Git conversion: Make reactos the root directory, move rosapps, rostests, wallpapers into modules, and delete rossubsys.

sdk/lib/rtl/byteswap.c

@@ -0,0 +1,97 @@
+/*
+ * COPYRIGHT:       See COPYING in the top level directory
+ * PROJECT:         ReactOS system libraries
+ * FILE:            lib/rtl/byteswap.c
+ * PURPOSE:         Memory functions
+ * PROGRAMMER:      David Welch (welch@mcmail.com)
+ */
+
+/* INCLUDES *****************************************************************/
+
+#include <rtl.h>
+
+#define NDEBUG
+#include <debug.h>
+
+#if defined(_M_IX86)
+/* RtlUlonglongByteSwap is broken and cannot be done in C on x86 */
+#error "Use rtlswap.S!"
+#endif
+
+#undef RtlUlonglongByteSwap
+#undef RtlUlongByteSwap
+#undef RtlUshortByteSwap
+
+/*************************************************************************
+ * RtlUshortByteSwap
+ *
+ * Swap the bytes of an unsigned short value.
+ *
+ * NOTES
+ * Based on the inline versions in Wine winternl.h
+ *
+ * @implemented
+ */
+USHORT
+FASTCALL
+RtlUshortByteSwap(
+    IN USHORT Source)
+{
+#if defined(_M_AMD64)
+    return _byteswap_ushort(Source);
+#else
+    return (Source >> 8) | (Source << 8);
+#endif
+}
+
+
+
+/*************************************************************************
+ * RtlUlongByteSwap    [NTDLL.@]
+ *
+ * Swap the bytes of an unsigned int value.
+ *
+ * NOTES
+ * Based on the inline versions in Wine winternl.h
+ *
+ * @implemented
+ */
+ULONG
+FASTCALL
+RtlUlongByteSwap(
+   IN ULONG Source)
+{
+#if defined(_M_AMD64)
+    return _byteswap_ulong(Source);
+#else
+    return ((ULONG)RtlUshortByteSwap((USHORT)Source) << 16) | RtlUshortByteSwap((USHORT)(Source >> 16));
+#endif
+}
+
+
+/*************************************************************************
+ * RtlUlonglongByteSwap
+ *
+ * Swap the bytes of an unsigned long long value.
+ *
+ * PARAMS
+ *  i [I] Value to swap bytes of
+ *
+ * RETURNS
+ *  The value with its bytes swapped.
+ *
+ * @implemented
+ */
+ULONGLONG FASTCALL
+RtlUlonglongByteSwap(
+    IN ULONGLONG Source)
+{
+#if defined(_M_AMD64)
+    return _byteswap_uint64(Source);
+#else
+    return ((ULONGLONG) RtlUlongByteSwap (Source) << 32) | RtlUlongByteSwap (Source>>32);
+#endif
+}
+
+
+/* EOF */