1 files changed, 56 insertions, 0 deletions
diff --git a/azalea-buf/src/definitions.rs b/azalea-buf/src/definitions.rs
new file mode 100644
index 00000000..921fb63d
--- /dev/null
+++ b/azalea-buf/src/definitions.rs
@@ -0,0 +1,56 @@
+use crate::{McBufReadable, McBufWritable};
+use std::{
+    io::{Read, Write},
+    ops::Deref,
+};
+
+/// A Vec<u8> that isn't prefixed by a VarInt with the size.
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct UnsizedByteArray(Vec<u8>);
+
+impl Deref for UnsizedByteArray {
+    type Target = Vec<u8>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl From<Vec<u8>> for UnsizedByteArray {
+    fn from(vec: Vec<u8>) -> Self {
+        Self(vec)
+    }
+}
+
+impl From<&str> for UnsizedByteArray {
+    fn from(s: &str) -> Self {
+        Self(s.as_bytes().to_vec())
+    }
+}
+
+/// Represents Java's BitSet, a list of bits.
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct BitSet {
+    data: Vec<u64>,
+}
+
+// the Index trait requires us to return a reference, but we can't do that
+impl BitSet {
+    pub fn index(&self, index: usize) -> bool {
+        (self.data[index / 64] & (1u64 << (index % 64))) != 0
+    }
+}
+
+impl McBufReadable for BitSet {
+    fn read_into(buf: &mut impl Read) -> Result<Self, String> {
+        Ok(Self {
+            data: Vec::<u64>::read_into(buf)?,
+        })
+    }
+}
+
+impl McBufWritable for BitSet {
+    fn write_into(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
+        self.data.write_into(buf)
+    }
+}