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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ART_RUNTIME_DEX_METHOD_ITERATOR_H_
#define ART_RUNTIME_DEX_METHOD_ITERATOR_H_
#include <vector>
#include "dex_file.h"
namespace art {
class DexMethodIterator {
public:
explicit DexMethodIterator(const std::vector<const DexFile*>& dex_files)
: dex_files_(dex_files),
found_next_(false),
dex_file_index_(0),
class_def_index_(0),
class_def_(nullptr),
class_data_(nullptr),
direct_method_(false) {
CHECK_NE(0U, dex_files_.size());
}
bool HasNext() {
if (found_next_) {
return true;
}
while (true) {
// End of DexFiles, we are done.
if (dex_file_index_ == dex_files_.size()) {
return false;
}
if (class_def_index_ == GetDexFileInternal().NumClassDefs()) {
// End of this DexFile, advance and retry.
class_def_index_ = 0;
dex_file_index_++;
continue;
}
if (class_def_ == nullptr) {
class_def_ = &GetDexFileInternal().GetClassDef(class_def_index_);
}
if (class_data_ == nullptr) {
class_data_ = GetDexFileInternal().GetClassData(*class_def_);
if (class_data_ == nullptr) {
// empty class, such as a marker interface
// End of this class, advance and retry.
class_def_ = nullptr;
class_def_index_++;
continue;
}
}
if (it_.get() == nullptr) {
it_.reset(new ClassDataItemIterator(GetDexFileInternal(), class_data_));
// Skip fields
while (GetIterator().HasNextStaticField()) {
GetIterator().Next();
}
while (GetIterator().HasNextInstanceField()) {
GetIterator().Next();
}
direct_method_ = true;
}
if (direct_method_ && GetIterator().HasNextDirectMethod()) {
// Found method
found_next_ = true;
return true;
}
direct_method_ = false;
if (GetIterator().HasNextVirtualMethod()) {
// Found method
found_next_ = true;
return true;
}
// End of this class, advance and retry.
DCHECK(!GetIterator().HasNext());
it_.reset(nullptr);
class_data_ = nullptr;
class_def_ = nullptr;
class_def_index_++;
}
}
void Next() {
found_next_ = false;
if (it_.get() != nullptr) {
// Advance to next method if we currently are looking at a class.
GetIterator().Next();
}
}
const DexFile& GetDexFile() {
CHECK(HasNext());
return GetDexFileInternal();
}
uint32_t GetMemberIndex() {
CHECK(HasNext());
return GetIterator().GetMemberIndex();
}
InvokeType GetInvokeType() {
CHECK(HasNext());
CHECK(class_def_ != nullptr);
return GetIterator().GetMethodInvokeType(*class_def_);
}
private:
ClassDataItemIterator& GetIterator() const {
CHECK(it_.get() != nullptr);
return *it_.get();
}
const DexFile& GetDexFileInternal() const {
CHECK_LT(dex_file_index_, dex_files_.size());
const DexFile* dex_file = dex_files_[dex_file_index_];
CHECK(dex_file != nullptr);
return *dex_file;
}
const std::vector<const DexFile*>& dex_files_;
bool found_next_;
uint32_t dex_file_index_;
uint32_t class_def_index_;
const DexFile::ClassDef* class_def_;
const uint8_t* class_data_;
std::unique_ptr<ClassDataItemIterator> it_;
bool direct_method_;
};
} // namespace art
#endif // ART_RUNTIME_DEX_METHOD_ITERATOR_H_
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