From c42a04101a5635fb7557ebdf7b5c7f2dbcb12b54 Mon Sep 17 00:00:00 2001
From: Tilman Sauerbeck <tilman@code-monkey.de>
Date: Tue, 11 Feb 2020 19:54:06 +0100
Subject: [PATCH] common: Implement Storage::erase() in Mx25l.

---
 src/common/mx25l.rs   |  4 ++++
 src/common/storage.rs |  2 ++
 test/logger_test.rs   | 13 +++++++++++++
 3 files changed, 19 insertions(+)

diff --git a/src/common/mx25l.rs b/src/common/mx25l.rs
index 56c2d44..6c28c5a 100644
--- a/src/common/mx25l.rs
+++ b/src/common/mx25l.rs
@@ -198,6 +198,10 @@ impl Storage for Mx25l {
         Ok(())
     }
 
+    fn erase(&mut self, address: usize) -> Result<(), Error> {
+        self.erase_sector(address)
+    }
+
     fn clear(&mut self) {
         self.erase_all();
     }
diff --git a/src/common/storage.rs b/src/common/storage.rs
index ebebe79..36d77e3 100644
--- a/src/common/storage.rs
+++ b/src/common/storage.rs
@@ -32,5 +32,7 @@ pub trait Storage {
 
     fn write(&mut self, address: usize, buffer: &[u8; 4096]) -> Result<(), Error>;
 
+    fn erase(&mut self, address: usize) -> Result<(), Error>;
+
     fn clear(&mut self);
 }
diff --git a/test/logger_test.rs b/test/logger_test.rs
index a030821..a254f50 100644
--- a/test/logger_test.rs
+++ b/test/logger_test.rs
@@ -68,6 +68,19 @@ impl Storage for FakeStorage {
         Ok(())
     }
 
+    fn erase(&mut self, address: usize) -> Result<(), Error> {
+        if (address & 4095) != 0 {
+            return Err(Error::UnalignedAddress);
+        }
+
+        for i in 0..4096 {
+            self.actual[address + i] = 0xff;
+        }
+
+        Ok(())
+
+    }
+
     fn clear(&mut self) {
         self.actual = vec![0xff; MEMORY_SIZE].into_boxed_slice();
     }
-- 
2.30.2