Author: alanmc
Date: 2007-03-24 12:37:24 -0500 (Sat, 24 Mar 2007)
New Revision: 74941
Modified:
trunk/mcs/class/System/System.Net/IPAddress.cs
Log:
Optimised the SwapInt and SwapLong methods
Modified: trunk/mcs/class/System/System.Net/IPAddress.cs
===================================================================
--- trunk/mcs/class/System/System.Net/IPAddress.cs 2007-03-24 17:05:40 UTC
(rev 74940)
+++ trunk/mcs/class/System/System.Net/IPAddress.cs 2007-03-24 17:37:24 UTC
(rev 74941)
@@ -63,25 +63,23 @@
private static int SwapInt (int number)
{
- byte b0 = (byte) ((number >> 24) & 0xFF);
- byte b1 = (byte) ((number >> 16) & 0xFF);
- byte b2 = (byte) ((number >> 8) & 0xFF);
- byte b3 = (byte) (number & 0xFF);
- return b0 + (b1 << 8) + (b2 << 16) + (b3 << 24);
+ return ((number >> 24) & 0xFF)
+ + (((number >> 16) & 0xFF) << 8)
+ + (((number >> 8) & 0xFF) << 16)
+ + ((number & 0xFF) << 24);
}
- private static long SwapLong (long number)
- {
- byte b0 = (byte) ((number >> 56) & 0xFF);
- byte b1 = (byte) ((number >> 48) & 0xFF);
- byte b2 = (byte) ((number >> 40) & 0xFF);
- byte b3 = (byte) ((number >> 32) & 0xFF);
- byte b4 = (byte) ((number >> 24) & 0xFF);
- byte b5 = (byte) ((number >> 16) & 0xFF);
- byte b6 = (byte) ((number >> 8) & 0xFF);
- byte b7 = (byte) (number & 0xFF);
- return (long) b0 + ((long) b1 << 8) + ((long) b2 << 16)
+ ((long) b3 << 24) + ((long) b4 << 32) + ((long) b5 << 40) + ((long) b6 << 48)
+ ((long) b7 << 56);
- }
+ private static long SwapLong(long number)
+ {
+ return (((number >> 56) & 0xFF)
+ + (((number >> 48) & 0xFF) << 8)
+ + (((number >> 40) & 0xFF) << 16)
+ + (((number >> 32) & 0xFF) << 24)
+ + (((number >> 24) & 0xFF) << 32)
+ + (((number >> 16) & 0xFF) << 40)
+ + (((number >> 8) & 0xFF) << 48)
+ + ((number & 0xFF) << 56));
+ }
public static short HostToNetworkOrder(short host) {
if (!BitConverter.IsLittleEndian)
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