[LIBCNTPR] Implement NT version of _wcsicmp / _wcsnicmp

Passes all ntdll wine tests.

Author: tkreuzer

sdk/lib/crt/wstring/_wcsicmp_nt.c

@@ -0,0 +1,43 @@
+/*
+ * PROJECT:     ReactOS NT CRT library
+ * LICENSE:     MIT (https://spdx.org/licenses/MIT)
+ * PURPOSE:     Implementation of _wcsicmp
+ * COPYRIGHT:   Copyright 2025 Timo Kreuzer <[email protected]>
+ */
+
+#include <string.h>
+
+_Check_return_
+int
+__cdecl
+_wcsicmp(
+    _In_z_ wchar_t const* _String1,
+    _In_z_ wchar_t const* _String2)
+{
+    wchar_t const* p1 = _String1;
+    wchar_t const* p2 = _String2;
+    wchar_t chr1, chr2;
+
+    while (1)
+    {
+        chr1 = *p1++;
+        chr2 = *p2++;
+
+        if (chr1 != chr2)
+        {
+            if ((chr1 >= 'A') && (chr1 <= 'Z'))
+                chr1 += ('a' - 'A');
+            if ((chr2 >= 'A') && (chr2 <= 'Z'))
+                chr2 += ('a' - 'A');
+
+            if (chr1 != chr2)
+                return chr1 - chr2;
+        }
+        else if (chr1 == 0)
+        {
+            break;
+        }
+    }
+
+    return 0;
+}

sdk/lib/crt/wstring/_wcsnicmp_nt.c

@@ -0,0 +1,45 @@
+/*
+ * PROJECT:     ReactOS NT CRT library
+ * LICENSE:     MIT (https://spdx.org/licenses/MIT)
+ * PURPOSE:     Implementation of _wcsnicmp
+ * COPYRIGHT:   Copyright 2025 Timo Kreuzer <[email protected]>
+ */
+
+#include <string.h>
+
+_Check_return_
+int
+__cdecl
+_wcsnicmp(
+    _In_reads_or_z_(_MaxCount) wchar_t const* _String1,
+    _In_reads_or_z_(_MaxCount) wchar_t const* _String2,
+    _In_ size_t _MaxCount)
+{
+    wchar_t const* p1 = _String1;
+    wchar_t const* p2 = _String2;
+    size_t remaining = _MaxCount;
+    wchar_t chr1, chr2;
+
+    while (remaining-- != 0)
+    {
+        chr1 = *p1++;
+        chr2 = *p2++;
+
+        if (chr1 != chr2)
+        {
+            if ((chr1 >= 'A') && (chr1 <= 'Z'))
+                chr1 += ('a' - 'A');
+            if ((chr2 >= 'A') && (chr2 <= 'Z'))
+                chr2 += ('a' - 'A');
+
+            if (chr1 != chr2)
+                return chr1 - chr2;
+        }
+        else if (chr1 == 0)
+        {
+            break;
+        }
+    }
+
+    return 0;
+}

sdk/lib/crt/wstring/wstring.cmake

@@ -1,8 +1,6 @@
 
 list(APPEND LIBCNTPR_WSTRING_SOURCE
-    wstring/wcsicmp.c
     wstring/wcslwr.c
-    wstring/wcsnicmp.c
     wstring/wcsupr.c
     wstring/wcscspn.c
     wstring/wcsspn.c
@@ -14,6 +12,13 @@ list(APPEND CRT_WSTRING_SOURCE
     wstring/mbrtowc.c
     wstring/wcrtomb.c
     wstring/wcscoll.c
+    wstring/wcsicmp.c
+    wstring/wcsnicmp.c
     wstring/wcstok.c
     wstring/wcsxfrm.c
 )
+
+list(APPEND LIBCNTPR_WSTRING_SOURCE
+    wstring/_wcsicmp_nt.c
+    wstring/_wcsnicmp_nt.c
+)