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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.
*/
#include "signature-inl.h"
#include <string.h>
#include <ostream>
#include <type_traits>
#include "base/string_view_cpp20.h"
namespace art {
using dex::TypeList;
std::string Signature::ToString() const {
if (dex_file_ == nullptr) {
CHECK(proto_id_ == nullptr);
return "<no signature>";
}
const TypeList* params = dex_file_->GetProtoParameters(*proto_id_);
std::string result;
if (params == nullptr) {
result += "()";
} else {
result += "(";
for (uint32_t i = 0; i < params->Size(); ++i) {
result += dex_file_->StringByTypeIdx(params->GetTypeItem(i).type_idx_);
}
result += ")";
}
result += dex_file_->StringByTypeIdx(proto_id_->return_type_idx_);
return result;
}
uint32_t Signature::GetNumberOfParameters() const {
const TypeList* params = dex_file_->GetProtoParameters(*proto_id_);
return (params != nullptr) ? params->Size() : 0;
}
bool Signature::IsVoid() const {
const char* return_type = dex_file_->GetReturnTypeDescriptor(*proto_id_);
return strcmp(return_type, "V") == 0;
}
bool Signature::operator==(std::string_view rhs) const {
if (dex_file_ == nullptr) {
return false;
}
std::string_view tail(rhs);
if (!StartsWith(tail, "(")) {
return false; // Invalid signature
}
tail.remove_prefix(1); // "(";
const TypeList* params = dex_file_->GetProtoParameters(*proto_id_);
if (params != nullptr) {
for (uint32_t i = 0; i < params->Size(); ++i) {
std::string_view param(dex_file_->StringByTypeIdx(params->GetTypeItem(i).type_idx_));
if (!StartsWith(tail, param)) {
return false;
}
tail.remove_prefix(param.length());
}
}
if (!StartsWith(tail, ")")) {
return false;
}
tail.remove_prefix(1); // ")";
return tail == dex_file_->StringByTypeIdx(proto_id_->return_type_idx_);
}
std::ostream& operator<<(std::ostream& os, const Signature& sig) {
return os << sig.ToString();
}
} // namespace art