1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef ART_RUNTIME_DEX_INSTRUCTION_VISITOR_H_
18#define ART_RUNTIME_DEX_INSTRUCTION_VISITOR_H_
19
20#include "base/macros.h"
21#include "dex_instruction.h"
22
23namespace art {
24
25template<typename T>
26class DexInstructionVisitor {
27 public:
28  void Visit(const uint16_t* code, size_t size_in_bytes) {
29    T* derived = static_cast<T*>(this);
30    size_t size_in_code_units = size_in_bytes / sizeof(uint16_t);
31    size_t i = 0;
32    while (i < size_in_code_units) {
33      const Instruction* inst = Instruction::At(&code[i]);
34      switch (inst->Opcode()) {
35#define INSTRUCTION_CASE(o, cname, p, f, r, i, a, v)  \
36        case Instruction::cname: {                    \
37          derived->Do_ ## cname(inst);                \
38          break;                                      \
39        }
40#include "dex_instruction_list.h"
41        DEX_INSTRUCTION_LIST(INSTRUCTION_CASE)
42#undef DEX_INSTRUCTION_LIST
43#undef INSTRUCTION_CASE
44        default:
45          CHECK(false);
46      }
47      i += inst->SizeInCodeUnits();
48    }
49  }
50
51 private:
52  // Specific handlers for each instruction.
53#define INSTRUCTION_VISITOR(o, cname, p, f, r, i, a, v)    \
54  void Do_ ## cname(const Instruction* inst) {             \
55    T* derived = static_cast<T*>(this);                    \
56    derived->Do_Default(inst);                             \
57  }
58#include "dex_instruction_list.h"
59  DEX_INSTRUCTION_LIST(INSTRUCTION_VISITOR)
60#undef DEX_INSTRUCTION_LIST
61#undef INSTRUCTION_VISITOR
62
63  // The default instruction handler.
64  void Do_Default(const Instruction*) {
65    return;
66  }
67};
68
69
70}  // namespace art
71
72#endif  // ART_RUNTIME_DEX_INSTRUCTION_VISITOR_H_
73