| /* |
| * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| package sun.jvm.hotspot.utilities; |
| |
| import sun.jvm.hotspot.runtime.BasicType; |
| |
| public class ConstantTag { |
| // These replicated from the VM to save space |
| private static final int JVM_CONSTANT_Utf8 = 1; |
| private static final int JVM_CONSTANT_Unicode = 2; // unused |
| private static final int JVM_CONSTANT_Integer = 3; |
| private static final int JVM_CONSTANT_Float = 4; |
| private static final int JVM_CONSTANT_Long = 5; |
| private static final int JVM_CONSTANT_Double = 6; |
| private static final int JVM_CONSTANT_Class = 7; |
| private static final int JVM_CONSTANT_String = 8; |
| private static final int JVM_CONSTANT_Fieldref = 9; |
| private static final int JVM_CONSTANT_Methodref = 10; |
| private static final int JVM_CONSTANT_InterfaceMethodref = 11; |
| private static final int JVM_CONSTANT_NameAndType = 12; |
| private static final int JVM_CONSTANT_MethodHandle = 15; // JSR 292 |
| private static final int JVM_CONSTANT_MethodType = 16; // JSR 292 |
| // static final int JVM_CONSTANT_(unused) = 17; // JSR 292 early drafts only |
| private static final int JVM_CONSTANT_InvokeDynamic = 18; // JSR 292 |
| private static final int JVM_CONSTANT_Invalid = 0; // For bad value initialization |
| private static final int JVM_CONSTANT_UnresolvedClass = 100; // Temporary tag until actual use |
| private static final int JVM_CONSTANT_ClassIndex = 101; // Temporary tag while constructing constant pool |
| private static final int JVM_CONSTANT_StringIndex = 102; // Temporary tag while constructing constant pool |
| private static final int JVM_CONSTANT_UnresolvedClassInError = 103; // Resolution failed |
| private static final int JVM_CONSTANT_MethodHandleInError = 104; // Error tag due to resolution error |
| private static final int JVM_CONSTANT_MethodTypeInError = 105; // Error tag due to resolution error |
| |
| // JVM_CONSTANT_MethodHandle subtypes //FIXME: connect these to data structure |
| private static int JVM_REF_getField = 1; |
| private static int JVM_REF_getStatic = 2; |
| private static int JVM_REF_putField = 3; |
| private static int JVM_REF_putStatic = 4; |
| private static int JVM_REF_invokeVirtual = 5; |
| private static int JVM_REF_invokeStatic = 6; |
| private static int JVM_REF_invokeSpecial = 7; |
| private static int JVM_REF_newInvokeSpecial = 8; |
| private static int JVM_REF_invokeInterface = 9; |
| |
| private byte tag; |
| |
| public ConstantTag(byte tag) { |
| this.tag = tag; |
| } |
| |
| public int value() { return tag; } |
| |
| public boolean isKlass() { return tag == JVM_CONSTANT_Class; } |
| public boolean isField () { return tag == JVM_CONSTANT_Fieldref; } |
| public boolean isMethod() { return tag == JVM_CONSTANT_Methodref; } |
| public boolean isInterfaceMethod() { return tag == JVM_CONSTANT_InterfaceMethodref; } |
| public boolean isString() { return tag == JVM_CONSTANT_String; } |
| public boolean isInt() { return tag == JVM_CONSTANT_Integer; } |
| public boolean isFloat() { return tag == JVM_CONSTANT_Float; } |
| public boolean isLong() { return tag == JVM_CONSTANT_Long; } |
| public boolean isDouble() { return tag == JVM_CONSTANT_Double; } |
| public boolean isNameAndType() { return tag == JVM_CONSTANT_NameAndType; } |
| public boolean isUtf8() { return tag == JVM_CONSTANT_Utf8; } |
| public boolean isMethodHandle() { return tag == JVM_CONSTANT_MethodHandle; } |
| public boolean isMethodType() { return tag == JVM_CONSTANT_MethodType; } |
| public boolean isInvokeDynamic() { return tag == JVM_CONSTANT_InvokeDynamic; } |
| |
| public boolean isInvalid() { return tag == JVM_CONSTANT_Invalid; } |
| |
| public boolean isUnresolvedKlass() { |
| return tag == JVM_CONSTANT_UnresolvedClass || tag == JVM_CONSTANT_UnresolvedClassInError; |
| } |
| public boolean isUnresolveKlassInError() { return tag == JVM_CONSTANT_UnresolvedClassInError; } |
| public boolean isKlassIndex() { return tag == JVM_CONSTANT_ClassIndex; } |
| public boolean isStringIndex() { return tag == JVM_CONSTANT_StringIndex; } |
| |
| public boolean isKlassReference() { return isKlassIndex() || isUnresolvedKlass(); } |
| public boolean isFieldOrMethod() { return isField() || isMethod() || isInterfaceMethod(); } |
| public boolean isSymbol() { return isUtf8(); } |
| |
| public BasicType basicType() { |
| switch (tag) { |
| case JVM_CONSTANT_Integer : |
| return BasicType.T_INT; |
| case JVM_CONSTANT_Float : |
| return BasicType.T_FLOAT; |
| case JVM_CONSTANT_Long : |
| return BasicType.T_LONG; |
| case JVM_CONSTANT_Double : |
| return BasicType.T_DOUBLE; |
| |
| case JVM_CONSTANT_Class : |
| case JVM_CONSTANT_String : |
| case JVM_CONSTANT_UnresolvedClass : |
| case JVM_CONSTANT_UnresolvedClassInError : |
| case JVM_CONSTANT_MethodHandleInError : |
| case JVM_CONSTANT_MethodTypeInError : |
| case JVM_CONSTANT_ClassIndex : |
| case JVM_CONSTANT_StringIndex : |
| case JVM_CONSTANT_MethodHandle : |
| case JVM_CONSTANT_MethodType : |
| return BasicType.T_OBJECT; |
| default: |
| throw new InternalError("unexpected tag: " + tag); |
| } |
| } |
| |
| public String toString() { |
| return "ConstantTag:" + Integer.toString(tag); |
| } |
| } |