H2Memory/OpCode.cs at master · Kantanomo/H2Memory · GitHub

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using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using System.Linq;
using System.Threading;
using System.Collections;
namespace H2Memory_class
{
    public static class OpCode
    {
        private static bool Patched;
        /// <summary>
        /// Patches xlive.dll integrity check
        /// </summary>
        /// <param name="H2">H2Memory Class</param>
        public static void PatchChecks(H2Memory H2)
        {
            Int32 xliveBase = H2.H2Mem.DLLBaseAddress("xlive.dll");
            //Thanks to Kiwi who made this code because i couldn't find mine!
            for (Int32 i = 0; i <= 0x351000; i += 1)
            {
                byte[] Magic = H2.H2Mem.ReadMem(xliveBase + i, 16, false);
                if (Magic[0] == 0x8b && Magic[1] == 0xec && Magic[2] == 0x83 && Magic[3] == 0xec && Magic[4] == 0x20 && Magic[5] == 0x53 && Magic[6] == 0x56 && Magic[7] == 0x57 && Magic[8] == 0x8d && Magic[9] == 0x45 && Magic[10] == 0xe0 && Magic[11] == 0x33 && Magic[12] == 0xf6 && Magic[13] == 0x50 && Magic[14] == 0xff && Magic[15] == 0x75)//(Magic[15] == 0x74 || Magic[15] == 0x75 || Magic[15] == 0x7F))
                {
                    byte[] mBytes = { 0xc2, 0xc, 0x0 };
                    H2.H2Mem.WriteMem((xliveBase + i) - 3, mBytes, false);
                    Patched = true;
                    break;
                }
                else if (Magic[0] == 0x8b && Magic[1] == 0xec && Magic[2] == 0x83 && Magic[3] == 0xec && Magic[4] == 0x20 && Magic[5] == 0x53 && Magic[6] == 0x56 && Magic[7] == 0x57 && Magic[8] == 0x8d && Magic[9] == 0x45 && Magic[10] == 0xe0 && Magic[11] == 0x33 && Magic[12] == 0xf6 && Magic[13] == 0xc2 && Magic[14] == 0xc && Magic[15] == 0x0)
                    Patched = true;
            }
        }
        /// <summary>
        /// Patches the Ammo subtraction
        /// </summary>
        public static void PatchAmmo(H2Memory H2)
        {
            if (Patched)
            /*
            mov [ecx+06],ax
            to
            nop nop nop nop
                */
            H2.H2Mem.WriteMem(0x15F3EA, new byte[] { 0x90, 0x90, 0x90, 0x90 }, true);
            /*
             add [eax],di
             to
             nop nop nop
             */
            H2.H2Mem.WriteMem(0x15EDA1, new byte[] { 0x90, 0x90, 0x90 }, true);
            /*
            sub [eax+08],si
            to
            nop nop nop nop
            */
            H2.H2Mem.WriteMem(0x160173, new byte[] { 0x90, 0x90, 0x90, 0x90 }, true);
            /*
             movss [edi+00000184],xmm0
             to
             nop nop nop nop nop nop nop nop
             */
            H2.H2Mem.WriteMem(0x15f7c6, new byte[] { 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90 }, true);
        }
        /// <summary>
        /// Patches Grenade reduction
        /// </summary>
        public static void PathGrenades(H2Memory H2)
        {
            /*
             add byte ptr [eax+esi+00000252],ff
             to
             nop nop nop nop nop nop nop nop
             */
            H2.H2Mem.WriteMem(0x1666A8, new byte[] { 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90 , 0x90}, true);
        }
        /// <summary>
        /// Removes automatic check for autocorrecting player speed multiplyer
        /// </summary>
        /// <param name="H2">H2Memory Class</param>
        public static void PatchSpeed(H2Memory H2)
        {
          /*
           movss [edi+00000180],xmm0
           to
           nop nop nop nop nop nop nop nop nop
          */
            if (Patched)
                H2.H2Mem.WriteMem(((H2.HType == H2Type.Halo2Vista) ? 0x6AB7f : 0x6A3BA), new byte[] { 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90 }, true);
        }
        /// <summary>
        /// mov byte ptr [eax],ff / mov byte ptr [eax-01],ff
        /// to
        /// nop nop nop nop nop nop nop
        /// </summary>
        /// <param name="H2">H2Memory Class</param>
        public static void PatchRank(H2Memory H2)
        {
            if (Patched)
                    H2.H2Mem.WriteMem(0x1B2C29, new byte[] { 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90 }, true);
        }
    }
}