feat: add bytes

bytes/src/main.rs

@@ -0,0 +1,24 @@
+use bytes::{Bytes, BytesMut, Buf, BufMut};
+
+fn main() {
+    println!("Run #test_bytes()");
+    test_bytes();
+    println!("Run #test_bytes_mut()");
+    test_bytes_mut();
+}
+
+fn test_bytes() {
+    let mut buf = Bytes::from(&b"1122334455"[..]);
+    let v1 = buf.get_u16();
+    let v2 = buf.get_u16();
+    println!("v1: {}, v2: {}", v1, v2);
+}
+
+fn test_bytes_mut() {
+    let mut buf = BytesMut::with_capacity(2);
+    println!("[{}], len: {}", hex::encode(buf.bytes()), buf.len());
+    buf.put_u64(112233445566778899);
+    println!("[{}], len: {}", hex::encode(buf.bytes()), buf.len());
+    buf.put_u16(1);
+    println!("[{}], len: {}", hex::encode(buf.bytes()), buf.len());
+}