/// <summary>
/// Get up-to-date CRC32 values for the ROM.
/// </summary>
/// <param name="romPath">Absolute path to the ROM.</param>
/// <param name="cfgPath">Absolute path to the configuration file (may be <c>null</c>).</param>
/// <param name="cfgCrc">Receives the CRC32 of the file at <paramref name="cfgPath"/></param>
/// <returns>The CRC32 of the file at <paramref name="romPath"/>.</returns>
internal static uint GetCrcs(string romPath, string cfgPath, out uint cfgCrc)
{
bool dontCare;
var romCrc = GetCrcs(LuigiFileHeader.GetHeader(romPath), romPath, cfgPath, out cfgCrc, out dontCare);
return(romCrc);
}
/// <summary>
/// Safely retrieves the LUIGI header for a ROM.
/// </summary>
/// <param name="rom">The ROM whose LUIGI header is requested.</param>
/// <returns>The <see cref="LuigiFileHeader"/> for the ROM, or <c>null</c> if the ROM is not in the LUIGI format.</returns>
public static LuigiFileHeader GetLuigiHeader(this IRom rom)
{
LuigiFileHeader luigiHeader = null;
if ((rom != null) && (rom.Format == RomFormat.Luigi) && !string.IsNullOrEmpty(rom.RomPath) && StreamUtilities.FileExists(rom.RomPath) && LuigiFileHeader.PotentialLuigiFile(rom.RomPath))
{
luigiHeader = LuigiFileHeader.GetHeader(rom.RomPath);
}
return(luigiHeader);
}
/// <summary>
/// Examines the given file and attempts to determine if it is a program in .luigi format.
/// </summary>
/// <param name="filePath">The path to the LUIGI file.</param>
/// <returns>A valid LuigiFormatRom if file is a valid .luigi file, otherwise <c>null</c>.</returns>
internal static LuigiFormatRom Create(string filePath)
{
LuigiFormatRom rom = null;
if (CheckFormat(filePath) == RomFormat.Luigi)
{
LuigiFileHeader header = LuigiFileHeader.GetHeader(filePath);
if (header != null)
{
rom = new LuigiFormatRom()
{
Format = RomFormat.Luigi, IsValid = true, RomPath = filePath, Header = header
};
}
}
return(rom);
}
/// <summary>
/// Checks the format of the ROM at the given absolute path.
/// </summary>
/// <param name="filePath">Absolute path to a ROM file.</param>
/// <returns>The format of the ROM.</returns>
internal static RomFormat CheckFormat(string filePath)
{
var format = CheckMemo(filePath);
if (format == RomFormat.None)
{
using (var file = StreamUtilities.OpenFileStream(filePath))
{
if (file != null)
{
if (file.Length > 0)
{
if (LuigiFileHeader.GetHeader(filePath) != null)
{
format = RomFormat.Luigi;
AddMemo(filePath, format);
}
}
}
}
}
return(format);
}
