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  1. using System;
  2.  
  3. class Program
  4. {
  5.     public static void Main()
  6.     {
  7.         Console.WriteLine("IntPtr.Size: {0}", IntPtr.Size);
  8.         Console.WriteLine();
  9.  
  10.         // Two rounds, with positive and with negative numbers        
  11.         long test1 = 0x12340000 /* y */ | 0x00005678 /* x */;
  12.         long test2 = 0xDCBA0000 /* y */ | 0x00009876 /* x */;
  13.  
  14.         foreach (long temp in new[] { test1, test2})
  15.         {
  16.             long test = temp;
  17.  
  18.             if (IntPtr.Size == 8)
  19.             {
  20.                 // We "pad" the number so that all the 64 bits are full and a 
  21.                 // standard (int)xy conversion will fail.
  22.                 test = unchecked((long)((ulong)test | 0xFFFFFFFF00000000ul));
  23.             }
  24.  
  25.             IntPtr xy = (IntPtr)test;
  26.  
  27.             int x = unchecked((short)(long)xy);
  28.             int y = unchecked((short)((long)xy >> 16));
  29.  
  30.             // Other way, more similar to WinAPI
  31.             ushort loword = unchecked((ushort)(ulong)xy);
  32.             ushort hiword = unchecked((ushort)((ulong)xy >> 16));
  33.  
  34.             int x2 = unchecked((int)(short)loword);
  35.             int y2 = unchecked((int)(short)hiword);
  36.  
  37.             Console.WriteLine("xy: {0:X}", unchecked((ulong)(long)xy));
  38.             Console.WriteLine("x: {0:X}, decimal: {1}, other way: {2:X}, ushort other way: {3:X}", x, x, x2, unchecked((ushort)x2));
  39.             Console.WriteLine("y: {0:X}, decimal: {1}, other way: {2:X}, ushort other way: {3:X}", y, y, y2, unchecked((ushort)y2));
  40.             Console.WriteLine();
  41.         }
  42.     }
  43. }
Success #stdin #stdout 0.03s 33912KB
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stdin
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Standard input is empty
stdout
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IntPtr.Size: 4

xy: 12345678
x: 5678, decimal: 22136, other way: 5678, ushort other way: 5678
y: 1234, decimal: 4660, other way: 1234, ushort other way: 1234

xy: FFFFFFFFDCBA9876
x: FFFF9876, decimal: -26506, other way: FFFF9876, ushort other way: 9876
y: FFFFDCBA, decimal: -9030, other way: FFFFDCBA, ushort other way: DCBA
https://ideone.com/a4oGW2
language:
C# (gmcs 5.20.1)
created:
11 years ago
visibility:
public

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