Add BitSeq.isZeros

stew/bitseqs.nim

@@ -245,3 +245,8 @@ func isSubsetOf*(a, b: BitSeq): bool =
       return false
   true
 
+proc isZeros*(x: BitSeq): bool =
+  for w in words(x):
+    if w != 0: return false
+  return true
+

stew/varints.nim

@@ -147,9 +147,7 @@ func readVarint*[Stream](input: var Stream,
   ##
   ## * `ValueError`
   ##   The stream contained an invalid varint value.
-  var
-    parser: VarintParser[type(outVal), flavour]
-    pos = input.pos
+  var parser: VarintParser[type(outVal), flavour]
 
   while not input.eof:
     case parser.feedByte(input.read)