/// <summary>
/// Extract data from an unpatched ROM file, for inclusion in a patch file.
/// </summary>
private static bool TryGenerateBaseline(string patchPath, string romPath)
{
SRecordReader reader = new SRecordReader(patchPath);
Stream romStream = File.OpenRead(romPath);
Patcher patcher = new Patcher(reader, romStream);
if (!patcher.TryReadPatches())
{
return(false);
}
// Handy for manual work, but with this suppressed, you can append-pipe the output to the patch file.
// Console.WriteLine("Generating baseline SRecords for:");
// patcher.PrintPatches();
return(patcher.TryPrintBaselines());
}
/// <summary>
/// Determine whether a patch is suitable for a ROM, and optionally apply the patch if so.
/// </summary>
private static bool TryApply(string patchPath, string romPath, bool apply, bool commit)
{
SRecordReader reader = new SRecordReader(patchPath);
Stream romStream;
string workingPath = romPath + ".temp";
if (commit)
{
File.Copy(romPath, workingPath, true);
romStream = File.Open(workingPath, FileMode.Open, FileAccess.ReadWrite, FileShare.None);
}
else
{
romStream = File.OpenRead(romPath);
}
Patcher patcher = new Patcher(reader, romStream);
if (!patcher.TryReadPatches())
{
return(false);
}
Console.WriteLine("This patch file was intended for: {0}.", patcher.InitialCalibrationId);
Console.WriteLine("This patch file converts ROM to: {0}.", patcher.FinalCalibrationId);
if (!apply)
{
Console.WriteLine("Preparing to remove patch.");
patcher.TryReversePatches();
}
if (!patcher.TryVerifyExpectedData())
{
if (apply)
{
Console.WriteLine("This patch file can NOT be applied to this ROM file.");
}
else
{
Console.WriteLine("This patch file was NOT previously applied to this ROM file.");
}
return(false);
}
if (apply)
{
Console.WriteLine("This patch file can be applied to this ROM file.");
}
else
{
Console.WriteLine("This patch file was previously applied to this ROM file.");
}
if (!commit)
{
return(true);
}
if (apply)
{
Console.WriteLine("Applying patch.");
}
else
{
Console.WriteLine("Removing patch.");
}
if (patcher.TryApplyPatches())
{
reader.Dispose();
romStream.Dispose();
Console.WriteLine("Verifying patch.");
using (Verifier verifier = new Verifier(patchPath, workingPath, apply))
{
if (!verifier.TryVerify(patcher.Patches))
{
Console.WriteLine("Verification failed, ROM file not modified.");
return(false);
}
}
File.Copy(workingPath, romPath, true);
Console.WriteLine("ROM file modified successfully.");
}
else
{
Console.WriteLine("The ROM file has not been modified.");
}
return(true);
}
