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 import java.io.PrintStream; 31 import java.util.Hashtable; 32 33 /** 34 * WARNING: The contents of this source file are not part of any 35 * supported API. Code that depends on them does so at its own risk: 36 * they are subject to change or removal without notice. 37 */ 38 public 39 class ConvertExpression extends UnaryExpression { 40 /** 41 * Constructor 42 */ 43 public ConvertExpression(long where, Type type, Expression right) { 44 super(CONVERT, where, type, right); 45 } 46 47 /** 48 * Check the value 49 */ 50 public Vset checkValue(Environment env, Context ctx, Vset vset, Hashtable exp) { 51 return right.checkValue(env, ctx, vset, exp); 52 } 53 54 /** 55 * Simplify 56 */ 57 Expression simplify() { 58 switch (right.op) { 59 case BYTEVAL: 60 case CHARVAL: 61 case SHORTVAL: 62 case INTVAL: { 63 int value = ((IntegerExpression)right).value; 64 switch (type.getTypeCode()) { 65 case TC_BYTE: return new ByteExpression(right.where, (byte)value); 66 case TC_CHAR: return new CharExpression(right.where, (char)value); 67 case TC_SHORT: return new ShortExpression(right.where, (short)value); 68 case TC_INT: return new IntExpression(right.where, (int)value); 69 case TC_LONG: return new LongExpression(right.where, (long)value); 70 case TC_FLOAT: return new FloatExpression(right.where, (float)value); 71 case TC_DOUBLE: return new DoubleExpression(right.where, (double)value); 72 } 73 break; 74 } 75 case LONGVAL: { 76 long value = ((LongExpression)right).value; 77 switch (type.getTypeCode()) { 78 case TC_BYTE: return new ByteExpression(right.where, (byte)value); 79 case TC_CHAR: return new CharExpression(right.where, (char)value); 80 case TC_SHORT: return new ShortExpression(right.where, (short)value); 81 case TC_INT: return new IntExpression(right.where, (int)value); 82 case TC_FLOAT: return new FloatExpression(right.where, (float)value); 83 case TC_DOUBLE: return new DoubleExpression(right.where, (double)value); 84 } 85 break; 86 } 87 case FLOATVAL: { 88 float value = ((FloatExpression)right).value; 89 switch (type.getTypeCode()) { 90 case TC_BYTE: return new ByteExpression(right.where, (byte)value); 91 case TC_CHAR: return new CharExpression(right.where, (char)value); 92 case TC_SHORT: return new ShortExpression(right.where, (short)value); 93 case TC_INT: return new IntExpression(right.where, (int)value); 94 case TC_LONG: return new LongExpression(right.where, (long)value); 95 case TC_DOUBLE: return new DoubleExpression(right.where, (double)value); 96 } 97 break; 98 } 99 case DOUBLEVAL: { 100 double value = ((DoubleExpression)right).value; 101 switch (type.getTypeCode()) { 102 case TC_BYTE: return new ByteExpression(right.where, (byte)value); 103 case TC_CHAR: return new CharExpression(right.where, (char)value); 104 case TC_SHORT: return new ShortExpression(right.where, (short)value); 105 case TC_INT: return new IntExpression(right.where, (int)value); 106 case TC_LONG: return new LongExpression(right.where, (long)value); 107 case TC_FLOAT: return new FloatExpression(right.where, (float)value); 108 } 109 break; 110 } 111 } 112 return this; 113 } 114 115 /** 116 * Check if the expression is equal to a value 117 */ 118 public boolean equals(int i) { 119 return right.equals(i); 120 } 121 public boolean equals(boolean b) { 122 return right.equals(b); 123 } 124 125 /** 126 * Inline 127 */ 128 public Expression inline(Environment env, Context ctx) { 129 // super.inline throws away the op. 130 // This is sometimes incorrect, since casts can have side effects. 131 if (right.type.inMask(TM_REFERENCE) && type.inMask(TM_REFERENCE)) { 132 try { 133 if (!env.implicitCast(right.type, type)) 134 return inlineValue(env, ctx); 135 } catch (ClassNotFound e) { 136 throw new CompilerError(e); 137 } 138 } 139 return super.inline(env, ctx); 140 } 141 142 /** 143 * Code 144 */ 145 public void codeValue(Environment env, Context ctx, Assembler asm) { 146 right.codeValue(env, ctx, asm); 147 codeConversion(env, ctx, asm, right.type, type); 148 } 149 150 /** 151 * Print 152 */ 153 public void print(PrintStream out) { 154 out.print("(" + opNames[op] + " " + type.toString() + " "); 155 right.print(out); 156 out.print(")"); 157 } 158 }