toolsandutils/e32tools/checklib/misc/endian.cpp
changeset 0 83f4b4db085c
child 1 d4b442d23379
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolsandutils/e32tools/checklib/misc/endian.cpp	Tue Feb 02 01:39:43 2010 +0200
@@ -0,0 +1,38 @@
+// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// Some utility functions for converting between big and little endian.
+// 
+//
+
+#include "endian.h"
+
+
+uint32_t misc::reverse_bytes(uint32_t n)
+{
+    unsigned char b0 = (n >> 0*8) & 0xff;
+    unsigned char b1 = (n >> 1*8) & 0xff;
+    unsigned char b2 = (n >> 2*8) & 0xff;
+    unsigned char b3 = (n >> 3*8) & 0xff;
+
+    return (b0 << 3*8) | (b1 << 2*8) | (b2 << 1*8) | (b3 << 0*8);
+}
+
+uint16_t misc::reverse_bytes(uint16_t n)
+{
+    unsigned char b0 = (n >> 0*8) & 0xff;
+    unsigned char b1 = (n >> 1*8) & 0xff;
+
+    return (b0 << 1*8) | (b1 << 0*8);
+}
+