win: Implement c16lcpy without base:c16*

util/stdlib/strlcpy.cc

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
 #include "util/stdlib/strlcpy.h"
 
+#include "base/logging.h"
+#include "build/build_config.h"
+
+#if defined(OS_WIN) && defined(WCHAR_T_IS_UTF16)
+#include <strsafe.h>
+#endif
+
 namespace crashpad {
 
+#if defined(OS_WIN) && defined(WCHAR_T_IS_UTF16)
+
 size_t c16lcpy(base::char16* destination,
                const base::char16* source,
                size_t length) {
+  HRESULT result = StringCchCopyW(destination, length, source);
+  CHECK(result == S_OK || result == STRSAFE_E_INSUFFICIENT_BUFFER);
+  return wcslen(source);
+}
+
+#elif defined(WCHAR_T_IS_UTF32)
+
+size_t c16lcpy(base::char16* destination,
+               const base::char16* source,
+               size_t length) {
   size_t source_length = base::c16len(source);
   if (source_length < length) {
     base::c16memcpy(destination, source, source_length + 1);
   } else if (length != 0) {
     base::c16memcpy(destination, source, length - 1);
     destination[length - 1] = '\0';
   }
   return source_length;
 }
 
+#endif  // WCHAR_T_IS_UTF32
+
 }  // namespace crashpad