129 lines
5.3 KiB
C++
129 lines
5.3 KiB
C++
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_LIBDEXFILE_DEX_SIGNATURE_INL_H_
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#define ART_LIBDEXFILE_DEX_SIGNATURE_INL_H_
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#include "signature.h"
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#include "dex_file-inl.h"
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namespace art {
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inline bool Signature::operator==(const Signature& rhs) const {
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if (dex_file_ == nullptr) {
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return rhs.dex_file_ == nullptr;
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}
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if (rhs.dex_file_ == nullptr) {
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return false;
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}
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if (dex_file_ == rhs.dex_file_) {
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return proto_id_ == rhs.proto_id_;
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}
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std::string_view lhs_shorty = dex_file_->GetShortyView(*proto_id_);
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if (lhs_shorty != rhs.dex_file_->GetShortyView(*rhs.proto_id_)) {
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return false; // Shorty mismatch.
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}
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if (lhs_shorty[0] == 'L') {
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const dex::TypeId& return_type_id = dex_file_->GetTypeId(proto_id_->return_type_idx_);
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const dex::TypeId& rhs_return_type_id =
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rhs.dex_file_->GetTypeId(rhs.proto_id_->return_type_idx_);
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if (!DexFile::StringEquals(dex_file_, return_type_id.descriptor_idx_,
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rhs.dex_file_, rhs_return_type_id.descriptor_idx_)) {
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return false; // Return type mismatch.
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}
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}
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if (lhs_shorty.find('L', 1) != std::string_view::npos) {
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const dex::TypeList* lhs_params = dex_file_->GetProtoParameters(*proto_id_);
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const dex::TypeList* rhs_params = rhs.dex_file_->GetProtoParameters(*rhs.proto_id_);
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// We found a reference parameter in the matching shorty, so both lists must be non-empty.
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DCHECK(lhs_params != nullptr);
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DCHECK(rhs_params != nullptr);
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uint32_t params_size = lhs_shorty.size() - 1u;
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DCHECK_EQ(params_size, lhs_params->Size()); // Parameter list sizes must match shorty.
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DCHECK_EQ(params_size, rhs_params->Size());
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for (uint32_t i = 0; i < params_size; ++i) {
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const dex::TypeId& lhs_param_id = dex_file_->GetTypeId(lhs_params->GetTypeItem(i).type_idx_);
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const dex::TypeId& rhs_param_id =
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rhs.dex_file_->GetTypeId(rhs_params->GetTypeItem(i).type_idx_);
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if (!DexFile::StringEquals(dex_file_, lhs_param_id.descriptor_idx_,
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rhs.dex_file_, rhs_param_id.descriptor_idx_)) {
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return false; // Parameter type mismatch.
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}
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}
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}
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return true;
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}
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inline int Signature::Compare(const Signature& rhs) const {
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DCHECK(dex_file_ != nullptr);
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DCHECK(rhs.dex_file_ != nullptr);
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if (dex_file_ == rhs.dex_file_) {
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return static_cast<int>(dex_file_->GetIndexForProtoId(*proto_id_).index_) -
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static_cast<int>(rhs.dex_file_->GetIndexForProtoId(*rhs.proto_id_).index_);
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}
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// Use shorty to avoid looking at primitive type descriptors
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// as long as they are not compared with reference descriptors.
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std::string_view lhs_shorty = dex_file_->GetShortyView(*proto_id_);
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std::string_view rhs_shorty = rhs.dex_file_->GetShortyView(*rhs.proto_id_);
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// Note that 'L' in a shorty can represent an array type starting with '[',
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// so do the full type descriptor comparison when we see 'L' in either shorty.
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if (lhs_shorty[0] == 'L' || rhs_shorty[0] == 'L') {
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std::string_view lhs_return_type = dex_file_->GetTypeDescriptorView(
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dex_file_->GetTypeId(proto_id_->return_type_idx_));
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std::string_view rhs_return_type = rhs.dex_file_->GetTypeDescriptorView(
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rhs.dex_file_->GetTypeId(rhs.proto_id_->return_type_idx_));
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int cmp_result = lhs_return_type.compare(rhs_return_type);
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if (cmp_result != 0) {
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return cmp_result;
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}
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} else if (lhs_shorty[0] != rhs_shorty[0]) {
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return static_cast<int>(lhs_shorty[0]) - static_cast<int>(rhs_shorty[0]);
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}
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size_t min_shorty_size = std::min(lhs_shorty.size(), rhs_shorty.size());
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if (min_shorty_size != 1u) { // If both shortys contain parameters, compare parameters.
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const dex::TypeList* lhs_params = dex_file_->GetProtoParameters(*proto_id_);
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const dex::TypeList* rhs_params = rhs.dex_file_->GetProtoParameters(*rhs.proto_id_);
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DCHECK(lhs_params != nullptr);
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DCHECK(rhs_params != nullptr);
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for (size_t i = 1u; i != min_shorty_size; ++i) {
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if (lhs_shorty[i] == 'L' || rhs_shorty[i] == 'L') {
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std::string_view lhs_param_type = dex_file_->GetTypeDescriptorView(
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dex_file_->GetTypeId(lhs_params->GetTypeItem(i - 1u).type_idx_));
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std::string_view rhs_param_type = rhs.dex_file_->GetTypeDescriptorView(
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rhs.dex_file_->GetTypeId(rhs_params->GetTypeItem(i - 1u).type_idx_));
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int cmp_result = lhs_param_type.compare(rhs_param_type);
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if (cmp_result != 0) {
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return cmp_result;
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}
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} else if (lhs_shorty[i] != rhs_shorty[i]) {
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return static_cast<int>(lhs_shorty[i]) - static_cast<int>(rhs_shorty[i]);
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}
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}
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}
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if (lhs_shorty.size() == rhs_shorty.size()) {
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return 0;
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} else if (lhs_shorty.size() < rhs_shorty.size()) {
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return -1;
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} else {
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return 1;
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}
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}
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} // namespace art
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#endif // ART_LIBDEXFILE_DEX_SIGNATURE_INL_H_
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