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package smetana.core;

import com.plantuml.api.cheerpj.WasmLog;

final public class CArrayOfStar extends UnsupportedC {

	private final Object[] data;
	private final int offset;

	@Override
	public String toString() {
		return "*Array offset=" + offset + " [" + data.length + "]" + data;
	}

	private CArrayOfStar(Object data[], int offset) {
		this.data = data;
		this.offset = offset;
	}

	public static  CArrayOfStar ALLOC(int size, ZType type) {
		final CArrayOfStar result = new CArrayOfStar(new Object[size], 0);
		return result;
	}

	public static  CArrayOfStar REALLOC(int size, CArrayOfStar old, ZType type) {
		if (old == null)
			return ALLOC(size, type);

		if (size <= old.data.length)
			return old;

		if (old.offset != 0)
			throw new IllegalStateException();

		WasmLog.log("Realloc* from " + old.data.length + " to " + size);

		final CArrayOfStar result = ALLOC(size, type);
		System.arraycopy(old.data, 0, result.data, 0, old.data.length);
		return result;
	}

	public int comparePointer_(CArrayOfStar other) {
		if (this.data != other.data)
			throw new IllegalArgumentException();

		return this.offset - other.offset;
	}

	public O get_(int i) {
		return (O) data[i + offset];
	}

	public void set_(int i, O value) {
		data[i + offset] = value;
	}

	public CArrayOfStar plus_(int delta) {
		return new CArrayOfStar(data, offset + delta);
	}

	public void _swap(int i, int j) {
		if (offset != 0)
			throw new IllegalStateException();

		final Object tmp = data[i];
		data[i] = data[j];
		data[j] = tmp;
	}

}