/// <summary>
/// <inheritDoc/>
/// Note that the position will be adjusted to read from the corrected location in the underlying source
/// </summary>
/// <exception cref="System.IO.IOException"/>
public virtual int Get(long position)
{
if (position >= length)
{
return(-1);
}
return(source.Get(offset + position));
}
/**
* Reads a single byte
* @return the byte, or -1 if EOF is reached
* @throws IOException
*/
virtual public int Read()
{
if (isBack)
{
isBack = false;
return(back & 0xff);
}
return(byteSource.Get(byteSourcePosition++));
}
/// <summary><inheritDoc/></summary>
public override int Read(byte[] b, int off, int len)
{
int count = source.Get(position, b, off, len);
if (count == -1)
{
return(0);
}
position += count;
return(count);
}
/// <summary><inheritDoc/></summary>
/// <exception cref="System.IO.IOException"/>
public virtual int Get(long position)
{
if (position < getBufferStart || position > getBufferEnd)
{
int count = source.Get(position, getBuffer, 0, getBuffer.Length);
if (count == -1)
{
return(-1);
}
getBufferStart = position;
getBufferEnd = position + count - 1;
}
int bufPos = (int)(position - getBufferStart);
return(0xff & getBuffer[bufPos]);
}
public static void CopyBytes(IRandomAccessSource source, long start, long length, Stream outs) {
if (length <= 0)
return;
long idx = start;
byte[] buf = new byte[8192];
while (length > 0) {
long n = source.Get(idx, buf,0, (int)Math.Min((long)buf.Length, length));
if (n <= 0)
throw new EndOfStreamException();
outs.Write(buf, 0, (int)n);
idx += n;
length -= n;
}
}
public static void CopyBytes(IRandomAccessSource source, long start, long length, Stream outs)
{
if (length <= 0)
{
return;
}
long idx = start;
byte[] buf = new byte[8192];
while (length > 0)
{
long n = source.Get(idx, buf, 0, (int)Math.Min((long)buf.Length, length));
if (n <= 0)
{
throw new EndOfStreamException();
}
outs.Write(buf, 0, (int)n);
idx += n;
length -= n;
}
}
/// <summary><inheritDoc/></summary>
/// <exception cref="System.IO.IOException"/>
public virtual int Get(long position)
{
return(source.Get(position));
}