| 1 | /******************************************************************************* |
| 2 | * Copyright (c) 2015 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 | |
| 10 | package org.eclipse.tracecompass.internal.ctf.core.event.metadata.tsdl.integer; |
| 11 | |
| 12 | import static org.eclipse.tracecompass.internal.ctf.core.event.metadata.tsdl.TsdlUtils.concatenateUnaryStrings; |
| 13 | import static org.eclipse.tracecompass.internal.ctf.core.event.metadata.tsdl.TsdlUtils.isUnaryInteger; |
| 14 | import static org.eclipse.tracecompass.internal.ctf.core.event.metadata.tsdl.TsdlUtils.isUnaryString; |
| 15 | |
| 16 | import org.antlr.runtime.tree.CommonTree; |
| 17 | import org.eclipse.tracecompass.internal.ctf.core.event.metadata.ICommonTreeParser; |
| 18 | import org.eclipse.tracecompass.internal.ctf.core.event.metadata.MetadataStrings; |
| 19 | import org.eclipse.tracecompass.internal.ctf.core.event.metadata.ParseException; |
| 20 | import org.eclipse.tracecompass.internal.ctf.core.event.metadata.tsdl.UnaryIntegerParser; |
| 21 | |
| 22 | /** |
| 23 | * Singed status, whether an integer is capable of accepting negative values or |
| 24 | * not. |
| 25 | * |
| 26 | * @author Matthew Khouzam |
| 27 | */ |
| 28 | public final class SignedParser implements ICommonTreeParser { |
| 29 | /** |
| 30 | * Instance |
| 31 | */ |
| 32 | public static final SignedParser INSTANCE = new SignedParser(); |
| 33 | |
| 34 | private static final String INVALID_BOOLEAN_VALUE = "Invalid boolean value "; //$NON-NLS-1$ |
| 35 | |
| 36 | private SignedParser() { |
| 37 | } |
| 38 | |
| 39 | /** |
| 40 | * Parses whether the parent is signed or not. Typical syntax would be |
| 41 | * "signed = true;" or "signed = false;" |
| 42 | * |
| 43 | * @param tree |
| 44 | * the AST node containing "signed = boolean;" |
| 45 | * @param unused |
| 46 | * unused |
| 47 | * @return @link {@link Boolean#TRUE} if signed, {@link Boolean#FALSE} if |
| 48 | * unsigned |
| 49 | * @throws ParseException |
| 50 | * on a malformed tree |
| 51 | */ |
| 52 | @Override |
| 53 | public Boolean parse(CommonTree tree, ICommonTreeParserParameter unused) throws ParseException { |
| 54 | boolean ret = false; |
| 55 | CommonTree firstChild = (CommonTree) tree.getChild(0); |
| 56 | |
| 57 | if (isUnaryString(firstChild)) { |
| 58 | String strval = concatenateUnaryStrings(tree.getChildren()); |
| 59 | |
| 60 | if (strval.equals(MetadataStrings.TRUE) |
| 61 | || strval.equals(MetadataStrings.TRUE2)) { |
| 62 | ret = true; |
| 63 | } else if (strval.equals(MetadataStrings.FALSE) |
| 64 | || strval.equals(MetadataStrings.FALSE2)) { |
| 65 | ret = false; |
| 66 | } else { |
| 67 | throw new ParseException(INVALID_BOOLEAN_VALUE |
| 68 | + firstChild.getChild(0).getText()); |
| 69 | } |
| 70 | } else if (isUnaryInteger(firstChild)) { |
| 71 | /* Happens if the value is something like "1234.hello" */ |
| 72 | if (tree.getChildCount() > 1) { |
| 73 | throw new ParseException(INVALID_BOOLEAN_VALUE); |
| 74 | } |
| 75 | |
| 76 | long intval = UnaryIntegerParser.INSTANCE.parse(firstChild, null); |
| 77 | |
| 78 | if (intval == 1) { |
| 79 | ret = true; |
| 80 | } else if (intval == 0) { |
| 81 | ret = false; |
| 82 | } else { |
| 83 | throw new ParseException(INVALID_BOOLEAN_VALUE |
| 84 | + firstChild.getChild(0).getText()); |
| 85 | } |
| 86 | } else { |
| 87 | throw new ParseException(INVALID_BOOLEAN_VALUE); |
| 88 | } |
| 89 | return ret; |
| 90 | } |
| 91 | |
| 92 | } |