From ed7acf5176ad88caa90959b90507e267072d9b89 Mon Sep 17 00:00:00 2001
From: alwaysmpe <10211004+alwaysmpe@users.noreply.github.com>
Date: Sat, 27 Sep 2025 01:04:15 +0100
Subject: [PATCH] Support negative indexing

---
 ugrapheme/ugrapheme.pyx | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/ugrapheme/ugrapheme.pyx b/ugrapheme/ugrapheme.pyx
index 483b6cd..3427e91 100644
--- a/ugrapheme/ugrapheme.pyx
+++ b/ugrapheme/ugrapheme.pyx
@@ -631,7 +631,13 @@ cpdef unicode grapheme_slice(unicode ustr,
 
     cdef size_t l = PyUnicode_GetLength(ustr) - upos
     if startpos < 0:
-        startpos = 0
+        startpos += l
+        if startpos < 0:
+            startpos = 0
+    if endpos < 0:
+        endpos += l
+        if endpos < 0:
+            endpos = 0
     if startpos >= l or endpos <= startpos:
         return ''