public void RawRead(string file, uint offset, uint length, IntPtr dest, ref uint bytesRead) {
DirectoryEntry e;
if (_lookup.TryGetValue(file, out e)) {
if ((e.Flags & FileFlags.COMPRESSION_FLAGS) != 0) {
var cache = GetCache(e);
uint readLen = Math.Min(length, (uint)cache.Data.Length - offset);
System.Runtime.InteropServices.Marshal.Copy(cache.Data, (int)offset, dest, (int)readLen);
bytesRead = readLen;
if (readLen == 0) {
System.Diagnostics.Debug.WriteLine("IrosArc RawRead file {0} offset {1} length {2} read {3} bytes - cache data size {4}", file, offset, length, readLen, cache.Data.Length);
}
} else {
uint readLen = Math.Min(length, (uint)e.Length - offset);
long Loffset = offset + e.Offset;
Win32.OVERLAPPED ov = new Win32.OVERLAPPED() {
EventHandle = IntPtr.Zero,
Internal = UIntPtr.Zero,
InternalHigh = UIntPtr.Zero,
Offset = (uint)(Loffset & 0xffffffff),
OffsetHigh = (uint)(Loffset >> 32)
};
Win32.ReadFile(_data.Handle, dest, readLen, ref bytesRead, ref ov);
}
} else
bytesRead = 0;
}
public override void Read(uint offset, uint length, IntPtr dest, ref uint bytesRead)
{
Win32.OVERLAPPED ov = new Win32.OVERLAPPED()
{
EventHandle = IntPtr.Zero,
Internal = UIntPtr.Zero,
InternalHigh = UIntPtr.Zero,
Offset = Offset + offset,
OffsetHigh = 0
};
Win32.ReadFile(Handle, dest, length, ref bytesRead, ref ov);
}
private unsafe void Recalculate()
{
DebugLogger.WriteLine($"Chunked file {Name} recalculating contents...");
byte[] original = new byte[_fbLen];
Win32.OVERLAPPED ov = new Win32.OVERLAPPED()
{
EventHandle = IntPtr.Zero,
Internal = UIntPtr.Zero,
InternalHigh = UIntPtr.Zero,
Offset = _fbOffset,
OffsetHigh = 0
};
fixed(byte *bp = &original[0])
{
uint bytesRead = 0;
//TODO should loop...
Win32.ReadFile(_fbHandle, new IntPtr(bp), (uint)_fbLen, ref bytesRead, ref ov);
}
DebugLogger.WriteLine($"Original read {_fbLen} from {_fbOffset} sig {original[0]} {original[1]} {original[2]} {original[3]}");
var orig = FieldFile.Unchunk(original);
foreach (int i in Enumerable.Range(0, orig.Count))
{
string fn = Name + ".chunk." + (i + 1);
foreach (var of in _mods.SelectMany(m => m.GetOverrides(fn)))
{
if (of.CFolder == null || of.CFolder.IsActive(of.CName))
{
if (of.Archive == null)
{
orig[i] = System.IO.File.ReadAllBytes(of.File);
}
else
{
orig[i] = of.Archive.GetBytes(of.File);
}
break;
}
}
}
_calculated = FieldFile.Chunk(orig);
Bytes.WriteInt(_header, 20, _calculated.Length);
DebugLogger.WriteLine($"New length of {Name} is {_calculated.Length}");
}
public bool TryReadFile(string path, string name, uint offset, uint length, IntPtr data, ref uint numBytesRead)
{
LoadedFile lf = GetLF(path, name);
if (lf.Missing)
{
return(false);
}
lf.Tag = DateTime.Now;
Win32.OVERLAPPED ov = new Win32.OVERLAPPED()
{
EventHandle = IntPtr.Zero,
Internal = UIntPtr.Zero,
InternalHigh = UIntPtr.Zero,
Offset = offset,
OffsetHigh = 0
};
System.Diagnostics.Debug.WriteLine("Attempting to read {0} bytes at offset {1} from {2}", length, offset, name);
Win32.ReadFile(lf.Handle, data, length, ref numBytesRead, ref ov);
System.Diagnostics.Debug.WriteLine("# bytes read: " + numBytesRead);
return(true);
}
public override void Read(uint offset, uint length, IntPtr dest, ref uint bytesRead)
{
//DebugLogger.WriteLine("Conditional {2} reading from OS {0} L {1}", offset, length, Name);
bool header = (offset < 24);
bool init = (offset == 24);
if ((!_lastHeader && header) || (init && !_lastInit)) //re-evaluate
{
_current = null;
if (!_handle.Equals(IntPtr.Zero))
{
Win32.CloseHandle(_handle);
}
_handle = IntPtr.Zero;
foreach (var of in _files)
{
if (of.CFolder == null || of.CFolder.IsActive(of.CName))
{
DebugLogger.WriteLine($"Conditional {Name} switching to {of.File}");
_current = of;
Bytes.WriteInt(_header, 20, of.Size);
break;
}
}
if (_current == null)
{
DebugLogger.WriteLine($"Conditional {Name} switching to fallback");
}
_lastInit = true; //we're ready to read file headers
}
else
{
_lastInit = init;
}
if (_current != null && _handle.Equals(IntPtr.Zero) && _current.Archive == null)
{
_handle = Wrap.CreateFileW(_current.File, System.IO.FileAccess.Read, System.IO.FileShare.Read, IntPtr.Zero, System.IO.FileMode.Open, System.IO.FileAttributes.Normal, IntPtr.Zero);
}
_lastHeader = header;
_access = DateTime.Now;
if (_current == null) //read from fallback
//DebugLogger.WriteLine("Conditional reading from fallback handle {0} with extra offset {1}", _fallbackHandle, _fallbackOffset);
{
Win32.OVERLAPPED ov = new Win32.OVERLAPPED()
{
EventHandle = IntPtr.Zero,
Internal = UIntPtr.Zero,
InternalHigh = UIntPtr.Zero,
Offset = _fallbackOffset + offset,
OffsetHigh = 0
};
Win32.ReadFile(_fallbackHandle, dest, length, ref bytesRead, ref ov);
//DebugLogger.WriteLine("Conditional {1} reading from fallback - {0} bytes read", bytesRead, Name);
}
else
{
if (offset < 24)
{
length = Math.Min(length, 24 - offset);
System.Runtime.InteropServices.Marshal.Copy(_header, (int)offset, dest, (int)length);
bytesRead = length;
//DebugLogger.WriteLine("Conditional {2} reading from cheader - {0} bytes read [current size is {1}]", bytesRead, BitConverter.ToInt32(_header, 20), Name);
return;
}
else
{
offset -= 24;
if (_current.Archive == null)
{
Wrap.SetFilePointer(_handle, (int)offset, IntPtr.Zero, Wrap.EMoveMethod.Begin);
Win32.ReadFile(_handle, dest, length, ref bytesRead, IntPtr.Zero);
//DebugLogger.WriteLine("Conditional {1} reading from cfile - {0} bytes read", bytesRead, Name);
}
else
{
_current.Archive.RawRead(_current.File, offset, length, dest, ref bytesRead);
//DebugLogger.WriteLine("Conditional {1} reading from cfile archive offset {2} length {3} - {0} bytes read", bytesRead, Name, offset, length);
}
}
}
}