1 files changed, 42 insertions, 0 deletions
diff --git a/src/inc/fstring.h b/src/inc/fstring.h
new file mode 100644
index 0000000000..68c9098c8f
--- /dev/null
+++ b/src/inc/fstring.h
@@ -0,0 +1,42 @@
+// 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.
+// ---------------------------------------------------------------------------
+// FString.h  (Fast String)
+// 
+
+// ---------------------------------------------------------------------------
+
+// ------------------------------------------------------------------------------------------
+// FString is fast string handling namespace
+
+
+// 1) Simple
+// 2) No C++ exception
+// 3) Optimized for speed
+
+
+#ifndef _FSTRING_H_
+#define _FSTRING_H_
+
+namespace FString
+{
+    // Scan for ASCII only string, calculate result UTF8 string length
+    HRESULT Unicode_Utf8_Length(__in_z LPCWSTR pString, __out bool * pAllAscii, __out DWORD * pLength);
+
+    // Convert UNICODE string to UTF8 string. Direct/fast conversion if ASCII
+    HRESULT Unicode_Utf8(__in_z LPCWSTR pString, bool allAscii, __out_z LPSTR pBuffer, DWORD length);
+
+    // Scan for ASCII string, calculate result UNICODE string length
+    HRESULT Utf8_Unicode_Length(__in_z LPCSTR pString, __out bool * pAllAscii, __out DWORD * pLength);
+
+    // Convert UTF8 string to UNICODE. Direct/fast conversion if ASCII
+    HRESULT Utf8_Unicode(__in_z LPCSTR pString, bool allAscii, __out_z LPWSTR pBuffer, DWORD length);
+
+    HRESULT ConvertUnicode_Utf8(__in_z LPCWSTR pString, __out_z LPSTR * pBuffer);
+
+    HRESULT ConvertUtf8_Unicode(__in_z LPCSTR pString, __out_z LPWSTR * pBuffer);
+
+}  // namespace FString
+
+#endif  // _FSTRING_H_