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1 /*
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2 * Copyright 1999-2003 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // ciConstant
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26 //
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27 // This class represents a constant value.
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28 class ciConstant VALUE_OBJ_CLASS_SPEC {
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29 private:
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30 friend class ciEnv;
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31 friend class ciField;
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32
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33 BasicType _type;
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34 union {
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35 jint _int;
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36 jlong _long;
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37 jint _long_half[2];
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38 jfloat _float;
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39 jdouble _double;
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40 ciObject* _object;
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41 } _value;
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42
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43 // Implementation of the print method.
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44 void print_impl(outputStream* st);
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45
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46 public:
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47
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48 ciConstant() {
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49 _type = T_ILLEGAL; _value._long = -1;
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50 }
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51 ciConstant(BasicType type, jint value) {
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52 assert(type != T_LONG && type != T_DOUBLE && type != T_FLOAT,
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53 "using the wrong ciConstant constructor");
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54 _type = type; _value._int = value;
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55 }
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56 ciConstant(jlong value) {
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57 _type = T_LONG; _value._long = value;
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58 }
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59 ciConstant(jfloat value) {
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60 _type = T_FLOAT; _value._float = value;
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61 }
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62 ciConstant(jdouble value) {
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63 _type = T_DOUBLE; _value._double = value;
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64 }
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65 ciConstant(BasicType type, ciObject* p) {
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66 _type = type; _value._object = p;
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67 }
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68
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69 BasicType basic_type() const { return _type; }
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70
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71 jboolean as_boolean() {
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72 assert(basic_type() == T_BOOLEAN, "wrong type");
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73 return (jboolean)_value._int;
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74 }
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75 jchar as_char() {
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76 assert(basic_type() == T_CHAR, "wrong type");
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77 return (jchar)_value._int;
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78 }
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79 jbyte as_byte() {
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80 assert(basic_type() == T_BYTE, "wrong type");
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81 return (jbyte)_value._int;
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82 }
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83 jshort as_short() {
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84 assert(basic_type() == T_SHORT, "wrong type");
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85 return (jshort)_value._int;
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86 }
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87 jint as_int() {
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88 assert(basic_type() == T_BOOLEAN || basic_type() == T_CHAR ||
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89 basic_type() == T_BYTE || basic_type() == T_SHORT ||
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90 basic_type() == T_INT, "wrong type");
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91 return _value._int;
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92 }
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93 jlong as_long() {
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94 assert(basic_type() == T_LONG, "wrong type");
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95 return _value._long;
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96 }
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97 jfloat as_float() {
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98 assert(basic_type() == T_FLOAT, "wrong type");
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99 return _value._float;
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100 }
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101 jdouble as_double() {
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102 assert(basic_type() == T_DOUBLE, "wrong type");
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103 return _value._double;
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104 }
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105 ciObject* as_object() const {
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106 assert(basic_type() == T_OBJECT || basic_type() == T_ARRAY, "wrong type");
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107 return _value._object;
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108 }
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109
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110 // Debugging output
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111 void print();
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112 };
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