Add get_sized to Block and Sequence.

src/implement/block.rs

@@ -30,6 +30,13 @@ impl Block {
         data
     }
 
+    pub fn get_sized<const K:usize>(&self) -> [u8; K]
+    {
+        let mut data = [0u8; K];
+        Runtime::load(self.refer, &mut data as _, 0, std::cmp::min(self.len(), K));
+        data
+    }
+
     pub fn set_byte(&mut self, index:usize, byte:u8)
     {
         if index < self.len() {

src/implement/sequence.rs

@@ -97,6 +97,18 @@ impl Sequence {
         }
     }
 
+    pub fn get_sized<const K:usize>(&self) -> [u8; K]
+    {
+        let mut data = [0u8; K];
+        if let Some(header) = unsafe {(self.refer.address() as *const Data).as_ref()} {
+            let slice = unsafe { std::slice::from_raw_parts_mut(header.data as _, header.length) };
+            for i in 0..std::cmp::min(slice.len(), K) {
+                data[i] = slice[i];
+            }
+        }
+        data
+    }
+
     pub fn get_str(&self) -> String
     {
         String::from_utf8(self.get()).unwrap_or_default()