1 files changed, 77 insertions, 0 deletions
diff --git a/src/pal/inc/rt/cpp/cstring.h b/src/pal/inc/rt/cpp/cstring.h
new file mode 100644
index 0000000000..483a005ca6
--- /dev/null
+++ b/src/pal/inc/rt/cpp/cstring.h
@@ -0,0 +1,77 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+//
+
+//
+
+#ifndef __CSTRING_H__
+#define __CSTRING_H__
+
+#ifdef __cplusplus
+
+#ifndef AtlThrow
+#define AtlThrow(a) RaiseException(STATUS_NO_MEMORY,EXCEPTION_NONCONTINUABLE,0,nullptr); 
+#endif
+#ifndef ATLASSERT
+#define ATLASSERT(a) _ASSERTE(a)
+#endif
+
+#include "ccombstr.h"
+
+class CStringW : public CComBSTR
+{
+public:
+    CStringW() {
+    }
+    
+    CStringW(int nSize, LPCOLESTR sz) :
+        CComBSTR (nSize, sz)
+    {
+    }
+
+    
+    CStringW(LPCOLESTR pSrc) :
+        CComBSTR(pSrc)
+    {
+    }
+
+    CStringW(const CStringW& src) :
+        CComBSTR(src)
+    {
+    }
+
+    CStringW (LPCSTR pSrc) :
+        CComBSTR()
+    {
+        // Intentionaly create us as empty string, later
+        //   we will overwrite ourselves with the
+        //   converted string.
+        int cchSize;
+        cchSize = MultiByteToWideChar(CP_ACP, 0, pSrc, -1, nullptr, 0);
+        if (cchSize == 0)
+        {
+            AtlThrow(E_OUTOFMEMORY);
+        }
+
+        CComBSTR bstr(cchSize);
+        // No convert the string
+        // (Note that (BSTR)bstr will return a pointer to the
+        // allocated WCHAR buffer - done by the CComBSTR constructor)
+        if (MultiByteToWideChar(CP_ACP, 0, pSrc, -1, (WCHAR *)((BSTR)bstr), cchSize) == 0)
+        {
+            AtlThrow(E_OUTOFMEMORY);
+        }
+
+        // And now assign this new bstr to us
+        //  The following is a trick how to avoid copying the string
+        Attach(bstr.Detach());
+    }
+
+    ~CStringW() {
+    }
+};
+
+#endif // __cplusplus
+
+#endif // __CSTRING_H__