1 files changed, 20 insertions, 0 deletions
diff --git a/extmod/re1.5/charclass.c b/extmod/re1.5/charclass.c
index c9df403750..7f6388c93d 100644
--- a/extmod/re1.5/charclass.c
+++ b/extmod/re1.5/charclass.c
@@ -11,3 +11,23 @@ int _re1_5_classmatch(const char *pc, const char *sp)
     }
     return !is_positive;
 }
+
+int _re1_5_namedclassmatch(const char *pc, const char *sp)
+{
+    // pc points to name of class
+    int off = (*pc >> 5) & 1;
+    if ((*pc | 0x20) == 'd') {
+        if (!(*sp >= '0' && *sp <= '9')) {
+            off ^= 1;
+        }
+    } else if ((*pc | 0x20) == 's') {
+        if (!(*sp == ' ' || (*sp >= '\t' && *sp <= '\r'))) {
+            off ^= 1;
+        }
+    } else { // w
+        if (!((*sp >= 'A' && *sp <= 'Z') || (*sp >= 'a' && *sp <= 'z') || (*sp >= '0' && *sp <= '9') || *sp == '_')) {
+            off ^= 1;
+        }
+    }
+    return off;
+}