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//
// Prerequisite :
// - exercise/106_files.zig, or
// - create a file {project_root}/output/zigling.txt
// with content `It's zigling time!`(18 bytes total)
//
// Now there's no point in writing to a file if we don't read from it, am I right?
// Let's write a program to read the content of the file that we just created.
//
// I am assuming that you've created the appropriate files for this to work.
//
// Alright, bud, lean in close. Here's the game plan.
// - First, we open the {project_root}/output/ directory
// - Secondly, we open file `zigling.txt` in that directory
// - Then, we initialize an array of characters with all letter 'A', and print it
// - After that, we read the content of the file into the array
// - Finally, we print out the content we just read
//
// Note: For simplicity, we read byte-by-byte without buffering.
// In real applications, you'd typically use a buffer for better
// performance. We'll learn about buffered I/O in a later exercise.
const std = @import("std");
const io = std.Options.debug_io;
pub fn main() !void {
// Get the current working directory
const cwd = std.Io.Dir.cwd();
// try to open ./output assuming you did your 106_files exercise
var output_dir = try cwd.openDir(io, "output", .{});
defer output_dir.close(io);
// try to open the file
const file = try output_dir.openFile(io, "zigling.txt", .{});
defer file.close(io);
// initialize an array of u8 with all letter 'A'
// we need to pick the size of the array, 64 seems like a good number
// fix the initialization below
var content = ['A']*64;
// this should print out : `AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA`
std.debug.print("{s}\n", .{content});
var file_reader = file.reader(io, &.{});
const reader = &file_reader.interface;
// okay, seems like a threat of violence is not the answer in this case
// can you go here to find a way to read the content?
// https://ziglang.org/documentation/master/std/#std.Io.Reader
// hint: look for a method that reads into a slice
const bytes_read = zig_read_the_file_or_i_will_fight_you(&content);
// Woah, too screamy. I know you're excited for zigling time but tone it down a bit.
// Can you print only what we read from the file?
std.debug.print("Successfully Read {d} bytes: {s}\n", .{
bytes_read,
content, // change this line only
});
}
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