From a27a6df8b4f4700284d2b867642f3b53aedec06c Mon Sep 17 00:00:00 2001
From: Andrew Scott <git@andyscott.me>
Date: Thu, 19 Dec 2024 18:42:09 -0500
Subject: [PATCH] 2024: util.zig: add `inputTo2x2()`

---
 2024/src/util.zig | 20 +++++++++-----------
 1 file changed, 9 insertions(+), 11 deletions(-)

diff --git a/2024/src/util.zig b/2024/src/util.zig
index c8288b3..52deaeb 100644
--- a/2024/src/util.zig
+++ b/2024/src/util.zig
@@ -5,24 +5,22 @@ const TokenIterator = std.mem.TokenIterator;
 // Memory
 var gpa = std.heap.GeneralPurposeAllocator(.{}){};
 pub const alloc = gpa.allocator();
+pub const test_alloc = std.testing.allocator;
 
 // Logging
 pub const log = std.log.default;
 
 // Functions
-pub fn tokenizeAllInput(allocator: Allocator, outputType: type, day: u8) !TokenIterator {
-    var fileName: [16]u8 = undefined;
-    const inputFile = try std.fmt.bufPrint(&fileName, "day{d}.txt", .{day});
+pub fn inputTo2x2(comptime T: type, allocator: Allocator, input: []const T, delimiter: T) !std.ArrayList([]const T) {
+    var out = std.ArrayList([]const T).init(allocator);
+    errdefer out.deinit();
 
-    var dir = try std.fs.cwd().openDir("../data", .{});
-    defer dir.close();
+    var items = std.mem.tokenizeScalar(u8, input, delimiter);
+    while (items.next()) |item| {
+        try out.append(item);
+    }
 
-    const file = try dir.openFile(inputFile, .{});
-    defer file.close();
-
-    const stat = try file.stat();
-    const input = try file.reader().readAllAlloc(allocator, stat.size);
-    return inputToArrayList(outputType, allocator, input);
+    return out;
 }
 
 pub fn readAllInput(day: u8, allocator: std.mem.Allocator) ![]const u8 {