Reading a file and counting carriage returns in Zig 0.5.x+master

hello.zig

const std = @import("std");
const os = std.os;
const fs = std.fs;
const File = std.fs.File;

pub fn main() !void {
    const stdout = &std.io.getStdOut().outStream().stream;
    //try stdout.print("Hello, {}!\n", .{"world"});
    var file = try fs.openFileAbsolute("c:\\data\\bigsum.txt", File.OpenFlags{});
    defer file.close();

    var buffer: [128 * 1024]u8 = undefined;
    var count: i32 = 0;

    while (true) {
        const read = try file.read(buffer[0..]);
        if (read == 0) {
            try stdout.print("{}\n", .{count});
            break;
        }
        var i: usize = 0;
        while (i < read) : (i += 1) {
            if (buffer[i] == '\n') {
                count += 1;
            }
        }
        // for (buffer[0..read]) |byte| {
        //     if (byte == '\n') {
        //         count = count + 1;
        //     }
        // }
    }
}