public long Seek(long offset, ProcessSeekOrigin loc)
{
SeekOverunEventArgs args = null;
var continueBaseSeek = true;
switch (loc)
{
case ProcessSeekOrigin.BeginningOfProcessMemory:
args = new SeekOverunEventArgs(offset, loc);
OnSeekOverun(this, args);
continueBaseSeek = args.ContinueBaseSeek;
break;
case ProcessSeekOrigin.Begin:
if (offset > this.BufferLength || offset < 0)
{
args = new SeekOverunEventArgs(offset, loc);
OnSeekOverun(this, args);
continueBaseSeek = args.ContinueBaseSeek;
}
break;
case ProcessSeekOrigin.End:
var position = this.BufferLength + offset;
if (position > this.BufferLength || position < 0)
{
args = new SeekOverunEventArgs(offset, loc);
OnSeekOverun(this, args);
continueBaseSeek = args.ContinueBaseSeek;
}
break;
case ProcessSeekOrigin.Current:
if (offset > this.BufferLength - this.Position || offset < 0)
{
args = new SeekOverunEventArgs(offset, loc);
OnSeekOverun(this, args);
continueBaseSeek = args.ContinueBaseSeek;
}
break;
default:
e.Throw <ArgumentException>("Invalid seek origin {0}", loc);
break;
}
if (continueBaseSeek)
{
if (args != null)
{
if (args.OutOfRegionPosition)
{
switch (args.BaseSeekOrigin)
{
case SeekOrigin.Begin:
outOfRegionPosition = args.BaseOffset;
break;
case SeekOrigin.Current:
outOfRegionPosition = base.Position + args.BaseOffset;
break;
case SeekOrigin.End:
outOfRegionPosition = base.Length + args.BaseOffset;
break;
}
return(outOfRegionPosition);
}
else
{
outOfRegionPosition = -1;
try
{
return(base.Seek(args.BaseOffset, args.BaseSeekOrigin));
}
catch (Exception ex)
{
throw;
}
}
}
else
{
try
{
return(base.Seek(offset, (SeekOrigin)loc));
}
catch (Exception ex)
{
throw;
}
}
}
else
{
return(args.Position);
}
}
public SeekOverunEventArgs(long offset, ProcessSeekOrigin loc)
{
this.Offset = offset;
this.Location = loc;
}
