public static List <HackSignature <PatchFootprint> > GeneratePatchHistory(string originalEXE, string modifiedEXE, int maxGapSize = 16)
{
var p = new HackSignature <PatchFootprint>(new HackSettings(Path.GetFileName(modifiedEXE), "Generated Patch History"));
using var oribr = new BinaryReader(new FileStream(originalEXE, FileMode.Open, FileAccess.Read));
using var modbr = new BinaryReader(new FileStream(modifiedEXE, FileMode.Open, FileAccess.Read));
while (oribr.BaseStream.Position != oribr.BaseStream.Length)
{
//scan for a change
while (oribr.BaseStream.Position < oribr.BaseStream.Length && oribr.ReadByte() == modbr.ReadByte())
{
;
}
//stop if reaches the end of stream
if (oribr.BaseStream.Position == oribr.BaseStream.Length)
{
break;
}
ulong address = (ulong)(oribr.BaseStream.Position - 1);
//store the length
ulong length = 1;
int gapBuffer = maxGapSize;
bool wasDifference;
while (oribr.BaseStream.Position < oribr.BaseStream.Length && ((wasDifference = oribr.ReadByte() != modbr.ReadByte()) || gapBuffer > 0))
{
length++;
gapBuffer = (wasDifference) ? maxGapSize : gapBuffer - 1;
}
length -= (ulong)(maxGapSize - gapBuffer);
//add the patch
p.Patches.Add(new PatchFootprint(address, length));
}
return(new List <HackSignature <PatchFootprint> >()
{
p
});
}
public static HackFootprint Create <T>(HackSignature <T> missingHack) where T : IPatchFootprint
{
IPatchFootprint[] p = new IPatchFootprint[missingHack.Patches.Count];
missingHack.Patches.ToArray().CopyTo(p, 0);
return(new HackFootprint(missingHack.Settings, p));
}
