Add README LICENSE and setup encode & decode trait

6 files changed, 31 insertions, 14 deletions

diff --git a/src/codec.rs b/src/codec.rs
new file mode 100644
index 0000000..f11a88e
--- /dev/null
+++ b/src/codec.rs
@@ -0,0 +1,7 @@
+use crate::codec::{decode::Decode, encode::Encode};
+
+pub mod decode;
+pub mod encode;
+
+pub trait Codec: Encode + Decode {}
+impl<T> Codec for T where T: Encode + Decode {}
diff --git a/src/codec/decode.rs b/src/codec/decode.rs
new file mode 100644
index 0000000..65f08b5
--- /dev/null
+++ b/src/codec/decode.rs
@@ -0,0 +1,7 @@
+use std::io::{self, Read};
+
+pub trait Decode {
+    fn decode(reader: &impl Read) -> io::Result<Self>
+    where
+        Self: Sized;
+}
diff --git a/src/codec/encode.rs b/src/codec/encode.rs
new file mode 100644
index 0000000..f23913b
--- /dev/null
+++ b/src/codec/encode.rs
@@ -0,0 +1,6 @@
+use std::io::{self, Write};
+
+pub trait Encode {
+    fn encode(&self, write: &mut dyn Write) -> io::Result<usize>;
+    fn encoded_size(&self) -> Option<usize>;
+}
diff --git a/src/lib.rs b/src/lib.rs
index b93cf3f..8ffd97a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,14 +1,2 @@
-pub fn add(left: u64, right: u64) -> u64 {
-    left + right
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn it_works() {
-        let result = add(2, 2);
-        assert_eq!(result, 4);
-    }
-}
+pub mod codec;
+pub mod types;
diff --git a/src/types/mod.rs b/src/types/mod.rs
new file mode 100644
index 0000000..5a68507
--- /dev/null
+++ b/src/types/mod.rs
@@ -0,0 +1 @@
+pub mod prefix;
diff --git a/src/types/prefix.rs b/src/types/prefix.rs
new file mode 100644
index 0000000..e60c23b
--- /dev/null
+++ b/src/types/prefix.rs
@@ -0,0 +1,8 @@
+use std::marker::PhantomData;
+
+use crate::codec::Codec;
+
+pub struct LenPrefixed<L: Codec, D: Codec> {
+    data: D,
+    _len: PhantomData<L>,
+}