Improve error reporting of `NtfsIndexRecord::validate_sizes`

2 files changed, 10 insertions, 4 deletions

diff --git a/src/error.rs b/src/error.rs
index fa62d8e..1836be3 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -76,8 +76,14 @@ pub enum NtfsError {
         expected: &'static [u8],
         actual: [u8; 4],
     },
-    /// The NTFS index record at byte position {position:#010x} should have a maximum of {expected} bytes, but it indicates {actual} bytes
-    InvalidNtfsIndexSize {
+    /// The NTFS index record at byte position {position:#010x} indicates an allocated size of {expected} bytes, but the record only has a size of {actual} bytes
+    InvalidNtfsIndexAllocatedSize {
+        position: u64,
+        expected: u32,
+        actual: u32,
+    },
+    /// The NTFS index record at byte position {position:#010x} indicates a used size of {expected} bytes, but only {actual} bytes are allocated
+    InvalidNtfsIndexUsedSize {
         position: u64,
         expected: u32,
         actual: u32,
diff --git a/src/index_record.rs b/src/index_record.rs
index 5b47aa1..b6120c1 100644
--- a/src/index_record.rs
+++ b/src/index_record.rs
@@ -131,7 +131,7 @@ impl<'n> NtfsIndexRecord<'n> {
         // the size defined for all index records of this index.
         let total_allocated_size = INDEX_RECORD_HEADER_SIZE + self.index_allocated_size();
         if total_allocated_size > index_record_size {
-            return Err(NtfsError::InvalidNtfsIndexSize {
+            return Err(NtfsError::InvalidNtfsIndexAllocatedSize {
                 position: self.record.position(),
                 expected: index_record_size,
                 actual: total_allocated_size,
@@ -142,7 +142,7 @@ impl<'n> NtfsIndexRecord<'n> {
         // larger than the total allocated size.
         let total_used_size = INDEX_RECORD_HEADER_SIZE + self.index_used_size();
         if total_used_size > total_allocated_size {
-            return Err(NtfsError::InvalidNtfsIndexSize {
+            return Err(NtfsError::InvalidNtfsIndexUsedSize {
                 position: self.record.position(),
                 expected: total_allocated_size,
                 actual: total_used_size,