projects / deliverable / tracecompass.git / blame
| Commit | Line | Data |
|---|---|---|
| a4fa4e36 MK |
1 | /******************************************************************************* |
| 2 | * Copyright (c) 2014 Ericsson | |
| 3 | * | |
| 4 | * All rights reserved. This program and the accompanying materials are made | |
| 5 | * available under the terms of the Eclipse Public License v1.0 which | |
| 6 | * accompanies this distribution, and is available at | |
| 7 | * http://www.eclipse.org/legal/epl-v10.html | |
| 8 | * | |
| 9 | * Contributors: Matthew Khouzam - Initial API and implementation | |
| 10 | *******************************************************************************/ | |
| 11 | ||
| 12 | package org.eclipse.linuxtools.ctf.core.event.types; | |
| 13 | ||
| 14 | import org.eclipse.jdt.annotation.NonNull; | |
| 15 | import org.eclipse.linuxtools.ctf.core.event.io.BitBuffer; | |
| 16 | import org.eclipse.linuxtools.ctf.core.event.scope.IDefinitionScope; | |
| 17 | import org.eclipse.linuxtools.ctf.core.event.scope.LexicalScope; | |
| 18 | import org.eclipse.linuxtools.ctf.core.trace.CTFReaderException; | |
| 19 | ||
| 20 | /** | |
| 21 | * Declaration base, it helps for basic functionality that is often called, so | |
| 22 | * performance is often a high priority in this class | |
| 23 | * | |
| 24 | * @author Matthew Khouzam | |
| 25 | * @since 3.0 | |
| 26 | */ | |
| 27 | public abstract class Declaration implements IDeclaration { | |
| 28 | ||
| 29 | @Override | |
| 30 | public LexicalScope getPath(IDefinitionScope definitionScope, @NonNull String fieldName) { | |
| 31 | if (definitionScope != null) { | |
| 32 | final LexicalScope parentPath = definitionScope.getScopePath(); | |
| 33 | if (parentPath != null) { | |
| 34 | LexicalScope myScope = parentPath.getChild(fieldName); | |
| 35 | if (myScope == null) { | |
| 36 | myScope = new LexicalScope(parentPath, fieldName); | |
| 37 | } | |
| 38 | return myScope; | |
| 39 | } | |
| 40 | } | |
| 41 | LexicalScope child = LexicalScope.ROOT.getChild(fieldName); | |
| 42 | if (child != null) { | |
| 43 | return child; | |
| 44 | } | |
| 45 | return new LexicalScope(LexicalScope.ROOT, fieldName); | |
| 46 | } | |
| 47 | ||
| 48 | /** | |
| 49 | * Offset the buffer position wrt the current alignment. | |
| 50 | * | |
| 51 | * @param input | |
| 52 | * The bitbuffer that is being read | |
| 53 | * @throws CTFReaderException | |
| 54 | * Happens when there is an out of bounds exception | |
| 55 | * @since 3.0 | |
| 56 | */ | |
| 57 | protected final void alignRead(BitBuffer input) throws CTFReaderException { | |
| 58 | long mask = getAlignment() - 1; | |
| 59 | /* | |
| 60 | * The alignment is a power of 2 | |
| 61 | */ | |
| 62 | long pos = input.position(); | |
| 63 | if ((pos & mask) == 0) { | |
| 64 | return; | |
| 65 | } | |
| 66 | pos = (pos + mask) & ~mask; | |
| 67 | input.position(pos); | |
| 68 | } | |
| 69 | } |