private static async ValueTask <EInputBlockResult> VerifyRomCRCAsync(IRomData romData)
{
Console.WriteLine("Disassembling ROM.");
Console.WriteLine();
var data = await romData.GetDataAsync();
switch (Crc.HasCorrectCrc(data.Span, out var crc))
{
case false:
Console.WriteLine("ROM has invalid CRC values.");
Console.WriteLine($"Expected CRC1: 0x{crc.Crc1:X8}, Actual CRC1: 0x{romData.Header.Crc1:X8}");
Console.WriteLine($"Expected CRC2: 0x{crc.Crc1:X8}, Actual CRC2: 0x{romData.Header.Crc2:X8}");
break;
case true:
Console.WriteLine("CRC OK.");
break;
case null:
default:
Console.WriteLine("Unable to calculate CRC - unknown boot code.");
break;
}
return(EInputBlockResult.Success);
}
/// <summary>
/// Converts the content in <paramref name="data"/> to the format
/// specified in <paramref name="format"/>.
/// </summary>
/// <remarks>
/// This method will make a copy of the data even if the format is not
/// changed.
/// </remarks>
/// <param name="data">The data to convert to.</param>
/// <param name="format">The format to convert.</param>
/// <param name="cancellationToken">The cancellation token.</param>
public static async ValueTask <IRomData> ConvertToAsync(this IRomData data, ERomFormat format, CancellationToken cancellationToken = default)
{
Guard.IsNotNull(data, nameof(data));
byte[] copy = new byte[data.Length];
var src = await data.GetDataAsync();
src.CopyTo(copy);
ConvertTo(format, copy);
return(await RomData.LoadRomAsync(copy, cancellationToken));
}
/// <summary>
/// Saves <paramref name="romData"/> to disk.
/// </summary>
/// <param name="romData">The data to save.</param>
/// <param name="file">The output file.</param>
/// <param name="cancellationToken">The cancellation token.</param>
public static async Task SaveAsync(this IRomData romData, FileInfo file, CancellationToken cancellationToken = default)
{
Guard.IsNotNull(romData, nameof(romData));
Guard.IsNotNull(file, nameof(file));
cancellationToken.ThrowIfCancellationRequested();
if (file.Directory?.Exists == false)
{
file.Directory.Create();
}
using var fs = file.Open(FileMode.Create, FileAccess.Write, FileShare.None);
await fs.WriteAsync(await romData.GetDataAsync(), cancellationToken);
await fs.FlushAsync();
}
/// <summary>
/// Saves <paramref name="romData"/> to disk, using the metadata of the ROM
/// to generate the output file name.
/// </summary>
/// <param name="romData">The data to save.</param>
/// <param name="outputDirectory">The output directory.</param>
/// <param name="cancellationToken">The cancellation token.</param>
public static async Task SaveAsync(this IRomData romData, DirectoryInfo outputDirectory, CancellationToken cancellationToken)
{
Guard.IsNotNull(romData, nameof(romData));
Guard.IsNotNull(outputDirectory, nameof(outputDirectory));
cancellationToken.ThrowIfCancellationRequested();
if (!outputDirectory.Exists)
{
outputDirectory.Create();
}
string fileName = romData.GetFilename();
var file = new FileInfo(Path.Combine(outputDirectory.FullName, fileName));
using var fs = file.Open(FileMode.Create, FileAccess.Write, FileShare.None);
await fs.WriteAsync(await romData.GetDataAsync(), cancellationToken);
await fs.FlushAsync();
}
