/// <summary>
/// Determines if the given ROM can execute on a specific device that has the given <paramref name="deviceUniqueId"/>.
/// </summary>
/// <param name="rom">The ROM to check.</param>
/// <param name="deviceUniqueId">The unique device identifier to use to determine if the ROM can execute upon it.</param>
/// <returns><c>true</c> if the ROM can execute on device identified by <paramref name="deviceUniqueId"/>; otherwise, <c>false</c>.</returns>
/// <remarks>By default, all non-LUIGI-format ROMs are assumed to be executable on any device. If <paramref name="rom"/>
/// is a LUIGI-format ROM, and only runs on LTO Flash!, then the following rules apply:
/// 1) If no scramble key block is present, the ROM will execute, regardless of the value if <paramref name="deviceUniqueId"/>
/// 2) If a scramble key block is present, but the TargetDeviceUniqueId contained within it is <see cref="LuigiScrambleKeyBlock.AnyLTOFlashId"/>, the ROM will execute
/// 3) If a scramble key block is present, the ROM is executable only if the ROM's scramble key block contains a TargetDeviceUniqueId that matches <paramref name="deviceUniqueId"/>.</remarks>
public static bool CanExecuteOnDevice(this IRom rom, string deviceUniqueId)
{
var canExecuteOnDevice = true;
if ((rom != null) && !string.IsNullOrEmpty(deviceUniqueId))
{
var luigiRom = Rom.AsSpecificRomType <LuigiFormatRom>(rom);
if (luigiRom != null)
{
var targetDeviceId = luigiRom.TargetDeviceUniqueId;
canExecuteOnDevice = string.IsNullOrEmpty(targetDeviceId) || targetDeviceId.Equals(LuigiScrambleKeyBlock.AnyLTOFlashId) || targetDeviceId.Equals(deviceUniqueId);
}
}
return(canExecuteOnDevice);
}
/// <summary>
/// Gets IProgramInformation from a .ROM-format file's metadata, if it is available.
/// </summary>
/// <param name="rom">The ROM from which metadata-based information is retrieved.</param>
/// <returns>IProgramInformation retrieved from the .ROM-format ROM.</returns>
public static RomFileMetadataProgramInformation GetRomFileMetadata(this IRom rom)
{
RomFileMetadataProgramInformation programInfo = null;
var romRom = Rom.AsSpecificRomType <RomFormatRom>(rom);
if (romRom != null)
{
programInfo = new RomFileMetadataProgramInformation(rom);
if (!programInfo.Metadata.Any())
{
programInfo = null;
}
}
return(programInfo);
}
/// <summary>
/// Gets IProgramInformation from a .BIN-format file's metadata, if it is available.
/// </summary>
/// <param name="rom">The ROM from which metadata-based information is retrieved.</param>
/// <returns>IProgramInformation retrieved from the .BIN-format ROM's .cfg file.</returns>
public static CfgFileMetadataProgramInformation GetBinFileMetadata(this IRom rom)
{
CfgFileMetadataProgramInformation programInfo = null;
var binRom = Rom.AsSpecificRomType <BinFormatRom>(rom);
if (binRom != null)
{
programInfo = new CfgFileMetadataProgramInformation(rom);
if (!programInfo.Metadata.Any())
{
programInfo = null;
}
}
return(programInfo);
}
/// <summary>
/// Gets the original <see cref="IRom"/> referred to by <paramref name="rom"/>.
/// </summary>
/// <param name="rom">The ROM whose original is desired.</param>
/// <returns>The original ROM. Unless <paramref name="rom"/> refers to a ROM located on external devices, and that device is not accessible, this is usually just <paramref name="rom"/>.</returns>
public static IRom OriginalRom(this IRom rom)
{
var originalRom = rom;
var alternateRom = Rom.AsSpecificRomType <AlternateRom>(rom);
if (alternateRom != null)
{
originalRom = alternateRom.Original;
}
else
{
var xmlRom = Rom.AsSpecificRomType <XmlRom>(rom);
if (xmlRom != null)
{
originalRom = xmlRom.ResolvedRom;
}
}
return(originalRom);
}
/// <inheritdoc />
public override int Compare(IRom x, IProgramInformation programInformationRomX, IRom y, IProgramInformation programInformationRomY)
{
var result = base.Compare(x, programInformationRomX, y, programInformationRomY);
if ((result == 0) && (x != null))
{
switch (x.Format)
{
case RomFormat.Bin:
result = CheckCrcs(x, programInformationRomX, y, programInformationRomY);
break;
case RomFormat.Luigi:
result = CheckCrcs(x, programInformationRomX, y, programInformationRomY);
if ((result == 0) && (y.Format == RomFormat.Luigi))
{
// It's possible LUIGI files' original CRCs match, but the LUIGI files themselves do not.
// This once occurred when additional bytes were somehow appended to a downloaded LUIGI. In
// that case, all the CRC data matched, so even the "strict" CRC check, which compared the
// full 8 bytes of the ID in the header, still matched. However, the additional data at the
// end of the corrupted file resulted in failure to load on LTO Flash! hardware. Therefore,
// when comparing what appear to be two identical LUIGI files, still compare full file CRCs.
result = (int)(Rom.AsSpecificRomType <LuigiFormatRom>(x).Crc24 - Rom.AsSpecificRomType <LuigiFormatRom>(y).Crc24);
}
break;
default:
break;
}
}
return(result);
}
/// <summary>
/// Update the config file path of a ROM.
/// </summary>
/// <param name="rom">The ROM whose config file path is being updated.</param>
/// <param name="cfgFile">The new config file path.</param>
public static void UpdateCfgFile(this IRom rom, string cfgFile)
{
Rom.ReplaceCfgPath(rom, cfgFile);
}
