001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common
008: * Development and Distribution License("CDDL") (collectively, the
009: * "License"). You may not use this file except in compliance with the
010: * License. You can obtain a copy of the License at
011: * http://www.netbeans.org/cddl-gplv2.html
012: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
013: * specific language governing permissions and limitations under the
014: * License. When distributing the software, include this License Header
015: * Notice in each file and include the License file at
016: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
017: * particular file as subject to the "Classpath" exception as provided
018: * by Sun in the GPL Version 2 section of the License file that
019: * accompanied this code. If applicable, add the following below the
020: * License Header, with the fields enclosed by brackets [] replaced by
021: * your own identifying information:
022: * "Portions Copyrighted [year] [name of copyright owner]"
023: *
024: * Contributor(s):
025: *
026: * The Original Software is NetBeans. The Initial Developer of the Original
027: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun
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030: * If you wish your version of this file to be governed by only the CDDL
031: * or only the GPL Version 2, indicate your decision by adding
032: * "[Contributor] elects to include this software in this distribution
033: * under the [CDDL or GPL Version 2] license." If you do not indicate a
034: * single choice of license, a recipient has the option to distribute
035: * your version of this file under either the CDDL, the GPL Version 2 or
036: * to extend the choice of license to its licensees as provided above.
037: * However, if you add GPL Version 2 code and therefore, elected the GPL
038: * Version 2 license, then the option applies only if the new code is
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040: */
041:
042: package org.netbeans.modules.cnd.modelimpl.parser.apt;
043:
044: import antlr.Token;
045: import org.netbeans.modules.cnd.apt.structure.APT;
046: import org.netbeans.modules.cnd.apt.structure.APTFile;
047: import org.netbeans.modules.cnd.apt.structure.APTIfndef;
048: import org.netbeans.modules.cnd.apt.support.APTPreprocHandler;
049: import org.netbeans.modules.cnd.apt.support.APTWalker;
050:
051: /**
052: *
053: * @author Alexander Simon
054: */
055: public class GuardBlockWalker extends APTWalker {
056:
057: private APTIfndef guardCheck;
058: private Boolean hasGuard = null;
059:
060: /** Creates a new instance of GuardBlockWalker */
061: public GuardBlockWalker(APTFile apt,
062: APTPreprocHandler preprocHandler) {
063: super (apt, preprocHandler == null ? null : preprocHandler
064: .getMacroMap());
065: }
066:
067: public Token getGuard() {
068: if (hasGuard == Boolean.TRUE && guardCheck != null) {
069: return guardCheck.getMacroName();
070: }
071: return null;
072: }
073:
074: protected void onDefine(APT apt) {
075: hasGuard = Boolean.FALSE;
076: }
077:
078: protected void onUndef(APT apt) {
079: hasGuard = Boolean.FALSE;
080: }
081:
082: protected boolean onIf(APT apt) {
083: hasGuard = Boolean.FALSE;
084: return false;
085: }
086:
087: protected boolean onIfdef(APT apt) {
088: hasGuard = Boolean.FALSE;
089: return false;
090: }
091:
092: protected boolean onIfndef(APT apt) {
093: guardCheck = (APTIfndef) apt;
094: hasGuard = (hasGuard == null) ? Boolean.TRUE : Boolean.FALSE;
095: return false;
096: }
097:
098: protected boolean onElif(APT apt, boolean wasInPrevBranch) {
099: hasGuard = Boolean.FALSE;
100: return false;
101: }
102:
103: protected boolean onElse(APT apt, boolean wasInPrevBranch) {
104: hasGuard = Boolean.FALSE;
105: return false;
106: }
107:
108: protected void onEndif(APT apt, boolean wasInBranch) {
109: hasGuard = (hasGuard == Boolean.TRUE) ? Boolean.TRUE
110: : Boolean.FALSE;
111: }
112:
113: protected void onInclude(APT apt) {
114: hasGuard = Boolean.FALSE;
115: }
116:
117: protected void onIncludeNext(APT apt) {
118: hasGuard = Boolean.FALSE;
119: }
120:
121: protected void onOtherNode(APT apt) {
122: hasGuard = Boolean.FALSE;
123: }
124:
125: public void clearGuard() {
126: hasGuard = Boolean.FALSE;
127: }
128:
129: }
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