1 files changed, 32 insertions, 0 deletions
diff --git a/lib/memchr2.h b/lib/memchr2.h
new file mode 100644
index 0000000..2fb8047
--- /dev/null
+++ b/lib/memchr2.h
@@ -0,0 +1,32 @@
+/* Scan memory for the first of two bytes.
+   Copyright (C) 2008-2022 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file 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 <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Return the first address of either C1 or C2 (treated as unsigned
+   char) that occurs within N bytes of the memory region S.  If
+   neither byte appears, return NULL.  */
+
+extern void *memchr2 (void const *s, int c1, int c2, size_t n)
+  _GL_ATTRIBUTE_PURE;
+
+#ifdef __cplusplus
+}
+#endif