/*
* Copyright (C) 2012, 2016 higherfrequencytrading.com
* Copyright (C) 2016 Roman Leventov
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package net.openhft.lang.values;
import net.openhft.chronicle.bytes.Byteable;
import net.openhft.chronicle.bytes.BytesStore;
import net.openhft.chronicle.bytes.NativeBytesStore;
import net.openhft.chronicle.values.Copyable;
/**
* Created by peter.lawrey on 23/04/2015.
*/
public class DoubleArray implements Byteable, Copyable<DoubleArray> {
static boolean HACK = true;
private static int CAPACITY = 0; // assume a 32-bit size.
private static int LENGTH = CAPACITY + 4; // assume a 32-bit size.
private static int BASE = LENGTH + 4;
private BytesStore bs;
private long offset;
// creates an empty DoubleArray
public DoubleArray() {
}
public DoubleArray(int capacity) {
bs = NativeBytesStore.nativeStoreWithFixedCapacity(BASE + capacity * 8L);
bs.writeInt(CAPACITY, capacity);
offset = 0;
}
@Override
public void bytesStore(BytesStore bytes, long offset, long maxSize) {
this.bs = bytes;
this.offset = offset;
}
@Override
public BytesStore bytesStore() {
return bs;
}
@Override
public long offset() {
return offset;
}
@Override
public long maxSize() {
return BASE + length() * 8;
}
public int length() {
return HACK && bs == null ? 6 * 8 : bs.readInt(LENGTH + offset);
}
public int capacity() {
return bs.readInt(CAPACITY + offset);
}
public double getDataAt(int index) {
if (index < 0 || index >= length()) throw new ArrayIndexOutOfBoundsException();
return bs.readDouble(BASE + offset + index * 8L);
}
public void setDataAt(int index, double d) {
if (index < 0 || index >= capacity()) throw new ArrayIndexOutOfBoundsException();
if (length() <= index)
setLength(index + 1);
bs.writeDouble(BASE + offset + index * 8L, d);
}
public void setLength(int length) {
if (length < 0 || length >= capacity()) throw new IllegalArgumentException();
bs.writeInt(LENGTH + offset, length);
}
public void addData(double d) {
int index = length();
if (index >= capacity()) throw new IllegalStateException();
bs.writeInt(LENGTH + offset, index + 1);
bs.writeDouble(BASE + offset + index * 8L, d);
}
public void setData(double[] doubles) {
if (doubles.length > capacity()) throw new IllegalArgumentException();
bs.writeInt(LENGTH + offset, doubles.length);
for (int index = 0; index < doubles.length; index++)
bs.writeDouble(BASE + offset + index * 8L, doubles[index]);
}
public int getDataUsing(double[] doubles) {
int length = Math.min(length(), doubles.length);
for (int index = 0; index < length; index++)
doubles[index] = bs.readDouble(BASE + offset + index * 8L);
return length;
}
@Override
public void copyFrom(DoubleArray doubleArray) {
int length = length();
// set first so we check the length will fit.
doubleArray.setLength(length);
for (int i = 0; i < length; i++)
doubleArray.setDataAt(i, getDataAt(i));
}
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("[ ");
String sep = "";
for (int i = 0, len = length(); i < len; i++) {
sb.append(sep).append(getDataAt(i));
sep = ", ";
}
return sb.append(" ]").toString();
}
}