1 /* 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 package jdk.internal.clang; 25 26 import java.nio.ByteBuffer; 27 import java.util.ArrayList; 28 import java.util.List; 29 import java.util.stream.Stream; 30 31 public class Cursor extends StructType { 32 public static enum VisitResult { 33 Break, 34 Continue, 35 Recurse; 36 } 37 38 @FunctionalInterface 39 public static interface Visitor { 40 /** 41 * Callback function for visitChildren 42 * @param parent 43 * @param current 44 * @param data 45 * @return 0 - break, 1 - continue, 2 - recurse 46 */ 47 VisitResult visit(Cursor current, Cursor parent, Object data); 48 } 49 50 private static int visit(Visitor v, ByteBuffer c, ByteBuffer p, Object data) { 51 return v.visit(new Cursor(c), new Cursor(p), data).ordinal(); 52 } 53 54 Cursor(ByteBuffer buf) { 55 super(buf); 56 } 57 58 public native boolean isDeclaration(); 59 public native boolean isPreprocessing(); 60 public native boolean isInvalid(); 61 public native boolean isDefinition(); 62 public native boolean isAnonymousStruct(); 63 64 public boolean isAnonymousEnum() { 65 // libclang::clang_Cursor_isAnonymous only applies to struct, not enum 66 if (type().kind() == TypeKind.Enum) { 67 return spelling().isEmpty() && 68 type().spelling().startsWith("enum (anonymous"); 69 } 70 return false; 71 } 72 73 public boolean isAnonymous() { 74 return isAnonymousStruct() || isAnonymousEnum(); 75 } 76 77 public native String spelling(); 78 public native String USR(); 79 80 public native int kind1(); 81 82 public native int visitChildren(Visitor visitor, Object data); 83 84 public native boolean equalCursor(Cursor other); 85 86 public native Type type(); 87 public native Type getEnumDeclIntegerType(); 88 89 public native Cursor getDefinition(); 90 91 public native SourceLocation getSourceLocation(); 92 public native SourceRange getExtent(); 93 94 public native int numberOfArgs(); 95 public native Cursor getArgument(int idx); 96 97 // C long long, 64-bit 98 public native long getEnumConstantValue(); 99 // C unsigned long long, 64-bit 100 public native long getEnumConstantUnsignedValue(); 101 102 public native boolean isBitField(); 103 public native int getBitFieldWidth(); 104 105 native long getTranslationUnit0(); 106 public final TranslationUnit getTranslationUnit() { 107 return new TranslationUnit(getTranslationUnit0()); 108 } 109 110 public native String getMangling(); 111 112 public CursorKind kind() { 113 int v = kind1(); 114 // FIXME: assert(v == getData().getInt(0)); 115 return CursorKind.valueOf(v); 116 } 117 118 public boolean equals(Cursor other) { 119 return getData().equals(other.getData()); 120 } 121 122 public Stream<Cursor> children() { 123 ArrayList<Cursor> ar = new ArrayList<>(); 124 visitChildren((c, p, d) -> { 125 @SuppressWarnings("unchecked") 126 List<Cursor> a = (List<Cursor>) d; 127 a.add(c); 128 return VisitResult.Continue; 129 }, ar); 130 return ar.stream(); 131 } 132 133 public Stream<Cursor> stream() { 134 return children().flatMap(c -> Stream.concat(Stream.of(c), c.children())); 135 } 136 }