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| 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 | */ | ||
| 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 | */ | ||
| 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 | */ | ||
| 72 | public Object getValue() { | ||
| 73 | return new Integer(value); | ||
| 74 | } | ||
| 75 | |||
| 76 | /** | ||
| 77 | * Check if the expression is equal to a value | ||
| 78 | */ | ||
| 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 | */ | ||
| 86 | public boolean equalsDefault() { | ||
| 87 | return value == 0; | ||
| 88 | } | ||
| 89 | |||
| 90 | /** | ||
| 91 | * Code | ||
| 92 | */ | ||
| 93 | public void codeValue(Environment env, Context ctx, Assembler asm) { | ||
| 94 | asm.add(where, opc_ldc, new Integer(value)); | ||
| 95 | } | ||
| 96 | } | ||