1 files changed, 8 insertions, 0 deletions
diff --git a/src/nvim/ascii.h b/src/nvim/ascii.h
index 2b3e94d5a0..9938d1b328 100644
--- a/src/nvim/ascii.h
+++ b/src/nvim/ascii.h
@@ -122,6 +122,14 @@ static inline bool ascii_isxdigit(int c)
          || (c >= 'A' && c <= 'F');
 }
 
+/// Checks if `c` is a binary digit, that is, 0-1.
+///
+/// @see {ascii_isdigit}
+static inline bool ascii_isbdigit(int c)
+{
+  return (c == '0' || c == '1');
+}
+
 /// Checks if `c` is a white-space character, that is,
 /// one of \f, \n, \r, \t, \v.
 ///