/// <summary>
/// Returns a stream pointed to the decompressed file at the given address
/// </summary>
/// <param name="virtualAddress"></param>
/// <param name="recordCopy"></param>
/// <returns></returns>
public RomFile GetFile(long virtualAddress)
{
FileRecord record; //file we're looking up
if (!DmaTable.TryGetValue(virtualAddress, out record))
{
throw new Exception();
}
return(GetFile(new FileRecord(record)));
}
/// <summary>
/// Gets the virtual FileAddress of a file with a given start address
/// </summary>
/// <param name="address">The file's VROM address. Must match FileAddress's Vrom.Start</param>
/// <returns>The returned FileAddress</returns>
public FileAddress GetVRomAddress(long address)
{
FileRecord record;
if (!DmaTable.TryGetValue(address, out record))
{
throw new FileNotFoundException();
}
return(record.VirtualAddress);
}
/// <summary>
/// Tries to return the virtual FileAddress of a file with a given start address
/// </summary>
/// <param name="address">The file's VROM address. Must match FileAddress's Vrom.Start</param>
/// <param name="resultAddress">The returned FileAddress</param>
/// <returns>True if the operation is successful</returns>
public bool TryGetVirtualAddress(long address, out FileAddress resultAddress)
{
FileRecord record;
bool getValue;
getValue = DmaTable.TryGetValue(address, out record);
if (getValue)
{
resultAddress = record.VirtualAddress;
}
else
{
resultAddress = new FileAddress();
}
return(getValue);
}
/// <summary>
/// Returns a stream pointed to the decompressed file at the given address
/// </summary>
/// <param name="virtualAddress"></param>
/// <returns></returns>
public RomFile GetFile(FileAddress virtualAddress)
{
FileRecord record, temp;
temp = new FileRecord(virtualAddress, new FileAddress(virtualAddress.Start, 0), -1);
if (DmaTable.TryGetValue(virtualAddress.Start, out record))
{
if (virtualAddress.Size != record.VirtualAddress.Size)
{
record = temp;
}
}
else
{
record = temp;
}
return(GetFile(record));
}
/// <summary>
/// Returns a file without attempting to decompress it.
/// </summary>
/// <param name="virtualAddress">Address containing the location of the file</param>
/// <returns></returns>
public Stream GetPhysicalFile(long virtualAddress)
{
MemoryStream ms;
byte[] data;
FileRecord tableRecord; //file we're looking up
if (!DmaTable.TryGetValue(virtualAddress, out tableRecord))
{
throw new Exception();
}
using (FileStream fs = new FileStream(RomLocation, FileMode.Open, FileAccess.Read))
{
data = new byte[tableRecord.DataAddress.Size];
fs.Position = tableRecord.DataAddress.Start;
fs.Read(data, 0, (int)tableRecord.DataAddress.Size);
}
return(ms = new MemoryStream(data));
}
/// <summary>
/// Tries to get the full FileRecord for a file with the given starting virtual address
/// </summary>
/// <param name="virtualAddress">The virtual address of the record to return.</param>
/// <param name="record">Returns the full FileRecord for that file</param>
/// <returns>True if operation is successful</returns>
public bool TryGetFileRecord(long virtualAddress, out FileRecord record)
{
return(DmaTable.TryGetValue(virtualAddress, out record));
}
/// <summary>
/// Tries to get the full FileRecord for a file with the given virtual FileAddress
/// </summary>
/// <param name="virtualAddress">The virtual FileAddress of the record to return. Does not verify end address</param>
/// <param name="record">Returns the full FileRecord for that file</param>
/// <returns>True if operation is successful</returns>
public bool TryGetFileRecord(FileAddress virtualAddress, out FileRecord record)
{
return(DmaTable.TryGetValue(virtualAddress.Start, out record));
}
/// <summary>
/// Returns the full FileRecord for a file that contains the given address
/// </summary>
/// <param name="virtualAddress"></param>
/// <returns>The FileRecord of the containing file, or null if no file contains the given address</returns>
public FileRecord GetFileStart(long virtualAddress)
{
return(DmaTable.FirstOrDefault(x => x.Value.VirtualAddress.Start <= virtualAddress &&
virtualAddress < x.Value.VirtualAddress.End).Value);
}
