71 lines
1.9 KiB
Rust
71 lines
1.9 KiB
Rust
use {
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r3vi::{
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view::{
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InnerViewPort, OuterViewPort,
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sequence::*,
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},
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buffer::{
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vec::*
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},
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projection::projection_helper::*,
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},
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std::sync::{Arc, RwLock},
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};
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fn posint_add(
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radix: usize,
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a: impl SequenceView<Item = usize>,
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b: impl SequenceView<Item = usize>,
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) -> Vec<usize> {
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let mut carry = 0;
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let mut result = Vec::new();
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for digit_idx in 0..std::cmp::max(a.len().unwrap_or(0), b.len().unwrap_or(0)) {
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let sum = a.get(&digit_idx).unwrap_or(0) + b.get(&digit_idx).unwrap_or(0) + carry;
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result.push(sum % radix);
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carry = if sum > radix { sum - radix } else { 0 };
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}
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if carry > 0 {
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result.push(carry);
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}
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result
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}
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pub struct Add {
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radix: usize,
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a: Arc<dyn SequenceView<Item = usize>>, // PosInt, Little Endian
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b: Arc<dyn SequenceView<Item = usize>>, // PosInt, Little Endian
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c: VecBuffer<usize>,
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_proj_helper: ProjectionHelper<usize, Self>,
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}
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impl Add {
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pub fn new(
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radix: usize,
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a: OuterViewPort<dyn SequenceView<Item = usize>>,
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b: OuterViewPort<dyn SequenceView<Item = usize>>,
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c: InnerViewPort<RwLock<Vec<usize>>>, //<dyn SequenceView<Item = usize>>
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) -> Arc<RwLock<Self>> {
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let mut proj_helper = ProjectionHelper::new(c.0.update_hooks.clone());
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let add = Arc::new(RwLock::new(Add {
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radix,
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a: proj_helper.new_sequence_arg(0, a, |s: &mut Self, _digit_idx| s.update()),
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b: proj_helper.new_sequence_arg(1, b, |s: &mut Self, _digit_idx| s.update()),
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c: VecBuffer::with_port(c),
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_proj_helper: proj_helper,
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}));
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add
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}
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fn update(&mut self) {
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self.c.clear();
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for digit in posint_add(self.radix, self.a.clone(), self.b.clone()) {
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self.c.push(digit);
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}
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}
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}
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