1 files changed, 32 insertions, 0 deletions
diff --git a/winsup/mingw/mingwex/wmemcmp.c b/winsup/mingw/mingwex/wmemcmp.c
new file mode 100644
index 000000000..e1e034c7b
--- /dev/null
+++ b/winsup/mingw/mingwex/wmemcmp.c
@@ -0,0 +1,32 @@
+/*	This source code was extracted from the Q8 package created and placed
+    in the PUBLIC DOMAIN by Doug Gwyn <gwyn@arl.mil>
+    last edit:	1999/11/05	gwyn@arl.mil
+
+    Implements subclause 7.24 of ISO/IEC 9899:1999 (E).
+
+	It supports an encoding where all char codes are mapped
+	to the *same* code values within a wchar_t or wint_t,
+	so long as no other wchar_t codes are used by the program.
+
+*/
+
+#include	<wchar.h>
+
+int
+wmemcmp(s1, s2, n)
+	register const wchar_t	*s1;
+	register const wchar_t	*s2;
+	size_t				n;
+	{
+	if ( n == 0 || s1 == s2 )
+		return 0;		/* even for NULL pointers */
+
+	if ( (s1 != NULL) != (s2 != NULL) )
+		return s2 == NULL ? 1 : -1;	/* robust */
+
+	for ( ; n > 0; ++s1, ++s2, --n )
+		if ( *s1 != *s2 )
+			return *s1 - *s2;
+
+	return 0;
+	}