[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/rewind.cpp

@@ -0,0 +1,60 @@
+//
+// rewind.cpp
+//
+//      Copyright (c) Microsoft Corporation.  All rights reserved.
+//
+// Defines rewind(), which rewinds a stream.
+//
+#include <corecrt_internal_stdio.h>
+#include <corecrt_internal_ptd_propagation.h>
+
+
+
+// Rewinds a stream back to the beginning, if the stream supports seeking.  The
+// stream is flushed and errors are cleared before the rewind.
+static void __cdecl _rewind_internal(FILE* const public_stream, __crt_cached_ptd_host& ptd)
+{
+    __crt_stdio_stream const stream(public_stream);
+
+    _UCRT_VALIDATE_RETURN_VOID(ptd, stream.valid(), EINVAL);
+
+    int const fh = _fileno(stream.public_stream());
+
+    _lock_file(stream.public_stream());
+    __try
+    {
+        // Flush the streeam, reset the error state, and seek back to the
+        // beginning:
+        __acrt_stdio_flush_nolock(stream.public_stream(), ptd);
+        // If the stream is opened in update mode and is currently in use for reading,
+        // the buffer must be abandoned to ensure consistency when transitioning from
+        // reading to writing.
+        // __acrt_stdio_flush_nolock will not reset the buffer when _IOWRITE flag
+        // is not set.
+        __acrt_stdio_reset_buffer(stream);
+
+
+        stream.unset_flags(_IOERROR | _IOEOF);
+        _osfile_safe(fh) &= ~(FEOFLAG);
+
+       if (stream.has_all_of(_IOUPDATE))
+       {
+           stream.unset_flags(_IOREAD | _IOWRITE);
+       }
+
+        if (_lseek_internal(fh, 0, 0, ptd) == -1)
+        {
+            stream.set_flags(_IOERROR);
+        }
+    }
+    __finally
+    {
+        _unlock_file(stream.public_stream());
+    }
+}
+
+extern "C" void __cdecl rewind(FILE* const public_stream)
+{
+    __crt_cached_ptd_host ptd;
+    _rewind_internal(public_stream, ptd);
+}