2024: Day 1: use new util.zig

2024/build.zig

@@ -10,23 +10,23 @@ pub fn build(b: *std.Build) void {
 
     var day: u8 = 1;
     while (day <= num_days) : (day += 1) {
-        const str = b.fmt("day{d}", .{day});
-        const file = b.fmt("{s}.zig", .{str});
+        const name = b.fmt("day{d}", .{day});
+        const file = b.fmt("{s}.zig", .{name});
 
         const exe = b.addExecutable(.{
-            .name = str,
+            .name = name,
             .root_source_file = b.path(file),
             .target = target,
             .optimize = optimize,
         });
 
         const install_exe = b.addInstallArtifact(exe, .{});
-        const install_step = b.step(b.fmt("install_{s}", .{str}), b.fmt("Install {s}", .{str}));
+        const install_step = b.step(b.fmt("install_{s}", .{name}), b.fmt("Install {s}", .{name}));
         install_step.dependOn(&install_exe.step);
         install_all.dependOn(&install_exe.step);
 
         const run_exe = b.addRunArtifact(exe);
-        const run_step = b.step(b.fmt("run_{s}", .{str}), b.fmt("Run {s}", .{str}));
+        const run_step = b.step(b.fmt("run_{s}", .{name}), b.fmt("Run {s}", .{name}));
         run_step.dependOn(&run_exe.step);
         run_all.dependOn(&run_exe.step);
     }

2024/day1.zig

@@ -1,16 +1,13 @@
 const std = @import("std");
 const print = std.debug.print;
 
-pub fn main() !void {
-    const file = try std.fs.cwd().openFile("day1.txt", .{});
-    defer file.close();
+const util = @import("util.zig");
 
+pub fn main() !void {
     var gpa = std.heap.GeneralPurposeAllocator(.{}){};
-    defer std.debug.assert(gpa.deinit() == .ok);
     const allocator = gpa.allocator();
 
-    const stat = try file.stat();
-    const input = try file.reader().readAllAlloc(allocator, stat.size);
+    const input = try util.readAllInput(1, allocator);
     defer allocator.free(input);
 
     var l1 = std.ArrayList(i32).init(allocator);