进行一个unsafe

shen-nbt5/src/lib.rs

@@ -1,5 +1,47 @@
 
 
+/// 用于读取 NBT 数据
+pub struct NbtReader<'data> {
+    data: &'data [u8],
+    cursor: usize,
+}
+
+impl NbtReader<'_> {
+    pub fn new(data: &[u8]) -> NbtReader {
+        NbtReader {
+            data,
+            cursor: 0,
+        }
+    }
+    
+    pub fn read_i8(&mut self) -> i8 {
+        let value = self.data[self.cursor] as i8;
+        self.cursor += 1;
+        value
+    }
+    pub fn read_i16(&mut self) -> i16 {
+        unsafe {
+            let value = *(self.data[self.cursor..].as_ptr() as *const i16);
+            self.cursor += 2;
+            value.to_be()
+        }
+    }
+    pub fn read_i32(&mut self) -> i32 {
+        unsafe {
+            let value = *(self.data[self.cursor..].as_ptr() as *const i32);
+            self.cursor += 4;
+            value.to_be()
+        }
+    }
+    pub fn read_i64(&mut self) -> i64 {
+        unsafe {
+            let value = *(self.data[self.cursor..].as_ptr() as *const i64);
+            self.cursor += 8;
+            value.to_be()
+        }
+    }
+}
+
 #[derive(Debug, Clone)]
 pub enum NbtValue<'value> {
     // end: 0
@@ -15,17 +57,18 @@ pub enum NbtValue<'value> {
     Float(f32),
     /// 6
     Double(f64),
-    /// 8
-    String(&'value str),
     /// 7
     ByteArray(Vec<i8>),
-    /// 11
-    IntArray(Vec<i32>),
-    /// 12
-    LongArray(Vec<i64>),
+    /// 8
+    /// 或者叫 u8 array
+    String(&'value str),
     /// 9
     List(Vec<NbtValue<'value>>),
     /// 10
     Compound(Vec<(String, NbtValue<'value>)>),
+    /// 11
+    IntArray(Vec<i32>),
+    /// 12
+    LongArray(Vec<i64>),
 }