[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/string/wcscmp.cpp

@@ -0,0 +1,40 @@
+//
+// wcscmp.cpp
+//
+//      Copyright (c) Microsoft Corporation.  All rights reserved.
+//
+// Defines wcscmp(), which compares two wide character strings, determining
+// their ordinal order.
+//
+// Note that the comparison is performed with unsigned elements (wchar_t is
+// unsigned in this implementation), so the null character (0) is less than
+// all other characters.
+//
+// Returns:
+//  * -1 if a  < b
+//  *  0 if a == b
+//  *  1 if a  > b
+//
+#include <string.h>
+
+
+
+#if defined _M_X64 || defined _M_IX86 || defined _M_ARM || defined _M_ARM64
+    #pragma warning(disable: 4163)
+    #pragma function(wcscmp)
+#endif
+
+
+
+extern "C" int __cdecl wcscmp(wchar_t const* a, wchar_t const* b)
+{
+    int result = 0;
+#pragma warning(suppress:__WARNING_POTENTIAL_BUFFER_OVERFLOW_NULLTERMINATED) // 26018
+    while ((result = (int)(*a - *b)) == 0 && *b)
+    {
+        ++a;
+        ++b;
+    }
+
+    return ((-result) < 0) - (result < 0); // (if positive) - (if negative) generates branchless code
+}