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30 package org.objectweb.asm.commons;
31
32 import org.objectweb.asm.Label;
33 import org.objectweb.asm.MethodAdapter;
34 import org.objectweb.asm.MethodVisitor;
35 import org.objectweb.asm.Opcodes;
36
37
42 public class CodeSizeEvaluator extends MethodAdapter implements Opcodes {
43
44 private int minSize;
45
46 private int maxSize;
47
48 public CodeSizeEvaluator(final MethodVisitor mv) {
49 super(mv);
50 }
51
52 public int getMinSize() {
53 return this.minSize;
54 }
55
56 public int getMaxSize() {
57 return this.maxSize;
58 }
59
60 public void visitInsn(final int opcode) {
61 minSize += 1;
62 maxSize += 1;
63 if (mv != null) {
64 mv.visitInsn(opcode);
65 }
66 }
67
68 public void visitIntInsn(final int opcode, final int operand) {
69 if (opcode == SIPUSH) {
70 minSize += 3;
71 maxSize += 3;
72 } else {
73 minSize += 2;
74 maxSize += 2;
75 }
76 if (mv != null) {
77 mv.visitIntInsn(opcode, operand);
78 }
79 }
80
81 public void visitVarInsn(final int opcode, final int var) {
82 if (var < 4 && opcode != Opcodes.RET) {
83 minSize += 1;
84 maxSize += 1;
85 } else if (var >= 256) {
86 minSize += 4;
87 maxSize += 4;
88 } else {
89 minSize += 2;
90 maxSize += 2;
91 }
92 if (mv != null) {
93 mv.visitVarInsn(opcode, var);
94 }
95 }
96
97 public void visitTypeInsn(final int opcode, final String  desc) {
98 minSize += 3;
99 maxSize += 3;
100 if (mv != null) {
101 mv.visitTypeInsn(opcode, desc);
102 }
103 }
104
105 public void visitFieldInsn(
106 final int opcode,
107 final String owner,
108 final String name,
109 final String desc)
110 {
111 minSize += 3;
112 maxSize += 3;
113 if (mv != null) {
114 mv.visitFieldInsn(opcode, owner, name, desc);
115 }
116 }
117
118 public void visitMethodInsn(
119 final int opcode,
120 final String owner,
121 final String name,
122 final String desc)
123 {
124 if (opcode == INVOKEINTERFACE) {
125 minSize += 5;
126 maxSize += 5;
127 } else {
128 minSize += 3;
129 maxSize += 3;
130 }
131 if (mv != null) {
132 mv.visitMethodInsn(opcode, owner, name, desc);
133 }
134 }
135
136 public void visitJumpInsn(final int opcode, final Label label) {
137 minSize += 3;
138 if (opcode == GOTO || opcode == JSR) {
139 maxSize += 5;
140 } else {
141 maxSize += 8;
142 }
143 if (mv != null) {
144 mv.visitJumpInsn(opcode, label);
145 }
146 }
147
148 public void visitLdcInsn(final Object cst) {
149 if (cst instanceof Long || cst instanceof Double ) {
150 minSize += 3;
151 maxSize += 3;
152 } else {
153 minSize += 2;
154 maxSize += 3;
155 }
156 if (mv != null) {
157 mv.visitLdcInsn(cst);
158 }
159 }
160
161 public void visitIincInsn(final int var, final int increment) {
162 if (var > 255 || increment > 127 || increment < -128) {
163 minSize += 6;
164 maxSize += 6;
165 } else {
166 minSize += 3;
167 maxSize += 3;
168 }
169 if (mv != null) {
170 mv.visitIincInsn(var, increment);
171 }
172 }
173
174 public void visitTableSwitchInsn(
175 final int min,
176 final int max,
177 final Label dflt,
178 final Label[] labels)
179 {
180 minSize += 13 + labels.length * 4;
181 maxSize += 16 + labels.length * 4;
182 if (mv != null) {
183 mv.visitTableSwitchInsn(min, max, dflt, labels);
184 }
185 }
186
187 public void visitLookupSwitchInsn(
188 final Label dflt,
189 final int[] keys,
190 final Label[] labels)
191 {
192 minSize += 9 + keys.length * 8;
193 maxSize += 12 + keys.length * 8;
194 if (mv != null) {
195 mv.visitLookupSwitchInsn(dflt, keys, labels);
196 }
197 }
198
199 public void visitMultiANewArrayInsn(final String desc, final int dims) {
200 minSize += 4;
201 maxSize += 4;
202 if (mv != null) {
203 mv.visitMultiANewArrayInsn(desc, dims);
204 }
205 }
206 }
207 |
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