feat: add get_item_mut fn to FieldSliceMut

1 files changed, 18 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 12689c7..1d52d91 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -501,6 +501,24 @@ pub struct FieldSliceMut<'mv>
 
 impl FieldSliceMut<'_>
 {
+    pub fn get_item_mut(&mut self, item_index: usize) -> Option<FieldMut<'_>>
+    {
+        let start_off = item_index * self.field_metadata.size;
+
+        if item_index >= self.len {
+            return None;
+        }
+
+        let field_bytes = self
+            .bytes
+            .get_mut(start_off..start_off + self.field_metadata.size)?;
+
+        Some(FieldMut {
+            bytes: field_bytes,
+            field_metadata: self.field_metadata,
+        })
+    }
+
     pub fn iter_mut(&mut self) -> FieldSliceIterMut<'_>
     {
         FieldSliceIterMut {