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/*
* Copyright (C) 2018 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_LIBDEXFILE_DEX_CLASS_ITERATOR_H_
#define ART_LIBDEXFILE_DEX_CLASS_ITERATOR_H_
#include <android-base/logging.h>
namespace art {
class ClassAccessor;
class ClassIterator;
class DexFile;
// Holder class, used to construct ClassAccessors.
class ClassIteratorData {
public:
ClassIteratorData(const DexFile& dex_file, uint32_t class_def_idx)
: dex_file_(dex_file),
class_def_idx_(class_def_idx) {}
private:
const DexFile& dex_file_;
uint32_t class_def_idx_ = 0u;
friend class ClassAccessor;
friend class ClassIterator;
};
// Iterator for visiting classes in a Dex file.
class ClassIterator {
public:
using iterator_category = std::forward_iterator_tag;
using value_type = ClassIteratorData;
using difference_type = std::ptrdiff_t;
using pointer = ClassIteratorData*;
using reference = ClassIteratorData&;
ClassIterator(const DexFile& dex_file, uint32_t class_def_idx)
: data_(dex_file, class_def_idx) {}
// Value after modification.
ClassIterator& operator++() {
++data_.class_def_idx_;
return *this;
}
// Value before modification.
ClassIterator operator++(int) {
ClassIterator temp = *this;
++*this;
return temp;
}
const value_type& operator*() const {
return data_;
}
bool operator==(const ClassIterator& rhs) const {
DCHECK_EQ(&data_.dex_file_, &rhs.data_.dex_file_) << "Comparing different dex files.";
return data_.class_def_idx_ == rhs.data_.class_def_idx_;
}
bool operator!=(const ClassIterator& rhs) const {
return !(*this == rhs);
}
bool operator<(const ClassIterator& rhs) const {
DCHECK_EQ(&data_.dex_file_, &rhs.data_.dex_file_) << "Comparing different dex files.";
return data_.class_def_idx_ < rhs.data_.class_def_idx_;
}
bool operator>(const ClassIterator& rhs) const {
return rhs < *this;
}
bool operator<=(const ClassIterator& rhs) const {
return !(rhs < *this);
}
bool operator>=(const ClassIterator& rhs) const {
return !(*this < rhs);
}
protected:
ClassIteratorData data_;
};
} // namespace art
#endif // ART_LIBDEXFILE_DEX_CLASS_ITERATOR_H_