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 com.sun.tools.jextract; 25 26 import java.foreign.layout.Function; 27 import java.foreign.layout.Layout; 28 import java.util.function.BiFunction; 29 import javax.lang.model.SourceVersion; 30 import jdk.internal.clang.Type; 31 import com.sun.tools.jextract.tree.LayoutUtils; 32 33 /** 34 * General utility functions 35 */ 36 public class Utils { 37 public static void validSimpleIdentifier(String name) { 38 int length = name.length(); 39 if (length == 0) { 40 throw new IllegalArgumentException(); 41 } 42 43 int ch = name.codePointAt(0); 44 if (length == 1 && ch == '_') { 45 throw new IllegalArgumentException("'_' is no longer valid identifier."); 46 } 47 48 if (!Character.isJavaIdentifierStart(ch)) { 49 throw new IllegalArgumentException("Invalid start character for an identifier: " + ch); 50 } 51 52 for (int i = 1; i < length; i++) { 53 ch = name.codePointAt(i); 54 if (!Character.isJavaIdentifierPart(ch)) { 55 throw new IllegalArgumentException("Invalid character for an identifier: " + ch); 56 } 57 } 58 } 59 60 public static void validPackageName(String name) { 61 if (name.isEmpty()) { 62 throw new IllegalArgumentException(); 63 } 64 int idx = name.lastIndexOf('.'); 65 if (idx == -1) { 66 validSimpleIdentifier(name); 67 } else { 68 validSimpleIdentifier(name.substring(idx + 1)); 69 validPackageName(name.substring(0, idx)); 70 } 71 } 72 73 public static String toJavaIdentifier(String str) { 74 final int size = str.length(); 75 StringBuilder sb = new StringBuilder(size); 76 if (! Character.isJavaIdentifierStart(str.charAt(0))) { 77 sb.append('_'); 78 } 79 for (int i = 0; i < size; i++) { 80 char ch = str.charAt(i); 81 if (Character.isJavaIdentifierPart(ch)) { 82 sb.append(ch); 83 } else { 84 sb.append('_'); 85 } 86 } 87 return sb.toString(); 88 } 89 90 public static String toClassName(String cname) { 91 StringBuilder sb = new StringBuilder(cname.length()); 92 cname = toJavaIdentifier(cname); 93 sb.append(cname); 94 if (SourceVersion.isKeyword(cname)) { 95 sb.append("$"); 96 } 97 return sb.toString(); 98 } 99 100 public static String toInternalName(String pkg, String name, String... nested) { 101 if ((pkg == null || pkg.isEmpty()) && nested == null) { 102 return name; 103 } 104 105 StringBuilder sb = new StringBuilder(); 106 if (pkg != null && ! pkg.isEmpty()) { 107 sb.append(pkg.replace('.', '/')); 108 if (sb.charAt(sb.length() - 1) != '/') { 109 sb.append('/'); 110 } 111 } 112 sb.append(name); 113 for (String n: nested) { 114 sb.append('$'); 115 sb.append(n); 116 } 117 return sb.toString(); 118 } 119 120 public static String getName(Type type) { 121 return LayoutUtils.getName(type); 122 } 123 124 public static String ClassToDescriptor(Class<?> cls) { 125 if (cls.isArray()) { 126 return cls.getName(); 127 } 128 if (cls.isPrimitive()) { 129 switch (cls.getTypeName()) { 130 case "int": 131 return "I"; 132 case "long": 133 return "J"; 134 case "byte": 135 return "B"; 136 case "char": 137 return "C"; 138 case "float": 139 return "F"; 140 case "double": 141 return "D"; 142 case "short": 143 return "S"; 144 case "boolean": 145 return "Z"; 146 case "void": 147 return "V"; 148 } 149 } 150 // assuming reference 151 return "L" + cls.getName() + ";"; 152 } 153 154 public static String DescriptorToBinaryName(String descriptor) { 155 final char[] ar = descriptor.trim().toCharArray(); 156 switch (ar[0]) { 157 case '(': 158 throw new IllegalArgumentException("Method descriptor is not allowed"); 159 case 'B': 160 return "byte"; 161 case 'C': 162 return "char"; 163 case 'D': 164 return "double"; 165 case 'F': 166 return "float"; 167 case 'I': 168 return "int"; 169 case 'J': 170 return "long"; 171 case 'S': 172 return "short"; 173 case 'Z': 174 return "boolean"; 175 } 176 177 StringBuilder sb = new StringBuilder(); 178 if (ar[0] == 'L') { 179 for (int i = 1; i < ar.length && ar[i] != ';'; i++) { 180 if (ar[i] == '/') { 181 sb.append('.'); 182 } 183 if (!Character.isJavaIdentifierPart(ar[i])) { 184 throw new IllegalArgumentException("Malformed descriptor"); 185 } 186 sb.append(ar[i]); 187 } 188 return sb.toString(); 189 } 190 191 if (ar[0] == '[') { 192 int depth = 1; 193 while (ar[depth] == '[') depth++; 194 sb.append(DescriptorToBinaryName(descriptor.substring(depth))); 195 for (int i = 0; i < depth; i++) { 196 sb.append("[]"); 197 } 198 return sb.toString(); 199 } 200 201 throw new IllegalArgumentException("Malformed descriptor"); 202 } 203 204 public static Layout getLayout(Type type) { 205 return LayoutUtils.getLayout(type); 206 } 207 208 public static Function getFunction(Type type) { 209 return LayoutUtils.getFunction(type); 210 } 211 212 public static Class<?> unboxIfNeeded(Class<?> clazz) { 213 if (clazz == Boolean.class) { 214 return boolean.class; 215 } else if (clazz == Void.class) { 216 return void.class; 217 } else if (clazz == Byte.class) { 218 return byte.class; 219 } else if (clazz == Character.class) { 220 return char.class; 221 } else if (clazz == Short.class) { 222 return short.class; 223 } else if (clazz == Integer.class) { 224 return int.class; 225 } else if (clazz == Long.class) { 226 return long.class; 227 } else if (clazz == Float.class) { 228 return float.class; 229 } else if (clazz == Double.class) { 230 return double.class; 231 } else { 232 return clazz; 233 } 234 } 235 }