From 3ad39e9878310e5317ee73c9b353c1e2c1c5c4ee Mon Sep 17 00:00:00 2001
From: Richard Qin <richard.qin.x@gmail.com>
Date: Sat, 11 Jul 2026 22:48:30 +0800
Subject: lib: establish Zircon libc++ and KTL foundation

---
 third_party/libcxx/include/c++/v1/uchar.h | 60 +++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 third_party/libcxx/include/c++/v1/uchar.h

(limited to 'third_party/libcxx/include/c++/v1/uchar.h')

diff --git a/third_party/libcxx/include/c++/v1/uchar.h b/third_party/libcxx/include/c++/v1/uchar.h
new file mode 100644
index 0000000..01e1d57
--- /dev/null
+++ b/third_party/libcxx/include/c++/v1/uchar.h
@@ -0,0 +1,60 @@
+// -*- C++ -*-
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBCPP_UCHAR_H
+#define _LIBCPP_UCHAR_H
+
+/*
+    uchar.h synopsis // since C++11
+
+Macros:
+
+    __STDC_UTF_16__
+    __STDC_UTF_32__
+
+Types:
+
+  mbstate_t
+  size_t
+
+size_t mbrtoc8(char8_t* pc8, const char* s, size_t n, mbstate_t* ps);     // since C++20
+size_t c8rtomb(char* s, char8_t c8, mbstate_t* ps);                       // since C++20
+size_t mbrtoc16(char16_t* pc16, const char* s, size_t n, mbstate_t* ps);
+size_t c16rtomb(char* s, char16_t c16, mbstate_t* ps);
+size_t mbrtoc32(char32_t* pc32, const char* s, size_t n, mbstate_t* ps);
+size_t c32rtomb(char* s, char32_t c32, mbstate_t* ps);
+
+*/
+
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/uchar.h>
+#else
+#  include <__config>
+
+#  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#    pragma GCC system_header
+#  endif
+
+#  if !defined(_LIBCPP_CXX03_LANG)
+
+// Some platforms don't implement <uchar.h> and we don't want to give a hard
+// error on those platforms. When the platform doesn't provide <uchar.h>, at
+// least include <stddef.h> so we get the declaration for size_t, and try to
+// get the declaration of mbstate_t too.
+#    if __has_include_next(<uchar.h>)
+#      include_next <uchar.h>
+#    else
+#      include <__mbstate_t.h>
+#      include <stddef.h>
+#    endif
+
+#  endif // _LIBCPP_CXX03_LANG
+#endif   // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+
+#endif // _LIBCPP_UCHAR_H
-- 
cgit v1.2.3