mirror of
https://github.com/HenkKalkwater/aoc-2020
synced 2024-11-22 11:05:18 +00:00
100 lines
2.1 KiB
D
100 lines
2.1 KiB
D
import core.stdc.stdlib;
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import std.conv;
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import std.exception;
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import std.format;
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import std.stdio;
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import std.getopt;
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import std.variant;
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import day1;
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import day2;
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import day3;
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import day4;
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import day5;
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import day6;
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import day7;
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import day8;
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import day9;
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import dayutil;
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immutable string progName = "aoc-2020";
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Variant function(int, File, bool, string[])[] programs = [
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&day1.run,
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&day2.run,
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&day3.run,
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&day4.run,
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&day5.run,
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&day6.run,
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&day7.run,
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&day8.run,
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&day9.run,
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];
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void printUsage(string name) {
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printUsage(name, null);
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}
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void printUsage(string name, string message) {
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stderr.writeln("USAGE: %s [DAY] [PART] <INPUT_FILE> ".format(name));
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stderr.writeln(" DAY = int between 1 and 25 (inclusive), specifiying the day to run");
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stderr.writeln(" PART = int between 1 and 2 (inclusive), specifiying the part to run");
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stderr.writeln(" INPUT_FILE = file to read from. '-' or missing implies stdin");
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if (message != null) {
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stderr.writeln(message);
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}
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exit(-1);
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}
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void main(string[] args) {
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bool bigboy = false;
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int day;
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getopt(args,
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"bigboy", "Execute the so-named 'biboy' variant of this exercise", &bigboy);
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if (args.length < 3) {
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printUsage(args[0]);
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}
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try {
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day = to!int(args[1]);
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} catch (ConvException e) {
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printUsage(args[0], "[day] is not an integer");
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}
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if (day <= 0 || day > programs.length) {
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printUsage(args[0], "[day] must be between 1 and %d".format(programs.length));
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}
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int part;
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try {
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part = to!int(args[2]);
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} catch (ConvException e) {
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printUsage(args[0], "[part] is not an integer");
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}
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File file;
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try {
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if (args.length < 4) {
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if (bigboy) {
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file = File("in/bigboy/%d.txt".format(day), "rb");
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} else {
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file = File("in/%d.txt".format(day), "rb");
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}
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} else if(args[3] == "-") {
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file = stdin;
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} else {
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file = File(args[3], "rb");
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}
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} catch (ErrnoException e) {
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printUsage(args[0], "Error %d while opening input file: %s".format(e.errno, e.message));
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}
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try {
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Variant result = programs[day - 1](part, file, bigboy, args[3..$]);
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writeln(result);
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} catch(ArgumentException e) {
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printUsage(args[0], e.msg);
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}
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}
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