From e61108d9b5b64b5d805ccc76fc90a5186097fe40 Mon Sep 17 00:00:00 2001
From: belliash <belliash@codingworkshop.eu.org>
Date: Sun, 21 Aug 2022 16:27:57 +0200
Subject: [PATCH] Implement RtlCopyMemory() and RtlSameMemory(), no inline
 functions in static library

---
 sdk/xtklib/CMakeLists.txt    |  1 +
 sdk/xtklib/includes/librtl.h | 17 +++++--
 sdk/xtklib/rtl/memory.c      | 95 ++++++++++++++++++++++++++++++++++++
 sdk/xtklib/rtl/plist.c       |  5 --
 4 files changed, 108 insertions(+), 10 deletions(-)
 create mode 100644 sdk/xtklib/rtl/memory.c

diff --git a/sdk/xtklib/CMakeLists.txt b/sdk/xtklib/CMakeLists.txt
index e2fdf10..de73c23 100644
--- a/sdk/xtklib/CMakeLists.txt
+++ b/sdk/xtklib/CMakeLists.txt
@@ -10,6 +10,7 @@ include_directories(
 list(APPEND XTKLIB_SOURCE
     ${XTKLIB_SOURCE_DIR}/hl/cport.c
     ${XTKLIB_SOURCE_DIR}/hl/${ARCH}/cpufunc.c
+    ${XTKLIB_SOURCE_DIR}/rtl/memory.c
     ${XTKLIB_SOURCE_DIR}/rtl/plist.c
     ${XTKLIB_SOURCE_DIR}/rtl/widestr.c)
 
diff --git a/sdk/xtklib/includes/librtl.h b/sdk/xtklib/includes/librtl.h
index d49f0cd..3f15519 100644
--- a/sdk/xtklib/includes/librtl.h
+++ b/sdk/xtklib/includes/librtl.h
@@ -14,28 +14,35 @@
 #include "xttypes.h"
 
 
-XTINLINE
+XTAPI
+PVOID
+RtlCopyMemory(IN PVOID Destination,
+              IN PCVOID Source,
+              IN SIZE_T Length);
+
 VOID
 RtlInitializeListHead(IN PLIST_ENTRY ListHead);
 
-XTINLINE
 VOID
 RtlInitializeListHead32(IN PLIST_ENTRY32 ListHead);
 
-XTINLINE
 VOID
 RtlInsertHeadList(IN OUT PLIST_ENTRY ListHead,
                   IN OUT PLIST_ENTRY Entry);
 
-XTINLINE
 VOID
 RtlInsertTailList(IN OUT PLIST_ENTRY ListHead,
                   IN OUT PLIST_ENTRY Entry);
 
-XTINLINE
 BOOLEAN
 RtlListEmpty(PLIST_ENTRY ListHead);
 
+XTAPI
+SIZE_T
+RtlSameMemory(IN PCVOID LeftBuffer,
+              IN PCVOID RightBuffer,
+              IN SIZE_T Length);
+
 INT
 RtlWideStringCompare(IN CONST PWCHAR String1,
                      IN CONST PWCHAR String2,
diff --git a/sdk/xtklib/rtl/memory.c b/sdk/xtklib/rtl/memory.c
new file mode 100644
index 0000000..d45ced2
--- /dev/null
+++ b/sdk/xtklib/rtl/memory.c
@@ -0,0 +1,95 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            sdk/xtklib/rtl/memory.c
+ * DESCRIPTION:     Memory related routines
+ * DEVELOPERS:      Rafal Kupiec <belliash@codingworkshop.eu.org>
+ */
+
+#include <xtkmapi.h>
+
+
+/**
+ * This routine copies a block of memory.
+ *
+ * @param Destination
+ *        Supplies a pointer to the buffer where data will be copied to.
+ *
+ * @param Source
+ *        Supplies a pointer to the source buffer that will be copied.
+ *
+ * @param Length
+ *        Specifies the number of bytes to copy.
+ *
+ * @return Returns the destination pointer.
+ *
+ * @since NT 3.5
+ */
+XTAPI
+PVOID
+RtlCopyMemory(IN PVOID Destination,
+              IN PCVOID Source,
+              IN SIZE_T Length)
+{
+    PCHAR DestinationBytes = (PCHAR)Destination;
+    PCHAR SourceBytes = (PCHAR)Source;
+
+    /* Forward buffer copy */
+    while(Length--)
+    {
+        *DestinationBytes++ = *SourceBytes++;
+    }
+
+    /* Return pointer to destination buffer */
+    return Destination;
+}
+
+/**
+ * This routine compares the first bytes of the specified memory buffers.
+ *
+ * @param LeftBuffer
+ *        Supplies a pointer to the first block of memory to compare.
+ *
+ * @param RightBuffer
+ *        Supplies a pointer to the second block of memory to compare.
+ *
+ * @param Length
+ *        Specifies a number of bytes to compare.
+ *
+ * @return A value indicating the relationship between the content of the memory blocks.
+ *         It returns zero (0) if both memory blocks are equal or a value different than
+ *         zero representing which is greater if they do not match.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+SIZE_T
+RtlSameMemory(IN PCVOID LeftBuffer,
+              IN PCVOID RightBuffer,
+              IN SIZE_T Length)
+{
+    CONST UCHAR *Left = (PUCHAR)LeftBuffer;
+    CONST UCHAR *Right = (PUCHAR)RightBuffer;
+
+    /* Check if there is anything to compare */
+    if(Length)
+    {
+        /* Iterate through whole buffer length */
+        while(Length--)
+        {
+            /* Compare bytes from both bufers */
+            if(*Left != *Right)
+            {
+                /* Buffers differ */
+                return (*Left - *Right);
+            }
+
+            /* Advance to next byte */
+            Left++;
+            Right++;
+        }
+    }
+
+    /* Buffers equal */
+    return 0;
+}
diff --git a/sdk/xtklib/rtl/plist.c b/sdk/xtklib/rtl/plist.c
index 2c3a315..78aef2e 100644
--- a/sdk/xtklib/rtl/plist.c
+++ b/sdk/xtklib/rtl/plist.c
@@ -19,7 +19,6 @@
  *
  * @since XT 1.0
  */
-XTINLINE
 VOID
 RtlInitializeListHead(IN PLIST_ENTRY ListHead)
 {
@@ -37,7 +36,6 @@ RtlInitializeListHead(IN PLIST_ENTRY ListHead)
  *
  * @since XT 1.0
  */
-XTINLINE
 VOID
 RtlInitializeListHead32(IN PLIST_ENTRY32 ListHead)
 {
@@ -58,7 +56,6 @@ RtlInitializeListHead32(IN PLIST_ENTRY32 ListHead)
  *
  * @since XT 1.0
  */
-XTINLINE
 VOID
 RtlInsertHeadList(IN OUT PLIST_ENTRY ListHead,
                   IN OUT PLIST_ENTRY Entry)
@@ -82,7 +79,6 @@ RtlInsertHeadList(IN OUT PLIST_ENTRY ListHead,
  *
  * @since XT 1.0
  */
-XTINLINE
 VOID
 RtlInsertTailList(IN OUT PLIST_ENTRY ListHead,
                   IN OUT PLIST_ENTRY Entry)
@@ -103,7 +99,6 @@ RtlInsertTailList(IN OUT PLIST_ENTRY ListHead,
  *
  * @since XT 1.0
  */
-XTINLINE
 BOOLEAN
 RtlListEmpty(PLIST_ENTRY ListHead)
 {