public bool WriteStream(Stream fs, int StartCluster, int Filesize)
{
Log.Info("StartCluster:" + StartCluster.ToString());
int Size = Filesize;
int c = StartCluster;
while (true)
{
var s = c * ClusterPerSector;
var LastSector = 0;
for (var sc = 0; sc < ClusterPerSector; sc++, s++)
{
var Length = Size < DefaultSectorBytes ? Size : DefaultSectorBytes;
DiskImage.GetSector(s).Fill(0x00);
if (Size == 0)
{
continue;
}
var SectorBuffer = DiskImage.GetSectorDataForWrite(s);
fs.Read(SectorBuffer, 0, Length);
Size -= Length;
if (Length > 0)
{
LastSector = sc;
}
}
if (Size == 0)
{
if (Setting.X1SMode && LastSector > 0)
{
LastSector--;
if ((Filesize & 0xff) == 0)
{
LastSector++;
}
}
SetClusterValue(c, LastSector, true);
break;
}
var next = GetNextFreeCluster(2);
if (next < 0)
{
Log.Error($"Too big filesize!: LastClaster={c}");
SetClusterValue(c, LastSector, true);
return(false);
}
SetClusterValue(c, next);
c = next;
}
return(true);
}
/// <summary>
/// ファイル展開
/// </summary>
public void ExtractFile(Stream fs, HuFileEntry fe)
{
int StartCluster = fe.StartCluster;
int Size = fe.Size;
bool AsciiMode = fe.IsAscii;
int c = StartCluster;
int LeftSize = Size;
int TotalOutputBytes = 0;
bool SectorWriteMode = Size == 0;
if (Setting.ForceAsciiMode)
{
AsciiMode = true;
}
if (Setting.ForceBinaryMode)
{
AsciiMode = false;
}
while (true)
{
var end = IsEndCluster(c);
var next = GetClusterValue(c);
if (next == 0x00)
{
Log.Warning("WARNING: Wrong cluster chain!!");
break;
}
// セクタ数
var SectorCount = end ? (next & 0x0f) + 1 : ClusterPerSector;
for (var i = 0; i < SectorCount; i++)
{
var CurrentSector = (c * ClusterPerSector) + i;
var Sector = DiskImage.GetSector(CurrentSector);
var Data = Sector.Data;
var Eof = false;
if (AsciiMode)
{
var AsciiData = ConvertAscii(Sector.Data);
Eof = AsciiData.Eof;
Data = AsciiData.Data;
}
Log.Verbose($"Cluster:{c} Sector:{CurrentSector} Position:0x{Sector.Position:X}");
var OutputBytes = Data.Length;
// セクタ書き込みモード
if (!SectorWriteMode)
{
// セクタサイズか残りのバイト数を書き出す
if (LeftSize < OutputBytes)
{
OutputBytes = LeftSize;
}
LeftSize -= OutputBytes;
}
fs.Write(Data, 0, OutputBytes);
TotalOutputBytes += OutputBytes;
// 次のクラスタに進む
if (Eof)
{
break;
}
}
if (end)
{
break;
}
c = next;
}
}