arrayset.java

A framework written in Java for implementing high-level and dynamic languages, compiling them into J

// Copyright (c) 2002  Per M.A. Bothner and Brainfood Inc.
// This is free software;  for terms and warranty disclaimer see ./COPYING.

package gnu.kawa.functions;
import gnu.lists.*;
import gnu.mapping.*;

public class ArraySet extends ProcedureN
{
  public static final ArraySet arraySet = new ArraySet();

  public static void arraySet(Array array, Sequence index, Object value)
  {
    int dims = index.size();
    int[] indexes = new int[dims];
    for (int i = 0;  i < dims;  i++)
      {
	indexes[i] = ((Number) index.get(i)).intValue();
      }
    array.set(indexes, value);
  }

  public Object apply3 (Object arg0, Object arg1, Object arg2)
    throws Throwable
  {
    if (arg1 instanceof Sequence)
      {
	arraySet((Array) arg0, (Sequence) arg1, arg2);
	return Values.empty;
      }
    else
      return super.apply3(arg0, arg1, arg2);
  }

  public Object applyN (Object[] args)
    throws Throwable
  {
    Array array = (Array) args[0];

    if (args.length == 3)
      {
	Object arg1 = args[1];
	if (arg1 instanceof Sequence)
	  {
	    arraySet(array, (Sequence) arg1, args[2]);
	    return Values.empty;
	  }
      }
    int dim = args.length-2;
    int[] indexes = new int[dim];
    for (int i = dim;  --i >= 0; )
      {
	indexes[i] = ((Number) args[i+1]).intValue();
      }
    array.set(indexes, args[dim+1]);
    return Values.empty;
  }
}