just read all bytes

inputs_test/01

@@ -2,4 +2,3 @@
 pqr3stu8vwx
 a1b2c3d4e5f
 treb7uchet
-

src/main.zig

@@ -16,18 +16,12 @@ pub fn main() !void {
 
 fn day01part1(allocator: std.mem.Allocator, comptime is_test: bool) !void {
     const filename = file_name(is_test, "01");
-    const line_reader = try LineReader.init(allocator, filename);
-    errdefer line_reader.deinit();
+    const buff = try read_file(allocator, filename);
+    defer allocator.free(buff);
+    var lines = std.mem.split(u8, buff, "\n");
 
-    while (true) {
-        const bytes = line_reader.next() catch |err| switch (err) {
-            error.EndOfStream => {
-                break;
-            },
-            else => return err,
-        };
-
-        print("Bytes: {s}\n", .{bytes});
+    while (lines.next()) |line| {
+        print("line! {s}\n", .{line});
     }
 }
 
@@ -37,42 +31,15 @@ fn file_name(comptime is_test: bool, comptime day: []const u8) []const u8 {
     return "inputs" ++ input_suffix ++ day;
 }
 
-const U8ArrayList = std.ArrayList(u8);
+fn read_file(allocator: std.mem.Allocator, filename: []const u8) ![]u8 {
+    const file = try std.fs.cwd().openFile(filename, .{});
+    defer file.close();
 
-const LineReader = struct {
-    allocator: std.mem.Allocator,
-    file: *std.fs.File,
-    line: *U8ArrayList,
-
-    pub fn init(allocator: std.mem.Allocator, filename: []const u8) !LineReader {
-        var file = try std.fs.cwd().openFile(filename, .{ .read = true });
-        var line = std.ArrayList(u8).init(allocator);
-
-        return .{
-            .allocator = allocator,
-            .file = &file,
-            .line = &line,
-        };
+    const stat = try file.stat();
+    const buff = try file.readToEndAlloc(allocator, stat.size);
+    return buff;
 }
 
-    pub fn next(self: LineReader) ![]u8 {
-        // self.line.clearRetainingCapacity();
-        var line = std.ArrayList(u8).init(self.allocator);
-        errdefer line.deinit();
-
-        const reader = self.file.reader();
-        const writer = line.writer();
-
-        try reader.streamUntilDelimiter(writer, '\n', null);
-        return self.line.items;
-    }
-
-    pub fn deinit(self: LineReader) void {
-        self.file.close();
-        self.line.deinit();
-    }
-};
-
 test "simple test" {
     var list = std.ArrayList(i32).init(std.testing.allocator);
     defer list.deinit(); // try commenting this out and see if zig detects the memory leak!