| /******************************************************************************* |
| * Copyright (c) 2015, 2016 Google, Inc and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Stefan Xenos (Google) - Initial implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.core.nd.field; |
| |
| import org.eclipse.jdt.internal.core.nd.Nd; |
| import org.eclipse.jdt.internal.core.nd.db.ModificationLog; |
| import org.eclipse.jdt.internal.core.nd.db.ModificationLog.Tag; |
| import org.eclipse.jdt.internal.core.nd.db.Database; |
| |
| /** |
| * Declares a Nd field of type char. Can be used in place of {@link Field}<{@link Character}> in order to |
| * avoid extra GC overhead. |
| */ |
| public class FieldChar extends BaseField { |
| private final Tag tag; |
| |
| public FieldChar(String structName, int fieldNumber) { |
| setFieldName("field " + fieldNumber + ", a " + getClass().getSimpleName() + " in struct " + structName); //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$ |
| this.tag = ModificationLog.createTag("Writing " + getFieldName()); //$NON-NLS-1$ |
| } |
| |
| public char get(Nd nd, long address) { |
| Database db = nd.getDB(); |
| return db.getChar(address + this.offset); |
| } |
| |
| public void put(Nd nd, long address, char newValue) { |
| Database db = nd.getDB(); |
| db.getLog().start(this.tag); |
| try { |
| nd.getDB().putChar(address + this.offset, newValue); |
| } finally { |
| db.getLog().end(this.tag); |
| } |
| } |
| |
| @Override |
| public int getRecordSize() { |
| return Database.CHAR_SIZE; |
| } |
| } |