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1
15
16 package javassist.compiler.ast;
17
18 import javassist.compiler.CompileError;
19 import javassist.compiler.TokenId;
20
21
24 public class IntConst extends ASTree {
25 protected long value;
26 protected int type;
27
28 public IntConst(long v, int tokenId) { value = v; type = tokenId; }
29
30 public long get() { return value; }
31
32 public void set(long v) { value = v; }
33
34
36 public int getType() { return type; }
37
38 public String  toString() { return Long.toString(value); }
39
40 public void accept(Visitor v) throws CompileError {
41 v.atIntConst(this);
42 }
43
44 public ASTree compute(int op, ASTree right) {
45 if (right instanceof IntConst)
46 return compute0(op, (IntConst)right);
47 else if (right instanceof DoubleConst)
48 return compute0(op, (DoubleConst)right);
49 else
50 return null;
51 }
52
53 private IntConst compute0(int op, IntConst right) {
54 int type1 = this.type;
55 int type2 = right.type;
56 int newType;
57 if (type1 == TokenId.LongConstant || type2 == TokenId.LongConstant)
58 newType = TokenId.LongConstant;
59 else if (type1 == TokenId.CharConstant
60 && type2 == TokenId.CharConstant)
61 newType = TokenId.CharConstant;
62 else
63 newType = TokenId.IntConstant;
64
65 long value1 = this.value;
66 long value2 = right.value;
67 long newValue;
68 switch (op) {
69 case '+' :
70 newValue = value1 + value2;
71 break;
72 case '-' :
73 newValue = value1 - value2;
74 break;
75 case '*' :
76 newValue = value1 * value2;
77 break;
78 case '/' :
79 newValue = value1 / value2;
80 break;
81 case '%' :
82 newValue = value1 % value2;
83 break;
84 case '|' :
85 newValue = value1 | value2;
86 break;
87 case '^' :
88 newValue = value1 ^ value2;
89 break;
90 case '&' :
91 newValue = value1 & value2;
92 break;
93 case TokenId.LSHIFT :
94 newValue = value << (int)value2;
95 newType = type1;
96 break;
97 case TokenId.RSHIFT :
98 newValue = value >> (int)value2;
99 newType = type1;
100 break;
101 case TokenId.ARSHIFT :
102 newValue = value >>> (int)value2;
103 newType = type1;
104 break;
105 default :
106 return null;
107 }
108
109 return new IntConst(newValue, newType);
110 }
111
112 private DoubleConst compute0(int op, DoubleConst right) {
113 double value1 = (double)this.value;
114 double value2 = right.value;
115 double newValue;
116 switch (op) {
117 case '+' :
118 newValue = value1 + value2;
119 break;
120 case '-' :
121 newValue = value1 - value2;
122 break;
123 case '*' :
124 newValue = value1 * value2;
125 break;
126 case '/' :
127 newValue = value1 / value2;
128 break;
129 case '%' :
130 newValue = value1 % value2;
131 break;
132 default :
133 return null;
134 }
135
136 return new DoubleConst(newValue, right.type);
137 }
138 }
139 |
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