about to refactor parsing

1 files changed, 1 insertions, 7 deletions

diff --git a/ebml/src/write.rs b/ebml/src/write.rs
index f57a5c9..89268d5 100644
--- a/ebml/src/write.rs
+++ b/ebml/src/write.rs
@@ -148,13 +148,7 @@ pub fn write_vint(w: &mut Vec<u8>, i: u64) -> Result<()> {
     if i > (1 << 56) - 1 {
         bail!("vint does not fit");
     }
-    let mut len = 1;
-    while len <= 8 {
-        if i < (1 << ((7 * len) - 1)) {
-            break;
-        }
-        len += 1;
-    }
+    let len = (64 - i.leading_zeros() as usize) / 7 + 1;
     let mut bytes = i.to_be_bytes();
     let trunc = &mut bytes[(8 - len)..];
     trunc[0] |= 1 << (8 - len);