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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_LIBDEXFILE_DEX_SIGNATURE_INL_H_
#define ART_LIBDEXFILE_DEX_SIGNATURE_INL_H_
#include "signature.h"
#include "dex_file-inl.h"
namespace art {
inline bool Signature::operator==(const Signature& rhs) const {
if (dex_file_ == nullptr) {
return rhs.dex_file_ == nullptr;
}
if (rhs.dex_file_ == nullptr) {
return false;
}
if (dex_file_ == rhs.dex_file_) {
return proto_id_ == rhs.proto_id_;
}
std::string_view lhs_shorty = dex_file_->GetShortyView(*proto_id_);
if (lhs_shorty != rhs.dex_file_->GetShortyView(*rhs.proto_id_)) {
return false; // Shorty mismatch.
}
if (lhs_shorty[0] == 'L') {
const dex::TypeId& return_type_id = dex_file_->GetTypeId(proto_id_->return_type_idx_);
const dex::TypeId& rhs_return_type_id =
rhs.dex_file_->GetTypeId(rhs.proto_id_->return_type_idx_);
if (!DexFile::StringEquals(dex_file_, return_type_id.descriptor_idx_,
rhs.dex_file_, rhs_return_type_id.descriptor_idx_)) {
return false; // Return type mismatch.
}
}
if (lhs_shorty.find('L', 1) != std::string_view::npos) {
const dex::TypeList* lhs_params = dex_file_->GetProtoParameters(*proto_id_);
const dex::TypeList* rhs_params = rhs.dex_file_->GetProtoParameters(*rhs.proto_id_);
// We found a reference parameter in the matching shorty, so both lists must be non-empty.
DCHECK(lhs_params != nullptr);
DCHECK(rhs_params != nullptr);
uint32_t params_size = lhs_shorty.size() - 1u;
DCHECK_EQ(params_size, lhs_params->Size()); // Parameter list sizes must match shorty.
DCHECK_EQ(params_size, rhs_params->Size());
for (uint32_t i = 0; i < params_size; ++i) {
const dex::TypeId& lhs_param_id = dex_file_->GetTypeId(lhs_params->GetTypeItem(i).type_idx_);
const dex::TypeId& rhs_param_id =
rhs.dex_file_->GetTypeId(rhs_params->GetTypeItem(i).type_idx_);
if (!DexFile::StringEquals(dex_file_, lhs_param_id.descriptor_idx_,
rhs.dex_file_, rhs_param_id.descriptor_idx_)) {
return false; // Parameter type mismatch.
}
}
}
return true;
}
inline int Signature::Compare(const Signature& rhs) const {
DCHECK(dex_file_ != nullptr);
DCHECK(rhs.dex_file_ != nullptr);
if (dex_file_ == rhs.dex_file_) {
return static_cast<int>(dex_file_->GetIndexForProtoId(*proto_id_).index_) -
static_cast<int>(rhs.dex_file_->GetIndexForProtoId(*rhs.proto_id_).index_);
}
// Use shorty to avoid looking at primitive type descriptors
// as long as they are not compared with reference descriptors.
std::string_view lhs_shorty = dex_file_->GetShortyView(*proto_id_);
std::string_view rhs_shorty = rhs.dex_file_->GetShortyView(*rhs.proto_id_);
// Note that 'L' in a shorty can represent an array type starting with '[',
// so do the full type descriptor comparison when we see 'L' in either shorty.
if (lhs_shorty[0] == 'L' || rhs_shorty[0] == 'L') {
std::string_view lhs_return_type = dex_file_->GetTypeDescriptorView(
dex_file_->GetTypeId(proto_id_->return_type_idx_));
std::string_view rhs_return_type = rhs.dex_file_->GetTypeDescriptorView(
rhs.dex_file_->GetTypeId(rhs.proto_id_->return_type_idx_));
int cmp_result = lhs_return_type.compare(rhs_return_type);
if (cmp_result != 0) {
return cmp_result;
}
} else if (lhs_shorty[0] != rhs_shorty[0]) {
return static_cast<int>(lhs_shorty[0]) - static_cast<int>(rhs_shorty[0]);
}
size_t min_shorty_size = std::min(lhs_shorty.size(), rhs_shorty.size());
if (min_shorty_size != 1u) { // If both shortys contain parameters, compare parameters.
const dex::TypeList* lhs_params = dex_file_->GetProtoParameters(*proto_id_);
const dex::TypeList* rhs_params = rhs.dex_file_->GetProtoParameters(*rhs.proto_id_);
DCHECK(lhs_params != nullptr);
DCHECK(rhs_params != nullptr);
for (size_t i = 1u; i != min_shorty_size; ++i) {
if (lhs_shorty[i] == 'L' || rhs_shorty[i] == 'L') {
std::string_view lhs_param_type = dex_file_->GetTypeDescriptorView(
dex_file_->GetTypeId(lhs_params->GetTypeItem(i - 1u).type_idx_));
std::string_view rhs_param_type = rhs.dex_file_->GetTypeDescriptorView(
rhs.dex_file_->GetTypeId(rhs_params->GetTypeItem(i - 1u).type_idx_));
int cmp_result = lhs_param_type.compare(rhs_param_type);
if (cmp_result != 0) {
return cmp_result;
}
} else if (lhs_shorty[i] != rhs_shorty[i]) {
return static_cast<int>(lhs_shorty[i]) - static_cast<int>(rhs_shorty[i]);
}
}
}
if (lhs_shorty.size() == rhs_shorty.size()) {
return 0;
} else if (lhs_shorty.size() < rhs_shorty.size()) {
return -1;
} else {
return 1;
}
}
} // namespace art
#endif // ART_LIBDEXFILE_DEX_SIGNATURE_INL_H_
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