Advanced Search

byte swapping using System.Net.IPAddress.NetworkToHostOrder

/ Published in: C#
Save to your folder(s)
This shows how to implement simple byte swapping in C#.

It's shown in the context of assert statements instead of print statements to show the expected results.

Interesting post http://bytes.com/topic/c-sharp/answers/506861-littleendian-bigendian compared performance of various methods. mask-shift-or performed best.

Expand | Embed | Plain Text

Copy this code and paste it in your HTML 
  1. using System.Diagnostics.Debug; // for Assert
  2. using System.Net.IPAddress; // for NetworkToHostOrder
  3.  
  4. Assert(0x12345678 == NetworkToHostOrder(   0x78563412)); // 4-byte
  5. Assert(0x12340000 == NetworkToHostOrder(       0x3412)); // 4-byte
  6. Assert(0x12000000 == NetworkToHostOrder(         0x12)); // 4-byte
  7. Assert(    0x1234 == NetworkToHostOrder((short)0x3412)); // 2-byte
  8. Assert(    0x1200 == NetworkToHostOrder(  (short)0x12)); // 2-byte
  9.  
  10. Assert(0x123456789abcde10 == NetworkToHostOrder(0x10debc9a78563412)); // 8-byte 
  11.  
  12. // using 'unchecked()' to convert large UInt32 values to negative Int32 values.
  13. // See stackoverflow.com/questions/1131843/how-do-i-convert-uint-to-int-in-c 
  14. // In this usage it'ss like the reinterpret cast because bits remain unchanged.
  15. // Without unchecked, a runtime exception will be thrown 
  16. // if the result becomes negative.
  17. Assert( 0xFF1234FF == (UInt32)NetworkToHostOrder(unchecked((Int32)0xFF3412FF)));

Report this snippet


Comments

RSS Icon Subscribe to comments

You need to login to post a comment.