protected virtual void LoadFromStream(Stream stream)
{
var secSize = 128 << (SectorSizeCode & 3);
var cylSize = GetSectorMap(0, 0).Length *secSize * 2;
var cylCount = (int)(stream.Length / cylSize);
if ((stream.Length % cylSize) > 0L)
{
cylCount += 1;
}
m_diskImage.SetPhysics(cylCount, 2);
for (var c = 0; c < m_diskImage.CylynderCount; c++)
{
for (var h = 0; h < m_diskImage.SideCount; h++)
{
var sectorList = new List <Sector>();
var il = GetSectorMap(c, h);
for (var s = 0; s < il.Length; s++)
{
var sector = new SimpleSector(
c,
h,
il[s],
SectorSizeCode & 3,
new byte[secSize]);
stream.Read(sector.Data, 0, sector.Data.Length);
sector.SetAdCrc(true);
sector.SetDataCrc(true);
sectorList.Add(sector);
}
m_diskImage
.GetTrackImage(c, h)
.AssignSectors(sectorList);
}
}
m_diskImage.ModifyFlag = ModifyFlag.None;
}
private void loadFromStream(Stream stream)
{
var crc = CrcUdi.InitValue;
var hdr = new byte[16];
stream.Seek(0, SeekOrigin.Begin);
stream.Read(hdr, 0, hdr.Length);
crc = CrcUdi.Update(crc, hdr, 0, hdr.Length);
if (Encoding.ASCII.GetString(hdr, 0, 4) != "UDI!") // check "UDI!"
{
Locator.Resolve <IUserMessage>()
.Error("UDI loader\n\nUnknown *.UDI file identifier!");
return;
}
var size = hdr[4] | hdr[5] << 8 | hdr[6] << 16 | hdr[7] << 24;
if (stream.Length != (size + 4))
{
Locator.Resolve <IUserMessage>()
.Error("UDI loader\n\nCorrupt *.UDI file!");
return;
}
if (hdr[8] != 0)
{
Locator.Resolve <IUserMessage>()
.Error("UDI loader\n\nUnsupported *.UDI format version!");
return;
}
var cylCount = hdr[9] + 1;
var sideCount = hdr[0x0A] + 1;
var hdr2len = hdr[0x0C] | hdr[0x0D] << 8 | hdr[0x0E] << 16 | hdr[0x0F] << 24;
_diskImage.SetPhysics(cylCount, sideCount);
if (hdr2len > 0)
{
byte[] hdr2 = new byte[hdr2len];
stream.Read(hdr2, 0, hdr2len);
crc = CrcUdi.Update(crc, hdr2, 0, hdr2.Length);
}
// f.Seek(16 + hdr2len, SeekOrigin.Begin);
for (var cyl = 0; cyl < cylCount; cyl++)
{
for (var side = 0; side < sideCount; side++)
{
stream.Read(hdr, 0, 3);
crc = CrcUdi.Update(crc, hdr, 0, 3);
var trackType = hdr[0];
var trackSize = hdr[1] | hdr[2] << 8;
var image = new byte[2][];
image[0] = new byte[trackSize];
image[1] = new byte[trackSize / 8 + (((trackSize & 7) != 0) ? 1 : 0)];
stream.Read(image[0], 0, image[0].Length);
crc = CrcUdi.Update(crc, image[0], 0, image[0].Length);
stream.Read(image[1], 0, image[1].Length);
crc = CrcUdi.Update(crc, image[1], 0, image[1].Length);
_diskImage.GetTrackImage(cyl, side)
.AssignImage(image[0], image[1]);
}
}
// check CRC
stream.Read(hdr, 0, 4);
var stampCrc = (UInt32)(hdr[0] | hdr[1] << 8 | hdr[2] << 16 | hdr[3] << 24);
if (stampCrc != crc)
{
Locator.Resolve <IUserMessage>()
.Warning(
"UDI loader\n\nCRC ERROR:\nStamp: {0:X8}\nReal: {1:X8}",
stampCrc,
crc);
}
}
