[array (rust)] Implement array basis

src/pdata/array.rs

@@ -0,0 +1,39 @@
+use nom::{number::complete::*, IResult};
+use std::fmt;
+
+use crate::pdata::unpack::*;
+
+//------------------------------------------
+
+// TODO: build a data structure representating an array?
+
+// FIXME: rename this struct
+pub struct ArrayBlockEntry {
+    pub block: u64,
+}
+
+impl Unpack for ArrayBlockEntry {
+    fn disk_size() -> u32 {
+        8
+    }
+
+    fn unpack(i: &[u8]) -> IResult<&[u8], ArrayBlockEntry> {
+        let (i, n) = le_u64(i)?;
+        let block = n;
+
+        Ok((
+            i,
+            ArrayBlockEntry {
+                block,
+            }
+        ))
+    }
+}
+
+impl fmt::Display for ArrayBlockEntry {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.block)
+    }
+}
+
+//------------------------------------------