feat: Initial commit

1 files changed, 56 insertions, 0 deletions

diff --git a/src/reader.rs b/src/reader.rs
new file mode 100644
index 0000000..affd2da
--- /dev/null
+++ b/src/reader.rs
@@ -0,0 +1,56 @@
+use std::{fs::File, io::{BufReader, Read}};
+
+pub struct FileReader<const BUFF_SIZE: usize = 1024>
+{
+	buf_reader: BufReader<File>
+}
+
+impl<const BUFF_SIZE: usize> FileReader<BUFF_SIZE> {
+    pub fn new(buf_reader: BufReader<File>) -> Self
+	{
+        Self
+		{
+			buf_reader
+		}
+    }
+
+	pub fn skip(&mut self, c: usize)
+	{
+		self.buf_reader.seek_relative(c as i64).expect("Cannot seek!");
+	}
+	pub fn read_array<const N: usize, T: FromBytes<N> + Sized, const C: usize>(&mut self) -> [T; C]
+	{
+		std::array::from_fn(|_| self.read())
+	}
+
+	pub fn read<const N: usize, T: FromBytes<N> + Sized>(&mut self) -> T
+	{
+		let mut data = [0u8; N];
+		self.buf_reader.read_exact(&mut data).expect("Bad read");
+		T::from_le_bytes(&data)
+	}
+}
+
+pub trait FromBytes<const N: usize>: Sized
+{
+	fn from_le_bytes(buffer: &[u8; N]) -> Self;
+}
+
+impl FromBytes<4> for u32
+{
+    fn from_le_bytes(buffer: &[u8; 4]) -> Self {
+		u32::from_le_bytes(*buffer)
+    }
+}
+impl FromBytes<2> for u16
+{
+    fn from_le_bytes(buffer: &[u8; 2]) -> Self {
+		u16::from_le_bytes(*buffer)
+    }
+}
+impl FromBytes<1> for u8
+{
+    fn from_le_bytes(buffer: &[u8; 1]) -> Self {
+		u8::from_le_bytes(*buffer)
+    }
+}