1 files changed, 9 insertions, 2 deletions
diff --git a/matroska/src/write.rs b/matroska/src/write.rs
index ee1c44c..8c1e7bb 100644
--- a/matroska/src/write.rs
+++ b/matroska/src/write.rs
@@ -26,6 +26,10 @@ impl EbmlWriter {
         Ok(())
     }
 
+    pub fn position(&self) -> usize {
+        self.position
+    }
+
     pub fn write_padding(&mut self, position: usize) -> Result<()> {
         let mut size = position - self.position;
         match size {
@@ -62,14 +66,17 @@ impl EbmlWriter {
         if i > (1 << 56) - 1 {
             bail!("vint does not fit");
         }
+        self.write_vint_len(i, Self::vint_length(i))
+    }
+    pub fn vint_length(v: u64) -> usize {
         let mut len = 1;
         while len <= 8 {
-            if i < (1 << ((7 * len) - 1)) {
+            if v < (1 << ((7 * len) - 1)) {
                 break;
             }
             len += 1;
         }
-        self.write_vint_len(i, len)
+        len
     }
     pub fn write_vint_len(&mut self, i: u64, len: usize) -> Result<()> {
         let mut bytes = i.to_be_bytes();