adventofcode

day1.ha (993B)

// SPDX-FileCopyrightText: 2023 Haelwenn (lanodan) Monnier <contact+aoc2023@hacktivis.me>
// SPDX-License-Identifier: MIT
use bufio;
use strings;
use ascii;
use fmt;
use os;
use io;
export fn main() void = {
	let total = 0u32;
	for(true) {
		const line = match(bufio::scanline(os::stdin)) {
		case let l: []u8 => yield l;
		case io::EOF => break;
		case => abort();
		};
		const line = strings::fromutf8(line)!;
		let val = 0u32;
		let iter = strings::iter(line);
		for(true) {
			match(strings::next(&iter)) {
			case let c: rune =>
				if(ascii::isdigit(c)) {
					let c = c: u32;
					val = (c - '0')*10;
					break;
				};
			case =>
				abort();
			};
		};
		let iter = strings::riter(line);
		for(true) {
			match(strings::next(&iter)) {
			case let c: rune =>
				if(ascii::isdigit(c)) {
					let c = c: u32;
					val += (c - '0');
					break;
				};
			case =>
				abort();
			};
		};
		fmt::printfln("= {}", val)!;
		total += val;
	};
	fmt::printfln("Total: {}", total)!;
};