1 /* 2 * Copyright (c) 1999, 2011, 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 25 #ifndef SHARE_VM_CI_CICONSTANT_HPP 26 #define SHARE_VM_CI_CICONSTANT_HPP 27 28 #include "ci/ciClassList.hpp" 29 #include "ci/ciNullObject.hpp" 30 31 // ciConstant 32 // 33 // This class represents a constant value. 34 class ciConstant VALUE_OBJ_CLASS_SPEC { 35 friend class VMStructs; 36 private: 37 friend class ciEnv; 38 friend class ciField; 39 40 BasicType _type; 41 union { 42 jint _int; 43 jlong _long; 44 jint _long_half[2]; 45 jfloat _float; 46 jdouble _double; 47 ciObject* _object; 48 } _value; 49 50 public: 51 52 ciConstant() { 53 _type = T_ILLEGAL; _value._long = -1; 54 } 55 ciConstant(BasicType type, jint value) { 56 assert(type != T_LONG && type != T_DOUBLE && type != T_FLOAT, 57 "using the wrong ciConstant constructor"); 58 _type = type; _value._int = value; 59 } 60 ciConstant(jlong value) { 61 _type = T_LONG; _value._long = value; 62 } 63 ciConstant(jfloat value) { 64 _type = T_FLOAT; _value._float = value; 65 } 66 ciConstant(jdouble value) { 67 _type = T_DOUBLE; _value._double = value; 68 } 69 ciConstant(BasicType type, ciObject* p) { 70 _type = type; _value._object = p; 71 } 72 73 BasicType basic_type() const { return _type; } 74 75 jboolean as_boolean() { 76 assert(basic_type() == T_BOOLEAN, "wrong type"); 77 return (jboolean)_value._int; 78 } 79 jchar as_char() { 80 assert(basic_type() == T_CHAR, "wrong type"); 81 return (jchar)_value._int; 82 } 83 jbyte as_byte() { 84 assert(basic_type() == T_BYTE, "wrong type"); 85 return (jbyte)_value._int; 86 } 87 jshort as_short() { 88 assert(basic_type() == T_SHORT, "wrong type"); 89 return (jshort)_value._int; 90 } 91 jint as_int() { 92 assert(basic_type() == T_BOOLEAN || basic_type() == T_CHAR || 93 basic_type() == T_BYTE || basic_type() == T_SHORT || 94 basic_type() == T_INT, "wrong type"); 95 return _value._int; 96 } 97 jlong as_long() { 98 assert(basic_type() == T_LONG, "wrong type"); 99 return _value._long; 100 } 101 jfloat as_float() { 102 assert(basic_type() == T_FLOAT, "wrong type"); 103 return _value._float; 104 } 105 jdouble as_double() { 106 assert(basic_type() == T_DOUBLE, "wrong type"); 107 return _value._double; 108 } 109 ciObject* as_object() const { 110 assert(basic_type() == T_OBJECT || basic_type() == T_ARRAY, "wrong type"); 111 return _value._object; 112 } 113 114 // Debugging output 115 void print(); 116 }; 117 118 #endif // SHARE_VM_CI_CICONSTANT_HPP