1 /*
2 * Copyright (c) 1999, 2025, 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_CI_CICONSTANT_HPP
26 #define SHARE_CI_CICONSTANT_HPP
27
28 #include "ci/ciClassList.hpp"
29 #include "utilities/globalDefinitions.hpp"
30
31 // ciConstant
32 //
33 // This class represents a constant value.
34 class ciConstant {
35 private:
36 friend class ciEnv;
37 friend class ciField;
38
39 BasicType _type;
40 union {
41 jint _int;
42 jlong _long;
43 jfloat _float;
44 jdouble _double;
45 ciObject* _object;
46 } _value;
47
48 public:
49
50 ciConstant() {
51 _type = T_ILLEGAL; _value._long = -1;
52 }
53 ciConstant(BasicType type, jint value) {
54 assert(type != T_LONG && type != T_DOUBLE && type != T_FLOAT,
55 "using the wrong ciConstant constructor");
56 _type = type; _value._int = value;
57 }
58 ciConstant(jlong value) {
59 _type = T_LONG; _value._long = value;
60 }
61 ciConstant(jfloat value) {
62 _type = T_FLOAT; _value._float = value;
63 }
64 ciConstant(jdouble value) {
65 _type = T_DOUBLE; _value._double = value;
66 }
67 ciConstant(BasicType type, ciObject* p) {
68 _type = type; _value._object = p;
69 }
70
71 BasicType basic_type() const { return _type; }
72
73 jboolean as_boolean() {
74 assert(basic_type() == T_BOOLEAN, "wrong type");
75 return (jboolean)_value._int;
76 }
77 jchar as_char() {
78 assert(basic_type() == T_CHAR, "wrong type");
79 return (jchar)_value._int;
80 }
81 jbyte as_byte() {
82 assert(basic_type() == T_BYTE, "wrong type");
83 return (jbyte)_value._int;
84 }
85 jshort as_short() {
86 assert(basic_type() == T_SHORT, "wrong type");
87 return (jshort)_value._int;
88 }
89 jint as_int() {
90 assert(basic_type() == T_BOOLEAN || basic_type() == T_CHAR ||
91 basic_type() == T_BYTE || basic_type() == T_SHORT ||
92 basic_type() == T_INT, "wrong type");
93 return _value._int;
94 }
95 jlong as_long() {
96 assert(basic_type() == T_LONG, "wrong type");
97 return _value._long;
98 }
99 jfloat as_float() {
100 assert(basic_type() == T_FLOAT, "wrong type");
101 return _value._float;
102 }
103 jdouble as_double() {
104 assert(basic_type() == T_DOUBLE, "wrong type");
105 return _value._double;
106 }
107 ciObject* as_object() const {
108 assert(is_reference_type(basic_type()), "wrong type");
109 return _value._object;
110 }
111
112 bool is_null_or_zero() const;
113
114 bool is_valid() const {
115 return basic_type() != T_ILLEGAL;
116 }
117
118 bool is_loaded() const;
119
120 // Debugging output
121 void print();
122 };
123
124 #endif // SHARE_CI_CICONSTANT_HPP