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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 }; |