Add bitfield decoder

protocol-derive/tests/bitfield_abilities.rs

@@ -0,0 +1,60 @@
+#[macro_use]
+extern crate minecraft_protocol_derive;
+
+use minecraft_protocol::decoder::Decoder;
+use minecraft_protocol::encoder::Encoder;
+use minecraft_protocol::error::{DecodeError, EncodeError};
+
+#[derive(Packet)]
+pub struct Abilities {
+    #[packet(bitfield(size = 4))]
+    pub _unused: u8,
+    #[packet(bitfield(size = 1))]
+    pub creative_mode: bool,
+    #[packet(bitfield(size = 1))]
+    pub allow_flying: bool,
+    #[packet(bitfield(size = 1))]
+    pub flying: bool,
+    #[packet(bitfield(size = 1))]
+    pub invulnerable: bool,
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::Abilities;
+    use minecraft_protocol::decoder::Decoder;
+    use minecraft_protocol::encoder::Encoder;
+    use minecraft_protocol::error::{DecodeError, EncodeError};
+    use std::io::Cursor;
+
+    #[test]
+    fn test_encode_abilities_i8_bitfield() {
+        let abilities = Abilities {
+            _unused: 0,
+            creative_mode: true,
+            allow_flying: true,
+            flying: true,
+            invulnerable: true,
+        };
+        let mut vec = Vec::new();
+
+        abilities
+            .encode(&mut vec)
+            .expect("Failed to encode abilities");
+        assert_eq!(vec, [15]);
+    }
+
+    #[test]
+    fn test_decode_abilities_i8_bitfield() {
+        let value = 15i8;
+
+        let vec = value.to_be_bytes().to_vec();
+        let mut cursor = Cursor::new(vec);
+
+        let abilities = Abilities::decode(&mut cursor).expect("Failed to decode abilities");
+        assert!(abilities.invulnerable);
+        assert!(abilities.flying);
+        assert!(abilities.allow_flying);
+        assert!(abilities.creative_mode);
+    }
+}

protocol-derive/tests/bitfield_half.rs

@@ -0,0 +1,107 @@
+#[macro_use]
+extern crate minecraft_protocol_derive;
+
+use minecraft_protocol::decoder::Decoder;
+use minecraft_protocol::encoder::Encoder;
+use minecraft_protocol::error::{DecodeError, EncodeError};
+
+#[derive(Packet)]
+pub struct HalfLong {
+    #[packet(bitfield(size = 32))]
+    pub _unused: u32,
+    #[packet(bitfield(size = 32))]
+    pub value: u32,
+}
+
+#[derive(Packet)]
+pub struct HalfInt {
+    #[packet(bitfield(size = 16))]
+    pub _unused: u16,
+    #[packet(bitfield(size = 16))]
+    pub value: u16,
+}
+
+#[derive(Packet)]
+pub struct HalfShort {
+    #[packet(bitfield(size = 8))]
+    pub _unused: u8,
+    #[packet(bitfield(size = 8))]
+    pub value: u8,
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::{HalfInt, HalfLong, HalfShort};
+    use minecraft_protocol::decoder::Decoder;
+    use minecraft_protocol::encoder::Encoder;
+    use minecraft_protocol::error::{DecodeError, EncodeError};
+    use std::io::Cursor;
+
+    #[test]
+    fn test_encode_half_long_u64_bitfield() {
+        let half = HalfLong {
+            _unused: 0,
+            value: u32::MAX,
+        };
+        let mut vec = Vec::new();
+
+        half.encode(&mut vec).expect("Failed to encode half");
+        assert_eq!(vec, u32::MAX.to_be_bytes().to_vec());
+    }
+
+    #[test]
+    fn test_decode_half_long_u64_bitfield() {
+        let value = u32::MAX as u64;
+
+        let vec = value.to_be_bytes().to_vec();
+        let mut cursor = Cursor::new(vec);
+
+        let half = HalfLong::decode(&mut cursor).expect("Failed to decode half");
+        assert_eq!(half.value, u32::MAX);
+    }
+
+    #[test]
+    fn test_encode_half_int_u32_bitfield() {
+        let half = HalfInt {
+            _unused: 0,
+            value: u16::MAX,
+        };
+        let mut vec = Vec::new();
+
+        half.encode(&mut vec).expect("Failed to encode half");
+        assert_eq!(vec, u16::MAX.to_be_bytes().to_vec());
+    }
+
+    #[test]
+    fn test_decode_half_int_u32_bitfield() {
+        let value = u16::MAX as u32;
+
+        let vec = value.to_be_bytes().to_vec();
+        let mut cursor = Cursor::new(vec);
+
+        let half = HalfInt::decode(&mut cursor).expect("Failed to decode half");
+        assert_eq!(half.value, u16::MAX);
+    }
+
+    #[test]
+    fn test_encode_half_short_u8_bitfield() {
+        let half = HalfShort {
+            _unused: 0,
+            value: u8::MAX,
+        };
+        let mut vec = Vec::new();
+
+        half.encode(&mut vec).expect("Failed to encode half");
+        assert_eq!(vec, u8::MAX.to_be_bytes().to_vec());
+    }
+
+    #[test]
+    fn test_decode_half_short_u8_bitfield() {
+        let value = u8::MAX as u16;
+        let vec = value.to_be_bytes().to_vec();
+        let mut cursor = Cursor::new(vec);
+
+        let half = HalfShort::decode(&mut cursor).expect("Failed to decode half");
+        assert_eq!(half.value, u8::MAX);
+    }
+}

protocol-derive/tests/bitfield_position.rs

@@ -0,0 +1,54 @@
+#[macro_use]
+extern crate minecraft_protocol_derive;
+
+use minecraft_protocol::decoder::Decoder;
+use minecraft_protocol::encoder::Encoder;
+use minecraft_protocol::error::{DecodeError, EncodeError};
+
+#[derive(Packet)]
+pub struct Position {
+    #[packet(bitfield(size = 26))]
+    pub x: i32,
+    #[packet(bitfield(size = 26))]
+    pub z: i32,
+    #[packet(bitfield(size = 12))]
+    pub y: u16,
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::Position;
+    use minecraft_protocol::decoder::Decoder;
+    use minecraft_protocol::encoder::Encoder;
+    use minecraft_protocol::error::{DecodeError, EncodeError};
+    use std::io::Cursor;
+
+    #[test]
+    fn test_encode_position_i64_bitfield() {
+        let position = Position {
+            x: 1000,
+            y: 64,
+            z: -1000,
+        };
+
+        let mut vec = Vec::new();
+
+        position
+            .encode(&mut vec)
+            .expect("Failed to encode position");
+
+        assert_eq!(vec, 275152780755008i64.to_be_bytes().to_vec());
+    }
+
+    #[test]
+    fn test_decode_position_i64_bitfield() {
+        let value = -137164079660992i64;
+        let vec = value.to_be_bytes().to_vec();
+        let mut cursor = Cursor::new(vec);
+        let position = Position::decode(&mut cursor).expect("Failed to decode position");
+
+        assert_eq!(position.x, -500);
+        assert_eq!(position.y, 64);
+        assert_eq!(position.z, -1000);
+    }
+}