license and include guards

Author: uzairnawaz

libc/src/__support/wchar/character_converter.h

@@ -1,8 +1,20 @@
+//===-- Definition of a class for mbstate_t and conversion -----*-- 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 LLVM_LIBC_SRC___SUPPORT_CHARACTER_CONVERTER_H
+#define LLVM_LIBC_SRC___SUPPORT_CHARACTER_CONVERTER_H
 
 #include "hdr/types/wchar_t.h"
 #include "src/__support/wchar/mbstate.h"
 #include "src/__support/wchar/utf_ret.h"
 
+namespace LIBC_NAMESPACE_DECL {
+
 class CharacterConverter {
 private:
   mbstate_t *state;
@@ -18,3 +30,7 @@ class CharacterConverter {
   utf_ret<char> pop_utf8();
   utf_ret<wchar_t> pop_utf32();
 };
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC___SUPPORT_CHARACTER_CONVERTER_H

libc/src/__support/wchar/mbstate.h

@@ -1,8 +1,25 @@
+//===-- Definition of mbstate_t -------------------------- -----*-- 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 LLVM_LIBC_SRC___SUPPORT_MBSTATE_H
+#define LLVM_LIBC_SRC___SUPPORT_MBSTATE_H
 
 #include "hdr/types/wchar_t.h"
 
+namespace LIBC_NAMESPACE_DECL {
+
 struct mbstate_t {
   wchar_t partial;
   unsigned char bits_processed;
   unsigned char total_bytes;
-};
+}; 
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC___SUPPORT_MBSTATE_H
+

libc/src/__support/wchar/utf_ret.h

@@ -1,5 +1,21 @@
+//===-- Definition of utf_ret ----------------------------------*-- 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 LLVM_LIBC_SRC___SUPPORT_UTF_RET_H
+#define LLVM_LIBC_SRC___SUPPORT_UTF_RET_H
+
+namespace LIBC_NAMESPACE_DECL {
 
 template <typename T> struct utf_ret {
   T out;
   int error;
 };
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC___SUPPORT_UTF_RET_H