spkg: strlib: Add RtlMemCmp() to string lib

Signed-off-by: Chloe M. <chloe@yiffware.org>
2026-07-10 03:46:56 +00:00
parent 9231fd5aef
commit 88f643452c
2 changed files with 43 additions and 0 deletions
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2026, Chloe M.
+ * Provided under the BSD-3 clause.
+ *
+ * Description: RtlMemCmp() implementation
+ * Author:      Chloe M.
+ */
+
+#include <string.h>
+
+LONG
+RtlMemCmp(const VOID *Buffer1, const VOID *Buffer2, USIZE Length)
+{
+    const UCHAR *Ptr1 = Buffer1;
+    const UCHAR *Ptr2 = Buffer2;
+
+    if (Buffer1 == NULL || Buffer2 == NULL) {
+        return 0;
+    }
+
+    if (Length == 0) {
+        return 0;
+    }
+
+    do {
+        if (*Ptr1++ != *Ptr2++) {
+            return (*--Ptr1 - *--Ptr2);
+        }
+    } while (--Length != 0);
+
+    return 0;
+}