private CpioArchiveEntry ReadOldAsciiEntry()
{
CpioArchiveEntry ret = new CpioArchiveEntry(CpioConstants.FORMAT_OLD_ASCII);
ret.Device = ReadAsciiLong(6, 8);
ret.Inode = ReadAsciiLong(6, 8);
long mode = ReadAsciiLong(6, 8);
if (mode != 0) {
ret.Mode=mode;
}
ret.UID =ReadAsciiLong(6, 8);
ret.GID=ReadAsciiLong(6, 8);
ret.NumberOfLinks=ReadAsciiLong(6, 8);
ret.RemoteDevice=ReadAsciiLong(6, 8);
ret.Time=ReadAsciiLong(11, 8);
long namesize = ReadAsciiLong(6, 8);
ret.Size=ReadAsciiLong(11, 8);
String name = ReadCString((int) namesize);
ret.Name=name;
if (mode == 0 && !name.Equals(CpioConstants.CPIO_TRAILER)){
throw new IOException("Mode 0 only allowed in the trailer. Found entry: "+ name + " Occured at byte: " + Position);
}
return ret;
}
private CpioArchiveEntry ReadOldBinaryEntry(bool swapHalfWord)
{
CpioArchiveEntry ret = new CpioArchiveEntry (CpioConstants.FORMAT_OLD_BINARY);
ret.Device = ReadBinaryLong (2, swapHalfWord);
ret.Inode = ReadBinaryLong (2, swapHalfWord);
long mode = ReadBinaryLong (2, swapHalfWord);
if (mode != 0) {
ret.Mode = mode;
}
ret.UID = ReadBinaryLong (2, swapHalfWord);
ret.GID = ReadBinaryLong (2, swapHalfWord);
ret.NumberOfLinks = ReadBinaryLong (2, swapHalfWord);
ret.RemoteDevice = ReadBinaryLong (2, swapHalfWord);
ret.Time = ReadBinaryLong (4, swapHalfWord);
long namesize = ReadBinaryLong (2, swapHalfWord);
ret.Size = ReadBinaryLong (4, swapHalfWord);
String name = ReadCString ((int)namesize);
ret.Name = name;
if (mode == 0 && !name.Equals(CpioConstants.CPIO_TRAILER)){
throw new IOException("Mode 0 only allowed in the trailer. Found entry: "+name + "Occured at byte: " + Position);
}
Skip(ret.HeaderPadCount);
return ret;
}
/**
* Reads the next CPIO file entry and positions stream at the beginning of
* the entry data.
*
* @return the CPIOArchiveEntry just read
* @throws IOException
* if an I/O error has occurred or if a CPIO file error has
* occurred
*/
public CpioArchiveEntry GetNextCPIOEntry()
{
EnsureOpen ();
if (this.currentEntry != null) {
CloseEntry ();
}
byte[] magic = new byte[2];
ReadFully (magic, 0, magic.Length);
if (CpioUtil.ByteArray2long (magic, false) == CpioConstants.MAGIC_OLD_BINARY) {
this.currentEntry = ReadOldBinaryEntry (false);
} else if (CpioUtil.ByteArray2long (magic, true) == CpioConstants.MAGIC_OLD_BINARY) {
this.currentEntry = ReadOldBinaryEntry (true);
} else {
byte[] more_magic = new byte[4];
ReadFully (more_magic, 0, more_magic.Length);
byte[] tmp = new byte[6];
System.Array.Copy (magic, tmp, magic.Length);
System.Array.Copy (more_magic, 0, tmp, magic.Length, more_magic.Length);
//System.arraycopy(magic, 0, tmp, 0, magic.length);
//System.arraycopy(more_magic, 0, tmp, magic.length,more_magic.length);
String magicString = UtArrays.ToAsciiString (tmp);
if (magicString.Equals (CpioConstants.MAGIC_NEW)) {
this.currentEntry = ReadNewEntry (false);
} else if (magicString.Equals (CpioConstants.MAGIC_NEW_CRC)) {
this.currentEntry = ReadNewEntry (true);
} else if (magicString.Equals (CpioConstants.MAGIC_OLD_ASCII)) {
this.currentEntry = ReadOldAsciiEntry ();
} else {
string tmpString = "";
foreach (byte b in tmp) {
tmpString += b.ToString ("X") + ",";
}
throw new IOException ("Unknown magic [" + magicString + "][" + tmpString + "]. Occured at byte: " + Position + "/0x" + Position.ToString ("X"));
}
}
this.entryBytesRead = 0;
if (this.currentEntry.Name.Equals (CpioConstants.CPIO_TRAILER)) {
int contador = 0;
while (this.inputStream.ReadByte() >= 0){
contador++;
}
return null;
}
this.dataStream = new SizeLimiterStream (this.inputStream, this.currentEntry.Size);
if (this.currentEntry.Format == CpioConstants.FORMAT_NEW_CRC) {
this.dataStream = new ChecksumStream (dataStream, new CpioChecksum ());
}
return this.currentEntry;
}
private CpioArchiveEntry ReadNewEntry(bool hasCrc)
{
CpioArchiveEntry ret;
if (hasCrc) {
ret = new CpioArchiveEntry (CpioConstants.FORMAT_NEW_CRC);
} else {
ret = new CpioArchiveEntry (CpioConstants.FORMAT_NEW);
}
ret.Inode = ReadAsciiLong (8, 16);
long mode = ReadAsciiLong (8, 16);
if (mode != 0) {
// mode is initialised to 0
ret.Mode = mode;
}
ret.UID = ReadAsciiLong(8, 16);
ret.GID = ReadAsciiLong(8, 16);
ret.NumberOfLinks = ReadAsciiLong(8, 16);
ret.Time = ReadAsciiLong(8, 16);
ret.Size = ReadAsciiLong(8, 16);
ret.DeviceMaj = ReadAsciiLong(8, 16);
ret.DeviceMin = ReadAsciiLong(8, 16);
ret.RemoteDeviceMaj = ReadAsciiLong(8, 16);
ret.RemoteDeviceMin = ReadAsciiLong(8, 16);
long namesize = ReadAsciiLong(8, 16);
ret.Chksum= ReadAsciiLong(8, 16);
String name = ReadCString((int) namesize);
ret.Name = name;
if (mode == 0 && !name.Equals(CpioConstants.CPIO_TRAILER)){
throw new IOException("Mode 0 only allowed in the trailer. Found entry name: "+name + " Occured at byte: " + Position);
}
Skip(ret.HeaderPadCount);
return ret;
}
private void WriteOldAsciiEntry( CpioArchiveEntry entry)
{
WriteAsciiLong(entry.Device, 6, 8);
WriteAsciiLong(entry.Inode, 6, 8);
WriteAsciiLong(entry.Mode, 6, 8);
WriteAsciiLong(entry.UID, 6, 8);
WriteAsciiLong(entry.GID, 6, 8);
WriteAsciiLong(entry.NumberOfLinks, 6, 8);
WriteAsciiLong(entry.RemoteDevice, 6, 8);
WriteAsciiLong(entry.Time, 11, 8);
WriteAsciiLong(entry.Name.Length + 1, 6, 8);
WriteAsciiLong(entry.Size, 11, 8);
WriteCString(entry.Name);
}
private void WriteOldBinaryEntry(CpioArchiveEntry entry, bool swapHalfWord)
{
WriteBinaryLong(entry.Device, 2, swapHalfWord);
WriteBinaryLong(entry.Inode, 2, swapHalfWord);
WriteBinaryLong(entry.Mode, 2, swapHalfWord);
WriteBinaryLong(entry.UID, 2, swapHalfWord);
WriteBinaryLong(entry.GID, 2, swapHalfWord);
WriteBinaryLong(entry.NumberOfLinks, 2, swapHalfWord);
WriteBinaryLong(entry.RemoteDevice, 2, swapHalfWord);
WriteBinaryLong(entry.Time, 4, swapHalfWord);
WriteBinaryLong(entry.Name.Length + 1, 2, swapHalfWord);
WriteBinaryLong(entry.Size, 4, swapHalfWord);
WriteCString(entry.Name);
Pad(entry.HeaderPadCount);
}
private void WriteNewEntry(CpioArchiveEntry entry)
{
WriteAsciiLong(entry.Inode, 8, 16);
WriteAsciiLong(entry.Mode, 8, 16);
WriteAsciiLong(entry.UID, 8, 16);
WriteAsciiLong(entry.GID, 8, 16);
WriteAsciiLong(entry.NumberOfLinks, 8, 16);
WriteAsciiLong(entry.Time, 8, 16);
WriteAsciiLong(entry.Size, 8, 16);
WriteAsciiLong(entry.DeviceMaj, 8, 16);
WriteAsciiLong(entry.DeviceMin, 8, 16);
WriteAsciiLong(entry.RemoteDeviceMaj, 8, 16);
WriteAsciiLong(entry.RemoteDeviceMin, 8, 16);
WriteAsciiLong(entry.Name.Length + 1, 8, 16);
WriteAsciiLong(entry.Chksum, 8, 16);
WriteCString(entry.Name);
Pad(entry.HeaderPadCount);
}
private void WriteHeader(CpioArchiveEntry e)
{
switch (e.Format) {
case CpioConstants.FORMAT_NEW:
this.Write (UtArrays.ToAsciiBytes (CpioConstants.MAGIC_NEW));
WriteNewEntry (e);
break;
case CpioConstants.FORMAT_NEW_CRC:
this.Write (UtArrays.ToAsciiBytes (CpioConstants.MAGIC_NEW_CRC));
WriteNewEntry (e);
break;
case CpioConstants.FORMAT_OLD_ASCII:
this.Write (UtArrays.ToAsciiBytes (CpioConstants.MAGIC_OLD_ASCII));
WriteOldAsciiEntry (e);
break;
case CpioConstants.FORMAT_OLD_BINARY:
bool swapHalfWord = true;
WriteBinaryLong (CpioConstants.MAGIC_OLD_BINARY, 2, swapHalfWord);
WriteOldBinaryEntry (e, swapHalfWord);
break;
}
}
public override void PutArchiveEntry(ArchiveEntry entry)
{
if (finished) {
throw new IOException ("Stream has already been finished");
}
CpioArchiveEntry e = (CpioArchiveEntry)entry;
EnsureOpen ();
if (this.entry != null) {
CloseArchiveEntry ();
// close previous entry
}
if (e.Time == -1) {
e.Time = DateUtils.CurrentUnixTimeMillis;
}
short format = e.Format;
if (format != this.entryFormat) {
throw new IOException ("Header format: " + format + " does not match existing format: " + this.entryFormat);
}
// TODO Comprobar duplicados
/*
if (this.names.put(e.getName(), e) != null) {
throw new IOException("duplicate entry: " + e.getName());
}
*/
WriteHeader (e);
this.entry = e;
this.written = 0;
}
public override void Finish()
{
EnsureOpen();
if (finished) {
throw new IOException("This archive has already been finished");
}
if (this.entry != null) {
throw new IOException("This archive contains unclosed entries.");
}
this.entry = new CpioArchiveEntry(this.entryFormat);
this.entry.Name=CpioConstants.CPIO_TRAILER;
this.entry.NumberOfLinks = 1;
WriteHeader(this.entry);
CloseArchiveEntry();
finished = true;
}
public override void CloseArchiveEntry()
{
// TODO
if (finished) {
throw new IOException ("Stream has already been finished");
}
EnsureOpen ();
if (entry == null) {
throw new IOException ("Trying to close non-existent entry");
}
if (this.entry.Size != this.written) {
throw new IOException ("invalid entry size (expected "
+ this.entry.Size + " but got " + this.written
+ " bytes)");
}
Pad (this.entry.DataPadCount);
/*
* TODO
if (this.entry.Format == CpioConstants.FORMAT_NEW_CRC) {
if (this.crc != this.entry.Chksum) {
throw new IOException("CRC Error");
}
}
*/
this.entry = null;
//this.crc = 0;
this.written = 0;
}
