1 /* 2 * Copyright (c) 1994, 2003, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package sun.tools.tree; 27 28 import sun.tools.java.*; 29 import sun.tools.asm.Assembler; 30 31 /** 32 * WARNING: The contents of this source file are not part of any 33 * supported API. Code that depends on them does so at its own risk: 34 * they are subject to change or removal without notice. 35 */ 36 public 37 class IntegerExpression extends ConstantExpression { 38 int value; 39 40 /** 41 * Constructor 42 */ IntegerExpression(int op, long where, Type type, int value)43 IntegerExpression(int op, long where, Type type, int value) { 44 super(op, where, type); 45 this.value = value; 46 } 47 48 /** 49 * See if this number fits in the given type. 50 */ fitsType(Environment env, Context ctx, Type t)51 public boolean fitsType(Environment env, Context ctx, Type t) { 52 if (this.type.isType(TC_CHAR)) { 53 // A char constant is not really an int constant, 54 // so do not report that 'a' fits in a byte or short, 55 // even if its value is in fact 7-bit ascii. See JLS 5.2. 56 return super.fitsType(env, ctx, t); 57 } 58 switch (t.getTypeCode()) { 59 case TC_BYTE: 60 return value == (byte)value; 61 case TC_SHORT: 62 return value == (short)value; 63 case TC_CHAR: 64 return value == (char)value; 65 } 66 return super.fitsType(env, ctx, t); 67 } 68 69 /** 70 * Get the value 71 */ getValue()72 public Object getValue() { 73 return value; 74 } 75 76 /** 77 * Check if the expression is equal to a value 78 */ equals(int i)79 public boolean equals(int i) { 80 return value == i; 81 } 82 83 /** 84 * Check if the expression is equal to its default static value 85 */ equalsDefault()86 public boolean equalsDefault() { 87 return value == 0; 88 } 89 90 /** 91 * Code 92 */ codeValue(Environment env, Context ctx, Assembler asm)93 public void codeValue(Environment env, Context ctx, Assembler asm) { 94 asm.add(where, opc_ldc, value); 95 } 96 } 97