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use std::io::Write;
use std::{fs::File, io::BufWriter};
pub struct FileWriter
{
buf_writer: BufWriter<File>
}
impl FileWriter
{
pub fn new(buf_writer: BufWriter<File>) -> Self
{
Self
{
buf_writer
}
}
pub fn write_zeros(&mut self, c: usize)
{
for _ in 0..c
{
self.write(0 as u8);
}
// self.buf_writer.write_all(&[0u8; c]).expect("Could not write 0s");
}
pub fn write_array<const N: usize, T: ToBytes<N>, const C: usize>(&mut self, xs: [T; C])
{
for x in xs
{
self.write(x);
}
}
pub fn write<const N: usize, T: ToBytes<N>>(&mut self, x: T)
{
let data = x.to_le_bytes();
self.buf_writer.write_all(&data).expect("Could not write");
}
pub fn flush(&mut self)
{
self.buf_writer.flush().expect("Could not flush");
}
}
pub trait ToBytes<const N: usize>: Sized + Copy
{
fn to_le_bytes(&self) -> [u8; N];
}
impl ToBytes<4> for u32
{
fn to_le_bytes(&self) -> [u8; 4] {
u32::to_le_bytes(*self)
}
}
impl ToBytes<2> for u16
{
fn to_le_bytes(&self) -> [u8; 2] {
u16::to_le_bytes(*self)
}
}
impl ToBytes<1> for u8
{
fn to_le_bytes(&self) -> [u8; 1] {
u8::to_le_bytes(*self)
}
}
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