/// <summary>
/// Gets field ID if possible.
/// </summary>
/// <param name="fieldName">Field name.</param>
/// <param name="fieldType">Field type.</param>
/// <param name="pathIdx">Path index, changes during jumps.</param>
/// <param name="actionIdx">Action index.</param>
/// <returns>Field ID or zero in case there are no matching path.</returns>
public int GetFieldId(string fieldName, byte fieldType, ref int pathIdx, int actionIdx)
{
Debug.Assert(fieldName != null);
Debug.Assert(pathIdx <= _paths.Length);
// Get path.
BinaryStructureEntry[] path = _paths[pathIdx];
if (actionIdx < path.Length)
{
// Get entry matching the action index.
BinaryStructureEntry entry = path[actionIdx];
if (entry.IsExpected(fieldName, fieldType))
{
// Entry matches our expectations, return.
return(entry.Id);
}
if (entry.IsJumpTable)
{
// Entry is a pointer to a jump table.
Debug.Assert(entry.Id < _jumps.Length);
BinaryStructureJumpTable jmpTbl = _jumps[entry.Id];
if (jmpTbl == null)
{
return(0);
}
int pathIdx0 = jmpTbl.GetPathIndex(fieldName);
if (pathIdx0 < 0)
{
return(0);
}
Debug.Assert(pathIdx0 < _paths.Length);
entry = _paths[pathIdx0][actionIdx];
entry.ValidateType(fieldType);
pathIdx = pathIdx0;
return(entry.Id);
}
}
// Failed to find anything because this is a new field.
return(0);
}
