rlw field is actually an offset into bits when used at runtime (#293)

It's u32 when stored though.

Author: Byron

git-bitmap/src/lib.rs

@@ -50,12 +50,13 @@ pub mod ewah {
         }
 
         let (rlw, data) = decode::u32(data).ok_or(decode::Error::Corrupt("eof while reading run length width"))?;
+        dbg!(rlw);
 
         Ok((
             Vec {
                 num_bits,
                 bits: buf,
-                rlw,
+                rlw: rlw as usize,
             },
             data,
         ))
@@ -66,6 +67,7 @@ pub mod ewah {
     pub struct Vec {
         num_bits: u32,
         bits: std::vec::Vec<u64>,
-        rlw: u32,
+        /// RLW is an offset into the `bits` buffer, so `1` translates into &bits[1] essentially.
+        rlw: usize,
     }
 }