From 2dfa6f6033f762243f776025aeb7dbc2b383342b Mon Sep 17 00:00:00 2001
From: bfredl <bjorn.linse@gmail.com>
Date: Mon, 16 Sep 2024 19:28:37 +0200
Subject: refactor(multibyte): neo-casefolding without allocation

fixes #30400
---
 src/nvim/mbyte.c | 17 +++--------------
 1 file changed, 3 insertions(+), 14 deletions(-)

(limited to 'src/nvim')

diff --git a/src/nvim/mbyte.c b/src/nvim/mbyte.c
index 05f81c48a9..01e720283e 100644
--- a/src/nvim/mbyte.c
+++ b/src/nvim/mbyte.c
@@ -1379,22 +1379,11 @@ int utf_fold(int a)
     return a;
   }
 
-  utf8proc_uint8_t input_str[16] = { 0 };
-  if (utf8proc_encode_char(a, input_str) <= 0) {
-    return a;
-  }
-
-  utf8proc_uint8_t *fold_str_utf;
-  if (utf8proc_map((utf8proc_uint8_t *)input_str, 0, &fold_str_utf,
-                   UTF8PROC_NULLTERM | UTF8PROC_CASEFOLD) < 0) {
-    return a;
-  }
-
-  int fold_codepoint_utf = utf_ptr2char((char *)fold_str_utf);
+  utf8proc_int32_t result[1];
 
-  xfree(fold_str_utf);
+  utf8proc_ssize_t res = utf8proc_decompose_char(a, result, 1, UTF8PROC_CASEFOLD, NULL);
 
-  return fold_codepoint_utf;
+  return (res == 1) ? result[0] : a;
 }
 
 // Vim's own character class functions.  These exist because many library
-- 
cgit