public static PriamTag?DecodePriamTag(byte[] tag)
{
if (tag == null || tag.Length != 24)
{
return(null);
}
PriamTag pmTag = new PriamTag();
BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
byte[] tmp = new byte[4];
pmTag.Version = BigEndianBitConverter.ToUInt16(tag, 0);
pmTag.Kind = (byte)((tag[2] & 0xC0) >> 6);
pmTag.Reserved = (byte)(tag[2] & 0x3F);
pmTag.Volume = tag[3];
pmTag.FileId = BigEndianBitConverter.ToInt16(tag, 4);
pmTag.ValidChk |= (tag[6] & 0x80) == 0x80;
pmTag.UsedBytes = (ushort)(BigEndianBitConverter.ToUInt16(tag, 6) & 0x7FFF);
tmp[0] = 0x00;
tmp[1] = tag[8];
tmp[2] = tag[9];
tmp[3] = tag[10];
pmTag.AbsPage = BigEndianBitConverter.ToUInt32(tmp, 0);
pmTag.Checksum = tag[11];
pmTag.RelPage = BigEndianBitConverter.ToUInt16(tag, 12);
tmp[0] = 0x00;
tmp[1] = tag[14];
tmp[2] = tag[15];
tmp[3] = tag[16];
pmTag.NextBlock = BigEndianBitConverter.ToUInt32(tmp, 0);
tmp[0] = 0x00;
tmp[1] = tag[17];
tmp[2] = tag[18];
tmp[3] = tag[19];
pmTag.PrevBlock = BigEndianBitConverter.ToUInt32(tmp, 0);
pmTag.DiskSize = BigEndianBitConverter.ToUInt32(tag, 20);
pmTag.IsLast = pmTag.NextBlock == 0xFFFFFF;
pmTag.IsFirst = pmTag.PrevBlock == 0xFFFFFF;
return(pmTag);
}
public static PriamTag?DecodeTag(byte[] tag)
{
if (tag == null)
{
return(null);
}
PriamTag pmTag;
switch (tag.Length)
{
case 12:
SonyTag?snTag = DecodeSonyTag(tag);
if (snTag == null)
{
return(null);
}
pmTag = new PriamTag();
pmTag.AbsPage = 0;
pmTag.Checksum = 0;
pmTag.DiskSize = 0;
pmTag.FileId = snTag.Value.FileId;
pmTag.Kind = snTag.Value.Kind;
pmTag.NextBlock = snTag.Value.NextBlock;
pmTag.PrevBlock = snTag.Value.PrevBlock;
pmTag.RelPage = snTag.Value.RelPage;
pmTag.Reserved = snTag.Value.Reserved;
pmTag.UsedBytes = 0;
pmTag.ValidChk = false;
pmTag.Version = snTag.Value.Version;
pmTag.Volume = snTag.Value.Volume;
pmTag.IsFirst = snTag.Value.IsFirst;
pmTag.IsLast = snTag.Value.IsLast;
return(pmTag);
case 20:
ProfileTag?phTag = DecodeProfileTag(tag);
if (phTag == null)
{
return(null);
}
pmTag = new PriamTag();
pmTag.AbsPage = phTag.Value.AbsPage;
pmTag.Checksum = phTag.Value.Checksum;
pmTag.DiskSize = 0;
pmTag.FileId = phTag.Value.FileId;
pmTag.Kind = phTag.Value.Kind;
pmTag.NextBlock = phTag.Value.NextBlock;
pmTag.PrevBlock = phTag.Value.PrevBlock;
pmTag.RelPage = phTag.Value.RelPage;
pmTag.Reserved = phTag.Value.Reserved;
pmTag.UsedBytes = phTag.Value.UsedBytes;
pmTag.ValidChk = phTag.Value.ValidChk;
pmTag.Version = phTag.Value.Version;
pmTag.Volume = phTag.Value.Volume;
pmTag.IsFirst = phTag.Value.IsFirst;
pmTag.IsLast = phTag.Value.IsLast;
return(pmTag);
case 24: return(DecodePriamTag(tag));
default: return(null);
}
}
