start improving packet macros

1 files changed, 163 insertions, 0 deletions

diff --git a/azalea-protocol/src/mc_buf/mod.rs b/azalea-protocol/src/mc_buf/mod.rs
new file mode 100644
index 00000000..a924431e
--- /dev/null
+++ b/azalea-protocol/src/mc_buf/mod.rs
@@ -0,0 +1,163 @@
+//! Utilities for reading and writing for the Minecraft protocol
+
+mod read;
+mod write;
+
+pub use read::{McBufReadable, McBufVarintReadable, Readable};
+pub use write::{McBufVarintWritable, McBufWritable, Writable};
+
+// const DEFAULT_NBT_QUOTA: u32 = 2097152;
+const MAX_STRING_LENGTH: u16 = 32767;
+// const MAX_COMPONENT_STRING_LENGTH: u32 = 262144;
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use azalea_core::resource_location::ResourceLocation;
+    use std::{collections::HashMap, io::Cursor};
+    use tokio::io::BufReader;
+
+    #[test]
+    fn test_write_varint() {
+        let mut buf = Vec::new();
+        buf.write_varint(123456).unwrap();
+        assert_eq!(buf, vec![192, 196, 7]);
+
+        let mut buf = Vec::new();
+        buf.write_varint(0).unwrap();
+        assert_eq!(buf, vec![0]);
+    }
+
+    #[tokio::test]
+    async fn test_read_varint() {
+        let mut buf = BufReader::new(Cursor::new(vec![192, 196, 7]));
+        assert_eq!(buf.read_varint().await.unwrap(), 123456);
+        assert_eq!(buf.get_varint_size(123456), 3);
+
+        let mut buf = BufReader::new(Cursor::new(vec![0]));
+        assert_eq!(buf.read_varint().await.unwrap(), 0);
+        assert_eq!(buf.get_varint_size(0), 1);
+
+        let mut buf = BufReader::new(Cursor::new(vec![1]));
+        assert_eq!(buf.read_varint().await.unwrap(), 1);
+        assert_eq!(buf.get_varint_size(1), 1);
+    }
+
+    #[tokio::test]
+    async fn test_read_varint_longer() {
+        let mut buf = BufReader::new(Cursor::new(vec![138, 56, 0, 135, 56, 123]));
+        assert_eq!(buf.read_varint().await.unwrap(), 7178);
+    }
+
+    #[tokio::test]
+    async fn test_list() {
+        let mut buf = Vec::new();
+        buf.write_list(&vec!["a", "bc", "def"], |buf, s| buf.write_utf(s))
+            .unwrap();
+
+        // there's no read_list because idk how to do it in rust
+        let mut buf = BufReader::new(Cursor::new(buf));
+
+        let mut result = Vec::new();
+        let length = buf.read_varint().await.unwrap();
+        for _ in 0..length {
+            result.push(buf.read_utf().await.unwrap());
+        }
+
+        assert_eq!(result, vec!["a", "bc", "def"]);
+    }
+
+    #[tokio::test]
+    async fn test_int_id_list() {
+        let mut buf = Vec::new();
+        buf.write_list(&vec![1, 2, 3], |buf, i| buf.write_varint(*i))
+            .unwrap();
+
+        let mut buf = BufReader::new(Cursor::new(buf));
+
+        let result = buf.read_int_id_list().await.unwrap();
+        assert_eq!(result, vec![1, 2, 3]);
+    }
+
+    #[tokio::test]
+    async fn test_map() {
+        let mut buf = Vec::new();
+        buf.write_map(
+            vec![("a", 1), ("bc", 23), ("def", 456)],
+            Vec::write_utf,
+            Vec::write_varint,
+        )
+        .unwrap();
+
+        let mut buf = BufReader::new(Cursor::new(buf));
+
+        let mut result = Vec::new();
+        let length = buf.read_varint().await.unwrap();
+        for _ in 0..length {
+            result.push((
+                buf.read_utf().await.unwrap(),
+                buf.read_varint().await.unwrap(),
+            ));
+        }
+
+        assert_eq!(
+            result,
+            vec![
+                ("a".to_string(), 1),
+                ("bc".to_string(), 23),
+                ("def".to_string(), 456)
+            ]
+        );
+    }
+
+    #[tokio::test]
+    async fn test_nbt() {
+        let mut buf = Vec::new();
+        buf.write_nbt(&azalea_nbt::Tag::Compound(HashMap::from_iter(vec![(
+            "hello world".to_string(),
+            azalea_nbt::Tag::Compound(HashMap::from_iter(vec![(
+                "name".to_string(),
+                azalea_nbt::Tag::String("Bananrama".to_string()),
+            )])),
+        )])))
+        .unwrap();
+
+        let mut buf = BufReader::new(Cursor::new(buf));
+
+        let result = buf.read_nbt().await.unwrap();
+        assert_eq!(
+            result,
+            azalea_nbt::Tag::Compound(HashMap::from_iter(vec![(
+                "hello world".to_string(),
+                azalea_nbt::Tag::Compound(HashMap::from_iter(vec![(
+                    "name".to_string(),
+                    azalea_nbt::Tag::String("Bananrama".to_string()),
+                )])),
+            )]))
+        );
+    }
+
+    #[tokio::test]
+    async fn test_long() {
+        let mut buf = Vec::new();
+        buf.write_long(123456).unwrap();
+
+        let mut buf = BufReader::new(Cursor::new(buf));
+
+        assert_eq!(buf.read_long().await.unwrap(), 123456);
+    }
+
+    #[tokio::test]
+    async fn test_resource_location() {
+        let mut buf = Vec::new();
+        buf.write_resource_location(&ResourceLocation::new("minecraft:dirt").unwrap())
+            .unwrap();
+
+        let mut buf = BufReader::new(Cursor::new(buf));
+
+        assert_eq!(
+            buf.read_resource_location().await.unwrap(),
+            ResourceLocation::new("minecraft:dirt").unwrap()
+        );
+    }
+}