add raw_ overloads for prefix/from counting

Signed-off-by: Jason Volk <jason@zemos.net>

src/database/map/count.rs

@@ -21,6 +21,18 @@ where
 	self.keys_from_raw(from).count()
 }
 
+/// Count the number of entries in the map starting from a lower-bound.
+///
+/// - From is a raw
+#[implement(super::Map)]
+#[inline]
+pub fn raw_count_from<'a, P>(&'a self, from: &'a P) -> impl Future<Output = usize> + Send + 'a
+where
+	P: AsRef<[u8]> + ?Sized + Debug + Sync + 'a,
+{
+	self.raw_keys_from(from).count()
+}
+
 /// Count the number of entries in the map matching a prefix.
 ///
 /// - Prefix is structured key
@@ -32,3 +44,15 @@ where
 {
 	self.keys_prefix_raw(prefix).count()
 }
+
+/// Count the number of entries in the map matching a prefix.
+///
+/// - Prefix is raw
+#[implement(super::Map)]
+#[inline]
+pub fn raw_count_prefix<'a, P>(&'a self, prefix: &'a P) -> impl Future<Output = usize> + Send + 'a
+where
+	P: AsRef<[u8]> + ?Sized + Debug + Sync + 'a,
+{
+	self.raw_keys_prefix(prefix).count()
+}