/// <summary>
/// Construct a <see cref="Row"/> object from input carried in via the given input stream.
/// </summary>
/// <param name="@is">the input stream</param>
/// <exception cref="IOException">if an I/O error occurs</exception>
public Row(IDataInput @is)
{
for (int i = @is.ReadInt(); i > 0; i--)
{
char ch = @is.ReadChar();
Cell c = new Cell();
c.cmd = @is.ReadInt();
c.cnt = @is.ReadInt();
c.@ref = @is.ReadInt();
c.skip = @is.ReadInt();
cells[ch] = c;
}
}
/// <summary>
/// Set the command in the <see cref="Cell"/> of the given <see cref="char"/> to the given <see cref="int"/>.
/// </summary>
/// <param name="way">the <see cref="char"/> defining the <see cref="Cell"/></param>
/// <param name="cmd">the new command</param>
public void SetCmd(char way, int cmd)
{
Cell c = At(way);
if (c == null)
{
c = new Cell();
c.cmd = cmd;
cells[way] = c;
}
else
{
c.cmd = cmd;
}
c.cnt = (cmd >= 0) ? 1 : 0;
}
/// <summary>
/// Set the reference to the next row in the <see cref="Cell"/> of the given <see cref="char"/> to the
/// given <see cref="int"/>.
/// </summary>
/// <param name="way">the <see cref="char"/> defining the <see cref="Cell"/></param>
/// <param name="ref">The new ref value</param>
public void SetRef(char way, int @ref)
{
Cell c = At(way);
if (c == null)
{
c = new Cell();
c.@ref = @ref;
cells[way] = c;
}
else
{
c.@ref = @ref;
}
}
/// <summary>
/// Merge the given <see cref="Cell"/>s and return the resulting <see cref="Cell"/>.
/// </summary>
/// <param name="m">the master <see cref="Cell"/></param>
/// <param name="e">the existing <see cref="Cell"/></param>
/// <returns>the resulting <see cref="Cell"/>, or <c>null</c> if the operation cannot be realized</returns>
public virtual Cell Merge(Cell m, Cell e)
{
Cell n = new Cell();
if (m.skip != e.skip)
{
return null;
}
if (m.cmd >= 0)
{
if (e.cmd >= 0)
{
if (m.cmd == e.cmd)
{
n.cmd = m.cmd;
}
else
{
return null;
}
}
else
{
n.cmd = m.cmd;
}
}
else
{
n.cmd = e.cmd;
}
if (m.@ref >= 0)
{
if (e.@ref >= 0)
{
if (m.@ref == e.@ref)
{
if (m.skip == e.skip)
{
n.@ref = m.@ref;
}
else
{
return null;
}
}
else
{
return null;
}
}
else
{
n.@ref = m.@ref;
}
}
else
{
n.@ref = e.@ref;
}
n.cnt = m.cnt + e.cnt;
n.skip = m.skip;
return n;
}
