Refactor azalea-protocol (#190)

* start updating to 1.21.4

* fix block codegen and stop using block data from burger

* rename packet related modules and structs to be simpler

* ItemSlot -> ItemStack for more consistency with mojmap

* .get() -> .into_packet()

* simplify declare_state_packets by removing packet ids

* rename read_from and write_into to azalea_read and azalea_write

* rename McBufReadable and McBufWritable to AzaleaRead and AzaleaWrite

* McBuf -> AzBuf

* remove most uses of into_variant

* update codegen and use resourcelocation names for packets

* implement #[limit(i)] attribute for AzBuf derive macro

* fixes for 1.21.4

* fix examples

* update some physics code and fix ChatType

* remove unused imports in codegen

* re-add some things to migrate.py and update +mc version numbers automatically

* downgrade to 1.21.3 lol

8 files changed, 125 insertions, 136 deletions

diff --git a/azalea-core/src/bitset.rs b/azalea-core/src/bitset.rs
index 0be04a57..e7c79467 100755
--- a/azalea-core/src/bitset.rs
+++ b/azalea-core/src/bitset.rs
@@ -1,9 +1,9 @@
 use std::io::{Cursor, Write};
 
-use azalea_buf::{BufReadError, McBuf, McBufReadable, McBufWritable};
+use azalea_buf::{AzBuf, AzaleaRead, AzaleaWrite, BufReadError};
 
 /// Represents Java's BitSet, a list of bits.
-#[derive(Debug, Clone, PartialEq, Eq, Hash, Default, McBuf)]
+#[derive(Debug, Clone, PartialEq, Eq, Hash, Default, AzBuf)]
 pub struct BitSet {
     data: Vec<u64>,
 }
@@ -159,25 +159,25 @@ where
     }
 }
 
-impl<const N: usize> McBufReadable for FixedBitSet<N>
+impl<const N: usize> AzaleaRead for FixedBitSet<N>
 where
     [u8; N.div_ceil(8)]: Sized,
 {
-    fn read_from(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
+    fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
         let mut data = [0; N.div_ceil(8)];
         for item in data.iter_mut().take(N.div_ceil(8)) {
-            *item = u8::read_from(buf)?;
+            *item = u8::azalea_read(buf)?;
         }
         Ok(FixedBitSet { data })
     }
 }
-impl<const N: usize> McBufWritable for FixedBitSet<N>
+impl<const N: usize> AzaleaWrite for FixedBitSet<N>
 where
     [u8; N.div_ceil(8)]: Sized,
 {
-    fn write_into(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
+    fn azalea_write(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
         for i in 0..N.div_ceil(8) {
-            self.data[i].write_into(buf)?;
+            self.data[i].azalea_write(buf)?;
         }
         Ok(())
     }
diff --git a/azalea-core/src/delta.rs b/azalea-core/src/delta.rs
index 2dd67005..238262a2 100755
--- a/azalea-core/src/delta.rs
+++ b/azalea-core/src/delta.rs
@@ -1,4 +1,4 @@
-pub use azalea_buf::McBuf;
+pub use azalea_buf::AzBuf;
 
 use crate::position::Vec3;
 
@@ -9,7 +9,7 @@ pub trait PositionDeltaTrait {
 }
 
 /// Only works for up to 8 blocks
-#[derive(Clone, Debug, McBuf, Default)]
+#[derive(Clone, Debug, AzBuf, Default)]
 pub struct PositionDelta8 {
     pub xa: i16,
     pub ya: i16,
@@ -49,10 +49,6 @@ impl Vec3 {
         }
     }
 
-    pub fn length_squared(&self) -> f64 {
-        self.x * self.x + self.y * self.y + self.z * self.z
-    }
-
     pub fn normalize(&self) -> Vec3 {
         let length = f64::sqrt(self.x * self.x + self.y * self.y + self.z * self.z);
         if length < 1e-4 {
diff --git a/azalea-core/src/difficulty.rs b/azalea-core/src/difficulty.rs
index 750cfe1f..b907bbb3 100755
--- a/azalea-core/src/difficulty.rs
+++ b/azalea-core/src/difficulty.rs
@@ -3,7 +3,7 @@ use std::{
     io::{Cursor, Write},
 };
 
-use azalea_buf::{BufReadError, McBufReadable, McBufWritable};
+use azalea_buf::{AzaleaRead, AzaleaWrite, BufReadError};
 
 #[derive(Hash, Clone, Copy, Debug, PartialEq, Eq)]
 pub enum Difficulty {
@@ -66,15 +66,15 @@ impl Difficulty {
     }
 }
 
-impl McBufReadable for Difficulty {
-    fn read_from(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
-        Ok(Difficulty::by_id(u8::read_from(buf)?))
+impl AzaleaRead for Difficulty {
+    fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
+        Ok(Difficulty::by_id(u8::azalea_read(buf)?))
     }
 }
 
-impl McBufWritable for Difficulty {
-    fn write_into(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
-        u8::write_into(&self.id(), buf)
+impl AzaleaWrite for Difficulty {
+    fn azalea_write(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
+        u8::azalea_write(&self.id(), buf)
     }
 }
 
diff --git a/azalea-core/src/direction.rs b/azalea-core/src/direction.rs
index 32e1a23a..b0b8c960 100755
--- a/azalea-core/src/direction.rs
+++ b/azalea-core/src/direction.rs
@@ -1,8 +1,8 @@
-use azalea_buf::McBuf;
+use azalea_buf::AzBuf;
 
 use crate::position::Vec3;
 
-#[derive(Clone, Copy, Debug, McBuf, Default, Eq, PartialEq)]
+#[derive(Clone, Copy, Debug, AzBuf, Default, Eq, PartialEq)]
 pub enum Direction {
     #[default]
     Down = 0,
@@ -62,7 +62,7 @@ impl Direction {
 }
 
 // TODO: make azalea_block use this instead of FacingCardinal
-#[derive(Clone, Copy, Debug, McBuf, PartialEq, Eq, Hash)]
+#[derive(Clone, Copy, Debug, AzBuf, PartialEq, Eq, Hash)]
 pub enum CardinalDirection {
     North,
     South,
diff --git a/azalea-core/src/game_type.rs b/azalea-core/src/game_type.rs
index 1e494035..5bac06d5 100644
--- a/azalea-core/src/game_type.rs
+++ b/azalea-core/src/game_type.rs
@@ -1,6 +1,6 @@
 use std::io::{Cursor, Write};
 
-use azalea_buf::{BufReadError, McBufReadable, McBufVarReadable, McBufWritable};
+use azalea_buf::{AzaleaRead, AzaleaReadVar, AzaleaWrite, BufReadError};
 use tracing::debug;
 
 /// A Minecraft gamemode, like survival or creative.
@@ -93,9 +93,9 @@ impl GameMode {
     }
 }
 
-impl McBufReadable for GameMode {
-    fn read_from(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
-        let id = u32::var_read_from(buf)?;
+impl AzaleaRead for GameMode {
+    fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
+        let id = u32::azalea_read_var(buf)?;
         let id = id.try_into().unwrap_or_else(|_| {
             debug!("Unknown game mode id {id}, defaulting to survival");
             0
@@ -107,13 +107,13 @@ impl McBufReadable for GameMode {
     }
 }
 
-impl McBufWritable for GameMode {
-    fn write_into(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
-        u8::write_into(&self.to_id(), buf)
+impl AzaleaWrite for GameMode {
+    fn azalea_write(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
+        u8::azalea_write(&self.to_id(), buf)
     }
 }
 
-/// Rust doesn't let us `impl McBufReadable for Option<GameType>` so we have to
+/// Rust doesn't let us `impl AzaleaRead for Option<GameType>` so we have to
 /// make a new type :(
 #[derive(Hash, Copy, Clone, Debug)]
 pub struct OptionalGameType(pub Option<GameMode>);
@@ -130,15 +130,15 @@ impl From<OptionalGameType> for Option<GameMode> {
     }
 }
 
-impl McBufReadable for OptionalGameType {
-    fn read_from(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
-        let id = i8::read_from(buf)?;
+impl AzaleaRead for OptionalGameType {
+    fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
+        let id = i8::azalea_read(buf)?;
         GameMode::from_optional_id(id).ok_or(BufReadError::UnexpectedEnumVariant { id: id as i32 })
     }
 }
 
-impl McBufWritable for OptionalGameType {
-    fn write_into(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
-        GameMode::to_optional_id(*self).write_into(buf)
+impl AzaleaWrite for OptionalGameType {
+    fn azalea_write(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
+        GameMode::to_optional_id(*self).azalea_write(buf)
     }
 }
diff --git a/azalea-core/src/objectives.rs b/azalea-core/src/objectives.rs
index dd1534f2..a2f0d517 100644
--- a/azalea-core/src/objectives.rs
+++ b/azalea-core/src/objectives.rs
@@ -3,9 +3,9 @@ use std::{
     str::FromStr,
 };
 
-use azalea_buf::McBuf;
+use azalea_buf::AzBuf;
 
-#[derive(Clone, Copy, Debug, McBuf)]
+#[derive(Clone, Copy, Debug, AzBuf)]
 pub enum ObjectiveCriteria {
     Integer,
     Hearts,
diff --git a/azalea-core/src/position.rs b/azalea-core/src/position.rs
index de0276a3..c280a85a 100755
--- a/azalea-core/src/position.rs
+++ b/azalea-core/src/position.rs
@@ -8,11 +8,9 @@ use std::{
     hash::Hash,
     io::{Cursor, Write},
     ops::{Add, AddAssign, Mul, Rem, Sub},
-    str::FromStr,
 };
 
-use azalea_buf::{BufReadError, McBuf, McBufReadable, McBufWritable};
-#[cfg(feature = "serde")]
+use azalea_buf::{AzBuf, AzaleaRead, AzaleaWrite, BufReadError};
 use serde::{Deserialize, Serialize};
 
 use crate::resource_location::ResourceLocation;
@@ -28,25 +26,25 @@ macro_rules! vec3_impl {
             /// Get the distance of this vector to the origin by doing `x^2 + y^2 +
             /// z^2`.
             #[inline]
-            pub fn length_sqr(&self) -> $type {
+            pub fn length_squared(&self) -> $type {
                 self.x * self.x + self.y * self.y + self.z * self.z
             }
 
             /// Get the squared distance from this position to another position.
-            /// Equivalent to `(self - other).length_sqr()`.
+            /// Equivalent to `(self - other).length_squared()`.
             #[inline]
-            pub fn distance_to_sqr(&self, other: &Self) -> $type {
-                (self - other).length_sqr()
+            pub fn distance_squared_to(&self, other: &Self) -> $type {
+                (self - other).length_squared()
             }
 
             #[inline]
-            pub fn horizontal_distance_sqr(&self) -> $type {
+            pub fn horizontal_distance_squared(&self) -> $type {
                 self.x * self.x + self.z * self.z
             }
 
             #[inline]
-            pub fn horizontal_distance_to_sqr(&self, other: &Self) -> $type {
-                (self - other).horizontal_distance_sqr()
+            pub fn horizontal_distance_squared_to(&self, other: &Self) -> $type {
+                (self - other).horizontal_distance_squared()
             }
 
             /// Return a new instance of this position with the y coordinate
@@ -214,7 +212,7 @@ macro_rules! vec3_impl {
 
 /// Used to represent an exact position in the world where an entity could be.
 /// For blocks, [`BlockPos`] is used instead.
-#[derive(Clone, Copy, Debug, Default, PartialEq, McBuf)]
+#[derive(Clone, Copy, Debug, Default, PartialEq, AzBuf)]
 #[cfg_attr(feature = "serde", derive(Deserialize, Serialize))]
 pub struct Vec3 {
     pub x: f64,
@@ -272,6 +270,46 @@ impl BlockPos {
     pub fn length_manhattan(&self) -> u32 {
         (self.x.abs() + self.y.abs() + self.z.abs()) as u32
     }
+
+    /// Make a new BlockPos with the lower coordinates for each axis.
+    ///
+    /// ```
+    /// # use azalea_core::position::BlockPos;
+    /// assert_eq!(
+    ///     BlockPos::min(
+    ///        &BlockPos::new(1, 20, 300),
+    ///        &BlockPos::new(50, 40, 30),
+    ///    ),
+    ///    BlockPos::new(1, 20, 30),
+    /// );
+    /// ```
+    pub fn min(&self, other: &Self) -> Self {
+        Self {
+            x: self.x.min(other.x),
+            y: self.y.min(other.y),
+            z: self.z.min(other.z),
+        }
+    }
+
+    /// Make a new BlockPos with the higher coordinates for each axis.
+    ///
+    /// ```
+    /// # use azalea_core::position::BlockPos;
+    /// assert_eq!(
+    ///    BlockPos::max(
+    ///       &BlockPos::new(1, 20, 300),
+    ///       &BlockPos::new(50, 40, 30),
+    ///   ),
+    ///   BlockPos::new(50, 40, 300),
+    /// );
+    /// ```
+    pub fn max(&self, other: &Self) -> Self {
+        Self {
+            x: self.x.max(other.x),
+            y: self.y.max(other.y),
+            z: self.z.max(other.z),
+        }
+    }
 }
 
 /// Chunk coordinates are used to represent where a chunk is in the world. You
@@ -315,15 +353,15 @@ impl From<u64> for ChunkPos {
         }
     }
 }
-impl McBufReadable for ChunkPos {
-    fn read_from(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
-        let long = u64::read_from(buf)?;
+impl AzaleaRead for ChunkPos {
+    fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
+        let long = u64::azalea_read(buf)?;
         Ok(ChunkPos::from(long))
     }
 }
-impl McBufWritable for ChunkPos {
-    fn write_into(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
-        u64::from(*self).write_into(buf)?;
+impl AzaleaWrite for ChunkPos {
+    fn azalea_write(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
+        u64::from(*self).azalea_write(buf)?;
         Ok(())
     }
 }
@@ -586,9 +624,9 @@ const PACKED_Z_MASK: u64 = (1 << PACKED_Z_LENGTH) - 1;
 const Z_OFFSET: u64 = PACKED_Y_LENGTH;
 const X_OFFSET: u64 = PACKED_Y_LENGTH + PACKED_Z_LENGTH;
 
-impl McBufReadable for BlockPos {
-    fn read_from(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
-        let val = i64::read_from(buf)?;
+impl AzaleaRead for BlockPos {
+    fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
+        let val = i64::azalea_read(buf)?;
         let x = (val << (64 - X_OFFSET - PACKED_X_LENGTH) >> (64 - PACKED_X_LENGTH)) as i32;
         let y = (val << (64 - PACKED_Y_LENGTH) >> (64 - PACKED_Y_LENGTH)) as i32;
         let z = (val << (64 - Z_OFFSET - PACKED_Z_LENGTH) >> (64 - PACKED_Z_LENGTH)) as i32;
@@ -596,18 +634,18 @@ impl McBufReadable for BlockPos {
     }
 }
 
-impl McBufReadable for GlobalPos {
-    fn read_from(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
+impl AzaleaRead for GlobalPos {
+    fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
         Ok(GlobalPos {
-            world: ResourceLocation::read_from(buf)?,
-            pos: BlockPos::read_from(buf)?,
+            world: ResourceLocation::azalea_read(buf)?,
+            pos: BlockPos::azalea_read(buf)?,
         })
     }
 }
 
-impl McBufReadable for ChunkSectionPos {
-    fn read_from(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
-        let long = i64::read_from(buf)?;
+impl AzaleaRead for ChunkSectionPos {
+    fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
+        let long = i64::azalea_read(buf)?;
         Ok(ChunkSectionPos {
             x: (long >> 42) as i32,
             y: (long << 44 >> 44) as i32,
@@ -616,80 +654,35 @@ impl McBufReadable for ChunkSectionPos {
     }
 }
 
-impl McBufWritable for BlockPos {
-    fn write_into(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
+impl AzaleaWrite for BlockPos {
+    fn azalea_write(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
         let mut val: u64 = 0;
         val |= ((self.x as u64) & PACKED_X_MASK) << X_OFFSET;
         val |= (self.y as u64) & PACKED_Y_MASK;
         val |= ((self.z as u64) & PACKED_Z_MASK) << Z_OFFSET;
-        val.write_into(buf)
+        val.azalea_write(buf)
     }
 }
 
-impl McBufWritable for GlobalPos {
-    fn write_into(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
-        ResourceLocation::write_into(&self.world, buf)?;
-        BlockPos::write_into(&self.pos, buf)?;
+impl AzaleaWrite for GlobalPos {
+    fn azalea_write(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
+        ResourceLocation::azalea_write(&self.world, buf)?;
+        BlockPos::azalea_write(&self.pos, buf)?;
 
         Ok(())
     }
 }
 
-impl McBufWritable for ChunkSectionPos {
-    fn write_into(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
+impl AzaleaWrite for ChunkSectionPos {
+    fn azalea_write(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
         let long = (((self.x & 0x3FFFFF) as i64) << 42)
             | (self.y & 0xFFFFF) as i64
             | (((self.z & 0x3FFFFF) as i64) << 20);
-        long.write_into(buf)?;
+        long.azalea_write(buf)?;
         Ok(())
     }
 }
 
-fn parse_three_values<T>(s: &str) -> Result<[T; 3], &'static str>
-where
-    T: FromStr,
-    <T as FromStr>::Err: fmt::Debug,
-{
-    let parts = s.split_whitespace().collect::<Vec<_>>();
-    if parts.len() != 3 {
-        return Err("Expected three values");
-    }
-
-    let x = parts[0].parse().map_err(|_| "Invalid X value")?;
-    let y = parts[1].parse().map_err(|_| "Invalid Y value")?;
-    let z = parts[2].parse().map_err(|_| "Invalid Z value")?;
-
-    Ok([x, y, z])
-}
-
-/// Parses a string in the format "X Y Z" into a BlockPos.
-///
-/// The input string should contain three integer values separated by spaces,
-/// representing the x, y, and z components of the vector respectively.
-/// This can be used to parse user input or from `BlockPos::to_string`.
-impl FromStr for BlockPos {
-    type Err = &'static str;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        let [x, y, z] = parse_three_values::<i32>(s)?;
-        Ok(BlockPos { x, y, z })
-    }
-}
-
-/// Parses a string in the format "X Y Z" into a Vec3.
-///
-/// The input string should contain three floating-point values separated by
-/// spaces, representing the x, y, and z components of the vector respectively.
-/// This can be used to parse user input or from `Vec3::to_string`.
-impl FromStr for Vec3 {
-    type Err = &'static str;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        let [x, y, z] = parse_three_values::<f64>(s)?;
-        Ok(Vec3 { x, y, z })
-    }
-}
-
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -733,9 +726,9 @@ mod tests {
     #[test]
     fn test_read_blockpos_from() {
         let mut buf = Vec::new();
-        13743895338965u64.write_into(&mut buf).unwrap();
+        13743895338965u64.azalea_write(&mut buf).unwrap();
         let mut buf = Cursor::new(&buf[..]);
-        let block_pos = BlockPos::read_from(&mut buf).unwrap();
+        let block_pos = BlockPos::azalea_read(&mut buf).unwrap();
         assert_eq!(block_pos, BlockPos::new(49, -43, -3));
     }
 
@@ -751,9 +744,9 @@ mod tests {
     #[test]
     fn test_read_chunk_pos_from() {
         let mut buf = Vec::new();
-        ChunkPos::new(2, -1).write_into(&mut buf).unwrap();
+        ChunkPos::new(2, -1).azalea_write(&mut buf).unwrap();
         let mut buf = Cursor::new(&buf[..]);
-        let chunk_pos = ChunkPos::from(u64::read_from(&mut buf).unwrap());
+        let chunk_pos = ChunkPos::from(u64::azalea_read(&mut buf).unwrap());
         assert_eq!(chunk_pos, ChunkPos::new(2, -1));
     }
 }
diff --git a/azalea-core/src/resource_location.rs b/azalea-core/src/resource_location.rs
index 7e1e48fe..c95e3109 100755
--- a/azalea-core/src/resource_location.rs
+++ b/azalea-core/src/resource_location.rs
@@ -6,7 +6,7 @@ use std::{
     str::FromStr,
 };
 
-use azalea_buf::{BufReadError, McBufReadable, McBufWritable};
+use azalea_buf::{AzaleaRead, AzaleaWrite, BufReadError};
 #[cfg(feature = "serde")]
 use serde::{de, Deserialize, Deserializer, Serialize, Serializer};
 use simdnbt::{owned::NbtTag, FromNbtTag, ToNbtTag};
@@ -60,15 +60,15 @@ impl FromStr for ResourceLocation {
     }
 }
 
-impl McBufReadable for ResourceLocation {
-    fn read_from(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
-        let location_string = String::read_from(buf)?;
+impl AzaleaRead for ResourceLocation {
+    fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
+        let location_string = String::azalea_read(buf)?;
         Ok(ResourceLocation::new(&location_string))
     }
 }
-impl McBufWritable for ResourceLocation {
-    fn write_into(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
-        self.to_string().write_into(buf)
+impl AzaleaWrite for ResourceLocation {
+    fn azalea_write(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
+        self.to_string().azalea_write(buf)
     }
 }
 
@@ -142,16 +142,16 @@ mod tests {
     }
 
     #[test]
-    fn mcbuf_resource_location() {
+    fn azbuf_resource_location() {
         let mut buf = Vec::new();
         ResourceLocation::new("minecraft:dirt")
-            .write_into(&mut buf)
+            .azalea_write(&mut buf)
             .unwrap();
 
         let mut buf = Cursor::new(&buf[..]);
 
         assert_eq!(
-            ResourceLocation::read_from(&mut buf).unwrap(),
+            ResourceLocation::azalea_read(&mut buf).unwrap(),
             ResourceLocation::new("minecraft:dirt")
         );
     }