From ca2df4878c2539c6a66553df182758a01ebcdcb8 Mon Sep 17 00:00:00 2001
From: q66
Date: Fri, 15 Dec 2023 23:09:31 +0100
Subject: Move wctomb to stdlib.h and disable it for now

---
 include/stdlib.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'include/stdlib.h')

diff --git a/include/stdlib.h b/include/stdlib.h
index 6081170..4b47297 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -59,6 +59,24 @@ _FORTIFY_FN(wcstombs) size_t wcstombs(char * _FORTIFY_POS0 __s,
 	return __orig_wcstombs(__s, __ws, __n);
 }
 
+#if 0
+/* https://github.com/jvoisin/fortify-headers/issues/24 */
+#ifdef MB_CUR_MAX
+#undef wctomb
+#if __has_builtin(__builtin_wctomb)
+__diagnose_as_builtin(__builtin_wctomb, 1, 2)
+#endif
+_FORTIFY_FN(wctomb) int wctomb(char * _FORTIFY_POS0 __s, wchar_t __w)
+{
+	__fh_size_t __b = __bos(__s, 0);
+
+	if (__s && 16 > __b && MB_CUR_MAX > __b)
+		__builtin_trap();
+	return __orig_wctomb(__s, __w);
+}
+#endif // MB_CUR_MAX
+#endif
+
 #undef qsort
 #if __has_builtin(__builtin_qsort)
 __diagnose_as_builtin(__builtin_qsort, 1, 2, 3, 4)
-- 
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