Read input into a Matrix

day16/src/day16.zig

@@ -3,20 +3,37 @@ const std = @import("std");
 const allocator = std.heap.page_allocator;
 const stdout = std.io.getStdOut().writer();
 
+const String = []u8;
+const Matrix = std.ArrayList(String);
+
 pub fn main() !u8 {
  var args = try std.process.argsAlloc(allocator);
  if (args.len <= 1) {
  try stdout.print("Usage: {s} <path to input>\n", .{args[0]});
  return 1;
  }
 
- var buf: [1024]u8 = undefined;
+ var matrix = Matrix.init(allocator);
+ defer matrix.deinit();
+
+ var buffer: [1024]u8 = undefined;
  var file = try std.fs.cwd().openFile(args[1], .{});
  var bufReader = std.io.bufferedReader(file.reader());
  var reader = bufReader.reader();
  defer file.close();
 
- while (try reader.readUntilDelimiterOrEof(&buf, '\n')) |line| {
+ while (try reader.readUntilDelimiterOrEof(&buffer, '\n')) |bufLine| {
+ const line = try allocator.dupeZ(u8, bufLine);
+ try matrix.append(line);
+ }
+
+ defer {
+ for (matrix.items) |line| {
+ allocator.free(line);
+ }
+ }
+
+ for (matrix.items) |line| {
  try stdout.print("{s}\n", .{line});
  }