1.using System;
2.using System.Collections.Generic;
3.using System.Linq;
4.using System.Text;
5.
6.namespace opcodefinder
7.{
8. public class Program
9. {
10. static void Main(string[] args)
11. {
12. Console.WriteLine("Opcode: ");
13. Console.WriteLine(CalcOffsetFromOpcode403(Convert.ToUInt32(Console.ReadLine())));
14. Console.WriteLine("Offset: ");
15. Console.WriteLine(CalcOpcodeFromOffset403(Convert.ToInt32(Console.ReadLine())));
16.
17. }
18.
19. public static uint CalcOffsetFromOpcode403(uint opcode)
20. {
21. // 4.0.3.13329 (Pseucode)
22. // v6 & 3 | ((v6 & 8 | ((v6 & 0x20 | ((v6 & 0x300 | (v6 >> 1) & 0x7C00) >> 2)) >> 1)) >> 1)
23. uint offset403a = opcode & 3 | ((opcode & 8 | ((opcode & 0x20 | ((opcode & 0x300 | (opcode >> 1) & 0x7C00) >> 2)) >> 1)) >> 1);
24. //return ((offset403a * 4) + 0x560);
25.
26. return ((offset403a * 4) + 0x560);
27. }
28.
29. public static int CalcOpcodeFromOffset403(uint offset)
30. {
31. // Count all OFFSETS for OPCODES to 0xFFFF
32. for (uint i = 0; i < 0xFFFF; ++i)
33. {
34. /* Here are additional conditions to calculate the
35. * OPCODE from the associated OFFSET.
36. */
37.
38. // Additional condition FROM 4.0.3.13329
39. if ((i & 0xCF07) != 0x800)
40. {
41. if ((i & 0x4D4) == 0x454 && CalcOffsetFromOpcode403(i) == offset)
42. return (int)i;
43. }
44. }
45. return -1;
46. }
47. }
48.}