[UCRT] Import Microsoft.Windows.SDK.CRTSource version 10.0.22621.3

Imported from https://www.nuget.org/packages/Microsoft.Windows.SDK.CRTSource/10.0.22621.3
License: MIT

sdk/lib/ucrt/stdio/clearerr.cpp

@@ -0,0 +1,37 @@
+//
+// clearerr.cpp
+//
+//      Copyright (c) Microsoft Corporation.  All rights reserved.
+//
+// Defines clearerr(), which clears error and EOF flags from a stream.
+//
+#include <corecrt_internal_stdio.h>
+
+
+
+extern "C" errno_t __cdecl clearerr_s(FILE* const public_stream)
+{
+    __crt_stdio_stream const stream(public_stream);
+
+    _VALIDATE_RETURN_ERRCODE(stream.valid(), EINVAL);
+
+    _lock_file(stream.public_stream());
+    __try
+    {
+        stream.unset_flags(_IOERROR | _IOEOF);                               // Clear stdio flags
+        _osfile_safe(_fileno(stream.public_stream())) &= ~(FEOFLAG);         // Clear lowio flags
+    }
+    __finally
+    {
+        _unlock_file(stream.public_stream());
+    }
+
+    return 0;
+}
+
+
+
+extern "C" void __cdecl clearerr(FILE* const stream)
+{
+    clearerr_s(stream);
+}