jellyfin/Emby.Common.Implementations/IO/SharpCifs/Smb/SmbRandomAccessFile.cs

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2017-04-02 00:36:06 +00:00
// This code is derived from jcifs smb client library <jcifs at samba dot org>
// Ported by J. Arturo <webmaster at komodosoft dot net>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
using System;
using System.IO;
using System.Text;
using SharpCifs.Util;
using SharpCifs.Util.Sharpen;
namespace SharpCifs.Smb
{
public class SmbRandomAccessFile //: DataOutput, DataInput
{
private const int WriteOptions = unchecked(0x0842);
private SmbFile _file;
private long _fp;
private int _openFlags;
private int _access;
private int _readSize;
private int _writeSize;
private int _ch;
private int _options;
private byte[] _tmp = new byte[8];
private SmbComWriteAndXResponse _writeAndxResp;
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
/// <exception cref="System.UriFormatException"></exception>
/// <exception cref="UnknownHostException"></exception>
public SmbRandomAccessFile(string url, string mode, int shareAccess) : this(new SmbFile
(url, string.Empty, null, shareAccess), mode)
{
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
/// <exception cref="System.UriFormatException"></exception>
/// <exception cref="UnknownHostException"></exception>
public SmbRandomAccessFile(SmbFile file, string mode)
{
this._file = file;
if (mode.Equals("r"))
{
_openFlags = SmbFile.OCreat | SmbFile.ORdonly;
}
else
{
if (mode.Equals("rw"))
{
_openFlags = SmbFile.OCreat | SmbFile.ORdwr | SmbFile.OAppend;
_writeAndxResp = new SmbComWriteAndXResponse();
_options = WriteOptions;
_access = SmbConstants.FileReadData | SmbConstants.FileWriteData;
}
else
{
throw new ArgumentException("Invalid mode");
}
}
file.Open(_openFlags, _access, SmbFile.AttrNormal, _options);
_readSize = file.Tree.Session.transport.RcvBufSize - 70;
_writeSize = file.Tree.Session.transport.SndBufSize - 70;
_fp = 0L;
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public virtual int Read()
{
if (Read(_tmp, 0, 1) == -1)
{
return -1;
}
return _tmp[0] & unchecked(0xFF);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public virtual int Read(byte[] b)
{
return Read(b, 0, b.Length);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public virtual int Read(byte[] b, int off, int len)
{
if (len <= 0)
{
return 0;
}
long start = _fp;
// ensure file is open
if (_file.IsOpen() == false)
{
_file.Open(_openFlags, 0, SmbFile.AttrNormal, _options);
}
int r;
int n;
SmbComReadAndXResponse response = new SmbComReadAndXResponse(b, off);
do
{
r = len > _readSize ? _readSize : len;
_file.Send(new SmbComReadAndX(_file.Fid, _fp, r, null), response);
if ((n = response.DataLength) <= 0)
{
return (int)((_fp - start) > 0L ? _fp - start : -1);
}
_fp += n;
len -= n;
response.Off += n;
}
while (len > 0 && n == r);
return (int)(_fp - start);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public void ReadFully(byte[] b)
{
ReadFully(b, 0, b.Length);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public void ReadFully(byte[] b, int off, int len)
{
int n = 0;
int count;
do
{
count = Read(b, off + n, len - n);
if (count < 0)
{
throw new SmbException("EOF");
}
n += count;
_fp += count;
}
while (n < len);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public virtual int SkipBytes(int n)
{
if (n > 0)
{
_fp += n;
return n;
}
return 0;
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public virtual void Write(int b)
{
_tmp[0] = unchecked((byte)b);
Write(_tmp, 0, 1);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public virtual void Write(byte[] b)
{
Write(b, 0, b.Length);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public virtual void Write(byte[] b, int off, int len)
{
if (len <= 0)
{
return;
}
// ensure file is open
if (_file.IsOpen() == false)
{
_file.Open(_openFlags, 0, SmbFile.AttrNormal, _options);
}
int w;
do
{
w = len > _writeSize ? _writeSize : len;
_file.Send(new SmbComWriteAndX(_file.Fid, _fp, len - w, b, off, w, null), _writeAndxResp
);
_fp += _writeAndxResp.Count;
len -= (int)_writeAndxResp.Count;
off += (int)_writeAndxResp.Count;
}
while (len > 0);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public virtual long GetFilePointer()
{
return _fp;
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public virtual void Seek(long pos)
{
_fp = pos;
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public virtual long Length()
{
return _file.Length();
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public virtual void SetLength(long newLength)
{
// ensure file is open
if (_file.IsOpen() == false)
{
_file.Open(_openFlags, 0, SmbFile.AttrNormal, _options);
}
SmbComWriteResponse rsp = new SmbComWriteResponse();
_file.Send(new SmbComWrite(_file.Fid, (int)(newLength & unchecked(0xFFFFFFFFL)), 0, _tmp, 0, 0), rsp);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public virtual void Close()
{
_file.Close();
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public bool ReadBoolean()
{
if ((Read(_tmp, 0, 1)) < 0)
{
throw new SmbException("EOF");
}
return _tmp[0] != unchecked(unchecked(0x00));
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public byte ReadByte()
{
if ((Read(_tmp, 0, 1)) < 0)
{
throw new SmbException("EOF");
}
return _tmp[0];
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public int ReadUnsignedByte()
{
if ((Read(_tmp, 0, 1)) < 0)
{
throw new SmbException("EOF");
}
return _tmp[0] & unchecked(0xFF);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public short ReadShort()
{
if ((Read(_tmp, 0, 2)) < 0)
{
throw new SmbException("EOF");
}
return Encdec.Dec_uint16be(_tmp, 0);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public int ReadUnsignedShort()
{
if ((Read(_tmp, 0, 2)) < 0)
{
throw new SmbException("EOF");
}
return Encdec.Dec_uint16be(_tmp, 0) & unchecked(0xFFFF);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public char ReadChar()
{
if ((Read(_tmp, 0, 2)) < 0)
{
throw new SmbException("EOF");
}
return (char)Encdec.Dec_uint16be(_tmp, 0);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public int ReadInt()
{
if ((Read(_tmp, 0, 4)) < 0)
{
throw new SmbException("EOF");
}
return Encdec.Dec_uint32be(_tmp, 0);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public long ReadLong()
{
if ((Read(_tmp, 0, 8)) < 0)
{
throw new SmbException("EOF");
}
return Encdec.Dec_uint64be(_tmp, 0);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public float ReadFloat()
{
if ((Read(_tmp, 0, 4)) < 0)
{
throw new SmbException("EOF");
}
return Encdec.Dec_floatbe(_tmp, 0);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public double ReadDouble()
{
if ((Read(_tmp, 0, 8)) < 0)
{
throw new SmbException("EOF");
}
return Encdec.Dec_doublebe(_tmp, 0);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public string ReadLine()
{
StringBuilder input = new StringBuilder();
int c = -1;
bool eol = false;
while (!eol)
{
switch (c = Read())
{
case -1:
case '\n':
{
eol = true;
break;
}
case '\r':
{
eol = true;
long cur = _fp;
if (Read() != '\n')
{
_fp = cur;
}
break;
}
default:
{
input.Append((char)c);
break;
}
}
}
if ((c == -1) && (input.Length == 0))
{
return null;
}
return input.ToString();
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public string ReadUtf()
{
int size = ReadUnsignedShort();
byte[] b = new byte[size];
Read(b, 0, size);
try
{
return Encdec.Dec_utf8(b, 0, size);
}
catch (IOException ioe)
{
throw new SmbException(string.Empty, ioe);
}
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public void WriteBoolean(bool v)
{
_tmp[0] = unchecked((byte)(v ? 1 : 0));
Write(_tmp, 0, 1);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public void WriteByte(int v)
{
_tmp[0] = unchecked((byte)v);
Write(_tmp, 0, 1);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public void WriteShort(int v)
{
Encdec.Enc_uint16be((short)v, _tmp, 0);
Write(_tmp, 0, 2);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public void WriteChar(int v)
{
Encdec.Enc_uint16be((short)v, _tmp, 0);
Write(_tmp, 0, 2);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public void WriteInt(int v)
{
Encdec.Enc_uint32be(v, _tmp, 0);
Write(_tmp, 0, 4);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public void WriteLong(long v)
{
Encdec.Enc_uint64be(v, _tmp, 0);
Write(_tmp, 0, 8);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public void WriteFloat(float v)
{
Encdec.Enc_floatbe(v, _tmp, 0);
Write(_tmp, 0, 4);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public void WriteDouble(double v)
{
Encdec.Enc_doublebe(v, _tmp, 0);
Write(_tmp, 0, 8);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public void WriteBytes(string s)
{
byte[] b = Runtime.GetBytesForString(s);
Write(b, 0, b.Length);
}
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
/* public void WriteChars(string s)
{
int clen = s.Length;
int blen = 2 * clen;
byte[] b = new byte[blen];
char[] c = new char[clen];
Sharpen.Runtime.GetCharsForString(s, 0, clen, c, 0);
for (int i = 0, j = 0; i < clen; i++)
{
b[j++] = unchecked((byte)((char)(((uchar)c[i]) >> 8)));
b[j++] = unchecked((byte)((char)(((uchar)c[i]) >> 0)));
}
Write(b, 0, blen);
}*/
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
public void WriteUtf(string str)
{
int len = str.Length;
int ch;
int size = 0;
byte[] dst;
for (int i = 0; i < len; i++)
{
ch = str[i];
size += ch > unchecked(0x07F) ? (ch > unchecked(0x7FF) ? 3 : 2) : 1;
}
dst = new byte[size];
WriteShort(size);
try
{
Encdec.Enc_utf8(str, dst, 0, size);
}
catch (IOException ioe)
{
throw new SmbException(string.Empty, ioe);
}
Write(dst, 0, size);
}
}
}