1 files changed, 53 insertions, 0 deletions
diff --git a/lib/unistring/unistr/u32-mbtouc-unsafe.c b/lib/unistring/unistr/u32-mbtouc-unsafe.c
new file mode 100644
index 0000000..23d1512
--- /dev/null
+++ b/lib/unistring/unistr/u32-mbtouc-unsafe.c
@@ -0,0 +1,53 @@
+/* Look at first character in UTF-32 string.
+   Copyright (C) 2002, 2006-2007, 2009-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This program is free software: you can redistribute it and/or
+   modify it under the terms of either:
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at your
+       option) any later version.
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at your
+       option) any later version.
+
+   or both in parallel, as here.
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#if defined IN_LIBUNISTRING
+/* Tell unistr.h to declare u32_mbtouc_unsafe as 'extern', not
+   'static inline'.  */
+# include "unistring-notinline.h"
+#endif
+
+/* Specification.  */
+#include "unistr.h"
+
+#if !HAVE_INLINE
+
+int
+u32_mbtouc_unsafe (ucs4_t *puc, const uint32_t *s, size_t n)
+{
+  uint32_t c = *s;
+
+  if (c < 0xd800 || (c >= 0xe000 && c < 0x110000))
+    *puc = c;
+  else
+    /* invalid multibyte character */
+    *puc = 0xfffd;
+  return 1;
+}
+
+#endif