overflows();
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overflown_number
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}
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}
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impl Mul<isize> for Number {
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type Output = Self;
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fn mul(self, rhs: isize) -> Self::Output {
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let multiplied = self.digits.iter().map(|digit| digit * rhs).collect();
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let mut overflown_number = Self {
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digits: multiplied,
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sign: Sign::Positif,
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};
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overflown_number.handle_overflows();
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overflown_number
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}
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}
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impl MulAssign for Number {
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fn mul_assign(&mut self, rhs: Self) {
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let new = self.clone() * rhs;
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self.digits = new.digits;
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self.sign = new.sign;
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}
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}
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