public bool Identify(IFilter imageFilter) { Stream stream = imageFilter.GetDataForkStream(); stream.Seek(0, SeekOrigin.Begin); if (stream.Length < Marshal.SizeOf <FdiHeader>()) { return(false); } byte[] hdrB = new byte[Marshal.SizeOf <FdiHeader>()]; stream.Read(hdrB, 0, hdrB.Length); FdiHeader hdr = Marshal.ByteArrayToStructureLittleEndian <FdiHeader>(hdrB); return(hdr.magic.SequenceEqual(_signature)); }
public bool Identify(IFilter imageFilter) { Stream stream = imageFilter.GetDataForkStream(); stream.Seek(0, SeekOrigin.Begin); FdiHeader hdr = new FdiHeader(); if (stream.Length < Marshal.SizeOf(hdr)) { return(false); } byte[] hdrB = new byte[Marshal.SizeOf(hdr)]; stream.Read(hdrB, 0, hdrB.Length); GCHandle handle = GCHandle.Alloc(hdrB, GCHandleType.Pinned); hdr = (FdiHeader)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(FdiHeader)); handle.Free(); return(hdr.magic.SequenceEqual(signature)); }
public bool Open(IFilter imageFilter) { Stream stream = imageFilter.GetDataForkStream(); stream.Seek(0, SeekOrigin.Begin); FdiHeader hdr = new FdiHeader(); if (stream.Length < Marshal.SizeOf(hdr)) { return(false); } byte[] hdrB = new byte[Marshal.SizeOf(hdr)]; stream.Read(hdrB, 0, hdrB.Length); GCHandle handle = GCHandle.Alloc(hdrB, GCHandleType.Pinned); hdr = (FdiHeader)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(FdiHeader)); handle.Free(); DicConsole.DebugWriteLine("UkvFdi plugin", "hdr.addInfoLen = {0}", hdr.addInfoLen); DicConsole.DebugWriteLine("UkvFdi plugin", "hdr.cylinders = {0}", hdr.cylinders); DicConsole.DebugWriteLine("UkvFdi plugin", "hdr.dataOff = {0}", hdr.dataOff); DicConsole.DebugWriteLine("UkvFdi plugin", "hdr.descOff = {0}", hdr.descOff); DicConsole.DebugWriteLine("UkvFdi plugin", "hdr.flags = {0}", hdr.flags); DicConsole.DebugWriteLine("UkvFdi plugin", "hdr.heads = {0}", hdr.heads); stream.Seek(hdr.descOff, SeekOrigin.Begin); byte[] description = new byte[hdr.dataOff - hdr.descOff]; stream.Read(description, 0, description.Length); imageInfo.Comments = StringHandlers.CToString(description); DicConsole.DebugWriteLine("UkvFdi plugin", "hdr.description = \"{0}\"", imageInfo.Comments); stream.Seek(0xE + hdr.addInfoLen, SeekOrigin.Begin); long spt = long.MaxValue; uint[][][] sectorsOff = new uint[hdr.cylinders][][]; sectorsData = new byte[hdr.cylinders][][][]; imageInfo.Cylinders = hdr.cylinders; imageInfo.Heads = hdr.heads; // Read track descriptors for (ushort cyl = 0; cyl < hdr.cylinders; cyl++) { sectorsOff[cyl] = new uint[hdr.heads][]; sectorsData[cyl] = new byte[hdr.heads][][]; for (ushort head = 0; head < hdr.heads; head++) { byte[] sctB = new byte[4]; stream.Read(sctB, 0, 4); stream.Seek(2, SeekOrigin.Current); byte sectors = (byte)stream.ReadByte(); uint trkOff = BitConverter.ToUInt32(sctB, 0); DicConsole.DebugWriteLine("UkvFdi plugin", "trkhdr.c = {0}", cyl); DicConsole.DebugWriteLine("UkvFdi plugin", "trkhdr.h = {0}", head); DicConsole.DebugWriteLine("UkvFdi plugin", "trkhdr.sectors = {0}", sectors); DicConsole.DebugWriteLine("UkvFdi plugin", "trkhdr.off = {0}", trkOff); sectorsOff[cyl][head] = new uint[sectors]; sectorsData[cyl][head] = new byte[sectors][]; if (sectors < spt && sectors > 0) { spt = sectors; } for (ushort sec = 0; sec < sectors; sec++) { byte c = (byte)stream.ReadByte(); byte h = (byte)stream.ReadByte(); byte r = (byte)stream.ReadByte(); byte n = (byte)stream.ReadByte(); SectorFlags f = (SectorFlags)stream.ReadByte(); byte[] offB = new byte[2]; stream.Read(offB, 0, 2); ushort secOff = BitConverter.ToUInt16(offB, 0); DicConsole.DebugWriteLine("UkvFdi plugin", "sechdr.c = {0}", c); DicConsole.DebugWriteLine("UkvFdi plugin", "sechdr.h = {0}", h); DicConsole.DebugWriteLine("UkvFdi plugin", "sechdr.r = {0}", r); DicConsole.DebugWriteLine("UkvFdi plugin", "sechdr.n = {0} ({1})", n, 128 << n); DicConsole.DebugWriteLine("UkvFdi plugin", "sechdr.f = {0}", f); DicConsole.DebugWriteLine("UkvFdi plugin", "sechdr.off = {0} ({1})", secOff, secOff + trkOff + hdr.dataOff); // TODO: This assumes sequential sectors. sectorsOff[cyl][head][sec] = secOff + trkOff + hdr.dataOff; sectorsData[cyl][head][sec] = new byte[128 << n]; if (128 << n > imageInfo.SectorSize) { imageInfo.SectorSize = (uint)(128 << n); } } } } // Read sectors for (ushort cyl = 0; cyl < hdr.cylinders; cyl++) { bool emptyCyl = false; for (ushort head = 0; head < hdr.heads; head++) { for (ushort sec = 0; sec < sectorsOff[cyl][head].Length; sec++) { stream.Seek(sectorsOff[cyl][head][sec], SeekOrigin.Begin); stream.Read(sectorsData[cyl][head][sec], 0, sectorsData[cyl][head][sec].Length); } // For empty cylinders if (sectorsOff[cyl][head].Length != 0) { continue; } if (cyl + 1 == hdr.cylinders || // Next cylinder is also empty sectorsOff[cyl + 1][head].Length == 0) { emptyCyl = true; } // Create empty sectors else { sectorsData[cyl][head] = new byte[spt][]; for (int i = 0; i < spt; i++) { sectorsData[cyl][head][i] = new byte[imageInfo.SectorSize]; } } } if (emptyCyl) { imageInfo.Cylinders--; } } // TODO: What about double sided, half track pitch compact floppies? imageInfo.MediaType = MediaType.CompactFloppy; imageInfo.ImageSize = (ulong)stream.Length - hdr.dataOff; imageInfo.CreationTime = imageFilter.GetCreationTime(); imageInfo.LastModificationTime = imageFilter.GetLastWriteTime(); imageInfo.MediaTitle = Path.GetFileNameWithoutExtension(imageFilter.GetFilename()); imageInfo.SectorsPerTrack = (uint)spt; imageInfo.Sectors = imageInfo.Cylinders * imageInfo.Heads * imageInfo.SectorsPerTrack; imageInfo.XmlMediaType = XmlMediaType.BlockMedia; return(true); }