public void AddEntry(string path, IsoEntry e)
{
var tmp = path.IndexOf('/');
if (tmp >= 0)
{
string subpath = path.Substring(tmp + 1).Trim();
path = path.Substring(0, tmp).Trim();
}
}
private string susp_rr_nm(MemoryStream m, string name, byte available, IsoEntry e) // IEEE P1282 Alternate Name ( 4.1.4 )
{
int start = (int)m.Length;
if (m.Length > available)
throw new Exception("buffer overflow - internal design error");
available -= (byte)m.Length;
string cont = "";
byte flags = 0;
if (name == ".")
flags |= 2;
else if (name == "..")
flags |= 4;
else if (name.Length > (available - 5))
{
flags |= 1; // need another entry...
cont = name.Substring(available - 5);
name = name.Substring(0, available - 5);
}
e.RrFlags |= 0x08;
m.WriteByte((byte)'N');
m.WriteByte((byte)'M');
m.WriteByte((byte)(name.Length + 5));
m.WriteByte(1); // version?
m.WriteByte(flags);
m.Write(generator.Ascii.GetBytes(name), 0, name.Length);
System.Diagnostics.Debug.Assert((m.Length - start) == (name.Length + 5));
return cont;
}
private void susp_rr_rr(MemoryStream m, IsoEntry e) // IEEE P1282 Rock Ridge Protocol Identifier ( ? - I can't find this documented, but analysis of iso files reveals it's existence )
{
int start = (int)m.Length;
m.WriteByte((byte)'R');
m.WriteByte((byte)'R');
m.WriteByte(5); // LEN_RR
m.WriteByte(1); // Version
m.WriteByte(e.RrFlags); // flags
System.Diagnostics.Debug.Assert((m.Length - start) == 5);
}
private byte[] Susp(ref string name, IsoEntry e, bool root, bool secondPass, byte available) // IEEE P1282 SUSP
{
MemoryStream m = new MemoryStream();
bool dots = (name == "." || name == "..");
if (!secondPass)
{
if (root)
{
susp_base_sp(m);
susp_base_ce(m);
}
if (e.RrFlags != 0)
susp_rr_rr(m, e);
}
// TODO FIXME - write and generate susp_rr_tf() - timestamps...
if (dots)
name = "";
else if (name.Length > 0)
name = susp_rr_nm(m, name, available, e);
if ((m.Length & 1) != 0) m.WriteByte(0); // padding
byte[] b = m.GetBuffer();
Array.Resize(ref b, (int)m.Length);
return b;
}
private string DirectoryRecordEx(byte[] fileName, string realName, IsoEntry e, byte root, bool secondPass)
{
byte[] /*b_fi,*/ b_su = null;
/*if (fileName == ".")
{
b_fi = new byte[] { 0 };
realName = "";
}
else if (fileName == "..")
{
b_fi = new byte[] { 1 };
realName = "";
}
else
b_fi = generator.Ascii.GetBytes(fileName);*/
byte LEN_FI = (byte)fileName.Length;
byte LEN_DR = (byte)(33 + LEN_FI);
bool fi_padding = ((LEN_DR & 1) != 0);
if (fi_padding) LEN_DR++;
// as much as I HATE to do it, I have to generate this data in both passes for now.
// I don't yet understand enough about what and how many DR entries have to be made to figure out how to do it "right"
byte LEN_SU = 0;
#if ROCKRIDGE
if (root != 1) // don't generate susp on PVD's root entry...
{
b_su = Susp(ref realName, e, root == 2, secondPass, (byte)(255 - LEN_DR));
if (b_su.Length > 255)
throw new NotImplementedException("can't yet handle SUSP > 255 bytes");
LEN_SU = (byte)b_su.Length;
}
else
realName = "";
#endif
LEN_DR += LEN_SU;
var dr = new FieldValidator(generator);
dr.Byte(LEN_DR, 1); // Length of Directory Record ( 9.1.1 )
dr.Byte(0, 2); // Extended Attribute Record Length ( 9.1.2 )
dr.IntLSBMSB(e.DataBlock, 3, 10); // Location of Extent ( 9.1.3 )
#if true
// in this test - I round the data length up to the next multiple of 2048, didn't help fix my booting problem though...
dr.IntLSBMSB(((e.DataLength - 1) / 2048 + 1) * 2048, 11, 18); // Data Length ( 9.1.4 )
#else
dr.IntLSBMSB(e.DataLength, 11, 18); // Data Length ( 9.1.4 )
#endif
dr.BinaryDateTime(System.DateTime.Now, 19, 25); // Recording Date and Time ( 9.1.5 )
byte flags = 0;
if (e.IsFile)
{
IsoFile f = (IsoFile)e;
if ((f.fileInfo.Attributes & FileAttributes.Hidden) != 0)
flags |= 1; // hidden
}
else
{
// TODO FIXME - not supporting hidden folders right now
//IsoFolder f = (IsoFolder)e;
//if ((f.dirInfo.Attributes & DirectoryAttributes.Hidden) != 0)
// flags |= 1; // hidden
}
if (e.IsFolder)
flags |= 2; // directory
#if false // I'm disabling this because analyzing of a working ISO never sets this bit...
if (real_name.Length == 0)
flags |= 128; // final
#endif
dr.Byte(flags, 26); // flags ( 9.1.6 )
dr.Byte(0, 27); // File Unit Size ( 9.1.7 )
dr.Byte(0, 28); // Interleave Gap Size ( 9.1.8 )
dr.ShortLSBMSB(1, 29, 32); // Volume Sequence Number ( 9.1.9 )
dr.Byte(LEN_FI, 33); // Length of File Identifier ( 9.1.10 )
dr.Bytes(fileName, 34, 33 + LEN_FI);
if (fi_padding) dr.Zero(34 + LEN_FI, 34 + LEN_FI);
if (LEN_SU > 0) dr.Bytes(b_su, LEN_DR - LEN_SU + 1, LEN_DR);
return realName;
}
/// <summary>
/// This function is responsible for generating directory records. However, since more than one directory
/// record may be required to get all the information out, it defers the actual directory record generation
/// to a sub-function DirectoryRecordEx().
/// </summary>
/// <param Name="name">The real folder Name</param>
/// <param Name="e">object containing info about the folder</param>
/// <param Name="root">1==PVD's root entry, 2==root's "." entry, 0==everything else ( special stuff needs to happen for the root entries )</param>
private void DirectoryRecord(string name, IsoEntry e, byte root)
{
byte[] fileName = generator.IsoName(name, true);
string cont = DirectoryRecordEx(fileName, name, e, root, false);
#if ROCKRIDGE
while (cont.Length > 0)
{
cont = DirectoryRecordEx(fileName, cont, e, 0, true);
}
#endif
}
