Split the tensor file.

src/dtype.rs

@@ -0,0 +1,14 @@
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
+pub enum DType {
+    F32,
+    F64,
+}
+
+impl DType {
+    pub fn size_in_bytes(&self) -> usize {
+        match self {
+            Self::F32 => 4,
+            Self::F64 => 8,
+        }
+    }
+}