1 files changed, 74 insertions, 0 deletions
diff --git a/usr/src/head/uchar.h b/usr/src/head/uchar.h
new file mode 100644
index 0000000000..83d998b4a1
--- /dev/null
+++ b/usr/src/head/uchar.h
@@ -0,0 +1,74 @@
+/*
+ * This file and its contents are supplied under the terms of the
+ * Common Development and Distribution License ("CDDL"), version 1.0.
+ * You may only use this file in accordance with the terms of version
+ * 1.0 of the CDDL.
+ *
+ * A full copy of the text of the CDDL should have accompanied this
+ * source.  A copy of the CDDL is also available via the Internet at
+ * http://www.illumos.org/license/CDDL.
+ */
+
+/*
+ * Copyright 2020 Robert Mustacchi
+ */
+
+#ifndef _UCHAR_H
+#define	_UCHAR_H
+
+/*
+ * C11 Unicode utilities support.
+ *
+ * Note, we do not define either __STDC_UTF_16__ or __STDC_UTF_32__. While the
+ * functions that are implemented work in that fashion, the ability to represent
+ * any UTF-16 or UTF-32 code point depends on the current locale. Though in
+ * practice they function that way.
+ */
+
+#include <sys/isa_defs.h>
+#include <sys/feature_tests.h>
+#include <wchar_impl.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if !defined(_SIZE_T) || __cplusplus >= 199711L
+#define	_SIZE_T
+#if defined(_LP64) || defined(_I32LPx)
+typedef	unsigned long size_t;	/* size of something in bytes */
+#else
+typedef	unsigned int size_t;	/* (historical version) */
+#endif
+#endif	/* _SIZE_T */
+
+#if !defined(_MBSTATE_T) || __cplusplus >= 199711L
+#define	_MBSTATE_T
+typedef __mbstate_t	mbstate_t;
+#endif	/* _MBSTATE_T */
+
+/*
+ * These types must match the uint_least16_t and uint_least32_t. They are
+ * defined in terms of the same type so as to minimize the needed includes.
+ * C++11 also defines these types and they are considered built in, so we should
+ * not define them in that context.
+ */
+#if __cplusplus < 2011103L
+typedef unsigned short	char16_t;
+typedef unsigned int	char32_t;
+#endif
+
+extern size_t mbrtoc16(char16_t *_RESTRICT_KYWD, const char *_RESTRICT_KYWD,
+    size_t, mbstate_t *_RESTRICT_KYWD);
+extern size_t mbrtoc32(char32_t *_RESTRICT_KYWD, const char *_RESTRICT_KYWD,
+    size_t, mbstate_t *_RESTRICT_KYWD);
+extern size_t c16rtomb(char *_RESTRICT_KYWD, char16_t,
+    mbstate_t *_RESTRICT_KYWD);
+extern size_t c32rtomb(char *_RESTRICT_KYWD, char32_t,
+    mbstate_t *_RESTRICT_KYWD);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _UCHAR_H */